/* Shared styling for standalone pages (privacy, terms, support). */
:root {
  --bg: #f5f5f7;
  --bg-grad: radial-gradient(1200px 600px at 50% -10%, #e9edff 0%, transparent 60%);
  --card: rgba(255, 255, 255, 0.72);
  --card-border: rgba(0, 0, 0, 0.06);
  --card-hover-border: rgba(0, 0, 0, 0.1);
  --text: #1d1d1f;
  --muted: #6e6e73;
  --accent: #0071e3;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.06), 0 20px 48px rgba(0, 0, 0, 0.12);
  --control-bg: rgba(120, 120, 128, 0.12);
  --control-thumb: #ffffff;
}
:root[data-theme="dark"] {
  --bg: #000000;
  --bg-grad: radial-gradient(1200px 600px at 50% -10%, #14162b 0%, transparent 60%);
  --card: rgba(28, 28, 30, 0.66);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-hover-border: rgba(255, 255, 255, 0.16);
  --text: #f5f5f7;
  --muted: #98989d;
  --accent: #2997ff;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.5), 0 20px 48px rgba(0, 0, 0, 0.6);
  --control-bg: rgba(120, 120, 128, 0.32);
  --control-thumb: #636366;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #000000;
    --bg-grad: radial-gradient(1200px 600px at 50% -10%, #14162b 0%, transparent 60%);
    --card: rgba(28, 28, 30, 0.66);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-hover-border: rgba(255, 255, 255, 0.16);
    --text: #f5f5f7;
    --muted: #98989d;
    --accent: #2997ff;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.5), 0 20px 48px rgba(0, 0, 0, 0.6);
    --control-bg: rgba(120, 120, 128, 0.32);
    --control-thumb: #636366;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  background-image: var(--bg-grad);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}
.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}
.back:hover { text-decoration: underline; }

/* Theme toggle — segmented control */
.theme-toggle {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--control-bg);
  border-radius: 980px;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}
.theme-toggle button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 30px;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 980px;
  cursor: pointer;
  padding: 0;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.theme-toggle button:hover { color: var(--text); }
.theme-toggle button[aria-pressed="true"] {
  background: var(--control-thumb);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.14);
}
.theme-toggle svg { width: 16px; height: 16px; }

.prose h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}
.prose .updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0 0 32px;
}
.prose h2 {
  font-size: 1.28rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 40px 0 10px;
}
.prose h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 24px 0 8px;
}
.prose p, .prose li { color: var(--text); }
.prose .lead { font-size: 1.06rem; color: var(--muted); }
.prose a { color: var(--accent); text-decoration: none; }
.prose a:hover { text-decoration: underline; }
.prose ul { padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose strong { font-weight: 650; }

.callout {
  background: var(--card);
  border: 0.5px solid var(--card-border);
  border-radius: 16px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  margin: 20px 0;
}
.callout p:first-child { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

.footer {
  margin-top: 64px;
  padding-top: 26px;
  border-top: 0.5px solid var(--card-border);
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--muted);
}
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--text); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}