:root {
  --bg: #12100e;
  --bg-2: #1a1714;
  --panel: #201c18;
  --line: #3a332c;
  --line-strong: #5a4e42;
  --brass: #d4b483;
  --brass-dim: #9a7d52;
  --ink: #f3ece3;
  --muted: #9a9186;
  --danger: #e07a5f;
  --check-a: #2a2622;
  --check-b: #1c1916;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background:
    radial-gradient(1200px 500px at 10% -10%, #2a221c 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: Outfit, system-ui, sans-serif;
}

body {
  min-height: 100vh;
}

#app {
  max-width: 1600px;
  margin: 0 auto;
  padding: 16px 28px 20px;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: conic-gradient(
    from 210deg,
    #8a5a2b,
    #e8c99a,
    #c9a066,
    #6b4423,
    #e8c99a
  );
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.brand h1 {
  margin: 0;
  font-family: "Playfair Display", Georgia, sans-serif;
  font-size: 26px;
  letter-spacing: 0.04em;
  line-height: 1;
}

.brand p,
.topbar-meta,
.hint,
.count,
.sizes-label {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 16px;
  align-items: start;
}

.panel {
  background: linear-gradient(180deg, #241f1b 0%, var(--panel) 40%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

.block + .block {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.block-head h2 {
  margin: 0;
  font-family: Fraunces, Georgia, serif;
  font-size: 18px;
  font-weight: 500;
}

.specimen {
  font-family: Outfit, sans-serif;
  font-size: 12px;
  color: var(--brass);
  letter-spacing: 0.02em;
}

.search {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0 12px;
}

.search:focus-within {
  border-color: var(--brass-dim);
}

.search i {
  color: var(--muted);
}

.search input {
  flex: 1;
  height: 38px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  outline: none;
}

.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: 5px;
  max-height: 220px;
  overflow: auto;
  padding: 2px 2px 6px;
  margin-top: 8px;
}

.icon-btn {
  aspect-ratio: 1;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--bg-2);
  color: var(--ink);
  cursor: pointer;
  font-size: 18px;
  display: grid;
  place-items: center;
}

.icon-btn:hover {
  border-color: var(--line-strong);
}

.icon-btn.active {
  background: #2d261f;
  border-color: var(--brass);
  color: var(--brass);
}

.sizes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.stage-bg-toggle {
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
}

.stage-bg-toggle button,
.sizes button,
.primary {
  font: inherit;
  cursor: pointer;
}

.stage-bg-toggle button,
.sizes button {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--muted);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  white-space: nowrap;
  flex-shrink: 0;
}

.stage-bg-toggle button.active,
.sizes button.active {
  color: var(--bg);
  background: var(--brass);
  border-color: var(--brass);
}

.swatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: 6px;
}

.swatch {
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 8px;
  padding: 4px;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
}

.swatch img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 5px;
}

.swatch span {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.swatch.active {
  border-color: var(--brass);
  color: var(--ink);
}

.stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 220px;
  border-radius: 12px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.stage.check {
  background:
    linear-gradient(45deg, var(--check-a) 25%, transparent 25%) 0 0 / 18px 18px,
    linear-gradient(-45deg, var(--check-a) 25%, transparent 25%) 0 9px / 18px
      18px,
    linear-gradient(45deg, transparent 75%, var(--check-a) 75%) 9px -9px / 18px
      18px,
    linear-gradient(-45deg, transparent 75%, var(--check-a) 75%) -9px 0 / 18px
      18px,
    var(--check-b);
}

.stage.dark {
  background: #0b0a09;
}

.stage.light {
  background: #efe7dc;
}

.stage canvas {
  width: 168px;
  height: auto;
  margin-bottom: 28px;
}

.stage-bg-toggle {
  position: absolute;
  left: 50%;
  bottom: 8px;
  transform: translateX(-50%);
  justify-content: center;
  width: max-content;
  padding: 4px;
  border-radius: 999px;
  background: rgba(18, 16, 14, 0.72);
  backdrop-filter: blur(8px);
}

.stage.light .stage-bg-toggle {
  background: rgba(239, 231, 220, 0.82);
}

.slider {
  display: block;
  margin: 12px 0 4px;
  color: var(--muted);
  font-size: 12px;
}

.slider em {
  color: var(--ink);
  font-style: normal;
}

.slider input {
  width: 100%;
  margin-top: 6px;
  accent-color: var(--brass);
}

.sizes {
  align-items: center;
  margin: 12px 0;
}

.actions {
  margin-top: 4px;
}

.primary {
  display: block;
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 500;
  font-size: 13px;
  background: var(--brass);
  color: #1a140e;
  margin-top: 22px;
}

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

.hint.error,
.error {
  color: var(--danger);
}

code {
  font-size: 12px;
  color: var(--brass);
}

.icon-grid::-webkit-scrollbar {
  width: 8px;
}

.icon-grid::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 99px;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    order: -1;
  }
}