:root {
  --ink: #1c1c1c;
  --paper: #faf8f5;
  --muted: #6b6b6b;
  --line: #e2ddd6;
  --accent: #2f6f4f;
  --accent-dark: #234f38;
  --danger: #a8442f;
  --radius: 8px;
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.45;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

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

.site-header .bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.85rem 1.25rem;
  max-width: 1100px;
  margin: 0 auto;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}

.site-nav {
  display: flex;
  gap: 1rem;
  margin-left: auto;
  align-items: center;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
}

.cart-link {
  position: relative;
  font-weight: 600;
}

.cart-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-size: 0.72rem;
  padding: 0.05rem 0.4rem;
  margin-left: 0.35rem;
  min-width: 1.1rem;
  text-align: center;
}

.search-form {
  display: flex;
  flex: 1;
  max-width: 360px;
}

.search-form input {
  flex: 1;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius) 0 0 var(--radius);
  font-size: 0.9rem;
}

.search-form button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  padding: 0.45rem 0.75rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  cursor: pointer;
}

/* footer */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer .links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

/* toolbar (filters/sort on listing page) */
.toolbar {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin: 1.5rem 0 1rem;
}

.toolbar select {
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.chip-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.chip {
  border: 1px solid var(--line);
  background: #fff;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--ink);
}

.chip.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.result-count {
  color: var(--muted);
  font-size: 0.85rem;
  margin-left: auto;
}

/* product grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--ink);
}

.swatch {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.05em;
}

.card-body {
  padding: 0.75rem 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.card-brand {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.card-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.card-price {
  margin-top: auto;
  font-weight: 700;
}

.card-actions {
  padding: 0 0.85rem 0.85rem;
}

/* buttons */
.btn {
  display: inline-block;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  padding: 0.55rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-secondary {
  background: #fff;
  color: var(--ink);
}

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

.btn-block { display: block; width: 100%; }
.btn-sm { padding: 0.3rem 0.65rem; font-size: 0.8rem; }

/* empty state */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
}

/* product detail */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin: 2rem 0;
}

@media (max-width: 720px) {
  .product-detail { grid-template-columns: 1fr; }
}

.product-detail .swatch {
  border-radius: var(--radius);
  font-size: 3rem;
  aspect-ratio: 1 / 1;
}

.price-lg {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0.5rem 0;
}

.option-group { margin: 1.25rem 0; }
.option-group label.group-label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.size-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.size-btn {
  border: 1px solid var(--line);
  background: #fff;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  min-width: 2.5rem;
}

.size-btn.active { border-color: var(--ink); background: var(--ink); color: #fff; }

.qty-row { display: flex; align-items: center; gap: 0.6rem; }
.qty-row button {
  width: 2rem; height: 2rem;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
}
.qty-row input {
  width: 3rem;
  text-align: center;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-msg { font-size: 0.8rem; color: var(--danger); min-height: 1.1em; }

.related h2 { font-size: 1.1rem; }

/* cart table */
.cart-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.cart-table th, .cart-table td {
  text-align: left;
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
.cart-table .line-item { display: flex; gap: 0.75rem; align-items: center; }
.cart-table .mini-swatch {
  width: 52px; height: 52px;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 0.9rem; flex-shrink: 0;
}

.cart-summary {
  max-width: 320px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: #fff;
}

.summary-row { display: flex; justify-content: space-between; margin: 0.35rem 0; font-size: 0.92rem; }
.summary-row.total { font-weight: 700; font-size: 1.05rem; border-top: 1px solid var(--line); padding-top: 0.6rem; margin-top: 0.6rem; }

/* checkout */
.checkout-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2.5rem; margin: 2rem 0; align-items: start; }
@media (max-width: 780px) { .checkout-layout { grid-template-columns: 1fr; } }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-grid .full { grid-column: 1 / -1; }

.field { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 0.15rem; }
.field label { font-size: 0.85rem; font-weight: 600; }
.field input, .field select {
  padding: 0.55rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.95rem;
}
.field input.invalid, .field select.invalid { border-color: var(--danger); }

fieldset { border: 1px solid var(--line); border-radius: var(--radius); margin: 1.5rem 0; padding: 1rem 1.25rem; }
legend { font-weight: 700; padding: 0 0.4rem; }

/* confirmation */
.confirm-box {
  max-width: 560px;
  margin: 3rem auto;
  text-align: center;
}
.confirm-box .order-id {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.4rem 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin: 0.75rem 0 1.5rem;
}

/* 404 */
.notfound-box {
  max-width: 480px;
  margin: 4rem auto;
  text-align: center;
}
.notfound-box .code {
  font-size: 4rem;
  font-weight: 800;
  color: var(--line);
  line-height: 1;
}

.hero {
  padding: 2rem 0 0.5rem;
}
.hero h1 { margin-bottom: 0.25rem; }
.hero p { color: var(--muted); margin-top: 0; }