:root {
  --color-bg: #f7f7f9;
  --color-text: #1f1f1f;
  --color-muted: #6b6b6b;
  --color-accent: #3b5bfd;
  --color-card-bg: #ffffff;
  --color-border: #e3e3e8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

.roulette-app {
  max-width: 480px;
  margin: 2rem auto 4rem;
  padding: 0 1.5rem;
  text-align: center;
}

.roulette-app h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
}

.description {
  margin: 0 0 2rem;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.wheel-area {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
}

.wheel-pointer {
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 12px solid transparent;
  border-right: 12px solid transparent;
  border-top: 20px solid var(--color-accent);
  z-index: 2;
}

.wheel-wrap {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.wheel {
  display: block;
  transition: transform 4s cubic-bezier(0.17, 0.67, 0.12, 0.99);
}

.wheel-outline {
  fill: var(--color-card-bg);
  stroke: var(--color-border);
  stroke-width: 2;
}

.wheel-slice-text {
  fill: #ffffff;
  font-size: 8px;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
}

.wheel-empty-text {
  fill: var(--color-muted);
  font-size: 9px;
  text-anchor: middle;
  dominant-baseline: middle;
}

.btn {
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
}

.btn:hover:not(:disabled) {
  background: #f0f0f4;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: #2f4bd9;
}

.btn-small {
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
  border-radius: 8px;
}

.result-text {
  margin: 1rem 0 0;
  min-height: 1.6rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent);
}

.settings {
  margin-top: 2.5rem;
  text-align: left;
}

.setting-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.setting-label {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.item-form {
  display: flex;
  gap: 0.5rem;
  width: 100%;
}

.item-form input[type="text"] {
  flex: 1;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.item-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.item-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
}

.item-row .swatch {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.item-row .item-name {
  flex: 1;
  font-size: 0.95rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.item-row .remove-btn {
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-muted);
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
}

.item-row .remove-btn:hover {
  background: #fde8e8;
  color: #c0392b;
  border-color: #f3b8b8;
}

.empty-hint {
  color: var(--color-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 0.5rem 0;
}