*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #e8e4d8;
  font-family: 'Noto Serif JP', '游明朝', 'Hiragino Mincho ProN', Georgia, serif;
  color: #1a1a1a;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 28px 12px 40px;
}

#container {
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

h1 {
  font-size: 1.25rem;
  font-weight: normal;
  letter-spacing: 0.25em;
  color: #1a1a1a;
  margin-bottom: 4px;
}

#phase-label {
  font-size: 0.75rem;
  color: #999;
  letter-spacing: 0.12em;
  min-height: 1.1em;
}

#move-display {
  font-size: 1rem;
  letter-spacing: 0.06em;
  min-height: 1.6em;
  color: #1a1a1a;
}

#event-label {
  font-size: 0.78rem;
  color: #aaa;
  letter-spacing: 0.1em;
  min-height: 1.1em;
}

#board-wrap {
  width: 100%;
}

#board {
  width: 100%;
  height: auto;
  display: block;
}

#controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 4px;
}

#controls button {
  background: none;
  border: 1px solid #bbb;
  color: #666;
  padding: 6px 20px;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: border-color 0.15s, color 0.15s;
}

#controls button:hover:not(:disabled) {
  border-color: #1a1a1a;
  color: #1a1a1a;
}

#controls button:disabled {
  opacity: 0.25;
  cursor: default;
}

#step-label {
  font-size: 0.8rem;
  color: #aaa;
  min-width: 44px;
  text-align: center;
  letter-spacing: 0.04em;
}