:root {
  --paper: #e7d7bd;
  --ink: #121212;
  --muted: rgba(0,0,0,.6);
  --muted-weak: rgba(0,0,0,.45);
  --input-bg: #ffffff;
  --input-border: rgba(0,0,0,.2);
  --swatch-border: rgba(0,0,0,.15);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 10%, rgba(0,0,0,.025), transparent 50%),
    radial-gradient(circle at 80% 90%, rgba(0,0,0,.03), transparent 50%),
    repeating-linear-gradient(0deg, rgba(0,0,0,.04) 0 1px, transparent 1px 2px),
    var(--paper);
}

/* Layout */
.wrap {
  width: min(960px, 92vw);
  margin: 40px auto;
  display: grid;
  grid-template-columns: 160px 1fr;
  grid-template-rows: auto auto;
  column-gap: 28px;
  align-items: start;
}

/* Title on the left, stacked like the reference */
h1 {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  margin: 8px 0 0;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1.02;
  letter-spacing: 0.2px;
  font-weight: 800;
}

h1 span { display: block; }

/* Chart canvas */
#pie {
  grid-column: 2 / 3;
  grid-row: 1 / 2;
  display: block;
  width: 100%;
  max-width: 700px;
  height: auto;
  filter: drop-shadow(0 8px 18px rgba(0,0,0,.18));
  background: transparent;
}

/* Legend */
.legend {
  grid-column: 2 / 3;
  grid-row: 2 / 3;
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 8px 16px;
  font-size: 14px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.legend-swatch {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  box-shadow: inset 0 0 0 1px var(--swatch-border);
}

.legend-label {
  color: var(--ink);
}

/* Small helper for accessibility (visual focus outlines) */
:focus-visible {
  outline: 3px solid #2a84b6;
  outline-offset: 2px;
}

.legend-input {
  width: 84px;
  padding: 4px 6px;
  font-size: 13px;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  color: inherit;
  background: var(--input-bg);
}

.legend-input::-webkit-outer-spin-button,
.legend-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.legend-input[type="number"] {
  -moz-appearance: textfield;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e1216;
    --ink: #e9eef2;
    --muted: rgba(233,238,242,.65);
    --muted-weak: rgba(233,238,242,.45);
    --input-bg: #151a1f;
    --input-border: rgba(255,255,255,.25);
    --swatch-border: rgba(255,255,255,.18);
  }

  body {
    color: var(--ink);
    background:
      radial-gradient(circle at 20% 10%, rgba(255,255,255,.04), transparent 50%),
      radial-gradient(circle at 80% 90%, rgba(255,255,255,.05), transparent 50%),
      repeating-linear-gradient(0deg, rgba(255,255,255,.04) 0 1px, transparent 1px 2px),
      var(--paper);
  }
}

.legend-percent {
  color: var(--muted);
  margin-left: 6px;
  min-width: 2ch;
}

.legend-label {
  flex: 1 1 auto;
}

@media (max-width: 820px) {
  .wrap {
    width: min(700px, 92vw);
    margin: 24px auto;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    column-gap: 0;
    row-gap: 16px;
  }

  h1 {
    grid-column: 1 / -1;
    grid-row: auto;
    margin-top: 0;
    text-align: center;
  }

  #pie {
    grid-column: 1 / -1;
    grid-row: auto;
    justify-self: center;
  }

  .legend {
    grid-column: 1 / -1;
    grid-row: auto;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  }
}

/* Adapt built-in form controls to the system theme */
:root { color-scheme: light; }
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; }
}