.calc-page {
  width: min(var(--pd-max), calc(100% - 2 * var(--space)));
  margin: 0 auto 3rem;
}

.calc-head {
  padding: 1.25rem 0 1rem;
}

.calc-breadcrumb {
  display: flex;
  gap: 0.45rem;
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

.calc-breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
}

.calc-breadcrumb a:hover {
  color: var(--color-accent);
}

.calc-head h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.calc-lead {
  margin: 0;
  color: var(--color-muted);
  max-width: 62ch;
}

.calc-group-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.calc-group-tab {
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  color: var(--color-text);
  border-radius: 999px;
  padding: 0.45rem 1rem;
  font: inherit;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.calc-group-tab.is-active,
.calc-group-tab:hover {
  border-color: var(--color-accent);
  background: rgba(212, 160, 23, 0.12);
}

.calc-layout {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 1.25rem;
  align-items: start;
}

.calc-panel,
.calc-summary-card {
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}

.calc-panel {
  padding: 1rem 1.1rem 1.25rem;
}

.calc-step {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-line);
}

.calc-step:last-child {
  border-bottom: 0;
}

.calc-step h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 700;
}

.calc-type-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(6.5rem, 1fr));
  gap: 0.55rem;
}

.calc-type-btn {
  display: grid;
  gap: 0.35rem;
  justify-items: center;
  text-align: center;
  padding: 0.55rem 0.4rem 0.65rem;
  font-size: 0.78rem;
  line-height: 1.25;
}

.calc-type-icon {
  width: 3.25rem;
  height: 3.25rem;
  object-fit: contain;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--color-line);
}

.calc-type-btn,
.calc-chip,
.calc-fabric {
  border: 1px solid var(--color-line);
  background: var(--color-paper-soft);
  color: var(--color-ink);
  border-radius: var(--radius-md);
  padding: 0.55rem 0.85rem;
  font: inherit;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.calc-type-btn:hover,
.calc-chip:hover,
.calc-fabric:hover {
  border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-line));
}

.calc-type-btn.is-active,
.calc-chip.is-active,
.calc-fabric.is-active {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 12%, #fff);
  color: var(--color-ink);
}

.calc-size-row {
  display: flex;
  align-items: end;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.calc-size-row label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.calc-size-row input {
  width: 8.5rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font: inherit;
}

.calc-size-x {
  padding-bottom: 0.55rem;
  color: var(--color-muted);
}

.calc-check {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.92rem;
  cursor: pointer;
}

.calc-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.calc-colors {
  gap: 0.35rem;
}

.calc-color {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--color-line);
  background: #fff;
  border-radius: var(--radius-md);
  padding: 0.35rem 0.55rem 0.35rem 0.35rem;
  font-size: 0.78rem;
  cursor: pointer;
}

.calc-color-preview {
  width: 2.5rem;
  height: 1.75rem;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-line);
}

.calc-color.is-active {
  border-color: var(--color-accent);
  box-shadow: inset 0 0 0 1px var(--color-accent);
}

.calc-color-swatch {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.calc-color-white { background: #fff; }
.calc-color-beige { background: #e8dcc8; }
.calc-color-gray { background: #b8b8b8; }
.calc-color-dark-gray { background: #666; }
.calc-color-blue { background: #7eb8d8; }
.calc-color-yellow { background: #f0d060; }
.calc-color-green { background: #7fb87a; }
.calc-color-gold { background: #ffcf33; }
.calc-color-brown { background: #8b5a2b; }
.calc-color-red { background: #c44; }
.calc-color-orange { background: #e8943a; }
.calc-color-peach { background: #f4b183; }
.calc-color-pink { background: #e8a0b0; }
.calc-color-silver { background: #c0c0c0; }
.calc-color-blue-dark { background: #3a6ea5; }
.calc-color-purple { background: #9b7ec9; }
.calc-color-black { background: #222; }

.calc-fabrics {
  display: grid;
  gap: 0.45rem;
}

.calc-fabric {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.65rem;
  align-items: center;
  text-align: left;
  padding: 0.55rem 0.65rem;
}

.calc-fabric-thumb {
  width: 5.5rem;
  height: 3.75rem;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: var(--color-paper-soft);
}

.calc-fabric-text {
  display: grid;
  gap: 0.12rem;
}

.calc-summary-preview {
  margin: -0.25rem -0.35rem 0.85rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-line);
  background: var(--color-paper-soft);
}

.calc-summary-preview img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.calc-fabric span {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.calc-fabric small {
  color: var(--color-muted);
  font-size: 0.78rem;
}

.calc-empty {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.calc-summary {
  position: sticky;
  top: 5.5rem;
  display: grid;
  gap: 0.75rem;
}

.calc-summary-card {
  padding: 1rem 1.1rem;
}

.calc-summary-placeholder {
  margin: 0;
  color: var(--color-muted);
}

.calc-summary-title {
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.calc-summary-meta {
  margin: 0 0 1rem;
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
}

.calc-summary-meta div {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
}

.calc-summary-meta dt {
  color: var(--color-muted);
}

.calc-summary-meta dd {
  margin: 0;
  text-align: right;
}

.calc-price-block {
  border-top: 1px solid var(--color-line);
  padding-top: 0.85rem;
  display: grid;
  gap: 0.35rem;
}

.calc-price-ref {
  color: var(--color-muted);
  font-size: 0.88rem;
}

.calc-price-main {
  font-size: 1.15rem;
}

.calc-price-main strong,
.calc-price-delivery strong {
  color: var(--color-accent);
  font-size: 1.35rem;
}

.calc-price-save {
  font-size: 0.85rem;
  color: var(--color-ok);
}

.calc-actions {
  display: grid;
  gap: 0.55rem;
}

.calc-btn-measure {
  text-align: center;
  text-decoration: none;
}

.calc-btn-cart {
  background: var(--color-accent);
  color: #fff;
  border: 0;
  cursor: pointer;
  width: 100%;
}

.calc-btn-checkout {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  text-align: center;
  text-decoration: none;
  width: 100%;
}

.calc-note,
.calc-cart-info {
  margin: 0;
  font-size: 0.78rem;
  color: var(--color-muted);
  line-height: 1.45;
}

.calc-stock {
  margin-top: 2rem;
}

.calc-stock h2 {
  margin: 0 0 0.35rem;
}

.calc-stock-hint {
  margin: 0 0 1rem;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.calc-stock-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.85rem;
}

.calc-stock-card {
  position: relative;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-paper-soft);
  padding: 0.85rem;
  display: grid;
  gap: 0.35rem;
}

.calc-stock-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  margin-bottom: 0.25rem;
  background: #fff;
}

.calc-stock-card h3 {
  margin: 0;
  font-size: 0.95rem;
}

.calc-stock-sub,
.calc-stock-meta {
  margin: 0;
  font-size: 0.82rem;
  color: var(--color-muted);
}

.calc-stock-price {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
}

.calc-stock-old {
  color: var(--color-muted);
  text-decoration: line-through;
  font-size: 0.82rem;
}

.calc-stock-price strong {
  color: var(--color-accent);
  font-size: 1.1rem;
}

.calc-stock-badge {
  position: absolute;
  top: 0.65rem;
  right: 0.65rem;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: color-mix(in srgb, var(--color-accent) 18%, #fff);
  color: var(--color-accent);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-pill);
}

.calc-stock-add {
  margin-top: 0.35rem;
  width: 100%;
  border: 0;
  cursor: pointer;
}

@media (max-width: 960px) {
  .calc-layout {
    grid-template-columns: 1fr;
  }

  .calc-summary {
    position: static;
  }
}