/* ==========================================================================
   Anti-Slop Craftsmanship Design System
   High-Contrast Editorial Typography, Fine Hairlines, Zero Cliché
   ========================================================================== */

:root {
  /* Light Theme (Natural Paper & Deep Charcoal) */
  --bg-page: #faf8f5;
  --bg-surface: rgba(255, 255, 255, 0.88);
  --bg-card: rgba(243, 240, 234, 0.82);
  --bg-card-hover: rgba(236, 232, 223, 0.95);
  --bg-tag: rgba(233, 228, 217, 0.85);
  
  --text-primary: #181716;
  --text-secondary: #4a4740;
  --text-muted: #7c776d;
  
  --border-subtle: rgba(24, 23, 22, 0.08);
  --border-medium: rgba(24, 23, 22, 0.16);
  --border-focus: #181716;
  
  --accent-ink: #b83a22;        /* Vermilion Terracotta */
  --accent-tint: rgba(184, 58, 34, 0.08);

  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --ease-craft: cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sharp: 4px;
  --radius-card: 10px;
}

/* Dark Theme (Rich Warm Obsidian & Alabaster) */
[data-theme="dark"] {
  --bg-page: #0e0e0d;
  --bg-surface: rgba(23, 22, 21, 0.88);
  --bg-card: rgba(29, 28, 26, 0.82);
  --bg-card-hover: rgba(38, 37, 34, 0.95);
  --bg-tag: rgba(43, 41, 38, 0.85);
  
  --text-primary: #f0ede6;
  --text-secondary: #aba599;
  --text-muted: #78736a;
  
  --border-subtle: rgba(240, 237, 230, 0.08);
  --border-medium: rgba(240, 237, 230, 0.16);
  --border-focus: #f0ede6;
  
  --accent-ink: #e26850;
  --accent-tint: rgba(226, 104, 80, 0.12);
}

@media (prefers-color-scheme: dark) {
  [data-theme="system"] {
    --bg-page: #0e0e0d;
    --bg-surface: rgba(23, 22, 21, 0.88);
    --bg-card: rgba(29, 28, 26, 0.82);
    --bg-card-hover: rgba(38, 37, 34, 0.95);
    --bg-tag: rgba(43, 41, 38, 0.85);
    
    --text-primary: #f0ede6;
    --text-secondary: #aba599;
    --text-muted: #78736a;
    
    --border-subtle: rgba(240, 237, 230, 0.08);
    --border-medium: rgba(240, 237, 230, 0.16);
    --border-focus: #f0ede6;
    
    --accent-ink: #e26850;
    --accent-tint: rgba(226, 104, 80, 0.12);
  }
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  position: relative;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* Fluid Ambient Ink Motion Canvas */
.bg-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 1;
  filter: blur(40px);
  transform: scale(1.08); /* Prevent edge vignette clip */
  transition: opacity 0.5s ease;
}

[data-theme="dark"] .bg-canvas {
  opacity: 0.95;
  filter: blur(55px);
}

/* Ambient Soft Glowing Orbs (CSS Gradient Flow) */
.ambient-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-glow::before,
.ambient-glow::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
  animation: floatAmbient 22s infinite ease-in-out alternate;
}

.ambient-glow::before {
  width: 460px;
  height: 460px;
  top: -100px;
  right: -80px;
  background: radial-gradient(circle, var(--accent-ink) 0%, rgba(184, 58, 34, 0) 70%);
  opacity: 0.22;
}

.ambient-glow::after {
  width: 520px;
  height: 520px;
  bottom: -120px;
  left: -120px;
  background: radial-gradient(circle, #2d6b94 0%, rgba(45, 107, 148, 0) 70%);
  opacity: 0.18;
  animation-duration: 28s;
  animation-direction: alternate-reverse;
}

[data-theme="dark"] .ambient-glow::before {
  opacity: 0.18;
  background: radial-gradient(circle, var(--accent-ink) 0%, rgba(226, 104, 80, 0) 70%);
}

[data-theme="dark"] .ambient-glow::after {
  opacity: 0.14;
  background: radial-gradient(circle, #3d6e8a 0%, rgba(61, 110, 138, 0) 70%);
}

@keyframes floatAmbient {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-40px, 60px) scale(1.12);
  }
  100% {
    transform: translate(50px, -30px) scale(0.95);
  }
}

/* Subtle Organic Paper Grain */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Container */
.site-container {
  width: 100%;
  max-width: 580px;
  padding: 3.5rem 1.4rem 4.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Header & Identity
   ========================================================================== */

.profile-header {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.header-topline {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: -0.01em;
}

.time-dot {
  color: var(--border-medium);
}

.live-clock {
  color: var(--text-secondary);
  font-weight: 500;
}

.identity-block {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.avatar-frame {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sharp);
  background: var(--text-primary);
  color: var(--bg-page);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 500;
  user-select: none;
  flex-shrink: 0;
  border: 1px solid var(--border-subtle);
}

.identity-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.name-line {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.profile-name {
  font-family: var(--font-serif);
  font-size: 2.1rem;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.handle-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sharp);
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.handle-badge:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.copy-svg {
  opacity: 0.5;
  transition: opacity 0.15s ease;
}

.handle-badge:hover .copy-svg {
  opacity: 1;
}

.profile-role {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-ink);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.role-sep {
  color: var(--border-medium);
  font-size: 0.72rem;
  user-select: none;
}

.profile-subname {
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 400;
}

.bio-text {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* Action Bar */
.action-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn-action {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sharp);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s var(--ease-craft);
}

.btn-action:hover {
  background: var(--text-primary);
  color: var(--bg-page);
  border-color: var(--text-primary);
}

/* ==========================================================================
   Main Content & Sections
   ========================================================================== */

.main-content {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.content-section {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.section-heading {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-subtle);
}

.section-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.35rem;
}

.section-title-row .section-heading {
  border-bottom: none;
  padding-bottom: 0;
}

.section-more-link {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.15s ease;
}

.section-more-link .play-icon {
  flex-shrink: 0;
  opacity: 0.85;
  transition: transform 0.2s var(--ease-craft), opacity 0.15s ease;
}

.section-more-link:hover {
  color: var(--accent-ink);
}

.section-more-link:hover .play-icon {
  opacity: 1;
  transform: scale(1.08);
}

/* Google Play Apps Grid (2-column layout) */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

.app-card {
  text-decoration: none;
  background: var(--bg-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 0.95rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: all 0.2s var(--ease-craft);
  position: relative;
}

.app-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-2px);
}

.app-badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-ink);
  background: var(--bg-tag);
  padding: 0.12rem 0.45rem;
  border-radius: var(--radius-sharp);
  border: 1px solid var(--border-subtle);
  letter-spacing: 0.02em;
}

.app-title-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.3rem;
}

.app-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.25;
}

.app-card .item-arrow {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.15s ease, transform 0.15s var(--ease-craft);
}

.app-card:hover .item-arrow {
  color: var(--accent-ink);
  transform: translate(2px, -2px);
}

.app-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.app-card-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--border-subtle);
}

.app-btn-detail,
.app-btn-store {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sharp);
  transition: all 0.15s ease;
}

.app-btn-detail {
  color: var(--text-primary);
  background: var(--bg-tag);
  border: 1px solid var(--border-subtle);
  flex: 1;
  justify-content: center;
}

.app-btn-detail:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  color: var(--accent-ink);
}

.app-btn-detail .btn-arrow {
  transition: transform 0.15s var(--ease-craft);
}

.app-btn-detail:hover .btn-arrow {
  transform: translateX(2px);
}

.app-btn-store {
  color: var(--text-muted);
  border: 1px solid transparent;
}

.app-btn-store:hover {
  color: var(--accent-ink);
}

.app-btn-store .play-icon {
  opacity: 0.8;
}

.app-btn-store:hover .play-icon {
  opacity: 1;
}

@media (max-width: 520px) {
  .apps-grid {
    grid-template-columns: 1fr;
  }
}

/* Cards Stack */
.cards-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.item-card {
  text-decoration: none;
  background: var(--bg-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 0.9rem 1.05rem;
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  transition: all 0.2s var(--ease-craft);
  position: relative;
}

.item-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateX(3px);
}

.item-card.featured {
  border-color: var(--border-medium);
}

.item-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sharp);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  flex-shrink: 0;
}

.item-icon.line-green {
  color: #06c755;
}

.icon-letter {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1;
}

.item-content {
  flex: 1;
  min-width: 0;
}

.item-header {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  margin-bottom: 0.15rem;
}

