:root {
  color-scheme: light dark;
  --bg: #faf8f3;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #1f4e5f;
  --accent-soft: #c4a35a;
  --card: #fff;
  --border: #e4dfd4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #ececec;
    --muted: #b0b0b0;
    --accent: #8ec5d6;
    --accent-soft: #d4b96a;
    --card: #1c1c1c;
    --border: #333;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}
a { color: var(--accent); }
.site-header {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: 0 1px 4px color-mix(in srgb, var(--text) 12%, transparent);
}
.brand-name {
  font-weight: 800;
  font-size: 1.1rem;
}
.brand-tag {
  color: var(--muted);
  font-size: 0.85rem;
}
.site-nav a {
  margin-left: 16px;
  text-decoration: none;
  font-size: 0.95rem;
}
.site-nav a:hover { text-decoration: underline; }
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}
.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-bottom: 40px;
}
@media (min-width: 720px) {
  .hero {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.2;
  margin: 0 0 8px;
  color: var(--accent);
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text);
  margin: 0 0 16px;
  font-weight: 600;
}
.app-identity {
  margin-bottom: 28px;
}
.app-identity h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  color: var(--accent);
}
.app-identity ul {
  margin: 0;
  padding-left: 1.25rem;
}
.app-identity li {
  margin-bottom: 6px;
}
.hero-lead {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 0 0 20px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-secondary {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--card);
}
.hero-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
.hero-card h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--accent-soft);
}
.hero-card ul {
  margin: 0;
  padding-left: 1.1rem;
}
.hero-card li { margin-bottom: 6px; }
.section-title {
  font-size: 1.25rem;
  margin: 0 0 16px;
  color: var(--accent);
}
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 40px;
}
@media (min-width: 600px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
}
.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 18px 16px;
}
.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}
.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.note {
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-left: 4px solid var(--accent);
  padding: 14px 16px;
  margin: 24px 0;
  font-size: 0.95rem;
  border-radius: 0 8px 8px 0;
}
.site-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.88rem;
}
.site-footer a { margin-right: 16px; }
/* privacy page */
.legal main { max-width: 720px; }
.legal h1 {
  font-size: 1.75rem;
  margin: 0 0 8px;
  color: var(--accent);
}
.legal .meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 28px;
}
.legal h2 {
  font-size: 1.15rem;
  margin: 28px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.legal p, .legal li { margin: 0 0 10px; }
.legal ul { padding-left: 1.25rem; }

/* changelog */
.release {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px 12px;
  margin: 0 0 18px;
}
.release-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.release h2 {
  margin: 0;
  padding: 0;
  border: none;
  font-size: 1.2rem;
  color: var(--accent);
}
.release-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.release ul {
  margin: 0;
  padding-left: 1.25rem;
}
.release li {
  margin: 0 0 8px;
  color: var(--text);
}