:root {
  color-scheme: light;
  --bg: #f3efe3;
  --bg-accent: #ddd4c1;
  --panel: rgba(255, 251, 242, 0.88);
  --text: #1f1f1f;
  --muted: #5f584a;
  --border: rgba(74, 60, 35, 0.18);
  --shadow: 0 20px 45px rgba(61, 42, 20, 0.12);
  --button: #2c4f3a;
  --button-hover: #1f3a2a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.72), transparent 30%),
    linear-gradient(135deg, var(--bg), var(--bg-accent));
}

button {
  font: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 40px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  font-size: 0.78rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  line-height: 0.96;
}

.intro {
  width: min(650px, 100%);
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.8fr);
  gap: 24px;
  align-items: stretch;
}

.cube-panel,
.card {
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.cube-panel {
  min-height: 620px;
  padding: 16px;
}

.scene-root {
  width: 100%;
  height: 100%;
  min-height: 588px;
  border-radius: 18px;
  overflow: hidden;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.95), rgba(236, 228, 211, 0.85)),
    linear-gradient(180deg, rgba(223, 211, 190, 0.3), rgba(243, 239, 227, 0.6));
}

.controls {
  display: grid;
  gap: 18px;
}

.card {
  padding: 20px;
}

.card h2 {
  margin: 0 0 14px;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.palette {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.color-button {
  display: grid;
  gap: 10px;
  justify-items: center;
  padding: 12px 10px;
  border: 1px solid transparent;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.color-button:hover,
.color-button:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
  outline: none;
}

.color-button.is-selected {
  border-color: rgba(0, 0, 0, 0.38);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.color-chip,
.selected-swatch {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  border: 2px solid rgba(0, 0, 0, 0.1);
}

.color-label {
  font-size: 0.92rem;
}

.selected-color-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.selected-label {
  font-size: 1.05rem;
  font-weight: 600;
}

.reset-button {
  width: 100%;
  padding: 14px 18px;
  border: none;
  border-radius: 16px;
  background: var(--button);
  color: #fff;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}

.reset-button:hover,
.reset-button:focus-visible {
  background: var(--button-hover);
  transform: translateY(-1px);
  outline: none;
}

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

  .cube-panel {
    min-height: 480px;
  }

  .scene-root {
    min-height: 448px;
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100% - 20px, 1180px);
    padding-top: 20px;
  }

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

  .cube-panel {
    min-height: 400px;
    padding: 10px;
  }

  .scene-root {
    min-height: 380px;
  }
}