/* Hair Compass AI — shared site shell.
   Tokens are lifted verbatim from the app's design system (Design/Clinical.swift):
   warm ivory canvas with a vertical light wash and paper grain, espresso ink,
   copper accent, serif display, monospaced eyebrows, hairline rules. */

:root {
  --canvas: #fbf6ef;
  --canvas-light: #fdf9f3;
  --canvas-warm: #f8f2e9;
  --surface: #fefcf9;
  --ink: #2b211a;
  --secondary: #7a6b5d;
  --tertiary: #7c6d5f;
  --hairline: #ede1d3;
  --copper: #b1592e;
  --copper-soft: rgba(177, 89, 46, 0.1);
  --gold: #c9a15a;
  --sage: #8a9d7b;
  --positive: #5c7a52;
  --shadow-warm: rgba(90, 56, 27, 0.1);

  --serif: "Iowan Old Style", "New York", ui-serif, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --col: 680px;
  --wide: 900px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  /* The app's canvas wash: light falls at the top, the page rests warmer below. */
  background: linear-gradient(to bottom, var(--canvas-light) 0%, var(--canvas) 45%, var(--canvas-warm) 100%) var(--canvas);
  -webkit-font-smoothing: antialiased;
}

/* Paper grain, tiled over everything — the canvas should never read as a flat
   digital fill. Espresso-tinted noise, barely there. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.353 0 0 0 0 0.275 0 0 0 0 0.216 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23g)'/%3E%3C/svg%3E");
}

main, footer, header { position: relative; z-index: 1; }

/* ---- Type roles ---- */

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--secondary);
  margin: 0 0 14px;
}

h1, h2 {
  font-family: var(--serif);
  color: var(--ink);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  font-weight: 700;
}

h1 { font-size: clamp(2.1rem, 5.4vw, 3.3rem); }
h2 { font-size: clamp(1.45rem, 3vw, 1.9rem); }

p, li { color: var(--secondary); }
p { margin: 0 0 16px; }

strong { color: var(--ink); font-weight: 600; }

a { color: var(--copper); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---- Layout ---- */

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

section { padding: 64px 0 8px; }

/* The strand seam — the app's StrandDivider, doing the work borders would
   otherwise do. */
.seam {
  display: block;
  width: min(420px, 62vw);
  margin: 56px auto 0;
  opacity: 0.75;
}

/* Hairline rule, for quieter seams inside a section. */
.rule {
  border: 0;
  border-top: 1px solid var(--hairline);
  margin: 40px 0;
}

/* ---- Components quoted from the app ---- */

/* Today's signal ledger: mono label, ink value, one quiet note. */
.ledger { margin: 8px 0 0; }
.ledger-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 4px 24px;
  align-items: baseline;
  padding: 15px 0;
  border-top: 1px solid var(--hairline);
}
.ledger-row:last-child { border-bottom: 1px solid var(--hairline); }
.ledger-key {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--tertiary);
}
.ledger-value { color: var(--ink); font-weight: 500; }
.ledger-note {
  grid-column: 2;
  font-size: 0.9rem;
  color: var(--secondary);
  margin: 0;
}

/* Evidence-tier pills — the app's honesty made visible. */
.tier-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 10px; }
.tier {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.09em;
  padding: 5px 10px;
  border-radius: 999px;
}
.tier-strong { color: var(--ink); background: rgba(43, 33, 26, 0.09); }
.tier-moderate { color: #9a7728; background: rgba(201, 161, 90, 0.16); }
.tier-weak { color: var(--tertiary); background: rgba(124, 109, 95, 0.12); }

/* InfoCallout — the bordered "read this first" card. */
.callout {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid rgba(177, 89, 46, 0.25);
  border-radius: 16px;
  padding: 16px 18px;
  margin: 26px 0;
}
.callout-mark {
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--copper-soft);
  color: var(--copper);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15px;
  font-style: italic;
  display: grid;
  place-items: center;
}
.callout p { margin: 2px 0 0; font-size: 0.92rem; }

/* Screenshot plates, framed the way BrandBanner frames imagery:
   continuous corners, hairline stroke, layered warm shadow. */
.plates {
  display: flex;
  justify-content: center;
  gap: 34px;
  flex-wrap: wrap;
  margin-top: 52px;
}
.plate { width: min(300px, 78vw); }
.plate img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 26px;
  border: 1px solid var(--hairline);
  box-shadow: 0 1px 2px var(--shadow-warm), 0 18px 44px rgba(90, 56, 27, 0.14);
}
.plate figcaption {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--tertiary);
  text-align: center;
  margin-top: 14px;
}
figure { margin: 0; }

/* ---- Footer: meadow closer + colophon ---- */

.colophon {
  border-top: 1px solid var(--hairline);
  padding: 22px 0 0;
  text-align: center;
}
.colophon p { font-size: 0.86rem; color: var(--secondary); margin: 0 0 10px; }
.foot-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 26px;
  font-size: 0.86rem;
  padding: 4px 0 0;
}
.foot-fine {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tertiary);
  text-align: center;
  margin: 26px 0 0;
}
.meadow {
  display: block;
  width: min(1000px, 100%);
  margin: 12px auto 0;
}
footer { padding-top: 56px; }

/* ---- Document pages (support, privacy) ---- */

.doc-header { padding: 72px 0 6px; }
.doc-nav {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding-top: 28px;
}
.doc-nav a { color: var(--tertiary); }
.doc-nav a:hover { color: var(--copper); }
.doc h2 {
  font-size: 1.3rem;
  margin: 44px 0 10px;
  padding-top: 30px;
  border-top: 1px solid var(--hairline);
}
.doc h2:first-of-type { border-top: 0; padding-top: 8px; }
.doc ul { margin: 0 0 16px; padding-left: 20px; }
.doc li { margin: 4px 0; }

/* ---- Motion: the app's staggered entrance, once, on load ---- */

.rise { animation: rise 0.6s cubic-bezier(0.22, 0.9, 0.35, 1) both; }
.rise-1 { animation-delay: 0.05s; }
.rise-2 { animation-delay: 0.1s; }
.rise-3 { animation-delay: 0.15s; }
.rise-4 { animation-delay: 0.22s; }
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .rise { animation: fade 0.3s ease-out both; }
  @keyframes fade { from { opacity: 0; } to { opacity: 1; } }
}

/* ---- Small screens ---- */

@media (max-width: 560px) {
  section { padding-top: 52px; }
  .ledger-row { grid-template-columns: 1fr; gap: 2px; }
  .ledger-note { grid-column: 1; }
  .plates { gap: 26px; }
}