:root {
  --ink: #1f1d1a;
  --muted: #6b665d;
  --line: #e2ddd2;
  --bg: #faf8f4;
  --card: #ffffff;
  --accent: #2f6f5e;
  --danger: #b3412e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
a { color: inherit; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0;
}
.brand { font-weight: 800; letter-spacing: -0.02em; text-decoration: none; font-size: 18px; }
.nav { display: flex; gap: 18px; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--ink); }
.cart-count {
  display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 10px;
  background: var(--ink); color: #fff; font-size: 12px; text-align: center;
}
main { max-width: 1040px; margin: 0 auto; padding: 28px 24px 64px; }
h1 { font-size: 28px; margin: 0 0 6px; letter-spacing: -0.02em; }
.lead { color: var(--muted); margin: 0 0 24px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  overflow: hidden; text-decoration: none; display: block;
}
.swatch { height: 150px; display: flex; align-items: flex-end; padding: 12px; color: #fff; font-weight: 700; }
.card-body { padding: 12px 14px 16px; }
.card-body .name { font-weight: 600; }
.price { color: var(--muted); }
.detail { display: grid; grid-template-columns: 1.1fr 1fr; gap: 32px; }
.detail .swatch { height: 360px; border-radius: 12px; font-size: 22px; }
.sizes { display: flex; gap: 8px; margin: 16px 0; flex-wrap: wrap; }
.size {
  border: 1px solid var(--line); background: var(--card); border-radius: 8px;
  padding: 8px 14px; cursor: pointer; font: inherit;
}
.size.selected { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.btn {
  border: 0; border-radius: 10px; padding: 12px 18px; font: inherit; font-weight: 600;
  background: var(--accent); color: #fff; cursor: pointer;
}
.btn.secondary { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.btn.is-disabled { background: #b9c7c2; cursor: not-allowed; }
.notice { margin-top: 12px; padding: 10px 12px; border-radius: 8px; background: #eaf3ef; display: none; }
.notice.show { display: block; }
.notice.error { background: #f7e6e2; color: var(--danger); }
.cart-line {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0; border-bottom: 1px solid var(--line);
}
.summary { margin-top: 20px; display: flex; justify-content: space-between; font-weight: 600; }
.coupon { display: flex; gap: 8px; margin: 20px 0; }
.coupon input, .field input {
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; font: inherit; width: 100%;
}
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.terms { display: flex; gap: 8px; align-items: center; margin: 18px 0; }
.footer { text-align: center; color: var(--muted); font-size: 13px; padding: 24px; }
@media (max-width: 720px) {
  .detail { grid-template-columns: 1fr; }
  .detail .swatch { height: 220px; }
  main { padding: 20px 16px 48px; }
}