:root {
  --bg: #000000;
  --surface: #0a0a0a;
  --surface-raised: #111111;
  --text: #ffffff;
  --muted: hsl(0deg 0% 65%);
  --line: hsl(0deg 0% 100% / 14%);
  --line-strong: hsl(0deg 0% 100% / 28%);
  --font-sans: "Montserrat", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --shadow-sm: 0 0 0 1px hsl(0deg 0% 100% / 6%);
  --shadow-md: 0 16px 48px hsl(0deg 0% 0% / 45%);
  --wood-surface: #b8875a;
  --wood-edge: #5c301e;
  --wood-grain: linear-gradient(
    180deg,
    rgb(255 228 208 / 17%) 0 8%,
    transparent 8% 18%,
    rgb(88 38 22 / 20%) 18% 21%,
    transparent 21% 38%,
    rgb(255 206 176 / 12%) 38% 46%,
    transparent 46% 100%
  );

  color-scheme: dark;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
}

button {
  color: inherit;
  font: inherit;
}

.site-header {
  align-items: flex-end;
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1200px;
  padding: clamp(1.25rem, 3vw, 2rem) clamp(1rem, 3vw, 2rem) 1.1rem;
}

.site-brand {
  align-items: center;
  display: flex;
  gap: 0.85rem;
}

.site-mark {
  color: var(--text);
  display: flex;
  line-height: 0;
  text-decoration: none;
}

.site-mark:hover {
  opacity: 0.85;
}

.site-wordmark {
  border-bottom: 1px solid var(--text);
  color: var(--text);
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  padding-bottom: 0.35rem;
  text-decoration: none;
  text-transform: none;
}

.site-wordmark:hover {
  opacity: 0.88;
}

.site-tagline {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  justify-content: flex-end;
}

.site-link,
.cart-count {
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--text);
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 700;
  gap: 0.55rem;
  letter-spacing: 0.1em;
  padding: 0.4rem 0.75rem;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.site-link {
  border-color: var(--line);
}

.site-link:hover,
.site-link:focus-visible,
.cart-count:hover,
.cart-count:focus-visible {
  background: var(--text);
  color: var(--bg);
  outline: none;
}

.cart-count strong {
  align-items: center;
  background: var(--text);
  border-radius: 999px;
  color: var(--bg);
  display: inline-flex;
  justify-content: center;
  min-width: 1.45rem;
  padding: 0.15rem 0.4rem;
}

.cart-count:hover strong,
.cart-count:focus-visible strong {
  background: var(--bg);
  color: var(--text);
}

.app-shell {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin: 0 auto;
  max-width: 1200px;
  min-height: calc(100vh - 5.5rem);
  padding: clamp(0.75rem, 2vw, 1.25rem) clamp(1rem, 3vw, 2rem) clamp(2.5rem, 6vw, 4rem);
}

.hero-panel,
.why-panel,
.configurator,
.cart-panel,
.palette,
.workspace {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.hero-panel {
  align-items: start;
  border-radius: var(--radius-lg);
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.eyebrow {
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  margin: 0 0 0.65rem;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
  margin: 0;
}

h1 {
  font-size: clamp(1.65rem, 4.5vw, 2.65rem);
  max-width: 920px;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 600;
  text-transform: uppercase;
}

h3 {
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
}

.hero-copy {
  color: var(--muted);
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  font-weight: 400;
  line-height: 1.65;
  margin: 1rem 0 0;
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
}

.hero-link {
  align-items: center;
  background: var(--text);
  border: 1px solid var(--text);
  border-radius: var(--radius-sm);
  color: var(--bg);
  display: inline-flex;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.65rem 0.95rem;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.hero-link:hover,
.hero-link:focus-visible {
  background: transparent;
  color: var(--text);
  outline: none;
}

.placed-module small {
  color: var(--muted);
  line-height: 1.5;
}

.why-panel {
  border-radius: var(--radius-lg);
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.why-page {
  align-content: start;
}

