@import url('https://fonts.googleapis.com/css2?family=Google+Sans+Code:ital,wght@0,300;0,400;0,500;1,300&family=IBM+Plex+Serif:wght@300;400&display=swap');

  :root {
    --bg: #0e0e0e;
    --bg2: #161616;
    --bg3: #1e1e1e;
    --fg: #d4d0c8;
    --fg2: #8a8880;
    --fg3: #525050;
    --accent: #861f41;
    --accent2: #e87722;
    --blue: #4a7fa5;
    --blue2: #2a5f85;
    --green: #4a7a5a;
    --border: #2a2a2a;
    --border2: #333;
    --mono: 'Google Sans Code', monospace;
    --serif: 'IBM Plex Serif', serif;
  }
  .light {
    --bg: #ede9e0;
    --bg2: #e4ded1;
    --bg3: #d2c9b5;
    --fg: #1a1816;
    --fg2: #5a5650;
    --fg3: #9a9690;
    --accent: #861f41;
    --accent2: #c05a10;
    --blue: #1a4f75;
    --blue2: #0a3f65;
    --green: #2a5a3a;
    --border: #c4baa6;
    --border2: #b8ae9a;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    background: var(--bg);
    transition: background 0.2s;
    zoom: 1.2;
  }

  .root {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.6;
    /* body zoom is 1.2, so 100vh would render 20% taller than the screen */
    min-height: calc(100vh / 1.2);
    transition: background 0.2s, color 0.2s;
    display: flex;
    flex-direction: column;
  }

  /* TOP BAR */
  .topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    padding: 0 16px;
    height: 28px;
    background: var(--bg2);
    font-size: 11px;
    color: var(--fg2);
    letter-spacing: 0.04em;
    overflow: hidden;
  }
  .topbar-left { display: flex; gap: 16px; align-items: center; }
  .topbar-right { display: flex; gap: 12px; align-items: center; }
  .topbar a { color: var(--fg3); text-decoration: none; }
  .topbar a:hover { color: var(--fg); }
  /* NAV */
  .nav {
    display: flex;
    align-items: stretch;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    height: 48px;
  }
  .nav-logo {
    display: flex; align-items: center; padding: 4px 20px;
    border-right: 1px solid var(--border);
    gap: 8px; white-space: nowrap;
  }
  .nav-logo img { height: 30px; width: auto; display: block; }
  .nav-logo:hover { background: var(--bg2); }
  .nav-links {
    display: flex; align-items: stretch; flex: 1;
  }
  .nav-links a {
    display: flex; align-items: center;
    padding: 0 18px;
    font-size: 13px;
    color: var(--fg2);
    text-decoration: none;
    letter-spacing: 0.05em;
    border-right: 1px solid var(--border);
    white-space: nowrap;
  }
  .nav-links a:hover { color: var(--fg); background: var(--bg2); }
  .nav-links a.active { color: var(--fg); border-bottom: 1px solid var(--accent2); }
  .nav-right {
    margin-left: auto;
    display: flex; align-items: center;
    padding: 0 14px;
    gap: 12px;
  }

  /* TOGGLE */
  .toggle-btn {
    background: var(--bg); border: 1px solid var(--border2);
    color: var(--fg); font-family: var(--mono); font-size: 11px;
    padding: 3px 10px; cursor: pointer; letter-spacing: 0.06em;
    white-space: nowrap;
  }
  .toggle-btn:hover { color: var(--accent2); border-color: var(--accent2); }
  .toggle-icon { font-size: 15px; line-height: 1; vertical-align: -2px; }

