/* ==========================================================================
   Claude Opus 5.5 · 100 HTML Masterpieces Showcase & Laboratory
   Design System: Midnight Cosmic Glassmorphism + Holographic Accents
   ========================================================================== */

:root {
  --bg-dark: #070b19;
  --bg-surface: rgba(15, 23, 42, 0.72);
  --bg-card: rgba(18, 26, 47, 0.65);
  --bg-card-hover: rgba(24, 34, 62, 0.85);
  --bg-elevated: rgba(30, 41, 69, 0.88);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-glow: rgba(45, 226, 196, 0.35);

  --accent-teal: #2de2c4;
  --accent-violet: #7b5cff;
  --accent-rose: #ff477e;
  --accent-amber: #f59e0b;
  --accent-blue: #38bdf8;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 32px -8px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border-subtle);
  --shadow-glow: 0 0 25px rgba(45, 226, 196, 0.18);
  --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 25, 0.8);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  cursor: pointer;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, rgba(45, 226, 196, 0.2), rgba(123, 92, 255, 0.3));
  border: 1px solid var(--accent-teal);
  border-radius: var(--radius-md);
  box-shadow: 0 0 15px rgba(45, 226, 196, 0.3);
  font-weight: 800;
  font-size: 18px;
  color: var(--accent-teal);
}

.brand-info h1 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, #ffffff 40%, var(--accent-teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-tagline {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.header-center {
  flex: 1;
  max-width: 440px;
  position: relative;
}

.search-bar {
  position: relative;
  width: 100%;
}

.search-bar input {
  width: 100%;
  background: rgba(18, 26, 47, 0.7);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  padding: 9px 42px 9px 38px;
  color: var(--text-main);
  font-size: 13.5px;
  outline: none;
  transition: var(--transition-smooth);
}

.search-bar input:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(45, 226, 196, 0.15);
  background: rgba(22, 32, 58, 0.9);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  color: var(--text-dim);
  pointer-events: none;
}

.search-shortcut {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 11px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--text-dim);
  pointer-events: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 550;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-nav:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.btn-nav.active {
  background: linear-gradient(135deg, rgba(45, 226, 196, 0.2), rgba(123, 92, 255, 0.25));
  border-color: var(--accent-teal);
  color: #fff;
  box-shadow: 0 0 12px rgba(45, 226, 196, 0.2);
}

.btn-sound {
  width: 36px;
  height: 36px;
  padding: 0;
  justify-content: center;
  border-radius: 50%;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-wrap {
  position: relative;
  z-index: 10;
  max-width: 1280px;
  margin: 0 auto;
  padding: 44px 24px 28px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(45, 226, 196, 0.1);
  border: 1px solid rgba(45, 226, 196, 0.3);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--accent-teal);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 18px;
  box-shadow: 0 0 15px rgba(45, 226, 196, 0.15);
}

.hero-pill .pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(45, 226, 196, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 7px rgba(45, 226, 196, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(45, 226, 196, 0); }
}

.hero-title {
  font-size: clamp(32px, 5.5vw, 56px);
  font-weight: 850;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero-title span {
  background: linear-gradient(135deg, #ffffff 30%, #a5b4fc 60%, var(--accent-teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  max-width: 68ch;
  margin: 0 auto 28px;
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

.hero-metrics {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 10px;
}

.metric-tag {
  background: rgba(18, 26, 47, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 12.5px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.metric-tag b {
  color: var(--accent-teal);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ==========================================================================
   Category & Tech Filter Pills
   ========================================================================== */
.filter-container {
  position: sticky;
  top: 63px;
  z-index: 90;
  background: rgba(7, 11, 25, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 24px;
}

.filter-wrap {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.category-scroll {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}
.category-scroll::-webkit-scrollbar { display: none; }

.cat-btn {
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 550;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cat-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border-color: var(--border-strong);
}

.cat-btn.active {
  background: linear-gradient(135deg, rgba(45, 226, 196, 0.22), rgba(123, 92, 255, 0.25));
  border-color: var(--accent-teal);
  color: #fff;
  font-weight: 650;
  box-shadow: 0 0 12px rgba(45, 226, 196, 0.25);
}

.cat-btn .count-badge {
  background: rgba(0, 0, 0, 0.25);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  font-size: 10.5px;
  font-variant-numeric: tabular-nums;
  opacity: 0.8;
}

