:root {
    --bg: #17171b;
    --bg-raised: #1e1e24;
    --bg-inset: #101013;
    --text: #e8eaee;
    --text-dim: #9a9aa4;
    --text-faint: #616168;
    --border: #2c2c34;
    --cask-dark: #C9A038;
    --cask-light: #E6C260;
    --accent-text: #17171b;
    --disk-body: #3a3a42;
    --disk-shade: #2a2a30;
    --disk-hi: #4a4a54;
    --disk-shutter: #c9ccd4;
    --disk-shutter-dk: #8a8f9c;
    --disk-label: #e8eaee;
    --disk-label-line: #a8adb8;
    --disk-window: #26262c;
    --shadow-color: rgba(0,0,0,0.35);
  }

  [data-theme="light"] {
    --bg: #f6f2e7;
    --bg-raised: #fbf8f0;
    --bg-inset: #ece5d3;
    --text: #262420;
    --text-dim: #6b665c;
    --text-faint: #9b9587;
    --border: #ddd4bf;
    --cask-dark: #a97e18;
    --cask-light: #c99b2e;
    --accent-text: #fbf8f0;
    --disk-body: #cfc8b6;
    --disk-shade: #b7ae98;
    --disk-hi: #e0dac9;
    --disk-shutter: #4a4642;
    --disk-shutter-dk: #6b665c;
    --disk-label: #262420;
    --disk-label-line: #726c60;
    --disk-window: #3a362f;
    --shadow-color: rgba(120,105,60,0.15);
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    transition: background 0.25s ease, color 0.25s ease;
    overflow-x: hidden;
  }

  .mono { font-family: 'JetBrains Mono', monospace; }

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

  /* ---------- Navbar ---------- */
  nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 40px;
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
  }

  .nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
  }

  .nav-brand .dot { color: var(--cask-dark); }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
  }

  .nav-links a {
    font-size: 0.9rem;
    color: var(--text-dim);
    font-weight: 500;
    transition: color 0.15s ease;
  }
  .nav-links a:hover { color: var(--text); }

  .nav-right {
    display: flex;
    align-items: center;
    gap: 18px;
  }

  .btn-gh {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    font-weight: 500;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-dim);
    transition: all 0.15s ease;
  }
  .btn-gh:hover { border-color: var(--cask-dark); color: var(--text); }

  .theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-raised);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.15s ease;
    color: var(--text);
  }
  .theme-toggle:hover { border-color: var(--cask-dark); }
  .theme-toggle svg { width: 18px; height: 18px; }
  .theme-toggle .sun { display: none; }
  [data-theme="light"] .theme-toggle .sun { display: block; }
  [data-theme="light"] .theme-toggle .moon { display: none; }

  /* ---------- Hero ---------- */
  .hero {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 60px;
    align-items: center;
    max-width: 1180px;
    margin: 0 auto;
    padding: 90px 40px 100px;
  }

  .eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: var(--cask-dark);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .eyebrow::before {
    content: "";
    width: 6px; height: 6px;
    background: var(--cask-dark);
    display: inline-block;
  }

  h1 {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 800;
    font-size: 3.1rem;
    line-height: 1.08;
    letter-spacing: -0.02em;
    margin-bottom: 22px;
  }
  h1 .hl { color: var(--cask-dark); }

  .hero-sub {
    font-size: 1.08rem;
    color: var(--text-dim);
    max-width: 480px;
    margin-bottom: 34px;
  }

  .hero-cta { display: flex; gap: 14px; margin-bottom: 40px; }

  .btn-primary {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 0.9rem;
    padding: 13px 22px;
    background: var(--cask-dark);
    color: var(--accent-text);
    border-radius: 7px;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
  }
  .btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px -4px var(--shadow-color); }

  .btn-secondary {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 13px 22px;
    border: 1px solid var(--border);
    border-radius: 7px;
    color: var(--text);
    transition: border-color 0.15s ease;
  }
  .btn-secondary:hover { border-color: var(--cask-dark); }

  .hero-stats {
    display: flex;
    gap: 30px;
    font-family: 'JetBrains Mono', monospace;
  }
  .hero-stat .num { font-size: 1.3rem; font-weight: 700; color: var(--text); }
  .hero-stat .label { font-size: 0.74rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.04em; }

