:root {
      --bg: #ffffff;
      --bg-2: #f7f7f7;
      --bg-3: #efefef;
      --surface: #ffffff;
      --border: #e2e2e2;
      --border-2: #c4c4c4;
      --text: #0a0a0a;
      --text-2: #525252;
      --text-3: #6a6a6a;
      --green: #FF5F15;
      --green-hover: #db5314;
      --green-pale: rgb(255, 95, 21, 0.08);
      --green-text: #FF5F15;
      --code-bg: #f1f1f1;
      --code-border: #cdcdcd;
      --t: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
      --ff-display: 'Newsreader', Georgia, serif;
      --ff-body: 'Inter', system-ui, sans-serif;
      --ff-mono: 'JetBrains Mono', monospace;
      --nav-bg: rgba(255, 255, 255, 0.75);
    }

    [data-theme="dark"] {
      --bg: rgb(8, 8, 8);
      --bg-2: #111111;
      --bg-3: #1c1c1c;
      --surface: #0f0f0f;
      --border: #1e1e1e;
      --border-2: #303030;
      --text: #f0f0f0;
      --text-2: #888888;
      --text-3: #444444;
      --green: #FF5F15;
      --green-hover: #db5314;
      --green-pale: rgb(255, 95, 21, 0.08);
      --green-text: #FF5F15;
      --code-bg: #050505;
      --code-border: #161616;
      --nav-bg: rgba(8, 8, 8, 0.75);
    }

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

    html {
      scroll-behavior: auto; /* Reset smooth scroll for instant page swapping */
    }

    body {
      font-family: var(--ff-body);
      background: var(--bg);
      color: var(--text);
      font-size: 15px;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      transition: background var(--t), color var(--t);
    }

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

    button {
      cursor: pointer;
      border: none;
      background: none;
      font-family: inherit;
    }

    ::selection {
      background: var(--green);
      color: #fff;
    }

    /* ─── Nav ─────────────────────────────────────────────────────── */
    #nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      height: 56px;
      border-bottom: 1px solid var(--border);
      background: var(--nav-bg);
      display: flex;
      align-items: center;
      transition: background var(--t), border-color var(--t);
      backdrop-filter: url('#wave-filter');
    }

    .nav-inner {
      max-width: 1200px;
      margin: 0 auto;
      width: 100%;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .nav-logo {
      font-family: var(--ff-display);
      font-size: 24px;
      letter-spacing: -0.3px;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 7px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
    }

    .nav-links a {
      font-size: 13.5px;
      font-weight: 400;
      color: var(--text-2);
      transition: color var(--t);
    }

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

    .nav-links a.ext::after {
      content: ' ↗';
      font-size: 11px;
      opacity: 0.6;
    }

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

    .theme-btn {
      width: 32px;
      height: 32px;
      border-radius: 6px;
      border: 1px solid var(--border);
      background: var(--bg-2);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-2);
      transition: all var(--t);
    }

    .theme-btn:hover {
      border-color: var(--border-2);
      color: var(--text);
    }

    .theme-btn svg {
      width: 15px;
      height: 15px;
      stroke: currentColor;
      fill: none;
      stroke-width: 1.8;
      stroke-linecap: round;
    }

    .nav-mobile-btn {
      display: none;
      width: 32px;
      height: 32px;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border);
      border-radius: 6px;
      background: var(--bg-2);
      color: var(--text-2);
    }

    @media (max-width: 768px) {
      .nav-mobile-btn {
        display: flex;
      }
    }

    .nav-mobile-btn svg {
      width: 16px;
      height: 16px;
      stroke: currentColor;
      fill: none;
      stroke-width: 1.8;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 56px;
      left: 0;
      right: 0;
      z-index: 99;
      background: var(--bg);
      border-bottom: 1px solid var(--border);
      padding: 16px 24px;
      flex-direction: column;
      gap: 0;
    }

    .mobile-menu.open {
      display: flex;
    }

    .mobile-menu a {
      font-size: 14px;
      color: var(--text-2);
      padding: 12px 0;
      border-bottom: 1px solid var(--border);
      transition: color var(--t);
    }

    .mobile-menu a:last-child {
      border: none;
    }

    .mobile-menu a:hover {
      color: var(--text);
    }

    /* ─── SPA Page Routing ────────────────────────────────────────── */
    .main-wrapper {
      padding-top: 56px;
      min-height: calc(100vh - 220px);
      display: flex;
      flex-direction: column;
    }

    .page-view {
      display: none;
      flex: 1;
    }

    .page-view.active {
      display: block;
      animation: fadePage 0.3s ease forwards;
    }

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

    /* ─── Sections shared ─────────────────────────────────────────── */
    .section {
      padding: 64px 24px 96px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .section-label {
      font-family: var(--ff-mono);
      font-size: 11px;
      font-weight: 500;
      text-transform: uppercase;
      letter-spacing: 0.12em;
      color: var(--text-3);
      margin-bottom: 20px;
    }

    .section-title {
      font-family: var(--ff-display);
      font-style: italic;
      font-weight: 400;
      font-size: clamp(2.2rem, 5vw, 3.5rem);
      line-height: 1.1;
      letter-spacing: -0.02em;
      color: var(--text);
      margin-bottom: 16px;
    }

    .section-sub {
      font-size: 15px;
      color: var(--text-2);
      max-width: 480px;
      line-height: 1.75;
    }

    .section-head {
      margin-bottom: 56px;
    }

    /* ─── Reveal ──────────────────────────────────────────────────── */
    .reveal {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.55s ease, transform 0.55s ease;
    }

    .reveal.in {
      opacity: 1;
      transform: none;
    }

    .reveal.d1 { transition-delay: 0.08s; }
    .reveal.d2 { transition-delay: 0.16s; }