.tech-filter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.tech-tags {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.tech-tag-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-dim);
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.tech-tag-btn:hover {
  color: var(--text-main);
  border-color: var(--border-strong);
}

.tech-tag-btn.active {
  border-color: var(--accent-violet);
  background: rgba(123, 92, 255, 0.15);
  color: #c7d2fe;
}

.gallery-stats {
  font-size: 12px;
  color: var(--text-dim);
}

.gallery-stats b {
  color: var(--accent-teal);
}

/* ==========================================================================
   Main Bento / Card Grid
   ========================================================================== */
.main-content {
  position: relative;
  z-index: 10;
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 24px 80px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

/* 3D Holographic Card */
.case-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease-out, border-color 0.25s, box-shadow 0.25s;
  transform-style: preserve-3d;
  will-change: transform;
}

.case-card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.7), 0 0 20px rgba(45, 226, 196, 0.16);
}

/* Specular reflection glare */
.case-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  pointer-events: none;
  background: radial-gradient(circle at var(--gx, 50%) var(--gy, 50%), rgba(255, 255, 255, 0.12) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}

.case-card:hover::after {
  opacity: 1;
}

.card-thumb-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #0d1222;
  overflow: hidden;
  cursor: pointer;
}

.card-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.case-card:hover .card-thumb-wrap img {
  transform: scale(1.035);
}

.card-overlay-btn {
  position: absolute;
  inset: 0;
  background: rgba(7, 11, 25, 0.45);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.case-card:hover .card-overlay-btn {
  opacity: 1;
}

.btn-play-preview {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent-teal), #0e947d);
  color: #061e18;
  font-weight: 700;
  font-size: 13px;
  padding: 10px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 18px rgba(45, 226, 196, 0.5);
  transform: translateY(6px);
  transition: transform 0.2s ease;
}

.case-card:hover .btn-play-preview {
  transform: translateY(0);
}

.card-badge-row {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.card-id-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-teal);
  background: rgba(7, 11, 25, 0.85);
  border: 1px solid rgba(45, 226, 196, 0.4);
  padding: 3px 8px;
  border-radius: 6px;
  backdrop-filter: blur(8px);
}

.card-cat-pill {
  font-size: 11px;
  color: #fff;
  background: rgba(7, 11, 25, 0.85);
  border: 1px solid var(--border-subtle);
  padding: 3px 9px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-body {
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-title-group {
  margin-bottom: 8px;
}

.card-title-cn {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 3px;
  cursor: pointer;
  transition: color 0.15s;
}

.card-title-cn:hover {
  color: var(--accent-teal);
}

.card-title-en {
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-summary {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-highlight-box {
  background: rgba(255, 255, 255, 0.03);
  border-left: 2px solid var(--accent-teal);
  padding: 6px 10px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 11.5px;
  color: #cbd5e1;
  margin-bottom: 14px;
  line-height: 1.45;
}

.card-highlight-box b {
  color: var(--accent-teal);
  font-weight: 600;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: auto;
  margin-bottom: 14px;
}

.card-tag {
  font-size: 10.5px;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-dim);
  padding: 2px 7px;
  border-radius: 4px;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  gap: 8px;
}

.btn-card-action {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.btn-card-action:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
  border-color: var(--border-strong);
}

.btn-card-action.primary {
  background: rgba(45, 226, 196, 0.12);
  color: var(--accent-teal);
  border-color: rgba(45, 226, 196, 0.3);
}

.btn-card-action.primary:hover {
  background: var(--accent-teal);
  color: #041813;
  box-shadow: 0 4px 14px rgba(45, 226, 196, 0.4);
}

/* ==========================================================================
   Full Sandbox Runner Modal & Device Frames
   ========================================================================== */
.sandbox-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(4, 6, 15, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.sandbox-modal.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-header {
  height: 58px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(10, 16, 33, 0.95);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  gap: 16px;
  flex: none;
}

.modal-title-box {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.modal-case-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-teal);
  background: rgba(45, 226, 196, 0.12);
  border: 1px solid rgba(45, 226, 196, 0.3);
  padding: 3px 8px;
  border-radius: 6px;
}

.modal-title-text {
  font-size: 15px;
  font-weight: 650;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Device Viewport Switcher */
.device-toggles {
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.device-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 550;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.device-btn:hover {
  color: var(--text-main);
}

