:root {
  --bg: #f4f4f5;
  --card-bg: #ffffff;
  --text: #1c1c1e;
  --muted: #6b7280;
  --border: #d4d4d8;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --error: #b91c1c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #18181b;
    --card-bg: #232326;
    --text: #f4f4f5;
    --muted: #9ca3af;
    --border: #3f3f46;
    --accent: #3b82f6;
    --accent-text: #0b1220;
    --error: #f87171;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 2rem 1rem;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.card {
  width: 100%;
  max-width: 28rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.5rem;
}

h1 {
  margin: 0 0 0.4rem;
  font-size: 1.25rem;
}

.note {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.field {
  margin-bottom: 1.25rem;
}

.field label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
}

.field-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.field-row label {
  margin-bottom: 0;
}

textarea,
select {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.4rem;
  background: var(--card-bg);
  color: var(--text);
  font: inherit;
  resize: vertical;
}

.field-row select {
  width: auto;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tab {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.4rem;
  background: var(--card-bg);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.tab.active {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.wheel-area {
  position: relative;
  display: flex;
  justify-content: center;
  margin: 1.5rem 0 1rem;
}

.wheel-pointer {
  position: absolute;
  top: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 12px solid transparent;
  border-right: 12px solid transparent;
  border-top: 20px solid var(--text);
  z-index: 1;
}

.wheel-spin {
  transition: transform 4s cubic-bezier(0.15, 0.65, 0.15, 1);
}

#wheel-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 50%;
}

button#spin-button,
button#roll-button {
  width: 100%;
  padding: 0.65rem;
  border: none;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button#spin-button:hover,
button#roll-button:hover {
  filter: brightness(1.05);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.result {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  min-height: 1.5rem;
  margin: 0.25rem 0 1rem;
}

.error {
  color: var(--error);
  font-size: 0.85rem;
  text-align: center;
  margin: -0.5rem 0 1rem;
}

.dice-3d {
  width: 100%;
  height: 9rem;
  margin: 1rem 0;
}

#dice-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.dice-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 1rem 0;
}

.dice-row[hidden],
.dice-3d[hidden] {
  display: none;
}

.die {
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--bg);
}