:root {
    --ink: #10192E;
    --ink-soft: #4B5768;
    --ink-faint: #7C8798;
    --paper: #F3F5F9;
    --surface: #FFFFFF;
    --surface-raised: #FFFFFF;
    --gold: #F0A400;
    --gold-ink: #8A5A08;
    --gold-tint: #FCEACB;
    --line: #E1E5EC;
    --line-strong: #C9D0DC;
    --mono-tint: #EDF0F5;
    --danger: #B3261E;
    color-scheme: light;
  }
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --ink: #ECEFF5;
      --ink-soft: #B0B9C9;
      --ink-faint: #7C8798;
      --paper: #0A1220;
      --surface: #101A2E;
      --surface-raised: #142138;
      --gold: #F5B94B;
      --gold-ink: #F5B94B;
      --gold-tint: rgba(245, 185, 75, 0.14);
      --line: #223047;
      --line-strong: #2D3D58;
      --mono-tint: #0D1728;
      --danger: #FF6B60;
      color-scheme: dark;
    }
  }
  :root[data-theme="dark"] {
    --ink: #ECEFF5;
    --ink-soft: #B0B9C9;
    --ink-faint: #7C8798;
    --paper: #0A1220;
    --surface: #101A2E;
    --surface-raised: #142138;
    --gold: #F5B94B;
    --gold-ink: #F5B94B;
    --gold-tint: rgba(245, 185, 75, 0.14);
    --line: #223047;
    --line-strong: #2D3D58;
    --mono-tint: #0D1728;
    --danger: #FF6B60;
    color-scheme: dark;
  }

  * { box-sizing: border-box; }
  body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'Work Sans', system-ui, sans-serif;
    line-height: 1.5;
  }
  h1, h2, h3, .display {
    font-family: 'Poppins', system-ui, sans-serif;
    font-weight: 800;
    letter-spacing: 0.2px;
    text-wrap: balance;
    margin: 0;
  }
  .mono {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
  }
  a { color: inherit; }
  p { color: var(--ink-soft); }
  img { max-width: 100%; }
  [hidden] { display: none !important; }
  button { font-family: inherit; cursor: pointer; }
  :focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
  @media (prefers-reduced-motion: reduce) {
    * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  }

  .wrap { max-width: 1080px; margin: 0 auto; padding-inline: 24px; }

  /* ---------- Nav ---------- */
  header.site-nav {
    position: sticky;
    top: env(safe-area-inset-top, 0px);
    z-index: 40;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
  }
  .nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-block: 14px;
    flex-wrap: wrap;
  }
  .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
  .brand-mark { height: 46px; width: 46px; flex-shrink: 0; display: block; }
  nav.tabs { display: flex; gap: 4px; }
  nav.tabs button {
    background: none;
    border: none;
    border-radius: 8px;
    padding: 9px 14px;
    font-size: 14.5px;
    font-weight: 600;
    color: var(--ink-soft);
    position: relative;
  }
  nav.tabs button:hover { color: var(--ink); background: var(--paper); }
  nav.tabs button[aria-selected="true"] { color: var(--ink); }
  nav.tabs button[aria-selected="true"]::after {
    content: "";
    position: absolute;
    left: 14px; right: 14px; bottom: 2px;
    height: 3px;
    border-radius: 2px;
    background: var(--gold);
  }

  /* ---------- Hero ---------- */
  .hero {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
  }
  .hero-trace {
    position: absolute;
    inset: 0;
    opacity: 0.5;
    pointer-events: none;
  }
  :root:not([data-theme="light"]) .hero-trace { opacity: 0.35; }
  .hero-inner {
    position: relative;
    padding-block: 64px 56px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    max-width: 640px;
  }
  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 12.5px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--gold-ink);
    background: var(--gold-tint);
    border-radius: 999px;
    padding: 6px 12px;
    width: fit-content;
  }
  .hero h1 { font-size: clamp(34px, 5.5vw, 52px); line-height: 1.05; }
  .hero p.lead { font-size: 17px; max-width: 52ch; }
  .hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 6px; }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 9px;
    padding: 11px 18px;
    font-weight: 600;
    font-size: 14.5px;
    border: 1px solid transparent;
    text-decoration: none;
  }
  .btn-primary { background: var(--gold); color: #1A1200; }
  .btn-primary:hover { filter: brightness(1.05); }
  .btn-secondary { background: transparent; color: var(--ink); border-color: var(--line-strong); }
  .btn-secondary:hover { background: var(--paper); }

  /* ---------- Sections generic ---------- */
  section.page { padding-block: 56px; }
  .section-head { max-width: 640px; margin-bottom: 32px; }
  .section-head h2 { font-size: clamp(24px, 3.2vw, 30px); }
  .section-head p { margin-top: 8px; font-size: 15.5px; }
  .kicker {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 12px;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    color: var(--ink-faint);
  }

  /* ---------- What we do ---------- */
  .activities {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
  }
  .activity-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .activity-card .icon {
    width: 36px; height: 36px;
    border-radius: 9px;
    background: var(--gold-tint);
    display: flex; align-items: center; justify-content: center;
    color: var(--gold-ink);
  }
  .activity-card h3 { font-size: 16.5px; font-weight: 700; }
  .activity-card p { font-size: 14px; margin: 0; }

