body {
  background-color: #f8f8f8;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  margin: 0;
  font-family: sans-serif;
  overflow: hidden;
  padding: 10px;
  box-sizing: border-box;
  transition: background-color 0.8s ease, color 0.8s ease;
}

body.dark {
  background-color: #222;
  color: #fff;
}

/* 時計コンテナ */
#clock-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 90vw;
  text-align: center;
}

#realtime {
  font-size: min(40vh, 20vw);
  color: #333;
  font-weight: bold;
  user-select: none;
  line-height: 1;
  margin: 0;
  white-space: nowrap;
}

body.dark #realtime {
  color: #fff;
}

#info-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  width: 100%;
  margin-top: 1vh;
  padding: 0 2vw;
  box-sizing: border-box;
}

#date-display,
#ampm-display {
  font-size: min(6vh, 3vw);
  color: #666;
  white-space: nowrap;
  margin: 0;
  line-height: 1;
}

body.dark #date-display,
body.dark #ampm-display {
  color: #fff;
}

/* アナログ時計 */
#analog-canvas {
  display: none;
  width: min(80vw, 80vh);
  height: min(80vw, 80vh);
  max-width: 600px;
  max-height: 600px;
}

/* コントロールパネル */
#controls {
  margin-top: 2vh;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

/* フォント選択を非表示にするクラス */
#font-wrapper.hidden {
  display: none;
}

/* スマホ対応 */
@media (max-width: 768px) {
  #realtime {
    font-size: min(25vh, 40vw);
  }
  #info-bottom {
    margin-top: 0.5vh;
    padding: 0 1vw;
  }
  #ampm-display {
    font-size: min(4vh, 6vw);
  }
}