/* ═══════════════════════════════════════════════════════════════════════════
   AMPS SDK Documentation — Premium Dark Theme
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Design Tokens ─────────────────────────────────────────────────────── */
:root {
  /* Surface */
  --bg-primary: #080808;
  --bg-secondary: #0d0d0d;
  --bg-tertiary: #131313;
  --bg-elevated: #18181b;
  --bg-card: rgba(24, 24, 27, 0.6);
  --bg-code: #0d0d0d;

  /* Borders */
  --border-subtle: rgba(245, 0, 87, 0.1);
  --border-default: rgba(245, 0, 87, 0.2);
  --border-hover: rgba(245, 0, 87, 0.4);

  /* Text */
  --text-primary: #f3f1ed;
  --text-secondary: #9b9894;
  --text-tertiary: #6b6864;
  --text-accent: #f50057;

  /* Accent Gradient */
  --gradient-start: #f50057;
  --gradient-mid: #ff2d78;
  --gradient-end: #ff5c8a;
  --accent: #f50057;
  --accent-hover: #ff2d78;
  --accent-glow: rgba(245, 0, 87, 0.18);

  /* States */
  --warning: #f59e0b;
  --success: #00d294;
  --error: #ef4444;

  /* Code tokens */
  --code-keyword: #ff6fa0;
  --code-string: #00d294;
  --code-comment: #5c5c5c;
  --code-function: #60a5fa;
  --code-property: #ff8fb3;
  --code-number: #fbbf24;
  --code-type: #67e8f9;
  --code-variable: #fda4af;
  --code-punctuation: #6b6864;

  /* Layout */
  --sidebar-width: 260px;
  --content-max: 820px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Sidebar ───────────────────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-default) transparent;
}

.sidebar-header {
  padding: 24px 20px 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar-close {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  position: absolute;
  top: 20px;
  right: 16px;
}

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

.logo-icon {
  width: 38px;
  height: 38px;
  object-fit: contain;
  display: block;
}

.logo-text {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 0;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 8px;
}

.nav-section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  padding: 12px 20px 6px;
}

.nav-link {
  display: block;
  padding: 7px 20px 7px 24px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--accent-glow);
  border-left-color: var(--border-hover);
}

.nav-link.active {
  color: var(--accent-hover);
  background: var(--accent-glow);
  border-left-color: var(--accent);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 4px;
  font-size: 12px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.sidebar-link:hover { color: var(--text-secondary); }
.sidebar-link-icon { font-size: 14px; }

/* ── Mobile Header ─────────────────────────────────────────────────────── */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(7, 7, 14, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 90;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}

.hamburger {
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 4px;
}

.hamburger span {
  width: 20px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-logo {
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
}

.logo-icon-sm {
  width: 18px;
  height: 18px;
  object-fit: contain;
  vertical-align: middle;
}

.backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 90;
}

.backdrop.active { display: block; }

/* ── Content ───────────────────────────────────────────────────────────── */
.content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

/* ── Brand Bar ─────────────────────────────────────────────────────────── */
.brand-bar {
  display: flex;
  justify-content: center;
  padding: 32px 48px 0;
}

.brand-bar-link {
  display: inline-flex;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.brand-bar-link:hover {
  opacity: 1;
}

.brand-bar-logo {
  height: 32px;
  width: auto;
  display: block;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  padding: 100px 48px 80px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse at center,
    rgba(124, 58, 237, 0.12) 0%,
    rgba(99, 102, 241, 0.06) 40%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 32px;
  position: relative;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: clamp(42px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  position: relative;
}

.gradient-text {
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-mid) 50%, var(--gradient-end) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-install {
  display: flex;
  justify-content: center;
  margin-bottom: 48px;
}

.install-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-code);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  transition: border-color var(--transition-normal);
}

.install-box:hover {
  border-color: var(--border-hover);
}

.install-prefix {
  color: var(--accent);
  font-weight: 600;
}

.install-box code {
  color: var(--text-primary);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
}

.stat { text-align: center; }

.stat-value {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background: var(--border-default);
}

.hero-footnote {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 12px;
}

/* ── Doc Sections ──────────────────────────────────────────────────────── */
.doc-section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 48px 48px 16px;
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  position: relative;
}