.why-panel.is-standalone {
  margin-top: clamp(1rem, 3vw, 2rem);
}

.why-panel.is-standalone .why-page-actions {
  border-top: 1px solid var(--line);
  grid-column: 1 / -1;
  padding-top: 1rem;
}

.why-copy,
.why-card p {
  color: var(--muted);
  line-height: 1.65;
}

.why-copy {
  margin: 1rem 0 0;
}

.why-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.why-card {
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: grid;
  gap: 0.65rem;
  padding: 1rem;
}

.why-number {
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.why-card p {
  margin: 0;
}

.configurator {
  border-radius: var(--radius-lg);
  display: grid;
  gap: 1rem;
  grid-template-columns: 340px minmax(0, 1fr);
  padding: clamp(0.75rem, 2vw, 1.1rem);
}

.palette,
.workspace {
  background: var(--surface-raised);
  border-radius: var(--radius-md);
  padding: clamp(1rem, 2vw, 1.35rem);
}

.palette {
  position: sticky;
  top: 1rem;
}

.section-heading,
.workspace-toolbar {
  margin-bottom: 1rem;
}

.palette-note,
.workspace-help {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
  margin: 0.65rem 0 0;
}

.preview-mode-indicator {
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  display: inline-flex;
  font-size: 0.7rem;
  font-weight: 700;
  gap: 0.4rem;
  letter-spacing: 0.08em;
  margin-top: 0.8rem;
  padding: 0.38rem 0.65rem;
  text-transform: uppercase;
}

.preview-mode-indicator svg {
  height: 16px;
  width: 16px;
}

.preview-mode-indicator path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.preview-mode-indicator.is-glb {
  border-style: dashed;
  color: hsl(35deg 72% 72%);
}

.component-list {
  display: grid;
  gap: 0.65rem;
}

.component-card {
  align-items: stretch;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: grab;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: minmax(0, 92px) minmax(0, 1fr);
  padding: 0.75rem 0.85rem;
  text-align: left;
  touch-action: pan-y;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.15s ease;
}

.component-card:active,
.placed-module:active {
  cursor: grabbing;
}

.component-card:hover,
.component-card:focus-visible {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  outline: none;
  transform: translateY(-1px);
}

.component-thumb {
  align-self: stretch;
  aspect-ratio: 4 / 3;
  background: hsl(0deg 0% 5%);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: flex;
  overflow: hidden;
}

.component-thumb-img {
  display: block;
  height: 100%;
  object-fit: cover;
  object-position: center;
  width: 100%;
}

.component-card-body {
  align-items: center;
  display: flex;
  min-width: 0;
}

.component-card strong {
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.35;
  text-transform: none;
}

.finish-selector {
  border-top: 1px solid var(--line);
  margin-top: 0.85rem;
  padding-top: 0.85rem;
}

.finish-selector > h2 {
  margin-bottom: 0.5rem;
}

.finish-list {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.4rem;
}

.finish-option {
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  display: flex;
  flex: 1 1 0;
  justify-content: center;
  min-width: 0;
  padding: 0.45rem 0.35rem;
  text-align: center;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.15s ease;
}

.finish-option:hover,
.finish-option:focus-visible,
.finish-option.is-active {
  border-color: var(--text);
  box-shadow: var(--shadow-sm);
  outline: none;
}

.finish-option:hover,
.finish-option:focus-visible {
  transform: translateY(-1px);
}

.finish-swatch {
  background:
    linear-gradient(145deg, rgb(255 255 255 / 28%), rgb(0 0 0 / 18%)),
    var(--wood-grain),
    var(--wood-surface);
  background-size: auto, 100% 34px, auto;
  border: 1px solid color-mix(in srgb, var(--wood-edge) 76%, var(--text));
  border-radius: var(--radius-sm);
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 10%);
  flex-shrink: 0;
  height: 36px;
  width: 36px;
}

