/* Sleep Tiles site. Tokens mirror the app's Dusk theme (design/DESIGN.md). */
:root {
  --bg: #F5F4FB;
  --surface: #FFFFFF;
  --surface-raised: #ECEBF6;
  --hairline: rgba(20, 21, 43, 0.10);
  --text: #14152B;
  --text-2: #4C4E6E;
  --text-3: #6B6D8C;
  --accent: #4B57D8;
  --on-accent: #FFFFFF;
  --l0: #E3E4F0;
  --l1: #CC4B48;
  --l2: #DDB65C;
  --l3: #30A14E;
  --l4: #216E39;
  --radius-card: 20px;
  --radius-control: 14px;
  --page: 720px;
  --page-wide: 1160px;
  --display: "Bricolage Grotesque", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --rounded: ui-rounded, "SF Pro Rounded", -apple-system, system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0B0D1A;
    --surface: #141730;
    --surface-raised: #1D2142;
    --hairline: rgba(255, 255, 255, 0.09);
    --text: #F3F2FF;
    --text-2: #A9ABCB;
    --text-3: #8487AD;
    --accent: #9AA6FF;
    --on-accent: #0B0D1A;
    --l0: #222647;
    --l1: #C4504A;
    --l2: #B9923B;
    --l3: #2EA043;
    --l4: #56D364;
  }
}

:root[data-theme="dark"] {
  --bg: #0B0D1A;
  --surface: #141730;
  --surface-raised: #1D2142;
  --hairline: rgba(255, 255, 255, 0.09);
  --text: #F3F2FF;
  --text-2: #A9ABCB;
  --text-3: #8487AD;
  --accent: #9AA6FF;
  --on-accent: #0B0D1A;
  --l0: #222647;
  --l1: #C4504A;
  --l2: #B9923B;
  --l3: #2EA043;
  --l4: #56D364;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-underline-offset: 2px; }

.wrap { max-width: var(--page); margin: 0 auto; padding: 0 16px; }
.wrap-wide { max-width: var(--page-wide); }

h1, h2, h3 { font-family: var(--display); font-optical-sizing: auto; }

.skip { position: absolute; left: 16px; top: -48px; z-index: 100; padding: 10px 14px; border-radius: 10px; background: var(--accent); color: var(--on-accent); font-weight: 600; text-decoration: none; }
.skip:focus { top: 12px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* Header: a floating glass pill that stays on screen */
.site-header { position: sticky; top: 0; z-index: 50; padding: 12px 12px 0; }
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 8px 8px 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  backdrop-filter: blur(18px) saturate(1.6);
  box-shadow: inset 0 0 0 1px var(--hairline), 0 12px 32px -18px rgba(0, 0, 0, 0.55);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-family: var(--display); font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav { display: flex; align-items: center; gap: 4px; font-size: 15px; }
.nav a { color: var(--text-2); text-decoration: none; padding: 8px 12px; border-radius: 999px; transition: color 0.15s ease, background 0.15s ease; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); background: var(--surface-raised); }
.nav .nav-cta { margin-left: 6px; padding: 9px 16px; background: var(--accent); color: var(--on-accent); font-weight: 600; }
.nav .nav-cta:hover { color: var(--on-accent); background: var(--accent); filter: brightness(1.08); }
.site-footer .brand { font-size: 18px; }

/* Sections */
section { padding: 28px 0; }
h2 { font-size: 26px; letter-spacing: -0.01em; margin: 0 0 14px; }
h3 { font-size: 18px; margin: 0 0 6px; }


/* Long-form pages */
.doc { padding: 24px 0 40px; }
.doc h1 { font-size: clamp(30px, 6vw, 40px); letter-spacing: -0.02em; margin: 0 0 6px; }
.doc .meta { color: var(--text-3); font-size: 14px; margin: 0 0 28px; }
.doc h2 { font-size: 21px; margin: 32px 0 10px; }
.doc p, .doc li { color: var(--text-2); }
.doc strong { color: var(--text); }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.callout {
  background: var(--surface-raised);
  border-radius: var(--radius-card);
  padding: 16px 18px;
  margin: 20px 0;
}
.callout p { margin: 0; color: var(--text); }

details { background: var(--surface); border: 1px solid var(--hairline); border-radius: 16px; padding: 14px 18px; margin: 10px 0; }
details summary { cursor: pointer; font-weight: 600; color: var(--text); }
details p, details ol, details ul { margin: 10px 0 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--hairline); padding: 24px 0 40px; color: var(--text-3); font-size: 14px; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.site-footer a { color: var(--text-2); text-decoration: none; margin-right: 16px; }
.site-footer a:last-child { margin-right: 0; }
.footer-guides { flex-basis: 100%; padding-bottom: 20px; margin-bottom: 8px; border-bottom: 1px solid var(--hairline); }
.footer-title { margin: 0 0 10px; font-family: var(--display); font-size: 16px; font-weight: 700; }
.footer-title a { color: var(--text); }
.footer-guides ul { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 8px 24px; }
.site-footer .footer-guides a:hover, .site-footer span a:hover { color: var(--text); }

@media (max-width: 760px) {
  .landing .nav a:not(.nav-cta):not([href="/guides/"]) { display: none; }
}
@media (max-width: 480px) {
  .nav { gap: 2px; font-size: 14px; }
  .nav a { padding: 8px 9px; }
  .brand { font-size: 17px; }
}

/* Floating QR card for desktop visitors (qr-dock.js) */
.qr-dock {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 300px;
  padding: 12px 40px 12px 12px;
  border-radius: 20px;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  backdrop-filter: blur(18px) saturate(1.6);
  box-shadow: inset 0 0 0 1px var(--hairline), 0 18px 40px -20px rgba(0, 0, 0, 0.7);
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.qr-dock.show { opacity: 1; transform: none; pointer-events: auto; }
.qr-dock img { display: block; flex: none; box-sizing: content-box; padding: 7px; background: #fff; border-radius: 12px; }
.qr-dock strong { display: block; font-family: var(--display); font-size: 16px; color: var(--text); }
.qr-dock p { margin: 3px 0 0; font-size: 13px; line-height: 1.35; color: var(--text-2); }
.qr-dock button {
  position: absolute;
  top: 8px;
  right: 8px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
}
.qr-dock button:hover { background: var(--surface-raised); color: var(--text); }
.qr-dock button svg { width: 12px; height: 12px; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; fill: none; }
@media (prefers-reduced-motion: reduce) {
  .qr-dock { transition: none; transform: none; }
}