:root {
    --primary: #363062;
    --primary-dark: #2a2550;
    --primary-light: #d8d5e8;
    --primary-bg: #f4f3f9;
    --secondary: #f99417;
    --secondary-dark: #d97a0a;
    --secondary-light: #fff4e0;
    --dark: #1a1730;
    --body: #1e1e2e;
    --muted: #6b6781;
    --muted-light: #9b97ad;
    --border: #e5e3ed;
    --bg-light: #f8f8fb;
    --code-bg: #f3f2f7;
    --code-dark-bg: #1a1730;
    --code-dark-text: #e5e3ed;
    --warn: #d97a0a;
    --warn-bg: #fff4e0;
    --warn-text: #8a4a00;
  }

  * { box-sizing: border-box; }

  html { scroll-behavior: smooth; scroll-padding-top: 24px; }

  body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--body);
    font-size: 16px;
    line-height: 1.65;
    background: #fff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }


  .cover-logo {
    display: block;
    width: clamp(220px, 38vw, 380px);
    height: auto;
    margin: 0 0 28px 0;
  }
  .footer-logo {
    width: 140px;
    height: auto;
    opacity: 0.75;
    margin-bottom: 12px;
  }
  /* ============ COVER ============ */
  .cover {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1730 0%, #363062 55%, #4a3f7a 100%);
    color: #fff;
    padding: 96px 24px;
    min-height: 70vh;
    display: flex;
    align-items: center;
  }
  .cover::before {
    content: "";
    position: absolute;
    top: -120px; right: -120px;
    width: 420px; height: 420px;
    background: radial-gradient(circle, rgba(249,148,23,0.30) 0%, rgba(249,148,23,0) 70%);
    border-radius: 50%;
    pointer-events: none;
  }
  .cover::after {
    content: "";
    position: absolute;
    bottom: -150px; left: -100px;
    width: 480px; height: 480px;
    background: radial-gradient(circle, rgba(249,148,23,0.18) 0%, rgba(249,148,23,0) 70%);
    border-radius: 50%;
    pointer-events: none;
  }
  .cover-inner {
    position: relative;
    z-index: 1;
    max-width: 880px;
    margin: 0 auto;
    width: 100%;
  }
  .cover-tag {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: #f99417;
    border: 1px solid rgba(249,148,23,0.5);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 28px;
  }
  .cover-title {
    font-size: clamp(56px, 11vw, 96px);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1;
    margin: 0 0 18px 0;
    background: linear-gradient(90deg, #ffffff 0%, #f99417 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .cover-subtitle {
    font-size: clamp(18px, 2.4vw, 22px);
    font-weight: 300;
    color: #d8d5e8;
    margin: 0 0 14px 0;
  }
  .cover-desc {
    font-size: 16px;
    color: #9b97ad;
    max-width: 560px;
    line-height: 1.65;
    margin: 0 0 40px 0;
  }
  .cover-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 24px;
    border-top: 1px solid rgba(255,255,255,0.15);
    padding-top: 22px;
  }
  .cover-meta-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #9b97ad;
    margin-bottom: 4px;
  }
  .cover-meta-value {
    font-size: 15px;
    color: #f5f4fa;
    font-weight: 500;
  }

  /* ============ LAYOUT ============ */
  .container {
    max-width: 880px;
    margin: 0 auto;
    padding: 64px 24px 96px;
  }
  .section { padding-top: 56px; padding-bottom: 8px; }
  .section:first-of-type { padding-top: 0; }

  /* ============ TYPOGRAPHY ============ */
  h1, h2, h3, h4 { color: var(--dark); font-weight: 700; margin: 0; }
  h1 {
    font-size: 36px;
    margin: 0 0 8px 0;
    letter-spacing: -0.5px;
    line-height: 1.15;
  }
  .h1-num {
    color: var(--primary);
    font-weight: 800;
    margin-right: 14px;
  }
  h1 + .lead {
    color: var(--muted);
    font-size: 18px;
    margin: 0 0 32px 0;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
    font-weight: 400;
  }
  h2 {
    font-size: 22px;
    margin: 36px 0 12px 0;
  }
  h3 {
    font-size: 17px;
    margin: 24px 0 10px 0;
    color: #44406a;
  }
  p { margin: 0 0 14px 0; }
  ul, ol { margin: 0 0 14px 0; padding-left: 24px; }
  li { margin-bottom: 6px; }
  strong { color: var(--dark); font-weight: 600; }
  a { color: var(--primary); text-decoration: none; }
  a:hover { text-decoration: underline; }

  /* ============ TOC ============ */
  .toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border-top: 1px solid var(--border);
  }
  .toc-list li {
    border-bottom: 1px solid var(--border);
  }
  .toc-list a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 14px 6px;
    color: var(--body);
    font-size: 16px;
    transition: background 0.15s, color 0.15s;
    border-radius: 4px;
  }
  .toc-list a:hover {
    background: var(--primary-bg);
    color: var(--primary-dark);
    text-decoration: none;
  }
  .toc-num {
    color: var(--primary);
    font-weight: 700;
    width: 36px;
    flex-shrink: 0;
  }
  .toc-title { flex: 1; }
  .toc-page { color: var(--muted-light); font-weight: 500; font-size: 14px; }

  /* ============ CALLOUTS ============ */
  .callout, .note {
    padding: 16px 20px;
    margin: 18px 0;
    border-radius: 0 8px 8px 0;
    font-size: 15px;
  }
  .callout {
    background: var(--primary-bg);
    border-left: 3px solid var(--primary);
  }
  .callout strong { color: #1e40af; }
  .note {
    background: var(--warn-bg);
    border-left: 3px solid var(--warn);
  }
  .note strong { color: var(--warn-text); }

