/* cairn.storage: one page, no scripts. The palette is the Cairn web interface's (crates/server/web/app.css). */
:root {
  --bg: #f6f6f4; --panel: #ffffff; --text: #1f2328; --muted: #646b73; --line: #e2e2de;
  --accent: #2e6b5b; --accent-text: #ffffff; --code-bg: #1d1e20; --code-text: #e5e5e2; --code-c: #9a9fa6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151617; --panel: #1d1e20; --text: #e5e5e2; --muted: #9a9fa6; --line: #2d2f32;
    --accent: #62b59c; --accent-text: #0c1512; --code-bg: #0f1011;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

.top { border-bottom: 1px solid var(--line); background: var(--panel); }
.top-in { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 650; font-size: 20px; }
.top nav { display: flex; gap: 20px; }
.top nav a { color: var(--text); text-decoration: none; font-size: 15px; }
.top nav a:hover { color: var(--accent); }

section { padding: 56px 0; }
section.alt { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h1 { font-size: clamp(32px, 6vw, 52px); line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 20px; max-width: 18ch; }
h2 { font-size: 28px; line-height: 1.25; margin: 0 0 20px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 0 0 8px; }
p { margin: 0 0 16px; }

.hero { padding: 72px 0 56px; }
.lead { font-size: 20px; max-width: 46em; color: var(--text); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--panel); color: var(--text); text-decoration: none; font-weight: 600; font-size: 16px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.status {
  max-width: 46em; font-size: 15px; color: var(--muted);
  border-left: 3px solid var(--accent); padding: 4px 0 4px 14px;
}
.status strong { color: var(--text); }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin: 0 0 20px; }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
section.alt .card { background: var(--bg); }
.card p { margin: 0; font-size: 16px; color: var(--muted); }
.more { font-size: 16px; }

.promises { padding-left: 1.4em; max-width: 46em; margin: 0; }
.promises li { margin: 0 0 8px; padding-left: 4px; }

pre {
  background: var(--code-bg); color: var(--code-text); border-radius: 10px; padding: 18px 20px;
  overflow-x: auto; font-size: 14px; line-height: 1.55; margin: 0 0 20px;
}
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; font-size: 0.9em; }
pre code { font-size: inherit; }
p code, .card code { background: var(--line); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere; }
pre .c { color: var(--code-c); }

.why { color: var(--muted); font-style: italic; }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 15px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; }
footer span { font-weight: 600; color: var(--text); }

@media (max-width: 520px) {
  body { font-size: 16px; }
  .lead { font-size: 18px; }
  section { padding: 40px 0; }
  .hero { padding: 44px 0 36px; }
  .top nav { gap: 14px; }
  .btn { width: 100%; text-align: center; }
}