  /* ---------- Hero image ---------- */
  .disk-wrap {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .disk-img { width: 100%; max-width: 300px; filter: drop-shadow(0 30px 40px var(--shadow-color)); }

  /* ---------- Terminal block ---------- */
  .terminal {
    max-width: 900px;
    margin: 0 auto 100px;
    padding: 0 40px;
  }
  .term-window {
    background: var(--bg-inset);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
  }
  .term-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-raised);
    border-bottom: 1px solid var(--border);
  }
  .term-bar .dotc { width: 10px; height: 10px; border-radius: 50%; }
  .term-bar .r { background: #e0645a; }
  .term-bar .y { background: var(--cask-dark); }
  .term-bar .g { background: #5cb87a; }
  .term-bar .fname { margin-left: 8px; font-family: 'JetBrains Mono', monospace; font-size: 0.78rem; color: var(--text-faint); }
  .term-bar .copy-btn {
    margin-left: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    font-weight: 500;
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 5px;
    background: var(--bg-inset);
    color: var(--text-dim);
    cursor: pointer;
    transition: border-color 0.15s ease, color 0.15s ease;
  }
  .term-bar .copy-btn:hover { border-color: var(--cask-dark); color: var(--text); }

  .exe-link { color: var(--cask-dark); }
  .exe-link:hover { text-decoration: underline; }

  .term-body {
    padding: 24px 28px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.88rem;
    line-height: 1.7;
    overflow-x: auto;
  }
  .c-kw { color: var(--cask-dark); }
  .c-type { color: #7aa8d4; }
  [data-theme="light"] .c-type { color: #4a7bab; }
  .c-str { color: #7ec488; }
  .c-com { color: var(--text-faint); font-style: italic; }
  .c-fn { color: var(--cask-light); }
  .c-out { color: var(--text-dim); }

  /* ---------- Features ---------- */
  .section {
    max-width: 1180px;
    margin: 0 auto;
    padding: 60px 40px;
  }
  .section-head { margin-bottom: 48px; max-width: 560px; }
  .section-eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: var(--cask-dark);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
  }
  .section-title {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 1.9rem;
    letter-spacing: -0.01em;
  }
  .section-desc { color: var(--text-dim); margin-top: 12px; font-size: 1rem; }

  .grid3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
  }
  .feature {
    background: var(--bg-raised);
    padding: 30px 26px;
  }
  .feature .ficon {
    width: 34px; height: 34px;
    margin-bottom: 18px;
    color: var(--cask-dark);
  }
  .feature h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.02rem;
    margin-bottom: 10px;
  }
  .feature p { color: var(--text-dim); font-size: 0.92rem; }

  /* ---------- Milestones ---------- */
  .milestones {
    max-width: 1180px;
    margin: 0 auto;
    padding: 20px 40px 100px;
  }
  .m-row {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 24px;
    padding: 20px 0;
    border-top: 1px solid var(--border);
  }
  .m-row:last-child { border-bottom: 1px solid var(--border); }
  .m-status {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    height: fit-content;
    padding: 4px 0;
  }
  .m-status.done { color: #5cb87a; }
  .m-status.wip { color: var(--cask-dark); }
  .m-status.next { color: var(--text-faint); }
  .m-title { font-weight: 600; margin-bottom: 4px; }
  .m-desc { color: var(--text-dim); font-size: 0.9rem; }

  /* ---------- Footer ---------- */
  footer {
    border-top: 1px solid var(--border);
    padding: 40px;
  }
  .footer-inner {
    max-width: 1180px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
  }
  .footer-inner .mono { color: var(--text-faint); font-size: 0.82rem; }
  .footer-links { display: flex; gap: 24px; }
  .footer-links a { color: var(--text-dim); font-size: 0.85rem; }
  .footer-links a:hover { color: var(--cask-dark); }

  @media (max-width: 860px) {
    .hero { grid-template-columns: 1fr; padding-top: 50px; }
    .disk-wrap { order: -1; max-width: 220px; margin: 0 auto; }
    h1 { font-size: 2.2rem; }
    .grid3 { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    nav { padding: 16px 20px; }
    .section, .terminal, .milestones { padding-left: 20px; padding-right: 20px; }
  }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; }
  }

  :focus-visible {
    outline: 2px solid var(--cask-dark);
    outline-offset: 2px;
  }