.finish-selected-label {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  line-height: 1.3;
  margin: 0.4rem 0 0;
  min-height: 1.3em;
  text-transform: uppercase;
}

.workspace {
  min-width: 0;
}

.workspace-toolbar {
  align-items: flex-start;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
}

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.size-selector {
  align-items: end;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 1rem;
}

.saved-design-panel {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
  padding: 1rem;
}

.workspace-actions {
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  margin-top: 1rem;
  padding: 1rem;
}

.workspace-actions h3 {
  text-transform: none;
}

.workspace-actions p:not(.eyebrow) {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
  margin: 0.45rem 0 0;
}

.saved-design-copy p:not(.eyebrow),
.save-notice {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
  margin: 0;
}

.saved-design-copy h3 {
  margin-bottom: 0.45rem;
}

.saved-design-actions {
  align-items: end;
  display: grid;
  gap: 0.65rem;
  grid-template-columns: minmax(12rem, 1fr) auto auto;
}

.saved-design-actions label,
.saved-design-result label {
  color: var(--muted);
  display: grid;
  font-size: 0.68rem;
  font-weight: 700;
  gap: 0.35rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.saved-design-actions input,
.saved-design-result input {
  background: var(--surface-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  min-width: 0;
  padding: 0.6rem 0.75rem;
}

.saved-design-actions input:focus-visible,
.saved-design-result input:focus-visible {
  border-color: var(--text);
  outline: none;
}

.saved-design-result {
  align-items: end;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.75rem;
  grid-template-columns: minmax(7rem, auto) minmax(0, 1fr) auto;
  padding-top: 1rem;
}

.saved-design-result div:first-child {
  display: grid;
  gap: 0.2rem;
}

.saved-design-result span {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.saved-design-result strong {
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.saved-design-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.saved-design-links a {
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.58rem 0.75rem;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.saved-design-links a:hover,
.saved-design-links a:focus-visible {
  background: var(--text);
  color: var(--bg);
  outline: none;
}

.save-notice.is-success {
  color: hsl(132deg 64% 72%);
}

.save-notice.is-error {
  color: hsl(4deg 84% 74%);
}

.size-selector h3 {
  margin-bottom: 0.45rem;
}

.size-selector p:not(.eyebrow) {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
  margin: 0;
  max-width: 34rem;
}

.size-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.size-controls label {
  color: var(--muted);
  display: grid;
  font-size: 0.68rem;
  font-weight: 700;
  gap: 0.35rem;
  letter-spacing: 0.1em;
  min-width: 8.5rem;
  text-transform: uppercase;
}

.size-controls select {
  appearance: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--text) 50%) right 0.8rem center / 0.4rem 0.4rem no-repeat,
    var(--surface-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.6rem 2rem 0.6rem 0.75rem;
}

.size-controls select:focus-visible {
  border-color: var(--text);
  outline: none;
}

.size-controls option:disabled {
  color: var(--muted);
}

.view-toggle {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.25rem;
}

.toolbar-actions button,
.workspace-actions button,
.saved-design-actions button,
.cart-actions button,
.cart-item button,
[data-open-catalog-modal],
.catalog-modal-header button {
  align-items: center;
  background: transparent;
  border: 1px solid var(--text);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  font-size: 0.75rem;
  font-weight: 600;
  gap: 0.35rem;
  letter-spacing: 0.06em;
  padding: 0.5rem 0.85rem;
  text-transform: uppercase;
  transition:
    background 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease;
}

.view-toggle button {
  border-color: transparent;
}

.view-toggle button[aria-pressed="true"] {
  background: var(--text);
  color: var(--bg);
}

.toolbar-actions button:hover:not(:disabled),
.workspace-actions button:hover:not(:disabled),
.saved-design-actions button:hover:not(:disabled),
.cart-actions button:hover:not(:disabled),
.cart-item button:hover,
[data-open-catalog-modal]:hover:not(:disabled),
.catalog-modal-header button:hover:not(:disabled) {
  background: var(--text);
  border-color: var(--text);
  color: var(--bg);
}