.item-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

.item-meta {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.item-arrow {
  margin-left: auto;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.15s ease, transform 0.15s var(--ease-craft);
}

.item-card:hover .item-arrow {
  color: var(--accent-ink);
  transform: translate(2px, -2px);
}

.item-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Tech Stack & Capabilities Grid */
.stack-grid {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.stack-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 0.95rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: border-color 0.2s ease;
}

.stack-card:hover {
  border-color: var(--border-medium);
}

.stack-category {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-ink);
  letter-spacing: 0.02em;
}

.stack-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stack-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.mini-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sharp);
  border: 1px solid var(--border-subtle);
  line-height: 1.3;
}

/* ==========================================================================
   Footer & Theme Picker
   ========================================================================== */

.profile-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.footer-nav-link {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--border-medium);
  transition: color 0.15s ease;
}

.footer-nav-link:hover {
  color: var(--accent-ink);
  text-decoration-color: var(--accent-ink);
}

.theme-picker,
.lang-picker {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.15rem;
  gap: 0.1rem;
}

.theme-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.3rem 0.4rem;
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.5rem;
  border-radius: 3px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.theme-btn:hover,
.lang-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.theme-btn.active,
.lang-btn.active {
  color: var(--text-primary);
  background: var(--bg-surface);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.footer-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ==========================================================================
   Legal Page (privacy.html)
   ========================================================================== */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sharp);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  align-self: flex-start;
  transition: all 0.15s ease;
}

.back-link:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background: var(--bg-card-hover);
}

.legal-header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.legal-title {
  font-family: var(--font-serif);
  font-size: 1.95rem;
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.legal-meta {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.legal-article {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.legal-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.legal-section-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  padding-bottom: 0.2rem;
  border-bottom: 1px dashed var(--border-subtle);
}

.legal-list {
  padding-left: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* ==========================================================================
   Minimal Toast
   ========================================================================== */

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--text-primary);
  color: var(--bg-page);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sharp);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.2s var(--ease-craft);
  z-index: 9999;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 480px) {
  .site-container {
    padding: 2.25rem 1.1rem 3.5rem;
    gap: 2rem;
  }
  
  .identity-block {
    align-items: flex-start;
  }
  
  .profile-name {
    font-size: 1.8rem;
  }

  .btn-action {
    flex: 1;
    justify-content: center;
  }

  .profile-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   Apps Catalog & Detail Page (apps.html)
   ========================================================================== */

.page-main-heading {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.2;
}

.apps-page-lead {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: 0.4rem;
}

.app-detail-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.app-detail-card {
  background: var(--bg-surface);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.35rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  transition: all 0.2s var(--ease-craft);
  scroll-margin-top: 2rem;
}

.app-detail-card:target {
  border-color: var(--accent-ink);
  box-shadow: 0 0 0 1px var(--accent-ink);
}

.app-detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.app-detail-title-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.app-detail-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.25;
}

.btn-play-cta {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg-tag);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-play-cta:hover {
  background: var(--text-primary);
  color: var(--bg-page);
  border-color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-play-cta .play-icon {
  transition: transform 0.15s ease;
}

.btn-play-cta:hover .play-icon {
  transform: scale(1.1);
}

.app-detail-body {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.app-feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.app-feature-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-ink);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.app-feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
}

.app-feature-list li {
  font-size: 0.82rem;
  color: var(--text-primary);
  line-height: 1.5;
  position: relative;
  padding-left: 1rem;
}

.app-feature-list li::before {
  content: "•";
  position: absolute;
  left: 0.2rem;
  color: var(--text-muted);
}

.app-tech-footer {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.app-tech-label {
  color: var(--text-muted);
  flex-shrink: 0;
}

.app-tech-tags {
  color: var(--text-secondary);
}

/* ==========================================================================
   Individual App Page Styles (apps/*.html) & Catalog Enhancements
   ========================================================================== */

.header-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
}

.app-hero-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.app-single-title {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.app-single-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.app-section-block {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.app-section-heading {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent-ink);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.app-tech-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.app-cta-banner {
  padding-top: 0.5rem;
}

.btn-play-large {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  background: var(--text-primary);
  color: var(--bg-page);
  border: 1px solid var(--text-primary);
  border-radius: var(--radius-sharp);
  transition: all 0.2s var(--ease-craft);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn-play-large:hover {
  background: var(--accent-ink);
  border-color: var(--accent-ink);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.btn-play-large .play-icon {
  transition: transform 0.2s var(--ease-craft);
}

.btn-play-large:hover .play-icon {
  transform: scale(1.1);
}

/* Other Apps Navigation */
.other-apps-section {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.other-apps-heading {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.other-apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.5rem;
}

.other-app-mini {
  text-decoration: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.6rem 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-primary);
  transition: all 0.15s ease;
}

.other-app-mini:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  color: var(--accent-ink);
  transform: translateY(-1px);
}

.other-app-arrow {
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: transform 0.15s var(--ease-craft), color 0.15s ease;
}

.other-app-mini:hover .other-app-arrow {
  color: var(--accent-ink);
  transform: translateX(2px);
}

/* Catalog header actions */
.app-header-ctas {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.btn-detail-link {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.35rem 0.65rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  transition: all 0.15s ease;
}

.btn-detail-link:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-ink);
  color: var(--accent-ink);
}

.app-detail-title-link {
  text-decoration: none;
  color: inherit;
  transition: color 0.15s ease;
}

.app-detail-title-link:hover {
  color: var(--accent-ink);
}

/* ==========================================================================
   Sudoku 9x9 Generator & Solver Styles
   ========================================================================== */

.sudoku-container {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Mode Switcher Tabs */
.sudoku-mode-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
}

.sudoku-tab-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.45rem 0.9rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sharp);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.sudoku-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.sudoku-tab-btn.active {
  color: var(--text-primary);
  background: var(--bg-surface);
  border-color: var(--border-medium);
  font-weight: 600;
}

/* Sudoku Top Controls */
.sudoku-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.sudoku-diff-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sudoku-select {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  padding: 0.45rem 0.8rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  outline: none;
}

.sudoku-select:focus {
  border-color: var(--border-focus);
}

.btn-sudoku-primary {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  background: var(--text-primary);
  color: var(--bg-page);
  border: 1px solid var(--text-primary);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.btn-sudoku-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Stats Bar */
.sudoku-stats-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.55rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.stat-val {
  font-weight: 600;
  color: var(--text-primary);
}

/* Status / Alert Banner */
.sudoku-banner {
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sharp);
  font-size: 0.86rem;
  font-weight: 500;
  display: none;
  animation: fadeIn 0.2s ease;
}

.banner-info {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.banner-success {
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

[data-theme="dark"] .banner-success {
  color: #4ade80;
  border-color: rgba(74, 222, 128, 0.3);
}

.banner-error {
  background: rgba(239, 68, 68, 0.12);
  color: #b91c1c;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

[data-theme="dark"] .banner-error {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.3);
}

/* 9x9 Board Layout */
.sudoku-board-wrapper {
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  position: relative;
}

.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--bg-surface);
  border: 2.5px solid var(--text-primary);
  border-radius: var(--radius-sharp);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.sudoku-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  user-select: none;
  background: transparent;
  transition: background 0.1s ease, color 0.1s ease;
  outline: none;
}

.sudoku-cell:focus {
  outline: none;
}

.sudoku-cell.border-right-bold {
  border-right: 2.5px solid var(--text-primary) !important;
}

.sudoku-cell.border-bottom-bold {
  border-bottom: 2.5px solid var(--text-primary) !important;
}

/* Cell Value Types */
.cell-value {
  line-height: 1;
  display: block;
}

.sudoku-cell.initial .cell-value {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3.5vw, 1.7rem);
  font-weight: 600;
  color: var(--text-primary);
}

.sudoku-cell.user-entered .cell-value {
  font-family: var(--font-sans);
  font-size: clamp(1.15rem, 3.2vw, 1.55rem);
  font-weight: 700;
  color: var(--accent-ink);
}

/* Interactive Highlights */
.sudoku-cell.selected {
  background: var(--accent-tint) !important;
  box-shadow: inset 0 0 0 2px var(--accent-ink);
  z-index: 2;
}

.sudoku-cell.highlighted {
  background: rgba(184, 58, 34, 0.04);
}

[data-theme="dark"] .sudoku-cell.highlighted {
  background: rgba(226, 104, 80, 0.07);
}

.sudoku-cell.same-number {
  background: rgba(184, 58, 34, 0.16) !important;
}

[data-theme="dark"] .sudoku-cell.same-number {
  background: rgba(226, 104, 80, 0.22) !important;
}

