/* ==========================================================================
   LLM.SH.CN Design System & Core Styles
   Modern Dark Tech Minimalist Theme
   ========================================================================== */

:root {
  --bg-main: #07090E;
  --bg-card: rgba(15, 20, 32, 0.75);
  --bg-card-hover: rgba(22, 29, 46, 0.85);
  --bg-card-solid: #0F1422;
  --bg-input: rgba(10, 14, 24, 0.85);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.35);
  --border-active: #6366F1;
  
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-accent: #38BDF8;
  
  --primary-cyan: #06B6D4;
  --primary-indigo: #6366F1;
  --primary-purple: #A855F7;
  --primary-emerald: #10B981;
  
  --gradient-brand: linear-gradient(135deg, #06B6D4 0%, #6366F1 50%, #A855F7 100%);
  --gradient-text: linear-gradient(135deg, #FFFFFF 20%, #94A3B8 60%, #38BDF8 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", Menlo, Monaco, Consolas, monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px -10px rgba(99, 102, 241, 0.35);
  --transition-normal: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset & Smoothness */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  overflow-x: hidden;
  max-width: 100vw;
  width: 100%;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

body {
  position: relative;
  min-height: 100vh;
}

/* Ambient Background Layer strictly contained */
.ambient-layer {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

#bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.85;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 20%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 20%, #000 30%, transparent 80%);
  pointer-events: none;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  opacity: 0.4;
}

.glow-orb-1 {
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: min(600px, 90vw);
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, rgba(6, 182, 212, 0.2) 60%, transparent 80%);
}

.glow-orb-2 {
  top: 1400px;
  left: 5%;
  width: min(500px, 80vw);
  height: 400px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.25) 0%, transparent 70%);
}

.glow-orb-3 {
  top: 2800px;
  right: 5%;
  width: min(600px, 85vw);
  height: 450px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.2) 0%, transparent 70%);
}

/* Layout Container */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: var(--transition-normal);
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(7, 9, 14, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar.scrolled {
  background: rgba(7, 9, 14, 0.94);
  border-bottom-color: rgba(99, 102, 241, 0.25);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.5px;
  line-height: 1;
}

.brand-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-icon img {
  display: block;
}

.brand-text {
  display: flex;
  align-items: center;
  line-height: 1;
}

.brand-text span {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  transition: var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  line-height: 1.4;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

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

/* Language Switcher Capsule */
.lang-switch {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 2px;
  height: 32px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-normal);
  line-height: 1;
}

.lang-btn:hover {
  color: var(--text-secondary);
}

.lang-btn.active {
  background: rgba(99, 102, 241, 0.25);
  color: #FFFFFF;
  border: 1px solid rgba(99, 102, 241, 0.5);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

/* Mobile Menu Toggle & Drawer (Hidden on Desktop) */
.mobile-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  transition: var(--transition-normal);
  padding: 0;
}

.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.mobile-nav {
  display: none !important;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
  border: 1px solid transparent;
  line-height: 1;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-subtle);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3px;
}

.badge-glow {
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: #A5B4FC;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary-emerald);
  box-shadow: 0 0 8px var(--primary-emerald);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding-top: 120px;
  padding-bottom: 80px;
  text-align: center;
  position: relative;
}

.hero-content {
  max-width: 860px;
  margin: 0 auto;
}

.hero-tagline {
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero-title-highlight {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-desc {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  background: rgba(15, 20, 34, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(12px);
  margin-top: 20px;
}

.metric-item {
  text-align: center;
  position: relative;
}

.metric-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-subtle);
}

.metric-number {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  background: linear-gradient(180deg, #FFFFFF 0%, #A5B4FC 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.metric-label {
  font-size: 13px;
  color: var(--text-muted);
}

/* Section Header Typography */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-subtitle {
  color: var(--primary-cyan);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Bento Grid Feature Section
   ========================================================================== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.bento-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

/* Card Spotlight Follow Effect */
.bento-card::before {
  content: "";
  position: absolute;
  top: var(--mouse-y, -1000px);
  left: var(--mouse-x, -1000px);
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  pointer-events: none;
  transition: opacity 0.3s;
  opacity: 0;
}

