/* Auto Cal site — self-contained, no external deps. Light + dark via prefers-color-scheme. */

:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --surface: #ffffff;
  --border: #e3e8ef;
  --text: #17202a;
  --text-muted: #56616e;
  --accent: #2563eb;
  --accent-2: #0d9488;
  --accent-contrast: #ffffff;
  --code-bg: #0f1117;
  --code-text: #e6e9ef;
  --code-cmt: #7f8ea3;
  --radius: 12px;
  --wrap: 1080px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, 'SF Mono', 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0e13;
    --bg-alt: #11151c;
    --surface: #141922;
    --border: #232c39;
    --text: #e7eaee;
    --text-muted: #97a2b1;
    --accent: #60a5fa;
    --accent-2: #2dd4bf;
    --accent-contrast: #0b0e13;
    --code-bg: #05070b;
    --code-text: #e6e9ef;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

code { font-family: var(--mono); font-size: 0.92em; }

p code, li code, td code, h3 code {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.08em 0.38em;
  font-size: 0.85em;
  white-space: nowrap;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { font-size: 20px; }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--text-muted); font-weight: 500; font-size: 15px; }
.site-nav a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero {
  position: relative;
  padding: 84px 0 64px;
  background:
    radial-gradient(1000px 400px at 15% -10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent),
    radial-gradient(900px 380px at 100% 0%, color-mix(in srgb, var(--accent-2) 18%, transparent), transparent);
  border-bottom: 1px solid var(--border);
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.08;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
  max-width: 16ch;
}
.lede { font-size: clamp(1.05rem, 2.2vw, 1.25rem); color: var(--text-muted); max-width: 62ch; margin: 0 0 28px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 9px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.06s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); }

/* Hero schedule card — a mini rendered day */
.schedule-card {
  margin-top: 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  max-width: 560px;
  box-shadow: 0 12px 40px -18px rgba(0, 0, 0, 0.35);
}
.schedule-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px 12px;
  border-bottom: 1px solid var(--border);
}
.schedule-head strong { font-size: 0.95rem; }
.schedule-head span { color: var(--text-muted); font-size: 0.82rem; }
.slot { display: flex; align-items: center; gap: 14px; padding: 11px 14px; }
.slot + .slot { border-top: 1px solid var(--border); }
.slot-time { font-family: var(--mono); font-size: 12px; color: var(--text-muted); min-width: 48px; }
.slot-bar { width: 4px; align-self: stretch; border-radius: 999px; background: var(--accent); }
.slot-bar.b2 { background: var(--accent-2); }
.slot-bar.b3 { background: #f59e0b; }
.slot-bar.b4 { background: #a855f7; }
.slot-body { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.slot-title { font-size: 0.92rem; font-weight: 600; }
.slot-meta { color: var(--text-muted); font-size: 0.78rem; }
.slot-tag {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--accent);
}
.slot-tag.habit { background: color-mix(in srgb, var(--accent-2) 20%, transparent); color: var(--accent-2); }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section h2 { font-size: clamp(1.6rem, 3.5vw, 2.1rem); letter-spacing: -0.02em; margin: 0 0 32px; }
.section h3 { font-size: 1.15rem; margin: 32px 0 12px; }
.section-lede { color: var(--text-muted); max-width: 68ch; margin: -18px 0 34px; font-size: 1.05rem; }

/* Feature grid */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}
.feature-icon { font-size: 26px; margin-bottom: 12px; }
.feature h3 { margin: 0 0 8px; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

/* Flow diagram */
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 14px; }
.flow-node {
  flex: 1 1 200px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.flow-node strong { font-size: 1rem; }
.flow-node span { color: var(--text-muted); font-size: 0.88rem; }
.flow-scheduler { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.flow-arrow { display: flex; align-items: center; color: var(--text-muted); font-weight: 600; }
.flow-caption { margin-top: 22px; color: var(--text-muted); max-width: 72ch; }

/* Code blocks */
pre.code {
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: 10px;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.88rem;
  line-height: 1.65;
  border: 1px solid color-mix(in srgb, var(--code-text) 12%, transparent);
}
pre.code code { background: none; border: none; padding: 0; white-space: pre; color: inherit; }
.cmt { color: var(--code-cmt); }

.pill {
  font-size: 0.72rem;
  font-weight: 600;
  vertical-align: middle;
  color: var(--text-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
}

/* Final CTA */
.cta-final { text-align: center; }
.cta-final .cta-row { justify-content: center; }
.cta-final p { color: var(--text-muted); margin: 0 0 24px; }

/* Docs / self-hosting */
.wrap-docs { max-width: 1120px; }
.docs-layout { display: grid; grid-template-columns: 220px 1fr; gap: 48px; align-items: start; }
.toc { position: sticky; top: 84px; font-size: 0.9rem; }
.toc-title { text-transform: uppercase; letter-spacing: 0.08em; font-size: 11px; color: var(--text-muted); font-weight: 700; margin: 0 0 10px; }
.toc nav { display: flex; flex-direction: column; gap: 8px; }
.toc nav a { color: var(--text-muted); }
.toc nav a:hover { color: var(--accent); text-decoration: none; }
.toc-foot { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.docs-body { min-width: 0; }
.docs-body h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); margin: 0 0 12px; letter-spacing: -0.02em; }
.docs-body h2 { font-size: 1.5rem; margin: 48px 0 14px; padding-top: 8px; letter-spacing: -0.01em; }
.docs-body h3 { font-size: 1.12rem; margin: 28px 0 10px; }
.docs-body .lede { font-size: 1.1rem; }
.docs-body p, .docs-body li { color: var(--text-muted); }
.docs-body strong { color: var(--text); }

.table-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); }
th { background: var(--bg-alt); font-weight: 600; color: var(--text); }
tr:last-child td { border-bottom: none; }
td code { white-space: nowrap; }

.notes { padding-left: 20px; }
.notes li { margin-bottom: 10px; }
.docs-cta { margin-top: 36px; }

.callout {
  margin: 18px 0;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  background: var(--bg-alt);
}
.callout p { margin: 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-alt); padding: 32px 0; margin-top: 0; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; align-items: center; }
.site-footer p { margin: 0; color: var(--text-muted); font-size: 0.88rem; }
.footer-links { display: flex; gap: 18px; }

@media (max-width: 780px) {
  .docs-layout { grid-template-columns: 1fr; gap: 24px; }
  .toc { position: static; }
  .flow-arrow { transform: rotate(90deg); }
}