:root {
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --text: #1a1b26;
  --text-muted: #565a6e;
  --border: #e4e6ef;
  --accent-1: #6c5ce7;
  --accent-2: #38bdf8;
  --card-bg: #ffffff;
  --card-shadow: 0 8px 30px rgba(30, 30, 60, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12121c;
    --bg-alt: #191926;
    --text: #f1f1f7;
    --text-muted: #a5a8bd;
    --border: #2a2b3d;
    --card-bg: #191926;
    --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

a { color: var(--accent-1); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

header.site {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}

.brand .mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  display: inline-block;
}

nav.site a {
  color: var(--text-muted);
  margin-left: 22px;
  font-size: 0.95rem;
}
nav.site a:hover { color: var(--text); }

.hero {
  padding: 72px 0 48px;
  text-align: center;
}

.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 28px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: white;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn:hover { text-decoration: none; opacity: 0.92; }

.btn.secondary {
  background: var(--bg-alt);
  color: var(--text);
  border: 1px solid var(--border);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--card-shadow);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.app-icon-preview {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  margin: 0 auto 20px;
  display: block;
  box-shadow: var(--card-shadow);
}

section.page {
  padding: 48px 0 64px;
}

section.page h1 {
  font-size: 2rem;
  margin-bottom: 6px;
}

.updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
}

.doc-section {
  margin-bottom: 26px;
}

.doc-section h2 {
  font-size: 1.1rem;
  margin: 0 0 6px;
}

.doc-section p {
  color: var(--text-muted);
  margin: 0;
}

.disclaimer {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

footer.site {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

footer.site .wrap {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.screens {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 8px 0 20px;
}
.screens img {
  height: 340px;
  border-radius: 20px;
  box-shadow: var(--card-shadow);
  flex-shrink: 0;
}

.faq dt {
  font-weight: 600;
  margin-top: 18px;
}
.faq dd {
  margin: 6px 0 0;
  color: var(--text-muted);
}