/* System Sync public site: the front door at /, the Card Contacts pages under /cards.
 *
 * Tokens mirror the VW tool's own palette (web/src/index.css) so the landing and the
 * app it links to read as one product: purple accent, system sans, light and dark
 * driven by the visitor's OS. Nothing here is loaded by the React app; these pages
 * are plain HTML served straight from web/public. */

:root {
  --bg: #ffffff;
  --bg-soft: #faf9fb;
  --panel: #ffffff;
  --text: #6b6375;
  --text-h: #08060d;
  --border: #e5e4e7;
  --accent: #aa3bff;
  --accent-bg: rgba(170, 59, 255, 0.1);
  --accent-border: rgba(170, 59, 255, 0.5);
  --accent-ink: #ffffff;
  --shadow: 0 1px 2px rgba(8, 6, 13, 0.04), 0 12px 32px -16px rgba(8, 6, 13, 0.18);
  --sans: system-ui, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, Consolas, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171d;
    --bg-soft: #101116;
    --panel: #1b1c23;
    --text: #9ca3af;
    --text-h: #f3f4f6;
    --border: #2e303a;
    --accent: #c084fc;
    --accent-bg: rgba(192, 132, 252, 0.15);
    --accent-border: rgba(192, 132, 252, 0.5);
    --accent-ink: #1b0b2b;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 40px -20px rgba(0, 0, 0, 0.8);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
img { max-width: 100%; }
.mono { font-family: var(--mono); font-size: 0.94em; }

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding-inline: 20px;
}

/* Header ------------------------------------------------------------------ */

.site-head {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.site-head .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-block: 14px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-h);
  font-weight: 650;
  letter-spacing: -0.2px;
}

.brand img { width: 30px; height: 30px; }

.site-head nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
  font-size: 14px;
}

.site-head nav a {
  color: var(--text);
  text-decoration: none;
}

.site-head nav a:hover { color: var(--accent); }

/* Hero -------------------------------------------------------------------- */

.hero {
  padding-block: 72px 56px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--text-h);
  font-weight: 700;
}

.hero p {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(16px, 2.2vw, 18px);
}

.hero .logo-lockup {
  width: 170px;
  margin-bottom: 24px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}

/* App grid ---------------------------------------------------------------- */

section { padding-block: 56px; }

section > .wrap > h2 {
  margin: 0 0 6px;
  font-size: 22px;
  color: var(--text-h);
  letter-spacing: -0.4px;
}

.section-note {
  margin: 0 0 28px;
  max-width: 60ch;
}

.apps {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* Four cards read badly as three plus an orphan, so a set of four pairs up. */
.apps.pair { grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }

.app-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.app-card h3 {
  margin: 0;
  font-size: 18px;
  color: var(--text-h);
  letter-spacing: -0.3px;
}

.app-card p { margin: 0; font-size: 15px; }

.app-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: 14.5px;
}

.app-card li { margin-bottom: 4px; }

.app-card .spacer { flex: 1; }

.tag {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--accent-border);
  background: var(--accent-bg);
  color: var(--accent);
}

.tag.quiet {
  border-color: var(--border);
  background: transparent;
  color: var(--text);
}

/* Buttons ----------------------------------------------------------------- */

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 11px 20px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  border: 1px solid var(--accent);
  text-align: center;
}

.btn:hover { filter: brightness(1.06); }

.btn.ghost {
  background: transparent;
  color: var(--accent);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* Feature rows ------------------------------------------------------------ */

.features {
  display: grid;
  gap: 28px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.feature h3 {
  margin: 0 0 6px;
  font-size: 16px;
  color: var(--text-h);
}

.feature p { margin: 0; font-size: 15px; }

.feature .num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}

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

.doc { padding-block: 48px 72px; }

.doc h1 {
  margin: 0 0 8px;
  font-size: clamp(26px, 4vw, 34px);
  letter-spacing: -0.7px;
  color: var(--text-h);
}

.doc .updated {
  font-family: var(--mono);
  font-size: 12.5px;
  margin: 0 0 36px;
}

.doc h2 {
  margin: 40px 0 10px;
  font-size: 19px;
  color: var(--text-h);
  letter-spacing: -0.3px;
}

.doc h3 {
  margin: 26px 0 6px;
  font-size: 16px;
  color: var(--text-h);
}

.doc p, .doc li { max-width: 74ch; }
.doc ul { padding-left: 20px; }
.doc li { margin-bottom: 6px; }

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 15px;
}

.doc th, .doc td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px;
  border: 1px solid var(--border);
}

.doc th {
  background: var(--bg-soft);
  color: var(--text-h);
  font-weight: 600;
}

.table-scroll { overflow-x: auto; }

.callout {
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid var(--accent-border);
  background: var(--accent-bg);
  border-radius: 12px;
  font-size: 15px;
}

.callout p { margin: 0; }

/* Footer ------------------------------------------------------------------ */

.site-foot {
  border-top: 1px solid var(--border);
  padding-block: 28px 40px;
  font-size: 14px;
}

.site-foot .wrap {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.site-foot nav {
  margin-left: auto;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-foot a { color: var(--text); text-decoration: none; }
.site-foot a:hover { color: var(--accent); }