.toolbar-actions button:disabled,
.workspace-actions button:disabled,
.saved-design-actions button:disabled,
.cart-actions button:disabled,
[data-open-catalog-modal]:disabled,
.catalog-modal-header button:disabled {
  border-color: var(--line-strong);
  color: var(--muted);
  cursor: not-allowed;
  opacity: 0.65;
}

.toolbar-actions svg,
.metrics-panel svg {
  height: 18px;
  width: 18px;
}

.canvas-frame {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow: auto;
  padding: 1rem;
}

.canvas-frame-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

.catalog-modal {
  align-items: center;
  box-sizing: border-box;
  display: flex;
  inset: 0;
  justify-content: center;
  padding: clamp(1rem, 4vw, 2rem);
  position: fixed;
  z-index: 200;
}

.catalog-modal[hidden] {
  display: none;
}

.catalog-modal-backdrop {
  background: hsl(0deg 0% 0% / 72%);
  cursor: pointer;
  inset: 0;
  position: absolute;
}

.catalog-modal-panel {
  background: var(--surface-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  max-height: min(90vh, 44rem);
  max-width: min(32rem, 100%);
  min-height: 0;
  overflow: hidden;
  padding: clamp(1rem, 2.5vw, 1.35rem);
  position: relative;
  width: 100%;
  z-index: 1;
}

.catalog-modal-body {
  flex: 1 1 auto;
  margin-right: -0.35rem;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 0.35rem;
  -webkit-overflow-scrolling: touch;
}

.catalog-modal-header {
  align-items: flex-start;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: space-between;
}

.catalog-modal-header h2 {
  flex: 1 1 12rem;
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
  margin: 0;
  text-transform: uppercase;
}

.catalog-modal-header button {
  flex-shrink: 0;
}

.catalog-modal-note {
  margin: 0;
}

.catalog-modal-body .component-list {
  margin-top: 0.15rem;
}

.canvas-grid {
  background:
    linear-gradient(to right, hsl(0deg 0% 100% / 8%) 1px, transparent 1px),
    linear-gradient(to bottom, hsl(0deg 0% 100% / 8%) 1px, transparent 1px),
    linear-gradient(180deg, #0c0c0c, #080808);
  background-size: 92px 92px, 92px 92px, auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 0 0 4px hsl(0deg 0% 0% / 35%);
  min-width: max-content;
  overflow: hidden;
  position: relative;
}

.is-previewing .component-card {
  cursor: default;
  opacity: 0.72;
}

.preview3d-frame {
  background:
    radial-gradient(circle at 50% 40%, hsl(0deg 0% 100% / 10%), transparent 36rem),
    linear-gradient(180deg, #090909, #030303);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  min-height: clamp(360px, 48vw, 560px);
  overflow: hidden;
  padding: 1rem;
  perspective: 1050px;
  position: relative;
}

.preview3d-stage {
  align-items: center;
  cursor: grab;
  display: flex;
  height: 100%;
  justify-content: center;
  min-height: clamp(328px, 44vw, 528px);
  outline: none;
  touch-action: none;
  user-select: none;
}

.preview3d-stage:focus-visible {
  box-shadow: inset 0 0 0 2px hsl(0deg 0% 100% / 35%);
}

.preview3d-stage.is-rotating {
  cursor: grabbing;
}

.preview3d-model {
  height: 1px;
  position: relative;
  transform-style: preserve-3d;
  width: 1px;
}

.preview3d-module,
.preview3d-cuboid,
.preview3d-face,
.preview3d-part-face,
.preview3d-ground {
  position: absolute;
  transform-style: preserve-3d;
}

.preview3d-module {
  height: var(--module-height);
  left: 50%;
  top: 50%;
  width: var(--module-width);
}

