/* ==========================================================================
   Entry Sync Design System - styles.css
   Ultra-Clean, Sophisticated, Linear/Vercel-inspired Modern Aesthetic
   ========================================================================== */

:root {
  /* Surface Colors */
  --bg-primary: #07090e;
  --bg-secondary: #0d111b;
  --bg-card: rgba(15, 20, 32, 0.72);
  --bg-card-hover: rgba(22, 29, 46, 0.85);
  --bg-glass: rgba(10, 13, 22, 0.78);
  --bg-input: rgba(14, 18, 30, 0.9);
  --bg-code: #090c14;

  /* Accent & Brand Colors */
  --primary: #00d2ff;
  --primary-rgb: 0, 210, 255;
  --primary-light: #7be5ff;
  --primary-glow: rgba(0, 210, 255, 0.22);
  --accent-indigo: #6366f1;
  --accent-purple: #8b5cf6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #00d2ff 0%, #3b82f6 50%, #8b5cf6 100%);
  --grad-text: linear-gradient(135deg, #ffffff 30%, #c7d2fe 70%, #7be5ff 100%);
  --grad-card: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.005) 100%);

  /* Text Colors */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-inverse: #07090e;

  /* Borders & Shadows */
  --border-light: rgba(255, 255, 255, 0.07);
  --border-card: rgba(255, 255, 255, 0.11);
  --border-hover: rgba(0, 210, 255, 0.45);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 35px rgba(0, 210, 255, 0.18);

  /* Typography & Sizing */
  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Fira Code', 'SF Mono', Consolas, Monaco, monospace;
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --container-max: 1180px;
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-input: #ffffff;
  --bg-code: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  --text-inverse: #ffffff;
  --border-light: rgba(0, 0, 0, 0.07);
  --border-card: rgba(0, 0, 0, 0.1);
  --border-hover: rgba(0, 180, 216, 0.5);
  --grad-text: linear-gradient(135deg, #0f172a 30%, #2563eb 70%, #0096c7 100%);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.07);
  --shadow-glow: 0 0 25px rgba(0, 180, 216, 0.12);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 210, 255, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 85% 60%, rgba(99, 102, 241, 0.06) 0%, transparent 50%);
  background-attachment: fixed;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Vector SVG Icon System */
.svg-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}

.svg-icon.icon-xs { width: 14px; height: 14px; stroke-width: 2; }
.svg-icon.icon-sm { width: 16px; height: 16px; stroke-width: 2; }
.svg-icon.icon-md { width: 22px; height: 22px; stroke-width: 1.8; }
.svg-icon.icon-lg { width: 28px; height: 28px; stroke-width: 1.7; }
.svg-icon.icon-xl { width: 36px; height: 36px; stroke-width: 1.6; }

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #00d2ff, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0, 210, 255, 0.3);
  overflow: hidden;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.logo-text {
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  background: rgba(0, 210, 255, 0.12);
  color: var(--primary);
  border: 1px solid rgba(0, 210, 255, 0.25);
  border-radius: var(--radius-full);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
  padding: 6px 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--grad-primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px var(--primary-glow);
  transition: var(--transition);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(0, 210, 255, 0.4);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 85px 0 65px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.hero-tag-wrap {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 5px 14px;
  background: rgba(0, 210, 255, 0.08);
  border: 1px solid rgba(0, 210, 255, 0.22);
  border-radius: var(--radius-full);
  width: fit-content;
}

.hero-tag-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2.2s infinite;
}

.hero-tag-text {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--primary-light);
  letter-spacing: -0.01em;
}

.hero-title {
  font-size: 3.1rem;
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.03em;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 530px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  color: var(--text-main);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  transition: var(--transition);
}

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

.hero-tech-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 10px;
  font-size: 0.83rem;
  color: var(--text-dim);
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-weight: 500;
}

.tech-item span {
  color: var(--text-muted);
}

/* ==========================================================================
   Hero Visual Simulator (Linear/Terminal Style)
   ========================================================================== */
.hero-visual {
  position: relative;
}

.mockup-window {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  overflow: hidden;
  backdrop-filter: blur(18px);
}

.mockup-header {
  height: 42px;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-light);
}

.mockup-dots {
  display: flex;
  gap: 7px;
}

.mockup-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}
.mockup-dot.red { background: #ef4444; opacity: 0.85; }
.mockup-dot.yellow { background: #f59e0b; opacity: 0.85; }
.mockup-dot.green { background: #10b981; opacity: 0.85; }

.mockup-title {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
}

.mockup-live {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-emerald);
  letter-spacing: 0.04em;
}

.mockup-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sim-room-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-size: 0.82rem;
}

.sim-room-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sim-room-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.04);
}

.sim-room-id {
  font-family: var(--font-mono);
  color: var(--primary);
  font-weight: 600;
}

.sim-tabs-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.sim-tab-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

