:root {
  --bg: #fdfcf9;
  --surface: #ffffff;
  --border: #e4e1d8;
  --text: #1f1d18;
  --text-muted: #6b6656;
  --accent: #8a6d3b;
  --accent-contrast: #ffffff;
  --error: #b3421d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --surface: #211d16;
    --border: #3a352a;
    --text: #ece7db;
    --text-muted: #a89f8b;
    --accent: #d3ab6e;
    --accent-contrast: #17140f;
    --error: #e0805a;
  }
}

* { 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: 1.5;
}

a { color: var(--accent); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1.1rem;
}

.brand-mark { font-size: 1.3rem; }

.button {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  font-weight: 500;
}

.button-primary {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
}

.button-large { padding: 12px 28px; font-size: 1.05rem; }

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px;
}

.hero { text-align: center; padding-bottom: 32px; }
.hero h1 { font-size: 2rem; margin-bottom: 12px; }
.hero-sub { color: var(--text-muted); max-width: 520px; margin: 0 auto 28px; }
.hero-hint { color: var(--text-muted); font-size: 0.9rem; margin-top: 16px; }

.how { padding: 32px 0; border-top: 1px solid var(--border); }
.how ol { color: var(--text-muted); padding-left: 20px; }
.how li { margin-bottom: 8px; }

.products { padding: 32px 0; border-top: 1px solid var(--border); }
.product-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.product-card {
  display: block;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
}
.product-card h3 { margin: 0 0 6px; }
.product-card p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.85rem;
}