  /* HERO */
  .hero {
    border-bottom: 1px solid var(--border);
    min-height: 220px;
    position: relative;
    overflow: hidden;
  }
  #halftone-hero {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
  }
  .hero-gradient {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(-90deg, var(--bg) 0%, transparent 60%);
    z-index: 1;
    pointer-events: none;
  }
  .hero-main {
    padding: 24px 20px 20px;
    display: flex; flex-direction: column; justify-content: space-between;
    position: relative;
    z-index: 2;
  }
  .hero-tag {
    font-size: 10px; letter-spacing: 0.12em; color: var(--accent);
    text-transform: uppercase; margin-bottom: 12px;
  }
  .hero-title {
    font-family: var(--serif);
    font-size: 30px; font-weight: 300;
    line-height: 1.2;
    color: var(--fg);
    letter-spacing: -0.01em;
    margin-bottom: 14px;
  }
  .hero-title em { font-style: italic; color: var(--fg2); }
  .hero-desc .hero-break { display: block; margin-top: 0.3em; }
  .hero-desc {
    font-size: 12px; color: var(--fg); line-height: 1.7;
    max-width: 520px;
    margin-bottom: 16px;
    /* halo of the page bg lifts the text off the halftone dots */
    text-shadow:
      0 0 4px var(--bg),
      0 0 8px var(--bg),
      0 0 14px var(--bg);
  }
  .hero-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
  .btn-primary {
    background: var(--accent); color: #fff;
    border: none; font-family: var(--mono);
    font-size: 10px; letter-spacing: 0.08em;
    padding: 5px 14px; cursor: pointer;
    transition: background 0.15s;
    text-decoration: none;
  }
  .btn-primary:hover { background: var(--accent2); text-decoration: underline; }
  .btn-secondary {
    background: none; color: var(--fg2);
    border: 1px solid var(--border2); font-family: var(--mono);
    font-size: 10px; letter-spacing: 0.08em;
    padding: 5px 14px; cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
    text-decoration: none;
  }
  .btn-secondary:hover { color: var(--fg); border-color: var(--fg3); text-decoration: underline; }

  /* UTILITY */
  .link { color: var(--blue); text-decoration: underline; cursor: pointer; }
  .link:hover { color: var(--accent2); }
  .accent { color: var(--accent2); }
  .meta { color: var(--fg3); font-size: 10px; }

  /* FOOTER */
  .footer {
    margin-top: auto;
    display: flex; justify-content: space-between; align-items: center;
    padding: 8px 16px;
    font-size: 10px; color: var(--fg3);
    border-top: 1px solid var(--border);
    background: var(--bg2);
    flex-wrap: wrap;
    gap: 8px;
  }

  /* RESPONSIVE BREAKPOINT SYSTEM
   * 
   * Convention (applied across all CSS files):
   *   900px  — Small desktop / tablet landscape
   *   768px  — Tablet portrait
   *   600px  — Large phone
   *   400px  — Small phone
   *
   * Page-specific responsive rules live in their respective CSS files.
   * Global rules (topbar, nav, hero, toggle, footer) live here.
   * All touch targets should be ≥44px on mobile (Apple HIG).
   */
  @media (max-width: 900px) {
    .nav { height: auto; flex-wrap: wrap; }
    /* deliberate two-row nav: centered logo on top, links as an even row below */
    .nav-logo {
      width: 100%;
      justify-content: center;
      padding: 8px 20px;
      border-right: none;
      border-bottom: 1px solid var(--border);
    }
    .nav-links { overflow: visible; }
    .nav-links a {
      flex: 1;
      justify-content: center;
      min-height: 44px;
    }
    .nav-links a:last-child { border-right: none; }
    .nav-right { display: none; }
    .footer { flex-direction: column; text-align: center; }
  }
  @media (max-width: 600px) {
    .topbar-left span:not(:first-child) { display: none; }
    .topbar-right a:not(:last-of-type) { display: none; }
    .hero-main { padding: 20px 20px; }
    .hero-title { font-size: 22px; }
    .hero-desc { max-width: 100%; }
    .hero-actions { flex-direction: column; align-items: flex-start; }
    .nav-links a {
      padding: 0 10px;
      min-height: 44px;
    }
    .toggle-btn {
      padding: 6px 12px;
      font-size: 12px;
    }
  }
  @media (max-width: 400px) {
    .hero-main { padding: 16px 16px; }
    .hero-title { font-size: 20px; }
  }