.bento-card:hover::before {
  opacity: 1;
}

.bento-span-2 {
  grid-column: span 2;
}

.card-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #818CF8;
}

.card-icon-box.cyan {
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.25);
  color: var(--primary-cyan);
}

.card-icon-box.purple {
  background: rgba(168, 85, 247, 0.1);
  border-color: rgba(168, 85, 247, 0.25);
  color: var(--primary-purple);
}

.card-icon-box.emerald {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.25);
  color: var(--primary-emerald);
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-badge {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

/* ==========================================================================
   Live Interactive LLM Playground
   ========================================================================== */
.playground-box {
  background: #0B0F19;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.playground-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(15, 20, 32, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 16px;
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background: #EF4444; }
.dot-yellow { background: #F59E0B; }
.dot-green { background: #10B981; }

.playground-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.model-select {
  background: var(--bg-card-solid);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 13px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
  font-family: var(--font-sans);
}

.model-select:focus {
  border-color: var(--primary-indigo);
}

.scenario-pills {
  display: flex;
  gap: 8px;
}

.pill-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-normal);
}

.pill-btn:hover,
.pill-btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.4);
  color: #A5B4FC;
}

.playground-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 380px;
}

.playground-input-pane {
  padding: 24px;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
}

.pane-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
}

.prompt-textarea {
  width: 100%;
  flex-grow: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  resize: none;
  outline: none;
  min-height: 160px;
}

.prompt-textarea::placeholder {
  color: #475569;
}

.input-pane-footer {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.playground-output-pane {
  padding: 24px;
  background: rgba(8, 11, 19, 0.5);
  display: flex;
  flex-direction: column;
  position: relative;
}

.output-content {
  flex-grow: 1;
  font-size: 14px;
  line-height: 1.7;
  color: #E2E8F0;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 280px;
  overflow-y: auto;
  font-family: var(--font-mono);
}

.cursor-blink {
  display: inline-block;
  width: 7px;
  height: 15px;
  background-color: var(--primary-cyan);
  vertical-align: middle;
  margin-left: 4px;
  animation: blink 0.8s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.output-metrics {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  gap: 20px;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.metric-tag span {
  color: var(--primary-emerald);
  font-weight: 600;
}

/* ==========================================================================
   Code Showcase & Integration Section
   ========================================================================== */
.code-showcase-box {
  background: #0B0E17;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.code-tabs {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: rgba(18, 24, 38, 0.95);
  border-bottom: 1px solid var(--border-subtle);
}

.tab-list {
  display: flex;
}

.code-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  padding: 14px 18px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition-normal);
}

.code-tab-btn:hover {
  color: var(--text-secondary);
}

.code-tab-btn.active {
  color: var(--text-primary);
  border-bottom-color: var(--primary-indigo);
}

.copy-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-normal);
}

.copy-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.code-content-wrapper {
  padding: 24px;
  overflow-x: auto;
}

.code-pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: #CBD5E1;
}

.c-kw { color: #F472B6; }      /* Keyword */
.c-str { color: #34D399; }     /* String */
.c-var { color: #38BDF8; }     /* Variable */
.c-prop { color: #A78BFA; }    /* Property */
.c-comment { color: #64748B; font-style: italic; } /* Comment */
.c-num { color: #FBBF24; }     /* Number */

/* ==========================================================================
   Model Matrix / Leaderboard
   ========================================================================== */
.table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(12px);
  position: relative;
}

.table-scroll-hint {
  display: none;
  font-size: 12px;
  color: var(--primary-cyan);
  text-align: center;
  padding: 8px 16px;
  background: rgba(6, 182, 212, 0.08);
  border-bottom: 1px solid var(--border-subtle);
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.custom-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.custom-table th {
  padding: 16px 20px;
  background: rgba(15, 20, 32, 0.95);
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.custom-table td {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
}

.custom-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-primary);
}

.model-name-cell {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--text-primary);
}

.provider-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.15);
  color: #A5B4FC;
}

.bar-container {
  width: 120px;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
}

.bar-fill {
  height: 100%;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-grid {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-normal);
}

.faq-item.active {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.faq-trigger {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
}

