:root {
  --bg: #f5f5f5;
  --fg: #222;
  --accent: #2c7be5;
  --accent2: #e67e22;
  --muted: #666;
  --card: #fff;
  --border: #ddd;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
}

.container {
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
}

h1 {
  margin: 0 0 8px;
  font-size: 20px;
}

h2 {
  margin: 16px 0 4px;
  font-size: 18px;
}

p.desc {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
  align-items: center;
}

button {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

button:hover {
  background: #f0f4ff;
}

button:active {
  transform: translateY(1px);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0.05);
}

select,
input[type="number"] {
  padding: 6px;
  font-size: 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card);
}

.mut-label,
.slider-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}

.mut-label input:not([type="range"]),
.mut-label select {
  padding: 6px;
  font-size: 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card);
}

.mut-label input[type="number"] {
  width: 80px;
}

.slider-label input[type="range"] {
  width: 200px;
}

.slider-value {
  min-width: 52px;
  display: inline-block;
  text-align: left;
  color: var(--muted);
}

.stats {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 6px;
}

.stats span.value {
  color: var(--fg);
  font-weight: 600;
  display: inline-block;
  text-align: right;
}

.canvas-frame {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
  position: relative;
  width: 100%;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

.canvas-frame canvas {
  width: 100%;
  height: auto;
}

canvas {
  display: block;
  background: #fff;
  max-width: 100%;
}

.note {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.value-strong {
  font-weight: 700;
}

.probability-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
  margin-bottom: 10px;
}

.prob-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.probability-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 8px;
  background: #f9fafb;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
}

.probability-row span {
  white-space: nowrap;
}

.probability-row input[type="range"] {
  width: 200px;
}

.probability-row .color-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.card {
  background: var(--card);
  border-radius: 8px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  margin-bottom: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.03);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
}


.footer {
  margin: 10px 0;
  font-size: 12px;
  color: #999;
  text-align: center;
}

.footer a {
  color: #999;
}

@media (max-width: 600px) {
  h1 {
    font-size: 20px;
  }

  .slider-label input[type="range"] {
    width: 150px;
  }

  .probability-row input {
    width: 100px;
  }
}