.preview3d-cuboid {
  height: var(--part-height);
  left: 0;
  top: 0;
  transform: translate3d(var(--part-x), var(--part-y), var(--part-z));
  width: var(--part-width);
}

.preview3d-face {
  background:
    linear-gradient(145deg, rgb(255 255 255 / 24%), rgb(0 0 0 / 10%)),
    var(--wood-grain),
    linear-gradient(180deg, var(--wood-surface), color-mix(in srgb, var(--wood-surface) 78%, #000));
  background-size: auto, 100% 58px, auto;
  border: 1px solid color-mix(in srgb, var(--wood-edge) 68%, var(--accent));
  box-shadow: inset 0 0 0 1px hsl(0deg 0% 100% / 8%);
  left: 0;
  top: 0;
}

.preview3d-front,
.preview3d-back {
  align-content: center;
  display: grid;
  gap: 0.25rem;
  height: var(--module-height);
  justify-items: center;
  text-align: center;
  width: var(--module-width);
}

.preview3d-front {
  transform: translateZ(calc(var(--module-depth) / 2));
}

.preview3d-back {
  filter: brightness(0.62);
  transform: rotateY(180deg) translateZ(calc(var(--module-depth) / 2));
}

.preview3d-left,
.preview3d-right {
  filter: brightness(0.72);
  height: var(--module-height);
  left: calc((var(--module-width) - var(--module-depth)) / 2);
  width: var(--module-depth);
}

.preview3d-left {
  transform: rotateY(-90deg) translateZ(calc(var(--module-width) / 2));
}

.preview3d-right {
  transform: rotateY(90deg) translateZ(calc(var(--module-width) / 2));
}

.preview3d-top,
.preview3d-bottom {
  filter: brightness(1.08);
  height: var(--module-depth);
  top: calc((var(--module-height) - var(--module-depth)) / 2);
  width: var(--module-width);
}

.preview3d-top {
  transform: rotateX(90deg) translateZ(calc(var(--module-height) / 2));
}

.preview3d-bottom {
  filter: brightness(0.54);
  transform: rotateX(-90deg) translateZ(calc(var(--module-height) / 2));
}

.preview3d-part-face {
  background:
    linear-gradient(145deg, rgb(255 255 255 / 24%), rgb(0 0 0 / 12%)),
    var(--wood-grain),
    linear-gradient(180deg, var(--wood-surface), color-mix(in srgb, var(--wood-surface) 78%, #000));
  background-size: auto, 100% 58px, auto;
  border: 1px solid color-mix(in srgb, var(--wood-edge) 72%, var(--accent));
  box-shadow: inset 0 0 0 1px hsl(0deg 0% 100% / 8%);
  left: 0;
  top: 0;
}

.preview3d-part-front,
.preview3d-part-back {
  height: var(--part-height);
  width: var(--part-width);
}

.preview3d-part-front {
  transform: translateZ(calc(var(--part-depth) / 2));
}

.preview3d-part-back {
  filter: brightness(0.62);
  transform: rotateY(180deg) translateZ(calc(var(--part-depth) / 2));
}

.preview3d-part-left,
.preview3d-part-right {
  filter: brightness(0.72);
  height: var(--part-height);
  left: calc((var(--part-width) - var(--part-depth)) / 2);
  width: var(--part-depth);
}

.preview3d-part-left {
  transform: rotateY(-90deg) translateZ(calc(var(--part-width) / 2));
}

.preview3d-part-right {
  transform: rotateY(90deg) translateZ(calc(var(--part-width) / 2));
}

.preview3d-part-top,
.preview3d-part-bottom {
  filter: brightness(1.08);
  height: var(--part-depth);
  top: calc((var(--part-height) - var(--part-depth)) / 2);
  width: var(--part-width);
}

.preview3d-part-top {
  transform: rotateX(90deg) translateZ(calc(var(--part-height) / 2));
}

.preview3d-part-bottom {
  filter: brightness(0.54);
  transform: rotateX(-90deg) translateZ(calc(var(--part-height) / 2));
}

