:root {
  --bg: #f6f5f1;
  --fg: #1d1d1b;
  --muted: #6b6a65;
  --panel: #ffffff;
  --line: #dddbd3;
  --accent: #1f6feb;
  --guess: #1f6feb;
  --answer: #d1242f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141413;
    --fg: #ecebe6;
    --muted: #a3a29b;
    --panel: #1e1e1c;
    --line: #34332f;
    --accent: #58a6ff;
    --guess: #58a6ff;
    --answer: #ff7b72;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.6;
}

.top, main, .foot {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 16px;
}

.top { padding-top: 20px; }
h1 { font-size: 1.4rem; margin: 0; }
h2 { font-size: 1.1rem; margin: 0 0 8px; }
.meta { color: var(--muted); font-size: 0.85rem; margin: 4px 0 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-top: 16px;
}

.progress { font-weight: 600; margin: 16px 0 8px; }
.hint { margin: 8px 0; font-size: 0.9rem; color: var(--muted); }

.shot { margin: 0; }
.shot img, .board img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.question { font-size: 1.15rem; font-weight: 600; margin: 4px 0 8px; }
.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 1px 8px;
  margin-left: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
}

.zoom { display: flex; gap: 6px; margin: 4px 0 8px; }
.zoom button {
  flex: 1;
  padding: 8px 0;
  font-size: 0.85rem;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}
.zoom button[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); font-weight: 600; }

.viewport {
  overflow-x: auto;
  overflow-y: hidden;
  border-radius: 10px;
  border: 1px solid var(--line);
}
.viewport .board img { border: 0; border-radius: 0; }
/* 縦横比を決めた盤面では、画像を盤面いっぱいに広げる。押した位置と地図の座標を一致させるため。 */
.board.fixed img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.board {
  position: relative;
  background: var(--line);
  cursor: crosshair;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.pin {
  position: absolute;
  width: 18px;
  height: 18px;
  margin: -9px 0 0 -9px;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}
.pin.guess { background: var(--guess); }
.pin.answer { background: var(--answer); }

.feedback { min-height: 1.6em; font-weight: 600; margin: 8px 0; }

button.primary {
  width: 100%;
  padding: 14px;
  margin: 4px 0 8px;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 10px;
  cursor: pointer;
}
button.primary:disabled { opacity: 0.4; cursor: default; }

.total { font-size: 2rem; font-weight: 700; margin: 0; }
.share-text {
  white-space: pre-wrap;
  word-break: break-all;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  font-size: 0.95rem;
}

.foot { padding: 32px 16px; color: var(--muted); font-size: 0.75rem; }