/* RidgeOS — website styles
   Brand: #3871eb (base) / #c0d1fa (facet). Dark-first, with a light theme toggle. */

:root {
  --brand: #3871eb;
  --brand-2: #6f9bff;
  --facet: #c0d1fa;

  --bg: #0b0d10;
  --bg-2: #0e1116;
  --surface: #12151a;
  --surface-2: #161a20;
  --line: #232a33;
  --fg: #e9edf3;
  --muted: #9aa4b2;
  --faint: #6b7480;

  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1120px;
  --shadow: 0 12px 40px -18px rgba(0, 0, 0, 0.7);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

:root[data-theme="light"] {
  --bg: #f6f7f9;
  --bg-2: #eef1f5;
  --surface: #ffffff;
  --surface-2: #f4f6f9;
  --line: #e2e6ec;
  --fg: #0d1117;
  --muted: #55606e;
  --faint: #8a94a2;
  --shadow: 0 12px 40px -20px rgba(20, 30, 60, 0.28);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--brand-2); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; }
p { margin: 0 0 1em; color: var(--muted); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- background flourish ---------- */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60% 50% at 78% -8%, rgba(56, 113, 235, 0.22), transparent 70%),
    radial-gradient(45% 40% at 8% 4%, rgba(111, 155, 255, 0.14), transparent 70%);
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(160%) blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 64px;
}
.brand-link { display: inline-flex; align-items: center; }
.brand-link img { height: 26px; display: block; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-links a {
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 550;
}
.nav-links a:hover { color: var(--fg); background: var(--surface-2); text-decoration: none; }
.nav-links .active { color: var(--fg); }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  font-size: 16px;
}
.icon-btn:hover { border-color: var(--brand); }

.nav-toggle { display: none; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: #2f63d6; }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--fg); }
.btn-ghost:hover { border-color: var(--brand); background: var(--surface); }

/* ---------- hero ---------- */
.hero { padding: 92px 0 64px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--brand-2);
  background: color-mix(in srgb, var(--brand) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--brand) 35%, transparent);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero p.lead { font-size: 1.18rem; max-width: 44ch; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin-top: 34px;
  color: var(--faint);
  font-size: 0.9rem;
}
.hero-meta strong { color: var(--fg); font-variant-numeric: tabular-nums; }

.hero-art { display: flex; justify-content: center; }
.hero-art img { width: min(320px, 80%); filter: drop-shadow(0 24px 60px rgba(56, 113, 235, 0.35)); }

/* ---------- terminal ---------- */
.terminal {
  background: #0a0c10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-family: var(--mono);
  font-size: 0.88rem;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 14px;
  background: #0e1218;
  border-bottom: 1px solid var(--line);
}
.terminal-bar .dot { width: 11px; height: 11px; border-radius: 50%; background: #2b333f; }
.terminal-bar .t-title { margin-left: 8px; color: #6b7480; font-size: 0.78rem; }
.terminal-body { padding: 18px 18px 20px; color: #cdd6e2; overflow-x: auto; }
.terminal-body pre { margin: 0; white-space: pre; }
.terminal-body .prompt { color: var(--brand-2); }
.terminal-body .cmd { color: #eef2f8; }
.terminal-body .out { color: #7f8b9a; }
.terminal-body .ok { color: #57c98b; }

/* ---------- sections ---------- */
section { padding: 64px 0; }
.section-head { max-width: 62ch; margin-bottom: 40px; }
.section-head p { font-size: 1.05rem; }
.kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-2);
  margin-bottom: 10px;
}

/* ---------- feature grid ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.card .ic {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: color-mix(in srgb, var(--brand) 16%, transparent);
  color: var(--brand-2);
  margin-bottom: 16px;
}
.card h3 { margin-bottom: 6px; }
.card p { margin: 0; font-size: 0.96rem; }

/* ---------- platforms ---------- */
.platform-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  display: flex;
  flex-direction: column;
}
.platform-card .tag {
  align-self: flex-start;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  color: var(--muted);
  margin-bottom: 18px;
}
.platform-card h3 { font-size: 1.35rem; }
.spec {
  list-style: none;
  padding: 0;
  margin: 18px 0 24px;
  display: grid;
  gap: 10px;
}
.spec li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  font-size: 0.92rem;
  color: var(--muted);
}
.spec li:last-child { border-bottom: 0; padding-bottom: 0; }
.spec li b { color: var(--fg); font-weight: 600; text-align: right; }
.platform-card .btn { margin-top: auto; align-self: flex-start; }

/* ---------- steps ---------- */
.steps { counter-reset: step; display: grid; gap: 18px; }
.step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 18px;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-family: var(--mono);
}
.step h3 { margin-bottom: 4px; }
.step p { margin: 0 0 12px; }
.step p:last-child { margin-bottom: 0; }

/* ---------- code block ---------- */
pre.code {
  background: #0a0c10;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.86rem;
  color: #cdd6e2;
  margin: 0;
}
pre.code .c { color: #6b7480; }
code.inline {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1px 6px;
}

/* ---------- callout ---------- */
.callout {
  display: flex;
  gap: 14px;
  background: color-mix(in srgb, var(--brand) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--brand) 30%, var(--line));
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 0.94rem;
}
.callout .mk { color: var(--brand-2); flex: none; font-weight: 700; }
.callout p { margin: 0; color: var(--fg); }

/* ---------- cta band ---------- */
.cta-band {
  text-align: center;
  background:
    radial-gradient(120% 140% at 50% -20%, rgba(56, 113, 235, 0.28), transparent 60%),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 56px 24px;
}
.cta-band h2 { margin-bottom: 10px; }
.cta-band .hero-cta { justify-content: center; }

/* ---------- docs layout ---------- */
.doc-wrap { display: grid; grid-template-columns: 220px 1fr; gap: 48px; align-items: start; padding: 48px 0 80px; }
.doc-nav { position: sticky; top: 88px; font-size: 0.92rem; }
.doc-nav strong { display: block; color: var(--faint); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.72rem; margin: 0 0 10px; }
.doc-nav a { display: block; color: var(--muted); padding: 6px 10px; border-radius: 7px; }
.doc-nav a:hover { color: var(--fg); background: var(--surface-2); text-decoration: none; }
.doc-content { max-width: 760px; }
.doc-content h2 { margin-top: 8px; scroll-margin-top: 84px; }
.doc-content h3 { margin-top: 34px; scroll-margin-top: 84px; }
.doc-content ul, .doc-content ol { color: var(--muted); padding-left: 22px; }
.doc-content li { margin-bottom: 8px; }
.doc-content pre.code { margin: 16px 0; }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0 40px;
  margin-top: 40px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.footer-grid img { height: 24px; margin-bottom: 14px; }
.footer-grid p { font-size: 0.9rem; max-width: 34ch; }
.footer-col h4 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--faint); margin: 0 0 12px; }
.footer-col a { display: block; color: var(--muted); font-size: 0.92rem; padding: 4px 0; }
.footer-col a:hover { color: var(--fg); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 0.86rem;
}

/* ---------- utilities ---------- */
.center { text-align: center; margin-left: auto; margin-right: auto; }
.mono { font-family: var(--mono); }
.hide-mobile { }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-art { order: -1; }
  .hero-art img { width: 180px; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .doc-wrap { grid-template-columns: 1fr; }
  .doc-nav { position: static; display: none; }
}
@media (max-width: 640px) {
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 16px 18px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px; border-radius: 9px; }
  .nav-toggle { display: inline-grid; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 40px; }
}