.sudoku-cell.conflict {
  background: rgba(239, 68, 68, 0.2) !important;
  color: #dc2626 !important;
}

/* Animations */
@keyframes hintPulse {
  0% { background-color: rgba(34, 197, 94, 0.5); transform: scale(1.1); }
  100% { background-color: transparent; transform: scale(1); }
}

@keyframes mistakePulse {
  0% { background-color: rgba(239, 68, 68, 0.5); }
  100% { background-color: transparent; }
}

.hint-flash { animation: hintPulse 0.5s ease; }
.mistake-flash { animation: mistakePulse 0.5s ease; }

/* Pencil Grid (Notes) */
.pencil-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 100%;
  height: 100%;
  padding: 2px;
  pointer-events: none;
}

.pencil-num {
  font-family: var(--font-mono);
  font-size: clamp(0.5rem, 1.4vw, 0.65rem);
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* Numpad & Controls */
.sudoku-controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.sudoku-numpad {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 0.35rem;
}

.numpad-digit {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 0.2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.numpad-digit:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-ink);
  transform: translateY(-1px);
}

.numpad-digit:active {
  transform: translateY(0);
}

.num-main {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.num-count {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-top: 3px;
  line-height: 1;
}

.num-count.completed {
  color: #16a34a;
  font-weight: 700;
}

.numpad-digit.all-placed {
  opacity: 0.4;
}

/* Action Buttons Bar */
.sudoku-actions-bar {
  display: flex;
  justify-content: space-between;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.btn-tool {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.btn-tool:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-primary);
}

.btn-tool:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  border-color: var(--border-subtle);
}

.btn-tool.active {
  background: var(--accent-ink);
  color: #ffffff;
  border-color: var(--accent-ink);
}

/* Footer / Export Bar */
.sudoku-export-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.btn-export-subtle {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-export-subtle:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background: var(--bg-surface);
}

/* Keyboard guide tooltip */
.keyboard-guide {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
  margin-top: 0.5rem;
}

.kbd-badge {
  display: inline-block;
  padding: 0.1rem 0.35rem;
  background: var(--bg-tag);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  font-size: 0.68rem;
  margin: 0 0.15rem;
}

/* ==========================================================================
   Print Friendly Styles for Sudoku (@media print)
   ========================================================================== */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .bg-canvas,
  .ambient-glow,
  .noise-overlay,
  .profile-header,
  .sudoku-topbar,
  .sudoku-stats-bar,
  .sudoku-mode-tabs,
  .sudoku-controls,
  .sudoku-export-bar,
  .keyboard-guide,
  .site-footer,
  .back-link,
  .sudoku-banner {
    display: none !important;
  }

  .site-container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .sudoku-container {
    max-width: 100% !important;
    margin: 0 auto !important;
  }

  .sudoku-board-wrapper {
    max-width: 500px !important;
    margin: 20px auto !important;
  }

  .sudoku-board {
    border: 3px solid #000000 !important;
    box-shadow: none !important;
    background: #ffffff !important;
  }

  .sudoku-cell {
    border-right: 1px solid #999999 !important;
    border-bottom: 1px solid #999999 !important;
    background: #ffffff !important;
  }

  .sudoku-cell.border-right-bold {
    border-right: 3px solid #000000 !important;
  }

  .sudoku-cell.border-bottom-bold {
    border-bottom: 3px solid #000000 !important;
  }

  .sudoku-cell.initial .cell-value {
    color: #000000 !important;
    font-weight: bold !important;
  }

  .sudoku-cell.user-entered .cell-value {
    display: none !important; /* Keep generated blank puzzle for paper print */
  }

  .pencil-grid {
    display: none !important;
  }
}

/* ==========================================================================
   Queens & Star Battle Web Tool (tools/queens.html)
   ========================================================================== */

.queens-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 540px;
  margin: 0 auto;
}

/* Topbar & Mode Switch */
.queens-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.queens-mode-group {
  display: inline-flex;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 0.2rem;
  gap: 0.2rem;
}

.btn-queens-mode {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 0.35rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-queens-mode.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  font-weight: 600;
}

.queens-size-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.queens-select {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.4rem 0.65rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  outline: none;
}

.btn-queens-primary {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.4rem 0.85rem;
  background: var(--accent-ink);
  color: #ffffff;
  border: 1px solid var(--accent-ink);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.btn-queens-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Rules Accordion */
.queens-rules-accordion {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  overflow: hidden;
  transition: all 0.2s ease;
}

.queens-rules-summary {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.55rem 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  user-select: none;
}

.queens-rules-summary:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.queens-rules-content {
  padding: 0.75rem 1rem 0.85rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  border-top: 1px solid var(--border-subtle);
}

.rules-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.rules-list strong {
  color: var(--text-primary);
}

/* Stats Bar */
.queens-stats-bar {
  display: flex;
  justify-content: space-around;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.5rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.queens-banner {
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sharp);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-align: center;
  line-height: 1.4;
}

.queens-banner.banner-success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #15803d;
}

html[data-theme="dark"] .queens-banner.banner-success,
html[data-theme="system"] .queens-banner.banner-success {
  color: #4ade80;
}

.queens-banner.banner-info {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
}

/* Board Layout */
.queens-board-wrapper {
  display: flex;
  justify-content: center;
  width: 100%;
}

.queens-board {
  --queens-size: 8;
  display: grid;
  grid-template-columns: repeat(var(--queens-size), 1fr);
  grid-template-rows: repeat(var(--queens-size), 1fr);
  width: 100%;
  max-width: 440px;
  aspect-ratio: 1 / 1;
  background: var(--bg-surface);
  border: 3px solid var(--text-primary);
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  user-select: none;
  touch-action: none; /* Smooth drag on touch devices */
  overflow: hidden;
}

.queens-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 0, 0, 0.07);
  cursor: pointer;
  transition: filter 0.12s ease, transform 0.08s ease;
}

html[data-theme="dark"] .queens-cell {
  border-color: rgba(255, 255, 255, 0.06);
}

.queens-cell:hover {
  filter: brightness(0.94);
}

html[data-theme="dark"] .queens-cell:hover {
  filter: brightness(1.15);
}

/* Thick region borders */
.queens-cell.border-top-thick {
  border-top: 3px solid var(--text-primary);
}

.queens-cell.border-bottom-thick {
  border-bottom: 3px solid var(--text-primary);
}

.queens-cell.border-left-thick {
  border-left: 3px solid var(--text-primary);
}

.queens-cell.border-right-thick {
  border-right: 3px solid var(--text-primary);
}

/* Selected Cell */
.queens-cell.is-selected {
  outline: 2px solid var(--accent-ink);
  outline-offset: -2px;
  z-index: 2;
}

/* Queen Icon */
.queen-icon {
  font-size: clamp(1.2rem, 4vw, 1.85rem);
  line-height: 1;
  transform: scale(0.9);
  animation: queenPop 0.2s var(--ease-craft) forwards;
  pointer-events: none;
}

@keyframes queenPop {
  0% { transform: scale(0.4); opacity: 0; }
  70% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

/* Mark (X) Icon */
.mark-icon {
  font-size: clamp(0.75rem, 2.5vw, 1.1rem);
  font-weight: 700;
  color: var(--text-muted);
  opacity: 0.6;
  line-height: 1;
  pointer-events: none;
}

/* Conflict highlight */
.queens-cell.is-conflict {
  background-color: rgba(239, 68, 68, 0.4) !important;
  animation: shakeCell 0.3s ease;
}

@keyframes shakeCell {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

/* Hint Pulse */
.queens-cell.hint-pulse {
  animation: hintGlow 1.8s ease;
}

@keyframes hintGlow {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: inset 0 0 0 3px #f59e0b; }
}

/* Input tabs & controls */
.queens-controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.queens-input-tabs {
  display: flex;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.25rem;
  gap: 0.25rem;
}

.queens-mode-btn {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 0.45rem 0.2rem;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.queens-mode-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.queens-actions-bar {
  display: flex;
  justify-content: space-between;
  gap: 0.45rem;
  flex-wrap: wrap;
}

/* Share Modal */
.queens-modal {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.queens-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
}

.queens-modal-dialog {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-card);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: modalEnter 0.25s var(--ease-craft);
}

@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-primary);
}

.btn-modal-close {
  background: transparent;
  border: none;
  font-size: 1.1rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.3rem;
  line-height: 1;
}

.btn-modal-close:hover {
  color: var(--text-primary);
}

.modal-lead {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
}

.share-format-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.share-format-tabs {
  display: inline-flex;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.15rem;
  gap: 0.15rem;
}