.preview3d-shelf-label {
  display: grid;
  gap: 0.25rem;
  justify-items: center;
  left: 50%;
  pointer-events: none;
  position: absolute;
  text-align: center;
  top: 50%;
  transform: translate3d(-50%, -50%, calc(var(--module-depth) / 2 + 8px));
}

.preview3d-front strong,
.preview3d-front small,
.preview3d-shelf-label strong,
.preview3d-shelf-label small {
  background: rgb(0 0 0 / 62%);
  border-radius: 999px;
  color: var(--text);
  padding: 0.12rem 0.45rem;
}

.preview3d-front strong,
.preview3d-shelf-label strong {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.preview3d-front small,
.preview3d-shelf-label small {
  color: var(--muted);
  font-size: 0.68rem;
}

.preview3d-ground {
  background:
    linear-gradient(to right, hsl(0deg 0% 100% / 9%) 1px, transparent 1px),
    linear-gradient(to bottom, hsl(0deg 0% 100% / 9%) 1px, transparent 1px),
    hsl(0deg 0% 100% / 3%);
  background-size: 58px 58px;
  border: 1px solid var(--line-strong);
  left: 50%;
  top: calc(50% + var(--preview-floor-y, 0px));
  transform: translate3d(-50%, -50%, var(--preview-floor-z, -34px)) rotateX(90deg);
}

.preview3d-empty {
  align-content: center;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--muted);
  display: grid;
  min-height: clamp(328px, 44vw, 528px);
  padding: 2rem;
  text-align: center;
}

.preview3d-empty h3 {
  color: var(--text);
}

.preview3d-empty p:last-child {
  margin: 0.75rem auto 0;
  max-width: 24rem;
}

.glb-preview-frame {
  background:
    radial-gradient(circle at 50% 30%, hsl(35deg 70% 52% / 10%), transparent 32rem),
    linear-gradient(180deg, #090909, #030303);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  min-height: clamp(360px, 48vw, 560px);
  overflow: auto;
  padding: 1rem;
}

.glb-empty {
  align-content: center;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--muted);
  display: grid;
  min-height: clamp(328px, 44vw, 528px);
  padding: 2rem;
  text-align: center;
}

.glb-empty h3 {
  color: var(--text);
}

.glb-empty code {
  color: var(--text);
}

.glb-missing-list {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  justify-self: center;
  margin-top: 1rem;
  max-width: 26rem;
  padding: 0.85rem 1rem;
  text-align: left;
}

.glb-missing-list strong {
  color: var(--text);
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.glb-missing-list ul {
  margin: 0;
  padding-left: 1.1rem;
}

.glb-status {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
  margin: 0 0 0.85rem;
}

.glb-stage {
  background:
    linear-gradient(to right, hsl(0deg 0% 100% / 8%) 1px, transparent 1px),
    linear-gradient(to bottom, hsl(0deg 0% 100% / 8%) 1px, transparent 1px),
    hsl(0deg 0% 100% / 3%);
  background-size: 58px 58px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  box-shadow: inset 0 0 0 4px hsl(0deg 0% 0% / 28%);
  min-width: max-content;
  position: relative;
}

.glb-module-slot {
  align-content: center;
  border-radius: var(--radius-sm);
  display: grid;
  justify-items: center;
  left: 0;
  padding: 0.5rem;
  position: absolute;
  text-align: center;
  top: 0;
}

.glb-module-slot.is-missing {
  background: hsl(35deg 70% 55% / 10%);
  border: 1px dashed hsl(35deg 72% 72% / 70%);
  color: var(--muted);
}

.glb-module-slot.has-asset {
  background: hsl(0deg 0% 100% / 5%);
  border: 1px solid var(--line);
}

.glb-module-slot strong,
.glb-module-slot small {
  background: rgb(0 0 0 / 58%);
  border-radius: 999px;
  padding: 0.12rem 0.45rem;
}