.device-btn.active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.modal-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-tool-btn {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.modal-tool-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-main);
}

.modal-tool-btn.close-btn {
  background: rgba(255, 71, 126, 0.12);
  border-color: rgba(255, 71, 126, 0.3);
  color: var(--accent-rose);
}
.modal-tool-btn.close-btn:hover {
  background: var(--accent-rose);
  color: #fff;
}

/* Modal Body Split View */
.modal-body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.stage-viewport {
  flex: 1;
  background: #03060f;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow: auto;
  position: relative;
}

/* Device Mockups */
.frame-wrapper {
  position: relative;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

/* Desktop 100% */
.frame-wrapper.desktop {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
}

.desktop-titlebar {
  height: 32px;
  background: #111625;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 7px;
  flex: none;
}

.mac-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.mac-dot.red { background: #ff5f56; }
.mac-dot.yellow { background: #ffbd2e; }
.mac-dot.green { background: #27c93f; }

/* Tablet iPad Frame */
.frame-wrapper.tablet {
  width: 768px;
  height: 92%;
  border-radius: 28px;
  border: 12px solid #1a2030;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1), 0 25px 70px rgba(0, 0, 0, 0.85);
}

/* Mobile iPhone 15 Pro Frame */
.frame-wrapper.mobile {
  width: 390px;
  height: 844px;
  max-height: 94%;
  border-radius: 46px;
  border: 12px solid #1b2133;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.15), 0 25px 70px rgba(0, 0, 0, 0.9);
  position: relative;
}

.mobile-dynamic-island {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 28px;
  background: #000;
  border-radius: var(--radius-full);
  z-index: 10;
  pointer-events: none;
}

.sandbox-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #000;
  display: block;
}

/* Sidebar Anatomy Drawer */
.modal-drawer {
  width: 440px;
  background: rgba(14, 21, 40, 0.96);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex: none;
  overflow: hidden;
}

.drawer-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(8, 12, 24, 0.6);
}

.drawer-tab {
  flex: 1;
  padding: 12px 10px;
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border-bottom: 2px solid transparent;
  text-align: center;
}

.drawer-tab:hover {
  color: var(--text-main);
}

.drawer-tab.active {
  color: var(--accent-teal);
  border-bottom-color: var(--accent-teal);
  background: rgba(45, 226, 196, 0.05);
}

.drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.section-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.section-box h3 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-teal);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.section-box p {
  font-size: 13.5px;
  color: #cbd5e1;
  line-height: 1.6;
}

.code-pre-box {
  position: relative;
  background: #070a14;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #a5b4fc;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 380px;
}

.btn-copy-code {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-smooth);
}
.btn-copy-code:hover {
  background: var(--accent-teal);
  color: #051a14;
}

/* ==========================================================================
   Prompt Craft Studio (借鉴工坊) & Upload Lab
   ========================================================================== */
.studio-container, .upload-container {
  display: none;
  animation: fadeIn 0.3s ease;
}

.studio-container.active, .upload-container.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.lego-builder-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 20px;
}

@media (max-width: 900px) {
  .lego-builder-grid { grid-template-columns: 1fr; }
  .modal-drawer { width: 100%; height: 45%; }
  .modal-body { flex-direction: column; }
}

.lego-card-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lego-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.lego-card-header {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.lego-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
}

.lego-option-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text-muted);
  text-align: left;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.lego-option-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
}

.lego-option-btn.selected {
  border-color: var(--accent-teal);
  background: rgba(45, 226, 196, 0.12);
  color: #fff;
  font-weight: 600;
}

.prompt-output-card {
  position: sticky;
  top: 130px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-lg);
}

/* Upload Lab Dropzone */
.dropzone-box {
  border: 2px dashed rgba(45, 226, 196, 0.4);
  border-radius: var(--radius-lg);
  background: rgba(45, 226, 196, 0.03);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.dropzone-box:hover, .dropzone-box.drag-over {
  border-color: var(--accent-teal);
  background: rgba(45, 226, 196, 0.08);
  box-shadow: 0 0 25px rgba(45, 226, 196, 0.2);
}

.dropzone-icon {
  width: 52px;
  height: 52px;
  color: var(--accent-teal);
  margin-bottom: 14px;
}

/* Form Styles */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-group label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
}