.share-format-btn {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.3rem 0.55rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.share-format-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.share-char-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.share-preview-box {
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.4;
  max-height: 180px;
  overflow-y: auto;
  margin: 0;
}

.modal-footer {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.btn-queens-subtle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.5rem 0.85rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-queens-subtle:hover {
  background: var(--bg-card-hover);
}

.btn-queens-x {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 1rem;
  background: #000000;
  color: #ffffff;
  border: 1px solid #000000;
  border-radius: var(--radius-sharp);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}

html[data-theme="dark"] .btn-queens-x {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

.btn-queens-x:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* Confetti Pieces */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9990;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -20px;
  width: 10px;
  height: 14px;
  opacity: 0.9;
  animation: confettiFall 3s linear forwards;
}

@keyframes confettiFall {
  0% { transform: translateY(0) rotate(0deg); opacity: 1; }
  100% { transform: translateY(105vh) rotate(720deg); opacity: 0; }
}

@media (max-width: 480px) {
  .queens-board {
    max-width: 340px;
  }

  .queens-actions-bar .btn-tool {
    flex: 1 1 30%;
    justify-content: center;
  }
}

/* ==========================================================================
   WhatIsMyIP & Client Inspector (SCR-012)
   ========================================================================== */
.checker-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  width: 100%;
}

/* Hero IP Card */
.checker-hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-card);
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.checker-hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--text-primary), var(--text-muted), transparent);
}

.hero-ip-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-live-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: livePulse 2s infinite;
}

@keyframes livePulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.hero-ip-display {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-ip-val {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.btn-hero-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s var(--ease-craft);
}

.btn-hero-copy:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

/* Hero Dual-Stack Grid */
.hero-dual-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.65rem;
  margin-top: 0.25rem;
}

.hero-sub-ip-card {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  padding: 0.45rem 0.75rem;
  font-size: 0.82rem;
  transition: border-color 0.15s ease;
}

.hero-sub-ip-card:hover {
  border-color: var(--text-muted);
}

.hero-sub-ip-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  background: var(--border-medium);
  color: var(--text-primary);
  border-radius: 3px;
  letter-spacing: 0.04em;
}

.hero-sub-ip-val {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-sub-copy {
  background: transparent;
  border: none;
  font-size: 0.85rem;
  cursor: pointer;
  opacity: 0.6;
  padding: 0.2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  transition: all 0.15s ease;
}

.btn-sub-copy:hover {
  opacity: 1;
  transform: scale(1.1);
  background: var(--border-medium);
}

.hero-dual-badge {
  color: #10b981;
  font-weight: 600;
  font-size: 0.82rem;
}

.hero-isp-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.hero-sep {
  color: var(--border-medium);
}

.hero-status-val {
  color: #10b981;
  font-weight: 500;
}

/* Action Toolbar */
.checker-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.checker-main-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.btn-checker-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  background: var(--text-primary);
  color: var(--bg-page);
  border: 1px solid var(--text-primary);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s var(--ease-craft);
}

.btn-checker-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-checker-share {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 600;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s var(--ease-craft);
}

.btn-checker-share:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-muted);
}

.checker-sub-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-checker-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s var(--ease-craft);
}

.btn-checker-secondary:hover {
  background: var(--bg-card-hover);
}

.btn-checker-secondary.is-spinning svg {
  animation: spin 0.8s linear infinite;
}

/* Keyboard Shortcuts Tip Bar */
.checker-shortcut-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.76rem;
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  margin-top: -0.25rem;
}

.shortcut-tip-icon {
  flex-shrink: 0;
  color: var(--text-muted);
  opacity: 0.8;
}

.checker-shortcut-bar kbd {
  display: inline-block;
  padding: 0.12rem 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: 3px;
  box-shadow: 0 1px 0 var(--border-medium);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Cards Grid */
.checker-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.25rem;
}

.checker-card {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-card);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.2s ease;
}

.checker-card:hover {
  border-color: var(--border-strong);
}

.checker-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
}

.checker-card-icon {
  font-size: 1.15rem;
}

.checker-card-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.checker-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.checker-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--border-subtle);
}

.checker-row:last-child {
  border-bottom: none;
}

.checker-label {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.checker-val-group {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  max-width: 65%;
  justify-content: flex-end;
}

.checker-val {
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-primary);
  text-align: right;
  word-break: break-all;
}

.checker-val.code-font {
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.checker-val.highlight-val {
  font-weight: 600;
  color: var(--text-primary);
}

.checker-val.badge-safe {
  color: #10b981;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
}

.btn-copy-val {
  background: transparent;
  border: none;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem 0.3rem;
  border-radius: 3px;
  opacity: 0.6;
  transition: all 0.15s ease;
}

.btn-copy-val:hover {
  opacity: 1;
  background: var(--bg-surface);
  transform: scale(1.1);
}

.checker-row-stack {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding-top: 0.4rem;
}

.checker-row-subhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.checker-ua-box {
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sharp);
  padding: 0.65rem 0.8rem;
  font-size: 0.74rem;
  line-height: 1.4;
  color: var(--text-secondary);
  word-break: break-all;
  max-height: 90px;
  overflow-y: auto;
}

/* Privacy Note */
.checker-privacy-note {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.checker-privacy-note .privacy-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.checker-privacy-note p {
  margin: 0;
}

@media (max-width: 600px) {
  .checker-cards-grid {
    grid-template-columns: 1fr;
  }
  .checker-hero-card {
    padding: 1.25rem;
  }
  .hero-ip-display {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-dual-grid {
    grid-template-columns: 1fr;
  }
  .checker-main-actions {
    width: 100%;
    flex-direction: column;
  }
  .btn-checker-primary,
  .btn-checker-share {
    width: 100%;
    justify-content: center;
  }
  .checker-sub-actions {
    width: 100%;
    justify-content: space-between;
  }
  .checker-shortcut-bar {
    display: none; /* Hide keyboard shortcuts on touch devices */
  }
}

/* ==========================================================================
   Interactive 3D Solar System Orrery (SCR-013)
   ========================================================================== */
.solar-body {
  background-color: #030308 !important;
  color: #f8fafc;
  overflow-x: hidden;
}

.solar-page-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

/* Header */
.solar-header {
  padding: 1.5rem 2rem 1rem;
  position: relative;
  z-index: 20;
  background: linear-gradient(180deg, rgba(3, 3, 8, 0.95) 0%, rgba(3, 3, 8, 0.6) 70%, transparent 100%);
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.solar-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.solar-main-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 500;
  color: #f8fafc;
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem 0;
  background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.solar-subheading {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  line-height: 1.5;
  color: #94a3b8;
  max-width: 800px;
  margin: 0;
}

/* Main 3D Viewport Area */
.solar-main {
  flex: 1;
  position: relative;
  min-height: calc(100vh - 220px);
  display: flex;
  flex-direction: column;
}

.solar-viewport {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
}

.solar-viewport:active {
  cursor: grabbing;
}

/* Quick Planet Navigator */
.solar-nav-bar {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 30px;
  padding: 0.35rem 0.5rem;
  z-index: 30;
  max-width: 92vw;
  overflow-x: auto;
  scrollbar-width: none;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.solar-nav-bar::-webkit-scrollbar {
  display: none;
}

.btn-planet-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  color: #cbd5e1;
  background: transparent;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.btn-planet-nav:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.btn-planet-nav.active {
  color: #ffffff;
  background: rgba(56, 189, 248, 0.25);
  border: 1px solid rgba(56, 189, 248, 0.5);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
}

/* Time & Simulation Controls Panel (Draggable) */
.solar-controls-panel {
  position: absolute;
  bottom: 1.5rem;
  left: 2rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-card);
  padding: 0.5rem 0.85rem;
  z-index: 30;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  user-select: none;
  cursor: default;
}

.solar-controls-panel .drag-grip {
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  cursor: -webkit-grab;
  color: #64748b;
  padding: 0.2rem 0.1rem;
  transition: color 0.15s ease;
}

.solar-controls-panel .drag-grip:hover {
  color: #38bdf8;
}

.solar-controls-panel.is-dragging {
  cursor: grabbing !important;
  cursor: -webkit-grabbing !important;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.8), 0 0 16px rgba(56, 189, 248, 0.3);
  border-color: rgba(56, 189, 248, 0.5);
}

