/* Aizome: indigo-dyed cloth on white. Colors from traditional Japanese dye names. */
:root {
  --paper: #ffffff;       /* page and table */
  --ai: #165e83;          /* 藍色 indigo */
  --kamenozoki: #a2d7dd;  /* 瓶覗 palest indigo */
  --aitetsu: #393f4c;     /* 藍鉄 indigo-iron ink */
  --namari: #7b7c7d;      /* 鉛色 lead gray */
  --akane: #b7282e;       /* 茜 madder */
  --rule: #e2e2e2;
  --mincho: 'Zen Old Mincho', 'Hiragino Mincho ProN', Georgia, serif;
  --gothic: 'Zen Kaku Gothic New', 'Hiragino Sans', system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--aitetsu);
  font: 15px/1.6 var(--gothic);
}

:focus-visible { outline: 2px solid var(--ai); outline-offset: 2px; }

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  min-height: 100svh;
}

.viewport { position: relative; min-height: 70svh; display: grid; }
.pane { position: relative; min-height: 0; }
.pane-solver { display: none; }
.viewport.compare { grid-template-columns: 1fr 1fr; }
.viewport.compare .pane-solver { display: block; }
.tag { display: none; position: absolute; top: 16px; left: 20px; font: 600 0.95rem var(--mincho); }
.viewport.compare .tag { display: block; }
.clip-error { margin: 10px 0 0; font-size: 0.9rem; font-variant-numeric: tabular-nums; }

canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
  touch-action: none;
}

canvas.grabbing { cursor: grabbing; }

.status {
  position: absolute;
  inset: 45% 0 auto;
  margin: 0;
  text-align: center;
  color: var(--namari);
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding: 40px 32px 32px 8px;
}

h1 {
  margin: 0;
  font: 600 2.6rem/1.05 var(--mincho);
  letter-spacing: 0.01em;
  color: var(--ai);
}

.lede { margin: 14px 0 0; }

h2 {
  margin: 0 0 10px;
  font: 600 1.05rem/1.2 var(--mincho);
}

button {
  font: inherit;
  font-size: 0.92rem;
  color: var(--aitetsu);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 5px 13px;
  cursor: pointer;
}

button:hover { border-color: var(--ai); }

button[aria-pressed='true'] {
  background: var(--ai);
  border-color: var(--ai);
  color: var(--paper);
}

.scenes { display: flex; flex-wrap: wrap; gap: 6px; }

.hint { margin: 12px 0 0; font-size: 0.9rem; color: #5d6371; }

.sliders label {
  display: grid;
  grid-template-columns: 1fr auto;
  row-gap: 2px;
  margin-bottom: 12px;
  font-size: 0.92rem;
}

.sliders output { color: #5d6371; font-variant-numeric: tabular-nums; }

input[type='range'] {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--ai);
}

.run { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.keys { font-size: 0.82rem; color: #6d7280; }

.readout {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 4px;
  font-size: 0.9rem;
}

.readout div { display: flex; justify-content: space-between; }
.readout dt { color: #5d6371; }
.readout dd { margin: 0; font-variant-numeric: tabular-nums; }

.notes {
  max-width: 44rem;
  margin: 0 0 0 max(24px, calc((100vw - 320px) / 2 - 22rem));
  padding: 56px 0 72px;
  border-top: 1px solid var(--rule);
  font: 16px/1.75 var(--mincho);
}

.notes h2 { font-size: 1.5rem; color: var(--ai); margin-bottom: 18px; }
.notes p { margin: 0 0 16px; }
.notes strong { font-weight: 600; color: var(--ai); }

.compare-table {
  width: 100%;
  margin-top: 28px;
  border-collapse: collapse;
  font: 0.92rem/1.5 var(--gothic);
}

.compare-table caption { text-align: left; font: 600 1rem var(--mincho); margin-bottom: 8px; }
.compare-table th, .compare-table td { text-align: left; vertical-align: top; padding: 8px 12px 8px 0; border-top: 1px solid var(--rule); }
.compare-table thead th { color: #5d6371; font-weight: 500; border-top: 0; }
.compare-table tbody th { font-weight: 500; white-space: nowrap; }
.compare-table td { font-variant-numeric: tabular-nums; }

@media (max-width: 860px) {
  .notes { margin: 0 16px; padding: 40px 0 56px; }
  .compare-table tbody th { white-space: normal; }
  .stage { grid-template-columns: 1fr; }
  .viewport { height: 72svh; min-height: 0; order: 2; }
  .panel { display: contents; }
  .panel > header { order: 1; padding: 24px 16px 8px; }
  .panel > .group, .panel > .readout { order: 3; margin: 0 16px 18px; }
  h1 { font-size: 2.1rem; }
  .keys { display: none; }
}