  /* ---------- Gallery ---------- */
  .gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 14px;
  }
  .gallery-tile {
    aspect-ratio: 4 / 3;
    border-radius: 12px;
    border: 1.5px dashed var(--line-strong);
    background: var(--mono-tint);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-align: center;
    padding: 14px;
    color: var(--ink-faint);
  }
  .gallery-tile svg { width: 26px; height: 26px; opacity: 0.7; }
  .gallery-tile span { font-size: 12.5px; font-weight: 600; color: var(--ink-soft); }

  /* ---------- Join ---------- */
  .join-grid {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: 40px;
    align-items: start;
  }
  @media (max-width: 760px) { .join-grid { grid-template-columns: 1fr; } }
  .benefits { display: flex; flex-direction: column; gap: 14px; }
  .benefit {
    display: flex; gap: 12px; align-items: flex-start;
  }
  .benefit .tick {
    width: 22px; height: 22px; border-radius: 999px;
    background: var(--gold-tint); color: var(--gold-ink);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; margin-top: 2px;
  }
  .benefit p { margin: 0; font-size: 14.5px; color: var(--ink-soft); }
  .benefit strong { color: var(--ink); }

  .form-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 28px;
  }
  .field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
  .field label { font-size: 13px; font-weight: 600; color: var(--ink); }
  .field input[type="text"],
  .field input[type="email"],
  .field select,
  .field textarea {
    font-family: inherit;
    font-size: 14.5px;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--line-strong);
    background: var(--paper);
    color: var(--ink);
    width: 100%;
  }
  .field textarea { resize: vertical; min-height: 72px; }
  .field input:focus, .field select:focus, .field textarea:focus {
    outline: 2px solid var(--gold); outline-offset: 1px; border-color: transparent;
  }
  .check-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 8px 12px;
  }
  .check-row { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--ink-soft); }
  .check-row input { accent-color: var(--gold); width: 16px; height: 16px; }
  .req { color: var(--danger); }
  .form-note { font-size: 12.5px; color: var(--ink-faint); margin-top: 4px; }
  .form-error {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--danger);
    background: color-mix(in srgb, var(--danger) 12%, transparent);
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 16px;
  }
  .btn-primary:disabled { opacity: 0.65; cursor: default; }

  .confirm-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 40px 28px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  .confirm-panel .icon-ok {
    width: 48px; height: 48px; border-radius: 999px;
    background: var(--gold-tint); color: var(--gold-ink);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 4px;
  }

  /* ---------- Docs ---------- */
  .docs-grid {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 28px;
    align-items: start;
  }
  @media (max-width: 760px) { .docs-grid { grid-template-columns: 1fr; } }
  .docs-index { display: flex; flex-direction: column; gap: 4px; position: sticky; top: 84px; }
  .docs-index button {
    background: none; border: none; text-align: left;
    padding: 10px 12px; border-radius: 8px;
    font-size: 14px; font-weight: 600; color: var(--ink-soft);
    display: flex; align-items: center; justify-content: space-between; gap: 8px;
  }
  .docs-index button:hover { background: var(--paper); color: var(--ink); }
  .docs-index button[aria-selected="true"] { background: var(--gold-tint); color: var(--gold-ink); }
  .status-chip {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 10.5px;
    letter-spacing: 0.5px;
    padding: 2px 7px;
    border-radius: 999px;
    background: var(--mono-tint);
    color: var(--ink-faint);
    flex-shrink: 0;
  }
  .doc-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 28px;
  }
  .doc-panel-head {
    display: flex; justify-content: space-between; align-items: flex-start;
    gap: 16px; flex-wrap: wrap;
    border-bottom: 1px solid var(--line);
    padding-bottom: 16px; margin-bottom: 20px;
  }
  .doc-panel-head h3 { font-size: 20px; }
  .badge-template {
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 11px; letter-spacing: 0.5px;
    background: var(--gold-tint); color: var(--gold-ink);
    border-radius: 999px; padding: 4px 10px;
    white-space: nowrap;
  }
  table.spec {
    width: 100%;
    border-collapse: collapse;
    font-family: 'IBM Plex Mono', ui-monospace, monospace;
    font-size: 13px;
  }
  table.spec caption { text-align: left; font-size: 11.5px; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 8px; }
  table.spec th, table.spec td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
  table.spec th { color: var(--ink-faint); font-weight: 600; font-size: 11.5px; letter-spacing: 0.5px; text-transform: uppercase; }
  .spec-wrap { overflow-x: auto; margin-bottom: 22px; }
  .doc-panel p { font-size: 14.5px; }
  .doc-empty { color: var(--ink-faint); font-size: 14px; padding: 8px 0 24px; }

  /* ---------- Footer ---------- */
  footer {
    border-top: 1px solid var(--line);
    padding-block: 28px;
    padding-bottom: calc(28px + env(safe-area-inset-bottom, 0px));
  }
  footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
  footer p { font-size: 13px; color: var(--ink-faint); margin: 0; }