.solar-controls-panel.is-dragging * {
  cursor: grabbing !important;
}

/* Planet Dossier Panel (Draggable Slide-in) */
.planet-dossier {
  position: absolute;
  top: 1rem;
  right: 2rem;
  width: 380px;
  max-width: calc(100vw - 3rem);
  max-height: calc(100% - 2rem);
  overflow-y: auto;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  z-index: 40;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  transform: translateX(120%);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

.planet-dossier.visible {
  transform: translateX(0);
  opacity: 1;
}

.planet-dossier.is-dragging {
  cursor: grabbing !important;
  cursor: -webkit-grabbing !important;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.9), 0 0 20px rgba(56, 189, 248, 0.3);
  border-color: rgba(56, 189, 248, 0.5);
  transition: none !important;
}

.planet-dossier.is-dragging * {
  cursor: grabbing !important;
}

.dossier-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 0.85rem;
  margin-bottom: 1rem;
  cursor: grab;
  cursor: -webkit-grab;
  user-select: none;
}

.dossier-header-left {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.dossier-header-left .drag-grip {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  margin-top: 0.35rem;
  transition: color 0.15s ease;
}

.dossier-header:hover .drag-grip {
  color: #38bdf8;
}

.btn-solar-ctrl {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  background: #38bdf8;
  color: #030308;
  border: none;
  border-radius: var(--radius-sharp);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-solar-ctrl:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

.solar-speed-group {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding-left: 0.6rem;
}

.ctrl-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: #94a3b8;
  margin-right: 0.2rem;
}

.btn-speed-opt {
  padding: 0.3rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-speed-opt:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-speed-opt.active {
  background: #38bdf8;
  color: #030308;
  font-weight: 600;
  border-color: #38bdf8;
}

.solar-toggle-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding-left: 0.6rem;
}

.btn-solar-toggle {
  padding: 0.35rem 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  color: #94a3b8;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-solar-toggle:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
}

.btn-solar-toggle.active {
  color: #38bdf8;
  border-color: rgba(56, 189, 248, 0.4);
  background: rgba(56, 189, 248, 0.1);
}

.solar-zoom-group {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding-left: 0.6rem;
}

.btn-solar-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-size: 0.8rem;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-solar-icon-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.08);
}

.btn-solar-icon-btn:active {
  transform: scale(0.95);
}

/* Controls Hint */
.solar-hint-badge {
  position: absolute;
  bottom: 1.5rem;
  right: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 0.4rem 0.85rem;
  font-family: var(--font-sans);
  font-size: 0.74rem;
  color: #94a3b8;
  z-index: 25;
  pointer-events: none;
}

/* Planet Dossier Panel (Slide-in) */
.planet-dossier {
  position: absolute;
  top: 1rem;
  right: 2rem;
  width: 380px;
  max-width: calc(100vw - 3rem);
  max-height: calc(100% - 2rem);
  overflow-y: auto;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  z-index: 40;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  transform: translateX(120%);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

.planet-dossier.visible {
  transform: translateX(0);
  opacity: 1;
}

.dossier-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 0.85rem;
  margin-bottom: 1rem;
}

.dossier-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: #f8fafc;
  margin: 0 0 0.2rem 0;
}

.dossier-type {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: #38bdf8;
  letter-spacing: 0.04em;
}

.btn-close-dossier {
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: #94a3b8;
  font-size: 0.9rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.btn-close-dossier:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

.dossier-desc {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.6;
  color: #cbd5e1;
  margin-bottom: 1.25rem;
}

.dossier-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.dossier-stat-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.dossier-stat-item .stat-lbl {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: #94a3b8;
}

.dossier-stat-item .stat-val {
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  color: #f8fafc;
}

@media (max-width: 768px) {
  .solar-nav-bar {
    top: 0.5rem;
    left: 0.5rem;
    right: 0.5rem;
    transform: none;
    max-width: calc(100vw - 1rem);
    padding: 0.35rem 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
    justify-content: flex-start;
    scrollbar-width: none;
  }
  .solar-nav-bar::-webkit-scrollbar {
    display: none;
  }
  .btn-planet-nav {
    flex-shrink: 0;
    padding: 0.35rem 0.65rem;
    font-size: 0.74rem;
  }

  .solar-controls-panel {
    bottom: 0.75rem !important;
    left: 0.5rem !important;
    right: 0.5rem !important;
    width: calc(100vw - 1rem) !important;
    max-width: calc(100vw - 1rem) !important;
    transform: none !important;
    padding: 0.4rem 0.6rem;
    gap: 0.35rem;
    justify-content: space-between;
  }
  .solar-controls-panel .solar-speed-group,
  .solar-controls-panel .solar-toggle-group,
  .solar-controls-panel .solar-zoom-group {
    padding-left: 0.35rem;
    gap: 0.15rem;
  }
  .btn-solar-ctrl {
    padding: 0.35rem 0.6rem;
    font-size: 0.74rem;
  }
  .btn-speed-opt {
    padding: 0.25rem 0.45rem;
    font-size: 0.7rem;
  }
  .btn-solar-toggle {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
  }

  .solar-hint-badge {
    display: none;
  }

  /* Planet Dossier Bottom Sheet on Mobile */
  .planet-dossier {
    position: fixed !important;
    bottom: 0 !important;
    top: auto !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    max-width: 100vw !important;
    max-height: 75vh !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    border-radius: 20px 20px 0 0 !important;
    border-bottom: none !important;
    border-left: none !important;
    border-right: none !important;
    padding: 0.75rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom, 16px)) 1.25rem !important;
    transform: translateY(115%);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
    z-index: 90 !important;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.85), 0 -1px 0 rgba(255, 255, 255, 0.15) !important;
  }

  /* Handle notch bar indicator on mobile bottom sheet */
  .planet-dossier::before {
    content: '';
    display: block;
    width: 36px;
    height: 4px;
    background: rgba(255, 255, 255, 0.35);
    border-radius: 2px;
    margin: 0 auto 0.6rem auto;
  }

  .planet-dossier.visible {
    transform: translateY(0);
  }

  .dossier-header {
    padding-bottom: 0.5rem;
    margin-bottom: 0.6rem;
  }

  .dossier-title {
    font-size: 1.25rem;
  }

  .dossier-type {
    font-size: 0.7rem;
  }

  .dossier-stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.4rem;
    margin-bottom: 0.6rem;
  }

  .stat-card {
    padding: 0.4rem 0.55rem;
    border-radius: 6px;
  }

  .stat-label {
    font-size: 0.64rem;
    margin-bottom: 0.15rem;
  }

  .stat-val {
    font-size: 0.78rem;
  }

  .dossier-desc-section {
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .dossier-desc {
    font-size: 0.82rem;
    line-height: 1.6;
    color: #e2e8f0;
    margin: 0;
  }
}

/* ==========================================================================
   Shared Breadcrumbs & Related Tools Hub (Phase 28)
   ========================================================================== */

/* Breadcrumbs */
.breadcrumbs-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
}

.breadcrumbs-sep {
  color: var(--border-medium);
  font-size: 0.72rem;
}

.breadcrumbs-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.breadcrumbs-link:hover {
  color: var(--text-primary);
}

.breadcrumbs-current {
  color: var(--text-muted);
  font-weight: 500;
}

/* Related Tools Section */
.related-tools-section {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.related-tools-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.related-tools-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.related-tools-title::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
}

.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.related-tool-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s var(--ease-craft);
  position: relative;
  overflow: hidden;
}

.related-tool-card:hover {
  transform: translateY(-2px);
  border-color: var(--text-muted);
  background: var(--bg-card-hover);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
}

.related-tool-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sharp);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.related-tool-card:hover .related-tool-icon {
  transform: scale(1.08);
}

.related-tool-info {
  flex: 1;
  min-width: 0;
}

.related-tool-name {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.related-tool-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
}

.related-tool-arrow {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: transform 0.15s ease, color 0.15s ease;
}

.related-tool-card:hover .related-tool-arrow {
  transform: translateX(3px);
  color: var(--text-primary);
}

/* Solar system specific dark overrides */
.solar-body .related-tools-section {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  max-width: 1200px;
  margin: 5rem auto 0;
  padding: 2.5rem 2rem 3.5rem;
  width: 100%;
  box-sizing: border-box;
  position: relative;
  z-index: 20;
}

.solar-body .related-tools-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

@media (max-width: 1024px) {
  .solar-body .related-tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .solar-body .related-tools-grid {
    grid-template-columns: 1fr;
  }
}

.solar-body .related-tool-card {
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #f8fafc;
}

.solar-body .related-tool-card:hover {
  background: rgba(30, 41, 59, 0.85);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.solar-body .related-tool-icon {
  background: rgba(30, 41, 59, 0.8);
  border-color: rgba(255, 255, 255, 0.15);
}