  /* ============ TABLES ============ */
  .table-wrap { overflow-x: auto; margin: 16px 0 24px 0; }
  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
  }
  th {
    background: #f1f5f9;
    color: var(--dark);
    text-align: left;
    padding: 12px 14px;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid #cbd5e1;
  }
  td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
  }
  tr:last-child td { border-bottom: none; }
  td code { background: transparent; padding: 0; color: var(--primary); font-weight: 500; }

  /* ============ CODE ============ */
  code {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    background: var(--code-bg);
    color: var(--dark);
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 13.5px;
  }
  pre {
    background: var(--code-dark-bg);
    color: var(--code-dark-text);
    padding: 18px 20px;
    border-radius: 8px;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 13.5px;
    line-height: 1.6;
    margin: 16px 0;
    overflow-x: auto;
    white-space: pre;
  }
  pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }
  pre .com { color: #64748b; }
  pre .key { color: #b8b3d9; }
  pre .str { color: #f99417; }
  pre .tag { color: #f9a8d4; }

  /* ============ FEATURE GRID ============ */
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 14px;
    margin: 22px 0;
  }
  .feature-card {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px;
    background: #fff;
    transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  }
  .feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
  }
  .feature-card .icon {
    display: inline-block;
    width: 10px;
    height: 10px;
    background: var(--secondary);
    border-radius: 50%;
    margin-bottom: 10px;
    box-shadow: 0 0 0 5px var(--secondary-light);
  }
  .feature-card h4 {
    margin: 0 0 6px 0;
    font-size: 16px;
    color: var(--dark);
  }
  .feature-card p {
    margin: 0;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.55;
  }

  /* ============ PAGE LIST ============ */
  .page-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 12px;
    margin: 18px 0;
  }
  .page-list-item {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 14px;
    line-height: 1.5;
    transition: border-color 0.15s;
  }
  .page-list-item:hover { border-color: var(--primary); }
  .page-list-item strong {
    display: block;
    color: var(--dark);
    font-size: 15px;
    margin-bottom: 2px;
  }
  .page-list-item code {
    font-size: 12.5px;
    background: transparent;
    color: var(--primary);
    padding: 0;
  }

  /* ============ KEY VALUE LIST ============ */
  .kv-list {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    margin: 18px 0;
  }
  .kv-row {
    display: flex;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
  }
  .kv-row:last-child { border-bottom: none; }
  .kv-key {
    width: 40%;
    padding: 12px 16px;
    background: var(--bg-light);
    font-weight: 600;
    color: #44406a;
  }
  .kv-val {
    flex: 1;
    padding: 12px 16px;
  }

  /* ============ CLOSING ============ */
  .closing {
    text-align: center;
    padding: 56px 32px;
    border: 2px solid var(--border);
    border-radius: 16px;
    margin: 48px 0 0 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, #fff 100%);
  }
  .closing h2 {
    border: none;
    color: var(--primary-dark);
    margin: 0 0 4px 0;
    font-size: 18px;
  }
  .closing p { color: #475569; margin: 8px 0; }
  .thank-you {
    font-size: 56px;
    font-weight: 800;
    background:#f99417;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 16px 0 14px 0;
    letter-spacing: -1.5px;
    line-height: 1;
  }

  /* ============ FOOTER ============ */
  .doc-footer {
    border-top: 1px solid var(--border);
    margin-top: 64px;
    padding: 32px 24px;
    text-align: center;
    color: var(--muted-light);
    font-size: 14px;
  }

  /* ============ MOBILE ============ */
  @media (max-width: 640px) {
    body { font-size: 15px; }
    .container { padding: 40px 18px 64px; }
    .cover { padding: 64px 20px; min-height: 60vh; }
    h1 { font-size: 28px; }
    h2 { font-size: 19px; }
    h3 { font-size: 16px; }
    .kv-row { flex-direction: column; }
    .kv-key { width: 100%; padding: 10px 14px 4px; }
    .kv-val { padding: 4px 14px 10px; }
    pre { font-size: 12.5px; padding: 14px 16px; }
  }

  /* ============ PRINT ============ */
  @media print {
    body { font-size: 10.5pt; }
    @page {
      size: A4;
      margin: 22mm 18mm 22mm 18mm;
      @bottom-center {
        content: "Trendexa Documentation  •  Page " counter(page) " of " counter(pages);
        font-family: 'Inter', sans-serif;
        font-size: 9pt;
        color: #9b97ad;
      }
    }
    @page :first {
      margin: 0;
      @bottom-center { content: ""; }
    }
    .cover {
      page-break-after: always;
      min-height: auto;
      height: 297mm;
      width: 210mm;
      padding: 60mm 22mm 25mm 22mm;
      align-items: flex-start;
    }
    .cover-inner { max-width: 100%; }
    .cover-title { font-size: 64pt; }
    .cover-subtitle { font-size: 16pt; }
    .container { max-width: 100%; padding: 0; }
    .section { page-break-after: always; padding-top: 0; }
    .section:last-of-type { page-break-after: auto; }
    .feature-card:hover, .page-list-item:hover {
      transform: none;
      box-shadow: none;
      border-color: var(--border);
    }
    a { color: inherit; text-decoration: none; }
    .doc-footer { display: none; }
  }