.section-title::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: linear-gradient(to bottom, var(--gradient-start), var(--gradient-end));
  border-radius: 2px;
}

.section-desc {
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 680px;
}

/* ── Code Blocks ───────────────────────────────────────────────────────── */
.code-block {
  background: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  overflow: hidden;
  transition: border-color var(--transition-normal);
}

.code-block:hover {
  border-color: var(--border-default);
}

.code-block-sm {
  margin-bottom: 0;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.01);
}

.code-lang {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
}

.code-block pre {
  padding: 16px 20px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-default) transparent;
}

.code-block code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-primary);
}

.code-block-sm pre { padding: 12px 14px; }
.code-block-sm code { font-size: 12px; }

/* Code tokens */
.token-keyword { color: var(--code-keyword); }
.token-string { color: var(--code-string); }
.token-comment { color: var(--code-comment); font-style: italic; }
.token-function { color: var(--code-function); }
.token-property { color: var(--code-property); }
.token-number { color: var(--code-number); }
.token-type { color: var(--code-type); }
.token-variable { color: var(--code-variable); }
.token-punctuation { color: var(--code-punctuation); }

.inline-code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88em;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--accent-hover);
}

/* ── Copy Button ───────────────────────────────────────────────────────── */
.copy-btn {
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 13px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-tertiary);
}

.copy-btn:hover {
  border-color: var(--border-hover);
  background: var(--accent-glow);
}

.copy-btn .copy-check {
  display: none;
  color: var(--success);
}

.copy-btn.copied .copy-icon { display: none; }
.copy-btn.copied .copy-check { display: inline; }

/* ── Info Cards ────────────────────────────────────────────────────────── */
.info-card {
  display: flex;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(139, 92, 246, 0.05);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--text-secondary);
}

.info-card strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 4px;
}

.info-card p { margin: 0; }

.info-card-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

.info-card-warning {
  background: rgba(245, 158, 11, 0.05);
  border-color: rgba(245, 158, 11, 0.15);
}

/* ── Feature Grid ──────────────────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.feature-icon {
  font-size: 24px;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.5;
}

/* ── API Tables ────────────────────────────────────────────────────────── */
.api-table {
  overflow-x: auto;
  margin-bottom: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.api-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.api-table th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
}

.api-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.api-table tr:last-child td { border-bottom: none; }

.api-table tr:hover td { background: var(--accent-glow); }

/* ── Flow Diagram ──────────────────────────────────────────────────────── */
.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 32px 0;
  flex-wrap: wrap;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  transition: all var(--transition-normal);
}

.flow-step:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.flow-number {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.flow-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.flow-arrow {
  font-size: 18px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

/* ── Section Divider ───────────────────────────────────────────────────── */
.section-divider {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: var(--content-max);
  margin: 48px auto 16px;
  padding: 0 48px;
}

.divider-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-default), transparent);
}

.divider-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  white-space: nowrap;
}

/* ── Footer ────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border-subtle);
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 32px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
}

.footer-sep { color: var(--border-default); }

.footer-muted {
  font-weight: 400;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover { color: var(--accent-hover); }

/* ═══════════════════════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    box-shadow: none;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 12px 0 40px rgba(0,0,0,0.5);
  }

  .sidebar-close { display: block; }

  .mobile-header { display: flex; }

  .content {
    margin-left: 0;
    padding-top: 56px;
  }

  .hero {
    padding: 60px 24px 50px;
  }

  .hero-title {
    font-size: 36px;
  }

  .doc-section {
    padding: 32px 24px 12px;
  }

  .section-title {
    font-size: 22px;
  }

  .section-title::before {
    left: -12px;
  }

  .section-divider {
    padding: 0 24px;
  }

  .flow-diagram {
    flex-direction: column;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    padding: 24px;
  }

  .install-box {
    font-size: 12px;
    padding: 12px 14px;
  }

  .hero-stats {
    gap: 20px;
  }

  .code-block pre {
    padding: 12px 14px;
  }

  .code-block code {
    font-size: 12px;
  }
}

/* ── Scrollbar ─────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-default);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ── Selection ─────────────────────────────────────────────────────────── */
::selection {
  background: rgba(139, 92, 246, 0.3);
  color: white;
}