.solar-body .related-tool-name {
  color: #ffffff;
}

.solar-body .related-tool-desc {
  color: #94a3b8;
}

/* ==========================================================================
   Flagship Portal Design System Overhaul for kixking Portfolio (Phase 29)
   ========================================================================== */

:root {
  --hub-red: #EB0A1E;
  --hub-red-hover: #C80819;
  --hub-black: #111111;
  --hub-white: #ffffff;
  --hub-bg-body: #f7f7f7;
  --hub-bg-surface: #ffffff;
  --hub-border: #e5e5e5;
  --hub-border-subtle: #eeeeee;
  --hub-text-main: #111111;
  --hub-text-sub: #595959;
  --hub-text-muted: #888888;
  --hub-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --hub-font-en: "Plus Jakarta Sans", -apple-system, sans-serif;
}

[data-theme="dark"] {
  --hub-bg-body: #0c0c0d;
  --hub-bg-surface: #171719;
  --hub-border: #28282c;
  --hub-border-subtle: #202024;
  --hub-text-main: #f4f4f5;
  --hub-text-sub: #a1a1aa;
  --hub-text-muted: #71717a;
}

/* Body / Overall Layout */
body.hub-layout {
  display: block !important;
  width: 100% !important;
  min-height: 100vh;
  background-color: var(--hub-bg-body);
  color: var(--hub-text-main);
  font-family: var(--hub-font-sans);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.hub-container {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 1.5rem;
  box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   1. Two-Tier Header & Announcement
   -------------------------------------------------------------------------- */
.hub-header-wrapper {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--hub-bg-surface);
  border-bottom: 1px solid var(--hub-border);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

/* Upper Tier */
.hub-header-upper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 1.5rem;
  max-width: 1360px;
  margin: 0 auto;
}

.hub-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: var(--hub-text-main);
}

.hub-brand-logo {
  width: 38px;
  height: 38px;
  background: var(--hub-black);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--hub-font-en);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  border-radius: 0;
  position: relative;
}

.hub-brand-logo::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--hub-red);
}

[data-theme="dark"] .hub-brand-logo {
  background: #ffffff;
  color: #000000;
}

.hub-brand-text {
  display: flex;
  flex-direction: column;
}

.hub-brand-name {
  font-family: var(--hub-font-en);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.hub-brand-tagline {
  font-size: 0.72rem;
  color: var(--hub-text-sub);
  letter-spacing: 0.02em;
}

.hub-header-upper-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.hub-header-contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 1rem;
  background: transparent;
  border: 1px solid var(--hub-border);
  color: var(--hub-text-main);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0;
  transition: all 0.2s ease;
}

.hub-header-contact-btn:hover {
  background: var(--hub-text-main);
  color: var(--hub-bg-surface);
  border-color: var(--hub-text-main);
}

/* Lower Tier (Global Navigation) */
.hub-header-nav {
  border-top: 1px solid var(--hub-border-subtle);
  background: var(--hub-bg-surface);
}

.hub-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hub-nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.hub-nav-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--hub-text-main);
  text-decoration: none;
  position: relative;
  padding: 0.35rem 0;
  transition: color 0.15s ease;
}

.hub-nav-link:hover,
.hub-nav-link.active {
  color: var(--hub-red);
}

.hub-nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--hub-red);
}

/* Sub Announcement Bar */
.hub-sub-announce-bar {
  background: #ebebeb;
  border-bottom: 1px solid #dedede;
  padding: 0.45rem 1.5rem;
  font-size: 0.76rem;
  color: #444444;
  text-align: center;
}

[data-theme="dark"] .hub-sub-announce-bar {
  background: #1c1c1f;
  border-bottom: 1px solid #28282c;
  color: #a1a1aa;
}

/* --------------------------------------------------------------------------
   2. Full-Bleed Hero Carousel Slider
   -------------------------------------------------------------------------- */
.hub-hero-section {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #000000;
}

.hub-slider-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1);
  width: 400%;
}

.hub-slide {
  flex: 0 0 25%;
  width: 25%;
  min-height: 520px;
  position: relative;
  display: flex;
  align-items: center;
  color: #ffffff;
  box-sizing: border-box;
  padding: 4rem 3rem;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

@media (max-width: 768px) {
  .hub-slide {
    min-height: 440px;
    padding: 3rem 1.5rem;
  }
}

/* Slide 1: 3D Solar */
.hub-slide-1 {
  background: radial-gradient(circle at 75% 50%, rgba(20, 30, 70, 0.8), #030308 75%),
              linear-gradient(135deg, #050510 0%, #000000 100%);
}

/* Slide 2: WhatIsMyIP */
.hub-slide-2 {
  background: radial-gradient(circle at 75% 50%, rgba(13, 71, 161, 0.5), #020b1c 75%),
              linear-gradient(135deg, #03142e 0%, #010611 100%);
}

/* Slide 3: Android Apps */
.hub-slide-3 {
  background: radial-gradient(circle at 75% 50%, rgba(46, 125, 50, 0.4), #041407 75%),
              linear-gradient(135deg, #091c0f 0%, #010803 100%);
}

/* Slide 4: Mathematical Logic */
.hub-slide-4 {
  background: radial-gradient(circle at 75% 50%, rgba(194, 24, 91, 0.4), #19030e 75%),
              linear-gradient(135deg, #240514 0%, #070104 100%);
}

.hub-slide-content {
  max-width: 680px;
  position: relative;
  z-index: 2;
}

.hub-slide-tag {
  display: inline-block;
  font-family: var(--hub-font-en);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--hub-red);
  background: rgba(235, 10, 30, 0.12);
  border-left: 3px solid var(--hub-red);
  padding: 0.25rem 0.65rem;
  margin-bottom: 1.25rem;
}

.hub-slide-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem 0;
  color: #ffffff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
  .hub-slide-title {
    font-size: 2rem;
  }
}

.hub-slide-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: #cbd5e1;
  margin: 0 0 2rem 0;
}

.hub-slide-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-hub-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  background: var(--hub-red);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0;
  border: 1px solid var(--hub-red);
  transition: all 0.2s ease;
}

.btn-hub-hero-primary:hover {
  background: var(--hub-red-hover);
  border-color: var(--hub-red-hover);
  transform: translateY(-1px);
}

.btn-hub-hero-subtle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0;
  border: 1px solid rgba(255, 255, 255, 0.25);
  transition: all 0.2s ease;
}

.btn-hub-hero-subtle:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #ffffff;
}

/* Slider Controls (Prev / Next & Dots) */
.hub-slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 52px;
  height: 52px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all 0.2s ease;
}

.hub-slider-arrow:hover {
  background: rgba(0, 0, 0, 0.85);
  border-color: var(--hub-red);
}

.hub-slider-prev {
  left: 1rem;
}

.hub-slider-next {
  right: 1rem;
}

.hub-slider-dots {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 10;
}

.hub-dot {
  width: 14px;
  height: 14px;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.4);
  cursor: pointer;
  border-radius: 0;
  padding: 0;
  transition: all 0.2s ease;
}

.hub-dot.active {
  background: var(--hub-red);
  border-color: var(--hub-red);
}

/* --------------------------------------------------------------------------
   3. Important Notices & News Ticker
   -------------------------------------------------------------------------- */
.hub-ticker-section {
  background: var(--hub-bg-surface);
  border-bottom: 1px solid var(--hub-border);
  padding: 1.25rem 0;
}

.hub-ticker-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--hub-border-subtle);
}

.hub-ticker-row:last-child {
  border-bottom: none;
}

.hub-ticker-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex: 1;
  min-width: 0;
}

.hub-ticker-badge {
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 0;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  white-space: nowrap;
}

.hub-ticker-badge.badge-important {
  background: #fdf2f2;
  color: var(--hub-red);
  border: 1px solid rgba(235, 10, 30, 0.3);
}

[data-theme="dark"] .hub-ticker-badge.badge-important {
  background: rgba(235, 10, 30, 0.15);
  border-color: rgba(235, 10, 30, 0.4);
}

.hub-ticker-badge.badge-topics {
  background: #f0f4f8;
  color: #1e293b;
  border: 1px solid #cbd5e1;
}

[data-theme="dark"] .hub-ticker-badge.badge-topics {
  background: #1e293b;
  color: #94a3b8;
  border-color: #334155;
}

.hub-ticker-text {
  font-size: 0.88rem;
  color: var(--hub-text-main);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.15s ease;
}

