/* Cairn site — same design language as the app:
   Oracle DESIGN.md tokens (warm neutral ladder, charcoal actions,
   gold rule, brand red for the wordmark only), Arad type.
   No shadows anywhere — tonal ladder + hairlines only. */

@font-face {
  font-family: "Inter";
  src: url("/fonts/InterVariable.ttf") format("truetype");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "Arad";
  src: url("/fonts/Arad-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Arad";
  src: url("/fonts/Arad-Bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "Arad";
  src: url("/fonts/Arad-ExtraBold.ttf") format("truetype");
  font-weight: 800;
  font-display: swap;
}

:root {
  --primary: #312d2a;
  --primary-pressed: #47423e;
  --brand-mark: #c74634;
  --ink: #161513;
  --ink-deep: #211e1c;
  --canvas: #ffffff;
  --canvas-soft: #fbf9f8;
  --canvas-tint: #f5f4f2;
  --canvas-warm: #f1efed;
  --hairline: #e4e1dd;
  --divider: #e9e7e4;
  --link: #006b8f;
  --accent-gold: #f0cc71;
  --accent-gold-soft: #f7e0a1;
  --muted: #6f6a64;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Inter", "Arad", Tahoma, sans-serif;
  background: var(--canvas-soft);
  color: var(--ink);
  line-height: 1.75;
  font-size: 17px;
}
html[lang="fa"] body {
  font-family: "Arad", Tahoma, sans-serif;
  line-height: 1.9;
}

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ——— Top bar ——— */
.topbar {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand img { border-radius: 8px; }
.wordmark {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 24px;
  letter-spacing: 0.5px;
  color: var(--brand-mark);
  direction: ltr;
}
.topbar nav { display: flex; gap: 22px; align-items: center; }
.topbar nav a { color: var(--ink-deep); font-size: 15.5px; }
.gh-link { display: inline-flex; align-items: center; }
.gh-link:hover { color: var(--brand-mark); text-decoration: none; }
.gh-btn { display: inline-flex; align-items: center; gap: 8px; }
@media (max-width: 560px) {
  .topbar nav a:not(:last-child) { display: none; }
}

/* ——— Hero ——— */
.hero {
  background: var(--canvas);
  border-bottom: 1px solid var(--divider);
  padding: 72px 0 56px;
}
.kicker {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(30px, 5.4vw, 46px);
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink);
}
.hero h1 em {
  font-style: normal;
  color: var(--brand-mark);
}
.gold-rule {
  width: 40px;
  height: 4px;
  background: var(--accent-gold);
  border-radius: 2px;
  margin: 22px 0;
}
.lede {
  margin: 0;
  max-width: 680px;
  font-size: 18.5px;
  color: var(--ink-deep);
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.version-line {
  margin: 18px 0 0;
  font-size: 14.5px;
  color: var(--muted);
}

/* ——— Buttons (Oracle: charcoal, radius 4, no shadow) ——— */
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 16px;
  line-height: 1.7;
  border: 1px solid var(--primary);
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-pressed); }
.btn-ghost {
  background: transparent;
  color: var(--primary);
}
.btn-ghost:hover { background: var(--canvas-tint); }

/* ——— Sections ——— */
section { padding: 56px 0; }
.band {
  background: var(--canvas-tint);
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
}
h2 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 800;
}
.section-lede { margin: 0 0 18px; color: var(--muted); }

.roles {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0 0 30px;
}
.roles li {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 4px 16px;
  font-size: 15px;
  font-weight: 700;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 14px;
}
.card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px 22px;
}
.card h3 { margin: 0 0 6px; font-size: 18.5px; font-weight: 800; }
.card p { margin: 0; color: var(--ink-deep); font-size: 16px; }

.steps {
  list-style: none;
  padding: 0;
  margin: 8px 0 34px;
  display: grid;
  gap: 14px;
}
.steps li {
  display: flex;
  gap: 16px;
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px 22px;
}
.step-n {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-gold-soft);
  color: var(--ink);
  font-weight: 800;
  font-size: 19px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps h3 { margin: 0 0 4px; font-size: 18.5px; font-weight: 800; }
.steps p { margin: 0; color: var(--ink-deep); font-size: 16px; }
.center { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* ——— Footer ——— */
footer {
  background: var(--ink);
  color: #e9e7e4;
  padding: 26px 0;
}
.foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  align-items: center;
  font-size: 15px;
}
footer a { color: var(--accent-gold-soft); }
footer .wordmark { font-size: 20px; }
.foot-links { display: inline-flex; gap: 18px; align-items: center; margin-inline-start: auto; }
footer .gh-link { color: #e9e7e4; }
footer .gh-link:hover { color: var(--accent-gold-soft); }