:root {
  --bg: #ffffff;
  --bg-2: #f6f3ee;
  --surface: #ffffff;
  --surface-2: #f4f1ec;
  --line: rgba(31, 35, 40, 0.14);
  --line-strong: rgba(31, 35, 40, 0.3);
  --ink: #1f2328;
  --ink-soft: #3b434b;
  --muted: #5a626b;
  --accent: #d9480f;
  --accent-ink: #ffffff;
  --accent-2: #f76707;
  --accent-glow: rgba(217, 72, 15, 0.25);
  --radius: 6px;
  --font-display: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'Inter', 'Segoe UI', system-ui, sans-serif;
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.1; letter-spacing: -0.01em; font-weight: 600; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--font-mono); }
.ital { font-style: italic; font-weight: 400; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255, 0.82);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.navbar { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 12px; font-family: var(--font-display); font-weight: 600; font-size: 21px; letter-spacing: 0.01em; color: var(--ink); }
.brand-mark {
  width: 38px; height: 38px; border-radius: 50%; flex-shrink: 0;
  display: grid; place-items: center;
  background: linear-gradient(145deg, var(--accent-2), var(--accent) 55%, #b53a08);
  color: var(--accent-ink);
  font-family: var(--font-display); font-size: 14px; font-weight: 700;
  box-shadow: 0 0 0 1px var(--line-strong), 0 0 22px var(--accent-glow);
}
.brand small { color: var(--muted); font-family: var(--font-mono); font-size: 11px; font-weight: 400; margin-left: 2px; }
.nav-links { display: flex; align-items: center; gap: 34px; list-style: none; }
.nav-links a { font-size: 12.5px; color: var(--ink-soft); font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; transition: color .2s; }
.nav-links a:hover { color: var(--accent); }
.nav-links a.btn-primary, .nav-links a.btn-primary:hover { color: var(--accent-ink); font-weight: 600; }
.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); border-radius: 2px; width: 40px; height: 40px; cursor: pointer; color: var(--ink); }
.nav-toggle span { display: block; width: 18px; height: 1.5px; background: currentColor; margin: 4px auto; transition: transform .25s, opacity .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 15px 30px; border-radius: var(--radius); font-weight: 600; font-size: 12.5px;
  letter-spacing: 0.1em; text-transform: uppercase; border: 1px solid transparent; cursor: pointer; font-family: var(--font-body);
  transition: background .2s, border-color .2s, color .2s, box-shadow .25s;
}
.btn-primary { background: linear-gradient(135deg, var(--accent-2), var(--accent)); color: var(--accent-ink); border-color: var(--accent); }
.btn-primary:hover { box-shadow: 0 0 30px var(--accent-glow); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 10px 20px; font-size: 11px; }

/* Sections */
.section { padding: 120px 0; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 20px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; }
.section-head { max-width: 640px; margin-bottom: 64px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow::after { content: ""; width: 22px; height: 1px; background: currentColor; }
.section-head h2 { font-size: clamp(32px, 4.2vw, 48px); margin-bottom: 18px; }
.section-head p { color: var(--ink-soft); font-size: 17px; }

.card {
  background: linear-gradient(175deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 46px 0; color: var(--muted); font-size: 12.5px; }
.footer-row { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.footer-row nav { display: flex; gap: 26px; flex-wrap: wrap; }
.site-footer a:hover { color: var(--accent); }

/* Simple pages */
.page-bg { min-height: 100vh; display: flex; flex-direction: column; background: radial-gradient(900px 500px at 85% -10%, rgba(217,72,15,0.1), transparent 70%), var(--bg); }
.page-bg main { flex: 1; }
.back-link { font-size: 13px; letter-spacing: 0.04em; color: var(--ink-soft); }
.back-link:hover { color: var(--accent); }
.center-box { max-width: 560px; margin: 0 auto; padding: 140px 24px; text-align: center; }
.center-box .code { font-family: var(--font-mono); font-size: 11.5px; color: var(--accent); margin-bottom: 22px; letter-spacing: 0.14em; text-transform: uppercase; }
.center-box h1 { font-size: clamp(34px, 5.5vw, 50px); margin-bottom: 22px; }
.center-box p { color: var(--ink-soft); margin-bottom: 34px; }
.center-box .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.prose { max-width: 760px; margin: 0 auto; padding: 90px 24px 120px; }
.prose h1 { font-size: clamp(32px, 4.6vw, 46px); margin-bottom: 46px; }
.prose .card { padding: 42px; }
.prose h2 { font-family: var(--font-display); font-size: 19px; margin: 32px 0 10px; font-weight: 600; color: var(--accent-2); }
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--ink-soft); font-size: 15.5px; }
.prose p + p { margin-top: 12px; }
.prose a { color: var(--accent); }
.field { margin-bottom: 20px; text-align: left; }
.field label { display: block; font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); margin-bottom: 9px; letter-spacing: 0.06em; text-transform: uppercase; }
.field input, .field textarea {
  width: 100%; background: rgba(0,0,0,0.08); border: 1px solid var(--line-strong); border-radius: var(--radius);
  color: var(--ink); font-family: var(--font-body); font-size: 15px; padding: 13px 14px;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 76px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 8px 24px 22px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links li a { display: block; padding: 15px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .nav-links li:last-child a { border-bottom: none; margin-top: 14px; text-align: center; }
  .section { padding: 80px 0; }
  .prose .card { padding: 26px 20px; }
}
@media (max-width: 480px) {
  .container { padding: 0 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}