.form-input, .form-textarea {
  background: rgba(18, 26, 47, 0.8);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: #fff;
  font-size: 13.5px;
  font-family: inherit;
  outline: none;
  transition: var(--transition-smooth);
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 0 3px rgba(45, 226, 196, 0.15);
}

.btn-primary-large {
  background: linear-gradient(135deg, var(--accent-teal), #0d9488);
  color: #041813;
  font-weight: 750;
  font-size: 14px;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: 0 6px 20px rgba(45, 226, 196, 0.35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary-large:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(45, 226, 196, 0.5);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--accent-teal);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 15px rgba(45, 226, 196, 0.3);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  color: #fff;
  font-size: 13.5px;
  display: flex;
  align-items: center;
  gap: 10px;
  backdrop-filter: blur(16px);
  animation: slideInUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ==========================================================================
   Hero Centerpiece: Live Showcase Stage (实际效果大舞台)
   ========================================================================== */
.live-stage-wrap {
  max-width: 1280px;
  margin: 12px auto 36px;
  padding: 0 24px;
  position: relative;
  z-index: 15;
}

.live-stage-card {
  background: rgba(13, 18, 36, 0.9);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.75), 0 0 30px rgba(45, 226, 196, 0.15);
  display: flex;
  flex-direction: column;
}

.live-stage-header {
  padding: 14px 20px;
  background: rgba(8, 12, 26, 0.92);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.live-stage-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(45, 226, 196, 0.12);
  border: 1px solid rgba(45, 226, 196, 0.4);
  color: var(--accent-teal);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.live-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-teal);
  animation: pulse-ring 1.8s infinite;
}

.live-stage-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  padding: 3px 8px;
  border-radius: 6px;
}

.live-stage-title {
  font-size: 16px;
  font-weight: 750;
  color: #fff;
  letter-spacing: -0.01em;
}

.live-stage-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.stage-nav-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.stage-nav-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-strong);
}

.stage-nav-btn.primary {
  background: linear-gradient(135deg, rgba(45, 226, 196, 0.25), rgba(123, 92, 255, 0.3));
  border-color: var(--accent-teal);
  color: #fff;
}

.stage-nav-btn.primary:hover {
  background: var(--accent-teal);
  color: #041813;
  box-shadow: 0 4px 14px rgba(45, 226, 196, 0.4);
}

.stage-quick-pills {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: rgba(10, 15, 32, 0.6);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  scrollbar-width: none;
}
.stage-quick-pills::-webkit-scrollbar { display: none; }

.quick-pill-btn {
  white-space: nowrap;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.quick-pill-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: var(--border-strong);
}

.quick-pill-btn.active {
  background: rgba(45, 226, 196, 0.15);
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  font-weight: 600;
}

.stage-iframe-container {
  width: 100%;
  height: 520px;
  background: #020308;
  position: relative;
  overflow: hidden;
}

.hero-live-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background: #020308;
  display: block;
}

.live-stage-footer {
  padding: 12px 20px;
  background: rgba(8, 12, 26, 0.95);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: #cbd5e1;
  flex-wrap: wrap;
}

.stage-footer-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.stage-footer-item b {
  color: var(--accent-teal);
  font-weight: 650;
}

/* Card Live Mode Styles */
.card-live-iframe {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  transform: scale(0.5);
  transform-origin: 0 0;
  border: none;
  background: #000;
  z-index: 5;
}

.card-thumb-wrap.is-live img {
  display: none;
}

.card-thumb-wrap.is-live .card-live-iframe {
  display: block;
}

.card-thumb-wrap.is-live .card-overlay-btn {
  display: none;
}

/* Hover-to-Live Global Toggle */
.live-toggle-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  user-select: none;
  transition: var(--transition-smooth);
}

.live-toggle-wrap:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-strong);
}

.live-toggle-wrap input {
  display: none;
}

.live-toggle-slider {
  width: 28px;
  height: 16px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-full);
  position: relative;
  transition: var(--transition-smooth);
}

.live-toggle-slider::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  background: #fff;
  border-radius: 50%;
  transition: var(--transition-smooth);
}

.live-toggle-wrap input:checked + .live-toggle-slider {
  background: var(--accent-teal);
}

.live-toggle-wrap input:checked + .live-toggle-slider::after {
  transform: translateX(12px);
  background: #051a14;
}

.live-toggle-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
}

.live-toggle-wrap input:checked ~ .live-toggle-label {
  color: var(--accent-teal);
}