/* 白黒の画面。色は背景の #e3dcd8 だけに使い、他は黒・白・灰で構成する。
   角丸は使わない。 */
:root {
  color-scheme: light;
  --bg: #e3dcd8;
  --ink: #000000;
  --ink-mute: #6b6b6b;
  --paper: #ffffff;
}

* {
  box-sizing: border-box;
  border-radius: 0;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "DotGothic16", "Courier New", monospace;
  font-size: 15px;
  line-height: 1.8;
  min-height: 100vh;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  grid-template-areas:
    "title title"
    "board panel";
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 28px 20px 40px;
}

.title {
  grid-area: title;
  margin: 0;
  font-size: 1.4rem;
  font-weight: normal;
  letter-spacing: 0.08em;
}

.board-shell {
  grid-area: board;
  min-width: 0;
}

#game-canvas {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  aspect-ratio: 1 / 1;
  border: 2px solid var(--ink);
  background: var(--paper);
  touch-action: manipulation;
}

#game-canvas:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

.panel {
  grid-area: panel;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.panel-block {
  padding: 12px 14px;
  border: 2px solid var(--ink);
  background: var(--paper);
}

.status-phase {
  margin: 0;
  font-size: 1.15rem;
}

.status-message {
  margin: 0;
  min-height: 1.8em;
  color: var(--ink-mute);
  font-size: 0.85rem;
}

/* エラーは色を持たないので、反転と罫線で伝える */
.status-block[data-tone="error"] {
  background: var(--ink);
  color: var(--paper);
}

.status-block[data-tone="error"] .status-message {
  color: var(--paper);
}

.next-color {
  display: flex;
  align-items: center;
  gap: 10px;
}

.swatch {
  flex: none;
  width: 64px;
  height: 64px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
}

.average-scale[hidden] {
  display: none;
}

.average-scale {
  display: flex;
  align-items: center;
  width: 100%;
  height: 64px;
  margin-top: 8px;
}

.average-track {
  position: relative;
  width: calc(100% - 64px);
  height: 24px;
  margin: 0 32px;
  background: linear-gradient(to right, #ffffff, #000000);
  border: 2px solid var(--ink);
}

.average-marker {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 64px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
  transform: translate(-50%, -50%);
}

.meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 12px;
  margin: 10px 0 0;
  font-size: 0.85rem;
}

.meta dt {
  color: var(--ink-mute);
}

.meta dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.8rem;
  color: var(--ink-mute);
}

.control[hidden] {
  display: none;
}

.control select {
  padding: 6px 8px;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 0.9rem;
}

.action {
  padding: 8px 12px;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}

.action:hover:not(:disabled) {
  background: var(--ink);
  color: var(--paper);
}

.action:disabled {
  border-color: var(--ink-mute);
  color: var(--ink-mute);
  cursor: not-allowed;
}

.control select:focus-visible,
.action:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 2px;
}

.result-popup[hidden] {
  display: none;
}

.result-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 10;
  width: min(560px, calc(100vw - 28px));
  padding: 28px 24px;
  transform: translate(-50%, -50%);
  border: 3px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 8px 8px 0 var(--ink);
  text-align: center;
  pointer-events: none;
}

.result-popup-message {
  margin: 0;
  font-size: clamp(1.1rem, 4vw, 1.8rem);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "title"
      "board"
      "panel";
  }
}

@media (max-width: 640px) {
  .layout {
    padding: 18px 14px 32px;
    gap: 14px;
  }

  .title {
    font-size: 1.15rem;
  }

  .status-phase {
    font-size: 1rem;
  }

  .result-popup {
    padding: 22px 16px;
    box-shadow: 5px 5px 0 var(--ink);
  }
}