:root {
  --bg: #ffffff;
  --bg-alt: #f5f6f8;
  --text: #16181d;
  --text-muted: #5b6270;
  --border: #e4e6eb;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --card-bg: #ffffff;
  --code-bg: #f0f1f4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --bg-alt: #16191f;
    --text: #eef0f3;
    --text-muted: #9aa1ac;
    --border: #262a33;
    --accent: #5b8def;
    --accent-hover: #7ba3f5;
    --card-bg: #181b21;
    --code-bg: #1e222a;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

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

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

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header.site {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

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

.brand .mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 800;
}

nav.site-nav {
  display: flex;
  gap: 28px;
}

nav.site-nav a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

nav.site-nav a.active,
nav.site-nav a:hover {
  color: var(--text);
}

/* Hero */
.hero {
  padding: 72px 0 56px;
  text-align: center;
}

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

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto;
}

/* App grid */
.section {
  padding: 40px 0;
}

.section-title {
  font-size: 1.5rem;
  margin: 0 0 8px;
}

.section-sub {
  color: var(--text-muted);
  margin: 0 0 32px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.app-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.app-card .app-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.app-card img.icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  object-fit: cover;
  flex-shrink: 0;
}

.app-card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.app-card .platform-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-alt);
  border-radius: 999px;
  padding: 2px 9px;
  margin-top: 4px;
}

.app-card p.desc {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.95rem;
  flex-grow: 1;
}

.shots {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.shots img {
  height: 140px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.app-card .actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  background: var(--bg-alt);
  color: var(--text);
}

.btn:hover { border-color: var(--accent); color: var(--text); }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.btn.disabled {
  opacity: 0.55;
  pointer-events: none;
}

/* FAQ */
.faq-group {
  margin-bottom: 36px;
}

.faq-group h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.faq-group h3 img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 10px;
  background: var(--card-bg);
}

details summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

details summary::-webkit-details-marker { display: none; }

details summary::before {
  content: "+";
  display: inline-block;
  width: 18px;
  color: var(--accent);
  font-weight: 700;
}

details[open] summary::before {
  content: "\2212";
}

details p {
  color: var(--text-muted);
  margin: 10px 0 0 18px;
}

.contact-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  text-align: center;
}

.contact-card h3 { margin-top: 0; }

/* Footer */
footer.site {
  border-top: 1px solid var(--border);
  margin-top: 60px;
  padding: 28px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

footer.site a { color: var(--text-muted); }
footer.site a:hover { color: var(--text); }

@media (max-width: 600px) {
  header.site .wrap { flex-direction: column; gap: 10px; padding-bottom: 14px; }
  .hero h1 { font-size: 1.9rem; }
}