.sim-status-var {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.08) 0%, rgba(99, 102, 241, 0.04) 100%);
  border: 1px solid rgba(0, 210, 255, 0.25);
  border-radius: var(--radius-sm);
}

.sim-status-info {
  flex: 1;
}

.sim-status-title {
  font-size: 0.74rem;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 2px;
}

.sim-status-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: #00d2ff;
}

.sim-enforced-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 3px 8px;
  border-radius: var(--radius-full);
}

.sim-var-badge {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.85rem;
  padding: 4px 8px;
  border-radius: 6px;
  line-height: 1;
  letter-spacing: -0.02em;
}
.badge-status { background: rgba(0, 210, 255, 0.18); color: #00d2ff; border: 1px solid rgba(0, 210, 255, 0.35); }
.badge-sync { background: rgba(99, 102, 241, 0.18); color: #a5b4fc; border: 1px solid rgba(99, 102, 241, 0.35); }
.badge-save { background: rgba(16, 185, 129, 0.18); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.35); }
.badge-hybrid { background: rgba(244, 63, 94, 0.18); color: #fda4af; border: 1px solid rgba(244, 63, 94, 0.35); }

.sim-var-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.025);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-size: 0.88rem;
  transition: var(--transition);
}

.sim-var-row:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.1);
}

.sim-var-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sim-var-name {
  font-weight: 600;
  font-size: 0.88rem;
}

.sim-type-badge {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}

.sim-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  background: rgba(0, 0, 0, 0.3);
  padding: 3px 8px;
  border-radius: 5px;
  border: 1px solid var(--border-light);
}

/* Balanced 4-Grid Button Bar */
.sim-actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 4px;
}

.sim-btn {
  padding: 10px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  background: rgba(255, 255, 255, 0.035);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: var(--text-main);
  text-align: center;
}

.sim-btn:hover {
  background: rgba(0, 210, 255, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 210, 255, 0.15);
}

.sim-btn:active {
  transform: translateY(0);
}

.sim-btn-text {
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}

.sim-btn-sub {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 5px;
  border-radius: 4px;
  line-height: 1.2;
}

/* ==========================================================================
   Stats Banner
   ========================================================================== */
.stats-banner {
  padding: 32px 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  background: rgba(13, 17, 27, 0.45);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
}

.stat-number {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 54px;
}

.section-subtitle {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--primary);
  margin-bottom: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Feature Cards Grid (Linear-Style Minimalist Cards)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 30px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-primary);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md), 0 0 24px rgba(0, 210, 255, 0.12);
  background: var(--bg-card-hover);
}

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

.feature-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0, 210, 255, 0.08);
  border: 1px solid rgba(0, 210, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Prefix Rules (Clean Linear/Raycast-Style Interactive Spec)
   ========================================================================== */
.rules-container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  align-items: start;
}

.rule-cards-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rule-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: 16px;
  overflow: hidden;
}

.rule-card:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-card-hover);
  transform: translateX(3px);
}

.rule-card.active {
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.08) 0%, rgba(20, 26, 44, 0.85) 100%);
  border-color: rgba(0, 210, 255, 0.4);
  box-shadow: 0 4px 20px rgba(0, 210, 255, 0.12);
}

.rule-card.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3.5px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
}

.rule-tag {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 800;
  flex-shrink: 0;
}

.rule-tag.status { background: rgba(0, 210, 255, 0.14); color: #00d2ff; border: 1px solid rgba(0, 210, 255, 0.3); }
.rule-tag.sync { background: rgba(99, 102, 241, 0.14); color: #a5b4fc; border: 1px solid rgba(99, 102, 241, 0.3); }
.rule-tag.data { background: rgba(16, 185, 129, 0.14); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.rule-tag.hybrid { background: rgba(244, 63, 94, 0.14); color: #fda4af; border: 1px solid rgba(244, 63, 94, 0.3); }

.rule-info {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}

.rule-name-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.rule-name {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.rule-pill-badge {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-dim);
  border: 1px solid var(--border-light);
}

.rule-summary {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Right Interactive Box */
.rule-interactive-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  position: sticky;
  top: 90px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
}

.box-title {
  font-size: 1.12rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-light);
}

/* 2x2 Grid of Spec Tiles */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 16px 0;
}

.spec-tile {
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-xs);
  padding: 12px 14px;
  transition: var(--transition);
}

.spec-tile:hover {
  background: rgba(0, 0, 0, 0.38);
  border-color: rgba(0, 210, 255, 0.2);
}

.spec-tile-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.spec-tile-val {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
}

/* Code Snippet Box with Header */
.code-box-wrapper {
  background: var(--bg-code);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xs);
  overflow: hidden;
  margin-top: 14px;
}

.code-box-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.code-header-left {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.code-snippet-pre {
  padding: 14px 16px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: #e2e8f0;
  overflow-x: auto;
}