.faq-icon {
  transition: transform 0.3s;
  color: var(--text-muted);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--primary-indigo);
}

.faq-content {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
}

.faq-item.active .faq-content {
  display: block;
}

/* ==========================================================================
   CTA Box & Partner Ecosystem
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 27, 75, 0.7) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px -10px rgba(99, 102, 241, 0.25);
}

.partners-section {
  padding-top: 40px;
  padding-bottom: 60px;
  text-align: center;
}

.partner-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-top: 28px;
  opacity: 0.7;
}

.partner-logo-item {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  padding: 8px 16px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  transition: var(--transition-normal);
}

.partner-logo-item:hover {
  opacity: 1;
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  background: #05070B;
  padding: 70px 0 30px;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 14px;
  max-width: 320px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 13px;
  transition: var(--transition-normal);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

.icp-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.icp-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-normal);
}

.icp-links a:hover {
  color: var(--text-secondary);
}

/* ==========================================================================
   Modal Dialog & Toast Notifications
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #0E1320;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  padding: 32px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.85);
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.modal-overlay.active .modal-card {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  font-size: 18px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition: var(--transition-normal);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary-indigo);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--border-glow);
  color: var(--text-primary);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 300;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-span-2 {
    grid-column: span 1;
  }
  .hero-metrics {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 24px;
  }
  .metric-item:nth-child(2)::after {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .nav-links, .nav-actions .btn {
    display: none !important;
  }

  .nav-actions {
    gap: 8px;
  }

  .mobile-toggle {
    display: inline-flex !important;
  }

  .mobile-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(9, 12, 20, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glow);
    padding: 20px;
    display: none !important;
    flex-direction: column;
    gap: 12px;
    z-index: 150;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
  }

  .mobile-nav.open {
    display: flex !important;
  }

  .mobile-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 15px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }

  /* Hero Mobile Refinements */
  .hero {
    padding-top: 110px;
    padding-bottom: 50px;
  }

  .hero-title {
    font-size: clamp(26px, 7vw, 38px);
    line-height: 1.25;
    letter-spacing: -0.5px;
  }

  .hero-desc {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 28px;
  }

  .hero-tagline .badge {
    white-space: normal;
    text-align: left;
    line-height: 1.4;
    padding: 6px 14px;
  }

  .hero-ctas {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    padding: 16px;
    margin-top: 12px;
  }

  .metric-item::after {
    display: none !important;
  }

  .metric-number {
    font-size: 24px;
  }

  /* Section Spacing */
  .section {
    padding: 50px 0;
  }

  .section-header {
    margin-bottom: 32px;
  }

  .section-title {
    font-size: clamp(22px, 5.5vw, 30px);
  }

  /* Bento Grid Mobile */
  .bento-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .bento-card {
    padding: 22px 18px;
  }

  /* Playground Mobile */
  .playground-topbar {
    padding: 14px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .playground-controls {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .model-select {
    width: 100%;
  }

  .scenario-pills {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .pill-btn {
    flex-shrink: 0;
  }

  .playground-body {
    grid-template-columns: 1fr;
  }

  .playground-input-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding: 16px;
    min-width: 0;
  }

  .playground-output-pane {
    padding: 16px;
    min-width: 0;
  }

  .output-content {
    max-height: 220px;
  }

  .output-metrics {
    flex-direction: column;
    gap: 8px;
  }

  /* Code Showcase Mobile */
  .code-tabs {
    padding: 0 10px;
    overflow-x: auto;
    gap: 8px;
  }

  .tab-list {
    flex-shrink: 0;
  }

  .code-tab-btn {
    padding: 12px 12px;
    font-size: 12px;
  }

  .copy-btn {
    flex-shrink: 0;
  }

  .code-content-wrapper {
    padding: 16px;
  }

  /* Table Mobile Hint */
  .table-scroll-hint {
    display: block;
  }

  /* CTA Banner Mobile */
  .cta-banner {
    padding: 36px 18px;
  }

  .cta-banner .btn {
    width: 100%;
  }

  /* Footer Mobile */
  .footer {
    padding: 48px 0 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }

  .icp-links {
    justify-content: center;
  }
}