.hub-ticker-text:hover {
  color: var(--hub-red);
}

.hub-ticker-more {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--hub-text-sub);
  text-decoration: none;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.15s ease;
}

.hub-ticker-more:hover {
  color: var(--hub-text-main);
}

/* --------------------------------------------------------------------------
   4. Lineup Section (Split Showcase style)
   -------------------------------------------------------------------------- */
.hub-lineup-section {
  padding: 4.5rem 0;
  background: var(--hub-bg-body);
}

.hub-section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.hub-section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem 0;
  color: var(--hub-text-main);
}

.hub-section-sub {
  font-size: 0.95rem;
  color: var(--hub-text-sub);
  max-width: 600px;
  margin: 0 auto;
}

/* Individual Showcase Card */
.hub-showcase-card {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  background: var(--hub-bg-surface);
  border: 1px solid var(--hub-border);
  margin-bottom: 3rem;
  border-radius: 0;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.hub-showcase-card:hover {
  border-color: #bbbbbb;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .hub-showcase-card:hover {
  border-color: #3f3f46;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

@media (max-width: 960px) {
  .hub-showcase-card {
    grid-template-columns: 1fr;
  }
}

.hub-showcase-info {
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-sizing: border-box;
}

@media (max-width: 768px) {
  .hub-showcase-info {
    padding: 2rem 1.5rem;
  }
}

.hub-model-category {
  font-family: var(--hub-font-en);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--hub-red);
  margin-bottom: 0.65rem;
}

.hub-model-name {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 1.25rem 0;
  color: var(--hub-text-main);
  letter-spacing: -0.01em;
}

.hub-model-bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem 0;
}

.hub-model-bullet-item {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.65rem;
  font-size: 0.92rem;
  color: var(--hub-text-sub);
  line-height: 1.5;
}

.hub-model-bullet-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 5px;
  height: 5px;
  background: var(--hub-red);
  border-radius: 0;
}

.hub-model-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-hub-solid {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  background: var(--hub-black);
  color: #ffffff;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0;
  border: 1px solid var(--hub-black);
  transition: all 0.2s ease;
}

[data-theme="dark"] .btn-hub-solid {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

.btn-hub-solid:hover {
  background: var(--hub-red);
  border-color: var(--hub-red);
  color: #ffffff;
}

.btn-hub-text {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--hub-text-main);
  text-decoration: none;
  transition: color 0.15s ease;
}

.btn-hub-text:hover {
  color: var(--hub-red);
}

/* Showcase Visual (Right Column) */
.hub-showcase-visual {
  position: relative;
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #111111;
}

.hub-visual-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hub-visual-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: rgba(0, 0, 0, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  z-index: 3;
}

/* --------------------------------------------------------------------------
   5. Related Services Grid
   -------------------------------------------------------------------------- */
.hub-services-section {
  padding: 4.5rem 0;
  background: var(--hub-bg-surface);
  border-top: 1px solid var(--hub-border);
}

.hub-services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.hub-service-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  background: var(--hub-bg-body);
  border: 1px solid var(--hub-border);
  text-decoration: none;
  color: inherit;
  border-radius: 0;
  transition: all 0.2s ease;
}

.hub-service-card:hover {
  border-color: var(--hub-text-main);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
}

.hub-service-icon {
  width: 44px;
  height: 44px;
  background: var(--hub-bg-surface);
  border: 1px solid var(--hub-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.hub-service-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hub-text-main);
  margin: 0 0 0.4rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hub-service-desc {
  font-size: 0.85rem;
  color: var(--hub-text-sub);
  line-height: 1.5;
  margin: 0;
}

/* --------------------------------------------------------------------------
   6. Official Footer
   -------------------------------------------------------------------------- */
.hub-footer {
  background: #0f0f11;
  color: #999999;
  padding: 4rem 0 2.5rem;
  font-size: 0.82rem;
  border-top: 3px solid var(--hub-red);
}

.hub-footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 900px) {
  .hub-footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.hub-footer-col-title {
  font-family: var(--hub-font-en);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ffffff;
  margin-bottom: 1.25rem;
}

.hub-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hub-footer-link-item {
  margin-bottom: 0.65rem;
}

.hub-footer-link {
  color: #a1a1aa;
  text-decoration: none;
  transition: color 0.15s ease;
}

.hub-footer-link:hover {
  color: #ffffff;
}

.hub-footer-sns {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-top: 1rem;
}

.hub-sns-icon {
  width: 36px;
  height: 36px;
  background: #1f1f23;
  border: 1px solid #333338;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  text-decoration: none;
  transition: all 0.15s ease;
}

.hub-sns-icon:hover {
  background: var(--hub-red);
  border-color: var(--hub-red);
}

.hub-footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid #222226;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.hub-footer-legal-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.hub-footer-legal-links a {
  color: #71717a;
  text-decoration: none;
  transition: color 0.15s ease;
}

.hub-footer-legal-links a:hover {
  color: #cccccc;
}

.hub-copyright {
  color: #71717a;
  font-size: 0.78rem;
}

/* --------------------------------------------------------------------------
   7. Floating Contact Widget
   -------------------------------------------------------------------------- */
.hub-floating-widget {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 990;
}

.hub-widget-circle-btn {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--hub-black);
  border: 2px solid #ffffff;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25);
  transition: all 0.2s ease;
  padding: 0;
}

[data-theme="dark"] .hub-widget-circle-btn {
  background: #ffffff;
  color: #000000;
  border-color: #27272a;
}

.hub-widget-circle-btn:hover {
  background: var(--hub-red);
  border-color: var(--hub-red);
  color: #ffffff;
  transform: scale(1.06);
}

.hub-widget-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.hub-widget-lbl {
  font-size: 0.62rem;
  font-weight: 700;
  margin-top: 0.2rem;
  letter-spacing: -0.02em;
}

/* Floating Contact Modal */
.hub-contact-modal {
  position: fixed;
  inset: 0;
  z-index: 1050;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.hub-contact-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.hub-contact-dialog {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 480px;
  background: var(--hub-bg-surface);
  border: 1px solid var(--hub-border);
  padding: 2rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.hub-dialog-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 1rem 0;
  color: var(--hub-text-main);
}

.hub-dialog-body {
  font-size: 0.92rem;
  color: var(--hub-text-sub);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.hub-dialog-actions {
  display: flex;
  gap: 1rem;
}

/* --------------------------------------------------------------------------
   8. Mobile Responsive Refinements
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .hub-header-upper {
    height: 56px;
    padding: 0 1rem;
  }

  .hub-brand-tagline {
    display: none;
  }

  .hub-header-contact-btn span {
    display: none;
  }

  .hub-header-contact-btn {
    padding: 0.4rem 0.65rem;
  }

  .hub-header-upper-right {
    gap: 0.65rem;
  }

  .hub-header-nav {
    overflow: hidden;
  }

  .hub-nav-inner {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 0 1rem;
  }

  .hub-nav-inner::-webkit-scrollbar {
    display: none;
  }

  .hub-nav-links {
    gap: 1.25rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .hub-nav-clock {
    display: none !important;
  }

  .hub-slider-arrow {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
    opacity: 0.4;
  }

  .hub-slide-title {
    font-size: 1.85rem;
  }

  .hub-floating-widget {
    bottom: 1.25rem;
    right: 1.25rem;
  }

  .hub-widget-circle-btn {
    width: 56px;
    height: 56px;
  }
}

/* ==========================================================================
   X (Twitter) Advanced Search Operator Generator Styles (Phase 34)
   ========================================================================== */

body.xsearch-body .site-container {
  max-width: 820px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
}

body.xsearch-body .profile-header {
  max-width: 100%;
}

.xsearch-container {
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0;
}

/* 1. Quick Presets Scroll Bar */
.xsearch-preset-section {
  margin-bottom: 1.5rem;
}

.xsearch-section-label {
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

.xsearch-presets-scroll {
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  padding: 0.2rem 0.2rem 0.6rem;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.xsearch-presets-scroll::-webkit-scrollbar {
  height: 4px;
}

.xsearch-presets-scroll::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

.xsearch-preset-chip {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  font-family: inherit;
}

.xsearch-preset-chip:hover {
  background: var(--bg-hover);
  border-color: #1d9bf0;
  transform: translateY(-1px);
}

.xsearch-preset-chip.active {
  background: #1d9bf0;
  color: #ffffff;
  border-color: #1d9bf0;
  box-shadow: 0 4px 12px rgba(29, 155, 240, 0.35);
}

/* 2. Main Builder Card (1-Column Direct Flow) */
.xsearch-builder-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem 2rem 1.75rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  box-sizing: border-box;
}