/* Syntax Highlighting Colors */
.syn-comment { color: #64748b; font-style: italic; }
.syn-block { color: #f472b6; font-weight: 600; }
.syn-var { color: #38bdf8; font-weight: 700; }
.syn-action { color: #a78bfa; }
.syn-str { color: #fbbf24; }
.syn-val { color: #34d399; font-weight: 600; }

.code-copy-btn {
  padding: 4px 9px;
  font-size: 0.72rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 600;
}

.code-copy-btn:hover {
  background: var(--primary);
  color: #000;
  border-color: var(--primary);
}

/* ==========================================================================
   Architecture Section
   ========================================================================== */
.arch-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.arch-flow {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.arch-node {
  flex: 1;
  min-width: 210px;
  padding: 22px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.arch-node-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
}

.arch-node-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.arch-node-desc {
  font-size: 0.83rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.arch-arrow {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Notices & Announcements Section
   ========================================================================== */
.notices-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.notices-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.notice-filter-group {
  display: flex;
  gap: 8px;
}

.filter-btn {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--primary);
  color: #000;
  border-color: var(--primary);
}

.notice-search-box {
  position: relative;
  min-width: 250px;
}

.notice-search-input {
  width: 100%;
  padding: 7px 14px 7px 36px;
  background: var(--bg-input);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition);
}

.notice-search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.notice-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

.notices-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.notice-card {
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.notice-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--primary);
  transform: translateX(3px);
}

.notice-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 5px;
}

.notice-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  text-transform: uppercase;
}
.notice-badge.Update { background: rgba(0, 210, 255, 0.14); color: #00d2ff; }
.notice-badge.Guide { background: rgba(16, 185, 129, 0.14); color: #34d399; }
.notice-badge.Notice { background: rgba(245, 158, 11, 0.14); color: #fbbf24; }

.notice-date {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.notice-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 3px;
}

.notice-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.notice-arrow {
  color: var(--text-dim);
  transition: var(--transition);
}

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

/* Notice Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.78);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

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

.modal-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  max-width: 660px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  padding: 30px;
  position: relative;
  transform: scale(0.96);
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.open .modal-container {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 22px;
  right: 22px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close-btn:hover { color: #fff; }

.modal-body {
  margin-top: 18px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  white-space: pre-line;
}

.modal-body h3 {
  font-size: 1.1rem;
  color: var(--text-main);
  margin: 16px 0 8px;
}

/* ==========================================================================
   Quick Start (3-Steps)
   ========================================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: var(--transition);
}

.step-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--grad-primary);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 2px 10px var(--primary-glow);
}

.step-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.step-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.02rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  color: var(--primary);
  transition: transform 0.22s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  transition: max-height 0.28s ease, padding 0.28s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ==========================================================================
   CTA Banner
   ========================================================================== */
.cta-section {
  padding: 75px 0;
}

.cta-banner {
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
  border: 1px solid rgba(0, 210, 255, 0.25);
  border-radius: var(--radius-md);
  padding: 55px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 35px rgba(0, 210, 255, 0.12);
}

.cta-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.cta-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 28px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding: 55px 0 28px;
  margin-top: auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border-light);
}

.footer-brand {
  max-width: 350px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-links-group {
  display: flex;
  gap: 55px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-main);
  letter-spacing: 0.05em;
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 26px;
  font-size: 0.83rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 14px;
}

/* ==========================================================================
   Privacy Policy Page Dedicated Styles
   ========================================================================== */
.privacy-page {
  padding: 50px 0 90px;
}

.privacy-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 42px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
}

.privacy-header {
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 22px;
  margin-bottom: 32px;
}

.privacy-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.privacy-meta {
  display: flex;
  gap: 18px;
  font-size: 0.88rem;
  color: var(--text-dim);
}

.privacy-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 34px 0 14px;
  color: var(--primary);
  border-left: 3px solid var(--primary);
  padding-left: 12px;
}

.privacy-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 22px 0 10px;
  color: var(--text-main);
}

.privacy-content p {
  margin-bottom: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.privacy-content ul {
  margin: 10px 0 18px 22px;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.94rem;
}

.privacy-content li {
  margin-bottom: 6px;
}

.privacy-table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 24px;
  font-size: 0.9rem;
}

.privacy-table th, .privacy-table td {
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.privacy-table th {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
  font-weight: 700;
}

.privacy-table td {
  color: var(--text-muted);
}

.privacy-alert {
  background: rgba(0, 210, 255, 0.07);
  border: 1px solid rgba(0, 210, 255, 0.22);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  margin: 20px 0;
  color: var(--text-main);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.94rem;
}

/* Animations & Responsive */
@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70% { transform: scale(1); box-shadow: 0 0 0 7px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .rules-container { grid-template-columns: 1fr; }
  .rule-interactive-box { position: static; }
  .steps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .arch-flow { flex-direction: column; }
  .arch-arrow { transform: rotate(90deg); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero-title { font-size: 2.3rem; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-links-group { flex-direction: column; gap: 26px; }
  .privacy-card { padding: 22px; }
}