:root {
  --bg: #fbfbfb;
  --fg: #222;
  --muted: #666;
  --accent: #2563eb;
  --card: #ffffff;
  --ring: rgba(37, 99, 235, 0.35);
  --border: #e5e7eb;
  --die-color: #111827;
  --button-bg: var(--card);
  --button-fg: var(--fg);
  --button-border: var(--border);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem;
}
.app-title { margin: .5rem 0 0; font-size: clamp(1.25rem, 2.2vw + 1rem, 2rem); }
.tagline { margin: .25rem 0 1rem; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.card + .card {
  margin-top: 1rem;
}
.die-face {
  font-size: clamp(4rem, 10vw, 7rem);
  line-height: 1;
  text-align: center;
  margin: .25rem 0 .5rem;
  user-select: none;
  color: var(--die-color);
}
.value-text {
  text-align: center;
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: .75rem;
}
.controls {
  display: flex;
  gap: .5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: .75rem;
}
.controls label {
  display: flex;
  align-items: center;
  font-weight: 600;
  margin-right: .25rem;
}
button {
  appearance: none;
  border: 1px solid var(--button-border, var(--border));
  background: var(--button-bg, var(--card));
  padding: .6rem .9rem;
  border-radius: 10px;
  font: inherit;
  cursor: pointer;
  color: var(--button-fg, var(--fg));
}
button:hover { border-color: var(--accent); }
button:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.history {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: .25rem;
  font-variant-numeric: tabular-nums;
  align-items: center;
  justify-items: center;
}
.card-title {
  margin: 0 0 .25rem;
  font-size: 1.1rem;
}
.card-description {
  margin: 0 0 .75rem;
  color: var(--muted);
}
.select-field {
  border: 1px solid var(--border);
  background: var(--card);
  padding: .5rem .75rem;
  border-radius: 10px;
  font: inherit;
  margin-left: .5rem;
  min-width: 10rem;
}
.select-field:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}
.color-preview {
  display: inline-block;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  margin-left: .5rem;
}
.button-color-preview {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: .875rem;
  width: 2.5rem;
  height: 2rem;
}
.helper-text {
  margin: .5rem 0 0;
  color: var(--muted);
  font-size: .875rem;
}
.chip {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 8px;
  padding: .25rem .5rem;
  min-width: 2rem;
  text-align: center;
}
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 1px, 1px);
  white-space: nowrap; border: 0;
}
.footer { color: var(--muted); }