/* ──────────────────────────────────────────────────────────────────────────
   shared.css — common chrome for the Zentsu marketing site
   Used by: index.html, privacy.html, terms.html, bench/support.html, bench.html
   bench.html overrides most of this with /bench.css (different design system),
   but the box-sizing reset is genuinely shared with everyone.
   ────────────────────────────────────────────────────────────────────────── */

/* ── Reset (shared by all 5 pages) ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Variables (light) ── */
:root {
  --bg: #f9f9f7;
  --surface: #ffffff;
  --border: #e5e5e3;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #4a7c6f;
  --accent-light: #eaf2f0;
  --body-text: #333333;
}

/* ── Base ── */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Nav (matches bench.html: sticky w/ backdrop blur) ── */
nav {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
}
nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  max-width: 1160px;
  margin: 0 auto;
  height: 60px;
}
nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.875rem;
  letter-spacing: 0.01em;
  transition: color 0.15s;
}
nav a:hover,
nav a.active {
  color: var(--text);
}
nav li:first-child {
  margin-right: auto;
}
nav li:first-child a {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

/* ── Legal/support article styles (shared by privacy, terms, support) ── */
article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem 3rem;
  max-width: 760px;
  margin: 0 auto;
}
@media (max-width: 600px) {
  article {
    padding: 1.75rem 1.25rem;
  }
}

.page-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 0.25rem 0.65rem;
  border-radius: 5px;
  margin-bottom: 1rem;
}

article h1 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}
article .effective {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 2.25rem;
}
article h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.6rem;
  color: var(--text);
}
article p,
article ul,
article ol {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--body-text);
}
article ul,
article ol {
  padding-left: 1.4rem;
}
article li {
  margin-bottom: 0.35rem;
}
article a {
  color: var(--accent);
  text-decoration: none;
}
article a:hover {
  text-decoration: underline;
}
article hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ── Footer (shared by index, privacy, terms, support) ── */
footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8125rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
footer a {
  color: var(--muted);
  text-decoration: none;
}
footer a:hover {
  color: var(--accent);
}

/* ── Dark mode ── */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --surface: #1c1c1e;
    --border: #2c2c2e;
    --text: #f0f0f0;
    --muted: #8e8e93;
    --accent: #5fa896;
    --accent-light: #1e3330;
    --body-text: #d1d1d6;
  }
}

/* Feature flags — see /flags.js. Hidden by default; revealed when corresponding flag is live.
   !important is intentional: feature gates must beat any later layout rule (e.g. .btn { display: inline-flex }). */
.feature-app-store {
  display: none !important;
}
.flag-appStoreLive .feature-app-store {
  display: revert !important;
}