:root {
  --bg: #f4efe6;
  --panel: rgba(255, 252, 246, 0.88);
  --panel-stroke: rgba(83, 54, 26, 0.12);
  --text: #2d241d;
  --muted: #736454;
  --accent: #c85f3d;
  --accent-deep: #9d4124;
  --grid: #d6c7b4;
  --empty: #f6f0e8;
  --shadow: 0 20px 60px rgba(75, 50, 20, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 195, 113, 0.28), transparent 28%),
    radial-gradient(circle at right 20%, rgba(200, 95, 61, 0.18), transparent 24%),
    linear-gradient(180deg, #f8f3eb 0%, #efe4d3 100%);
}

.page-shell {
  width: min(1440px, calc(100% - 32px));
  margin: 24px auto 48px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.02;
  max-width: 11ch;
}

.hero-copy {
  margin: 18px 0 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.hero-card,
.panel {
  border: 1px solid var(--panel-stroke);
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  border-radius: 24px;
}

.hero-card {
  padding: 24px;
}

.hero-card-label {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 14px;
}

.hero-card ol {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  font-weight: 700;
}

.workspace {
  display: grid;
  grid-template-columns: 360px 320px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.panel {
  padding: 20px;
}

.section-title h2,
.canvas-card h3,
.filter-header h3 {
  margin: 0;
}

.section-title p,
.pattern-header p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 14px;
}

.upload-box {
  position: relative;
  display: grid;
  gap: 6px;
  margin: 20px 0;
  padding: 22px;
  border: 2px dashed rgba(157, 65, 36, 0.28);
  border-radius: 18px;
  background: rgba(255, 247, 236, 0.9);
  cursor: pointer;
}

.upload-box input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-box span {
  font-size: 18px;
  font-weight: 700;
}

.upload-box small {
  color: var(--muted);
}

.control-grid {
  display: grid;
  gap: 16px;
}

.control-grid label {
  display: grid;
  gap: 8px;
}

.control-grid span {
  font-size: 14px;
  color: var(--muted);
}

.control-grid strong {
  font-size: 14px;
}

input[type="range"],
input[type="number"],
select {
  width: 100%;
}

input[type="number"],
select {
  padding: 10px 12px;
  border: 1px solid rgba(83, 54, 26, 0.14);
  border-radius: 12px;
  background: white;
  font: inherit;
}

.checkbox-row {
  display: flex;
  align-items: center;
  grid-auto-flow: column;
  justify-content: start;
  gap: 10px;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
}

.primary-button,
.ghost-button {
  border: 0;
  border-radius: 999px;
  padding: 14px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 150ms ease, opacity 150ms ease, background 150ms ease;
}

.primary-button {
  margin-top: 20px;
  background: var(--accent);
  color: white;
}

.ghost-button {
  background: rgba(200, 95, 61, 0.12);
  color: var(--accent-deep);
}

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

.primary-button:not(:disabled):hover,
.ghost-button:not(:disabled):hover {
  transform: translateY(-1px);
}

.edit-panel {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(83, 54, 26, 0.1);
  display: grid;
  gap: 14px;
}

.selected-cell-info {
  margin: 0;
  min-height: 22px;
  color: var(--muted);
  font-size: 14px;
}

.pattern-frame.is-brush-active {
  box-shadow: inset 0 0 0 2px rgba(200, 95, 61, 0.35);
}

.edit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stats-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0 22px;
}

.stats-cards article {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 247, 236, 0.92);
  border: 1px solid rgba(83, 54, 26, 0.08);
}

.stats-cards span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
}

.stats-cards strong {
  font-size: 20px;
}

.filter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.palette-legend {
  margin-top: 16px;
  display: grid;
  gap: 10px;
  max-height: 720px;
  overflow: auto;
  padding-right: 6px;
}

.empty-state {
  min-height: 120px;
  place-items: center;
  color: var(--muted);
  text-align: center;
}

.legend-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 250, 244, 0.95);
  border: 1px solid rgba(83, 54, 26, 0.08);
}

.legend-swatch {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.12);
}

.legend-meta strong,
.legend-meta span {
  display: block;
}

.legend-meta span {
  color: var(--muted);
  font-size: 13px;
}

.canvas-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.canvas-card {
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 247, 236, 0.94);
  border: 1px solid rgba(83, 54, 26, 0.08);
}

.canvas-card canvas {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  margin-top: 12px;
  border-radius: 16px;
  background:
    linear-gradient(45deg, rgba(214, 199, 180, 0.24) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(214, 199, 180, 0.24) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(214, 199, 180, 0.24) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(214, 199, 180, 0.24) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
}

.pattern-card {
  margin-top: 18px;
}

.pattern-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}

.pattern-frame {
  margin-top: 12px;
  overflow: auto;
  border-radius: 16px;
  background: #fffdfa;
  border: 1px solid rgba(83, 54, 26, 0.08);
}

#patternCanvas {
  width: 100%;
  min-width: 520px;
  height: auto;
  display: block;
  background: #fffdfa;
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .palette-legend {
    max-height: none;
  }
}

@media (max-width: 860px) {
  .hero,
  .canvas-grid {
    grid-template-columns: 1fr;
  }

  .page-shell {
    width: min(100% - 20px, 1440px);
  }

  .stats-cards {
    grid-template-columns: 1fr;
  }
}