    /* ─── Hero ────────────────────────────────────────────────────── */
    .hero-eyebrow {
      font-family: var(--ff-mono);
      font-size: 11.5px;
      color: var(--text-3);
      letter-spacing: 0.08em;
      margin-bottom: 28px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .hero-eyebrow-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--green);
      animation: pulse 2.4s ease-in-out infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1 }
      50% { opacity: 0.3 }
    }

    .hero-h1 {
      font-family: var(--ff-display);
      font-style: italic;
      font-weight: 300;
      font-size: clamp(4.5rem, 13vw, 10.5rem);
      line-height: 0.93;
      letter-spacing: -0.03em;
      color: var(--text);
      margin-bottom: 40px;
    }

    .hero-row {
      display: flex;
      align-items: flex-start;
      gap: 48px;
      flex-wrap: wrap;
      padding-top: 16px;
      padding-bottom: 16px;
      border-top: 1px solid var(--border);
    }

    .hero-desc {
      font-size: 15px;
      color: var(--text-2);
      max-width: 480px;
      line-height: 1.75;
      flex: 1;
      min-width: 240px;
    }

    .hero-actions {
      display: flex;
      flex-direction: column;
      gap: 16px;
      flex-shrink: 0;
    }

    .hero-btns {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-green {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 9px 18px;
      background: var(--green);
      color: #fff;
      font-size: 14px;
      font-weight: 500;
      border-radius: 6px;
      border: 1px solid transparent;
      transition: all var(--t);
      font-family: var(--ff-display);
      font-style: italic;
      text-align: center;
    }

    .btn-green:hover {
      background: var(--green-hover);
      transform: translateY(-1px);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 9px 18px;
      background: transparent;
      color: var(--text);
      font-size: 13.5px;
      font-weight: 400;
      border-radius: 6px;
      border: 1px solid var(--border);
      transition: all var(--t);
    }

    .btn-outline:hover {
      border-color: var(--border-2);
      background: var(--bg-2);
      transform: translateY(-1px);
    }

    /* ─── Legal Specific Typography & Elements ────────────────────── */
    .legal-content {
      max-width: 840px;
    }

    .legal-content h3 {
      font-size: 19px;
      font-weight: 600;
      letter-spacing: -0.3px;
      margin-top: 48px;
      margin-bottom: 12px;
      color: var(--text);
    }

    .legal-content p {
      font-size: 15px;
      color: var(--text-2);
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .legal-content ul {
      margin-bottom: 20px;
      padding-left: 20px;
      color: var(--text-2);
      font-size: 15px;
      line-height: 1.8;
      list-style-type: disc;
    }

    .legal-content li {
      margin-bottom: 8px;
    }

    .legal-content strong {
      color: var(--text);
      font-weight: 600;
    }

    .legal-content a {
      color: var(--green);
      text-decoration: underline;
      text-decoration-color: transparent;
      transition: text-decoration-color var(--t);
    }

    .legal-content a:hover {
      text-decoration-color: var(--green);
    }

    .legal-box {
      background: var(--code-bg);
      border: 1px solid var(--code-border);
      border-radius: 8px;
      padding: 24px;
      margin-top: 24px;
      overflow-x: auto;
    }

    .legal-box pre {
      font-family: var(--ff-mono);
      font-size: 13px;
      line-height: 1.7;
      color: #888;
      white-space: pre-wrap;
    }

    /* Support Table */
    .legal-table-wrapper {
      overflow-x: auto;
      margin-top: 24px;
      margin-bottom: 32px;
      border: 1px solid var(--border);
      border-radius: 8px;
      background: var(--bg);
    }
    .legal-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14.5px;
      color: var(--text-2);
    }
    .legal-table th, .legal-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border);
    }
    .legal-table th {
      background: var(--bg-2);
      font-weight: 600;
      color: var(--text);
    }
    .legal-table tr:last-child td {
      border-bottom: none;
    }
    .legal-table tbody tr {
      transition: background var(--t);
    }
    .legal-table tbody tr:hover {
      background: var(--bg-2);
    }
    .status-supported {
      color: var(--green-text);
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-supported::before {
      content: '';
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--green);
    }
    .status-unsupported {
      color: #ef4444; /* red */
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .status-unsupported::before {
      content: '';
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #ef4444;
    }

    /* ─── Footer ──────────────────────────────────────────────────── */
    #footer {
      border-top: 1px solid var(--border);
      background: var(--bg-2);
    }

    .footer-inner {
      max-width: 1200px;
      margin: 0 auto;
      padding: 56px 24px 32px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 48px;
    }

    @media (max-width: 700px) {
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }

    .footer-brand-name {
      font-size: 14px;
      margin-bottom: 10px;
      color: var(--text);
      font-family: var(--ff-display);
    }

    .footer-desc {
      font-size: 13px;
      color: var(--text-2);
      line-height: 1.75;
      max-width: 280px;
    }

    .footer-col-title {
      font-family: var(--ff-mono);
      font-size: 10.5px;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      color: var(--text-3);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      font-size: 13px;
      color: var(--text-2);
      transition: color var(--t);
    }

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

    .footer-links a.ext::after {
      content: ' ↗';
      font-size: 10px;
      opacity: 0.6;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 24px;
      border-top: 1px solid var(--border);
    }

    .footer-copy {
      font-family: var(--ff-mono);
      font-size: 11px;
      color: var(--text-3);
    }

    .brand-logo-light, 
    .brand-logo-dark {
      height: 26px;
      width: auto;
      object-fit: contain;
    }[data-theme="dark"] .brand-logo-light { display: none; }
    .brand-logo-dark { display: none; }
    [data-theme="dark"] .brand-logo-dark { display: block; }