.glb-module-slot strong {
  color: var(--text);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.glb-module-slot small {
  color: var(--muted);
  font-size: 0.68rem;
  margin-top: 0.25rem;
}

.glb-model-viewer {
  height: 100%;
  width: 100%;
}

.placed-module,
.drop-preview {
  border-radius: var(--radius-sm);
  left: 0;
  position: absolute;
  top: 0;
}

.placed-module {
  align-content: center;
  background:
    linear-gradient(145deg, rgb(255 255 255 / 22%), transparent),
    var(--wood-grain),
    linear-gradient(180deg, var(--wood-surface), color-mix(in srgb, var(--wood-surface) 80%, #000));
  background-size: auto, 100% 58px, auto;
  border: 1px solid color-mix(in srgb, var(--wood-edge) 78%, var(--text));
  box-shadow: 0 8px 24px hsl(0deg 0% 0% / 35%);
  cursor: grab;
  display: grid;
  gap: 0.2rem;
  justify-items: center;
  padding: 0.45rem;
  text-align: center;
  touch-action: none;
  transition:
    box-shadow 0.15s ease,
    filter 0.15s ease;
}

.placed-module.is-shelf {
  background:
    linear-gradient(145deg, rgb(255 255 255 / 12%), rgb(0 0 0 / 16%)),
    color-mix(in srgb, var(--wood-surface) 16%, transparent);
  overflow: hidden;
}

.placed-module.is-half-depth {
  outline: 1px dashed color-mix(in srgb, var(--accent) 68%, var(--text));
  outline-offset: -7px;
}

.placed-module:hover,
.placed-module:focus-visible {
  box-shadow: 0 12px 32px hsl(0deg 0% 0% / 55%);
  filter: brightness(1.08);
  outline: 2px solid hsl(0deg 0% 100% / 35%);
}

.placed-shelf-frame {
  inset: 0.48rem;
  pointer-events: none;
  position: absolute;
  z-index: 0;
}

.placed-module > .placed-shelf-frame {
  color: inherit;
  font-size: inherit;
}

.placed-shelf-frame i {
  background:
    linear-gradient(145deg, rgb(255 255 255 / 24%), rgb(0 0 0 / 12%)),
    var(--wood-grain),
    var(--wood-surface);
  background-size: auto, 100% 44px, auto;
  border: 1px solid color-mix(in srgb, var(--wood-edge) 78%, var(--text));
  display: block;
  position: absolute;
}

.placed-shelf-post {
  bottom: 0;
  top: 0;
  width: 8px;
}

.placed-shelf-post.is-front-left {
  left: 0;
}

.placed-shelf-post.is-front-right {
  right: 0;
}

.placed-shelf-post.is-back-left {
  filter: brightness(0.72);
  left: 20%;
}

.placed-shelf-post.is-back-right {
  filter: brightness(0.72);
  right: 20%;
}

.placed-shelf-board {
  height: 7px;
  left: 0;
  right: 0;
}

.placed-module > span {
  color: rgb(255 255 255 / 95%);
  font-size: 1.5rem;
}

.placed-module strong,
.placed-module small,
.placed-module em {
  background: rgb(0 0 0 / 55%);
  border-radius: 999px;
  color: var(--text);
  padding: 0.1rem 0.45rem;
  position: relative;
  z-index: 1;
}

.placed-module em {
  cursor: pointer;
  font-size: 0.68rem;
  font-style: normal;
  /* Visible by default so touch and no-hover devices can reach Remove. */
  opacity: 1;
  transition: opacity 0.15s ease;
}

/* Fine pointer + real hover: keep chrome minimal until hover or focus. */
@media (hover: hover) and (pointer: fine) {
  .placed-module em {
    opacity: 0;
  }

  .placed-module:hover em,
  .placed-module:focus-visible em,
  .placed-module:focus-within em {
    opacity: 1;
  }
}