.xsearch-field-block {
  margin-bottom: 1.75rem;
}

.xsearch-field-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.xsearch-field-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.xsearch-num-badge {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #1d9bf0;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.76rem;
  font-weight: 800;
  flex-shrink: 0;
}

.xsearch-field-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Search Bar Wrapper */
.xsearch-searchbar-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--bg-body);
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 0.35rem 0.85rem;
  transition: all 0.2s ease;
}

.xsearch-searchbar-wrapper:focus-within {
  border-color: #1d9bf0;
  box-shadow: 0 0 0 4px rgba(29, 155, 240, 0.15);
}

@keyframes searchShake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}

.xsearch-searchbar-wrapper.search-hint-shake {
  animation: searchShake 0.4s ease-in-out;
  border-color: #f59e0b !important;
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.25) !important;
}

.xsearch-searchbar-icon {
  font-size: 1.2rem;
  margin-right: 0.65rem;
  opacity: 0.65;
  flex-shrink: 0;
}

.xsearch-searchbar-input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-main);
  font-size: 1.15rem;
  font-weight: 600;
  padding: 0.6rem 0;
  outline: none;
  width: 100%;
  font-family: inherit;
}

.xsearch-searchbar-input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
  font-size: 0.95rem;
  font-weight: 400;
}

.xsearch-clear-btn {
  border: none;
  background: var(--bg-subtle, rgba(0,0,0,0.06));
  color: var(--text-muted);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
  margin-left: 0.5rem;
}

.xsearch-clear-btn:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}

/* Filter Rows */
.xsearch-filter-row {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border-subtle);
}

.xsearch-filter-row.highlight-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  background: rgba(29, 155, 240, 0.05);
  padding: 0.9rem 1.15rem;
  border-radius: 10px;
  border: 1px solid rgba(29, 155, 240, 0.2);
  margin: 0.65rem 0;
}

.xsearch-filter-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.xsearch-filter-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
}

.xsearch-filter-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

.xsearch-filter-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* Pill Groups */
.xsearch-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.xsearch-pill {
  border: 1px solid var(--border-color);
  background: var(--bg-body);
  color: var(--text-main);
  padding: 0.44rem 0.9rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
  user-select: none;
}

.xsearch-pill:hover {
  border-color: #1d9bf0;
  color: #1d9bf0;
  background: rgba(29, 155, 240, 0.04);
  transform: translateY(-1px);
}

.xsearch-pill.active {
  background: #1d9bf0;
  border-color: #1d9bf0;
  color: #ffffff;
  box-shadow: 0 3px 8px rgba(29, 155, 240, 0.3);
  font-weight: 700;
}

.xsearch-custom-input-wrap {
  display: inline-flex;
  align-items: center;
}

.xsearch-pill-input {
  width: 95px;
  padding: 0.42rem 0.65rem;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  background: var(--bg-body);
  color: var(--text-main);
  font-size: 0.82rem;
  font-family: 'JetBrains Mono', monospace;
  text-align: center;
  box-sizing: border-box;
  transition: all 0.2s;
}

.xsearch-pill-input:focus {
  border-color: #1d9bf0;
  border-style: solid;
  outline: none;
  box-shadow: 0 0 0 3px rgba(29, 155, 240, 0.15);
}

/* Date Drawer */
.xsearch-date-drawer {
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem 1.15rem;
  margin-top: 0.75rem;
}

.date-input-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

/* Accordion (Advanced Options) */
.xsearch-accordion {
  margin-top: 0.9rem;
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  overflow: hidden;
}

.xsearch-accordion-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.1rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: all 0.15s;
  font-family: inherit;
}

.xsearch-accordion-toggle:hover {
  color: var(--text-main);
  background: var(--bg-hover);
}

.acc-chevron {
  font-size: 0.7rem;
  transition: transform 0.2s ease;
}

.acc-chevron.expanded {
  transform: rotate(180deg);
}

.xsearch-accordion-body {
  padding: 1.15rem;
  background: var(--bg-body);
  border-top: 1px solid var(--border-color);
}

/* General Form Elements */
.form-group {
  margin-bottom: 1rem;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.xsearch-input {
  width: 100%;
  box-sizing: border-box;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
  transition: all 0.2s ease;
}

.xsearch-input:focus {
  outline: none;
  border-color: #1d9bf0;
  box-shadow: 0 0 0 3px rgba(29, 155, 240, 0.15);
}

.input-with-prefix {
  display: flex;
  align-items: center;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-card);
  overflow: hidden;
}

.input-with-prefix:focus-within {
  border-color: #1d9bf0;
  box-shadow: 0 0 0 3px rgba(29, 155, 240, 0.15);
}

.input-prefix {
  padding: 0 0.6rem 0 0.85rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  user-select: none;
}

.xsearch-input.with-prefix {
  border: none;
  padding-left: 0;
  background: transparent;
}

.xsearch-input.with-prefix:focus {
  box-shadow: none;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 42px;
  height: 24px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--border-color);
  transition: 0.25s;
  border-radius: 24px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.25s;
  border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
  background-color: #1d9bf0;
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(18px);
}

/* 3. Action & Output Section */
.xsearch-action-section {
  margin-top: 2rem;
  padding-top: 1.75rem;
  border-top: 2px dashed var(--border-color);
}

.xsearch-mode-tabs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.mode-tab-label {
  font-size: 0.84rem;
  color: var(--text-muted);
  font-weight: 600;
}

.xsearch-tab-pill {
  border: 1px solid var(--border-color);
  background: var(--bg-body);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.xsearch-tab-pill.active {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: var(--text-muted);
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Giant Primary CTA Button */
.btn-xsearch-huge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  background: linear-gradient(135deg, #1d9bf0 0%, #0a80cc 100%);
  color: #ffffff;
  text-decoration: none;
  padding: 1.15rem 1.5rem;
  border-radius: 14px;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow: 0 8px 24px rgba(29, 155, 240, 0.4);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  border: none;
  box-sizing: border-box;
  text-shadow: 0 1px 2px rgba(0,0,0,0.15);
}

.btn-xsearch-huge:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(29, 155, 240, 0.55);
  filter: brightness(1.04);
}

.btn-xsearch-huge:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(29, 155, 240, 0.3);
}

.btn-xsearch-huge-text {
  font-family: inherit;
}

.btn-arrow {
  font-size: 1.3rem;
  transition: transform 0.2s ease;
}

.btn-xsearch-huge:hover .btn-arrow {
  transform: translate(2px, -2px);
}

/* Output Code Wrap */
.xsearch-output-wrap {
  margin-top: 1.5rem;
}

.xsearch-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.xsearch-code-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.xsearch-code-actions {
  display: flex;
  gap: 0.4rem;
}

.btn-code-action {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-body);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

.btn-code-action:hover {
  color: var(--text-main);
  border-color: var(--text-muted);
  background: var(--bg-hover);
}

.xsearch-code-display {
  background: #090a0f;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.95rem;
  line-height: 1.6;
  min-height: 52px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  color: #f8fafc;
  word-break: break-all;
  box-sizing: border-box;
}

.query-empty-placeholder {
  color: #64748b;
  font-size: 0.88rem;
  font-style: italic;
}

/* Syntax Highlighting Tokens */
.q-op { color: #38bdf8; font-weight: 700; }
.q-val { color: #facc15; }
.q-neg { color: #f87171; }
.q-quote { color: #a3e635; }
.q-word { color: #ffffff; }

/* Tip Box */
.xsearch-tip-box {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin-top: 1.5rem;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.xsearch-tip-box .tip-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
  line-height: 1.3;
}

.xsearch-tip-box strong {
  color: var(--text-main);
}

/* Related Tools and Footer */
body.xsearch-body .related-tools-section {
  max-width: 100%;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

body.xsearch-body .related-tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

@media (min-width: 768px) {
  body.xsearch-body .related-tools-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 540px) {
  body.xsearch-body .related-tools-grid {
    grid-template-columns: 1fr;
  }
}

body.xsearch-body .profile-footer {
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 768px) {
  body.xsearch-body .site-container {
    padding: 1.75rem 1rem 3.5rem;
  }

  .xsearch-builder-card {
    padding: 1.25rem 1rem;
    border-radius: 12px;
  }

  .xsearch-searchbar-input {
    font-size: 1rem;
  }

  .btn-xsearch-huge {
    font-size: 1.05rem;
    padding: 1rem 1.25rem;
  }

  .date-input-grid {
    grid-template-columns: 1fr;
  }

  body.xsearch-body .profile-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}