.drop-preview {
  align-items: center;
  background:
    linear-gradient(145deg, rgb(255 255 255 / 16%), rgb(0 0 0 / 8%)),
    var(--wood-grain),
    color-mix(in srgb, var(--wood-surface) 78%, #000);
  background-size: auto, 100% 58px, auto;
  border: 2px dashed var(--text);
  color: var(--text);
  display: flex;
  font-size: 0.75rem;
  font-weight: 700;
  justify-content: center;
  letter-spacing: 0.04em;
  pointer-events: none;
  text-align: center;
  text-transform: uppercase;
  z-index: 5;
}

.drop-preview.is-blocked {
  background: hsl(0deg 70% 50% / 15%);
  border-color: hsl(0deg 80% 65%);
  color: hsl(0deg 85% 78%);
}

.metrics-panel {
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.metrics-panel span {
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 500;
  gap: 0.35rem;
  letter-spacing: 0.04em;
  padding: 0.45rem 0.65rem;
  text-transform: uppercase;
}

.cart-panel {
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 2.5vw, 1.5rem);
}

.cart-heading {
  align-items: flex-start;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
}

.cart-summary {
  align-items: flex-end;
  display: grid;
  gap: 0.1rem;
  justify-items: end;
  min-width: 9rem;
}

.cart-summary strong {
  font-size: clamp(1.65rem, 4vw, 2.35rem);
  line-height: 1;
}

.cart-summary span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cart-items {
  display: grid;
  gap: 0.65rem;
  margin-top: 1rem;
}

.cart-item {
  align-items: center;
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr auto;
  padding: 1rem;
}

.cart-item p:not(.eyebrow),
.cart-item small,
.cart-empty {
  color: var(--muted);
  line-height: 1.55;
}

.cart-item p:not(.eyebrow) {
  margin: 0.4rem 0 0.15rem;
}

.cart-item small {
  font-size: 0.72rem;
}

.cart-empty {
  background: var(--surface-raised);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  margin: 0;
  padding: 1rem;
}

.cart-actions {
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  display: flex;
  justify-content: flex-end;
  margin-top: 1rem;
}

.checkout-notice {
  color: var(--muted);
  flex: 1;
  font-size: 0.78rem;
  line-height: 1.55;
  margin: 0;
  min-width: min(100%, 18rem);
}

.checkout-notice.is-success {
  color: hsl(132deg 64% 72%);
}

.checkout-notice.is-error {
  color: hsl(4deg 84% 74%);
}

@media (max-width: 980px) {
  .hero-panel,
  .why-panel,
  .configurator {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .palette {
    position: static;
  }

  .component-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.75rem;
  }

  .site-actions {
    justify-content: flex-start;
  }

  .app-shell {
    padding: 0.5rem 0.85rem 2rem;
  }

  .hero-panel,
  .why-panel,
  .configurator,
  .cart-panel,
  .palette,
  .workspace {
    border-radius: var(--radius-md);
  }

  .component-list,
  .workspace-toolbar {
    grid-template-columns: 1fr;
  }

  .component-list {
    display: grid;
  }

  .workspace-toolbar {
    align-items: stretch;
    display: grid;
  }

  .toolbar-actions button {
    flex: 1;
    justify-content: center;
  }

  .view-toggle {
    width: 100%;
  }

  .view-toggle button {
    justify-content: center;
  }

  .size-selector,
  .size-controls,
  .workspace-actions,
  .saved-design-actions,
  .saved-design-result {
    align-items: stretch;
    display: grid;
    grid-template-columns: 1fr;
  }

  .workspace-actions button {
    justify-content: center;
  }

  .cart-item {
    grid-template-columns: 1fr;
  }

  .cart-heading {
    flex-direction: column;
  }

  .cart-summary {
    align-items: start;
    justify-items: start;
  }

  .canvas-frame {
    margin-inline: -0.25rem;
    padding: 0.75rem;
  }
}