/* style.css */
* {
  touch-action: manipulation;
  box-sizing: border-box; /* ついでに入れておくとレイアウト崩れを防げて便利です */
}

body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  background-color: #1a1a1a;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
#game-container {
  background: #2d2d2d;
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  width: 100%;
  max-width: 650px;
  text-align: center;
  border: 2px solid #444;
  position: relative;
}
h1 {
  color: #f1c40f;
  font-size: 26px;
  margin-bottom: 5px;
}

/* ステータスエリア */
#stats {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  font-weight: bold;
  font-size: 18px;
  background: #222;
  padding: 10px 20px;
  border-radius: 8px 8px 0 0;
  align-items: center;
}
#timer {
  color: #2ecc71;
}
.danger-time {
  color: #e74c3c !important;
  animation: pulse 0.5s infinite alternate;
}
@keyframes pulse {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.05);
  }
}

/* タイムバー */
#progress-container {
  background: #444;
  height: 8px;
  border-radius: 0 0 8px 8px;
  margin-bottom: 15px;
  overflow: hidden;
  position: relative;
}
#progress-bar {
  background: #2ecc71;
  height: 100%;
  width: 100%;
  transition:
    width 0.2s linear,
    background-color 0.3s;
}
.danger-bar {
  background: #e74c3c !important;
  animation: bar-flash 0.5s infinite alternate;
}
@keyframes bar-flash {
  from {
    opacity: 1;
  }
  to {
    opacity: 0.6;
  }
}

/* ナビゲーター */
#nav-box {
  display: flex;
  justify-content: space-around;
  margin-bottom: 10px;
  font-size: 16px;
  font-weight: bold;
  align-items: center;
}
.nav-slot {
  background: #444;
  padding: 8px 10px;
  border-radius: 4px;
  width: 45%;
  border: 1px dashed #666;
  box-sizing: border-box;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.nav-active {
  border-color: #f1c40f;
  color: #f1c40f;
  background: #3a341c;
}
.nav-filled {
  background: #1e3d23;
  color: #2ecc71;
  border-style: solid;
}

#question-box {
  background: #3d3d3d;
  padding: 5px 10px;
  min-height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: bold;
  margin-bottom: 15px;
  line-height: 1.5;
  border-left: 5px solid #f1c40f;
}

/* 選択肢ボタン */
.btn-container {
  display: grid;
  /* 4列(repeat(4, 1fr)) ではなく、2列(repeat(2, 1fr)) に変更 */
  grid-template-columns: repeat(2, 1fr);
  gap: 15px; /* 2列だと余裕ができるので、隙間を広げるとより押しやすくなります */

  max-width: 500px; /* 2列ならこのくらいの幅が一番指に馴染みます */
  margin: 0 auto;
}

/* 1. 通常のボタンの見た目 */
.btn-container button {
  font-size: 16px !important;
  padding: 10px;
  word-break: keep-all;
  white-space: nowrap;

  /* 追加したい操作感の設定 */
  border-radius: 6px;
  transition: opacity 0.2s;
}

/* 2. 押したときだけのアクション（これだけでひとつのルール） */
.btn-container button:active {
  opacity: 0.7;
}

.opt-btn {
  background: #34495e;
  color: white;
  border: 1px solid #555;
  padding: 16px 2px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.1s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.opt-btn:hover {
  background: #4e6a85;
  border-color: #f1c40f;
}
.opt-btn:active {
  transform: scale(0.95);
}

.action-area {
  display: flex;
  justify-content: flex-end; /* ここを調整してもOK */
  width: 100%; /* ここも必要に応じて変更OK */
  max-width: 500px; /* ここを追加するのもOK */
  margin: 10px auto 0; /* これも丸ごと入れ替えてOK */
}
.clear-btn {
  background: #e67e22;
  color: white;
  border: none;
  padding: 6px 16px;
  border-radius: 4px;
  font-size: 13px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.1s;
}
.clear-btn:hover {
  background: #d35400;
}
.visibility-hidden {
  visibility: hidden;
}

.quit-btn {
  background: #7f8c8d;
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  font-weight: bold;
}
.quit-btn:hover {
  background: #c0392b;
}

#start-screen {
  text-align: center;
  padding: 15px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.start-btn {
  background: #2ecc71;
  color: white;
  border: none;
  padding: 14px 50px;
  border-radius: 8px;
  font-size: 22px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(46, 204, 113, 0.4);
  margin-bottom: 15px;
  width: fit-content;
}
.start-btn:hover {
  background: #27ae60;
}

/* 設定ボタンスタイル */
.settings-toggle-btn {
  background: #444;
  color: #ccc;
  border: 1px solid #555;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  margin-bottom: 10px;
  transition: all 0.2s;
}
.settings-toggle-btn:hover {
  background: #555;
  color: #fff;
}

/* 設定グループ */
.settings-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  margin-top: 5px;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease-out;
  width: 100%;
}
.settings-group.open {
  max-height: 200px;
}

.setting-box {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 10px;
  background: #222;
  padding: 8px 14px;
  border-radius: 6px;
  width: 290px;
  border: 1px solid #444;
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  box-sizing: border-box;
}
.setting-box input[type="checkbox"] {
  cursor: pointer;
  margin: 0;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.setting-box select {
  background: #333;
  color: #fff;
  border: 1px solid #555;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: bold;
  font-size: 13px;
  cursor: pointer;
  margin-left: auto;
}
.time-label {
  font-weight: bold;
}

/* 過去の履歴表示 */
.history-title {
  font-size: 14px;
  font-weight: bold;
  color: #f1c40f;
  margin: 20px 0 6px 0;
  text-align: left;
  width: 290px;
  border-bottom: 1px solid #444;
  padding-bottom: 4px;
}
.history-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 290px;
  font-size: 13px;
  text-align: left;
  color: #ccc;
}
.history-item {
  background: #222;
  padding: 8px 14px;
  border-radius: 4px;
  display: flex;
  justify-content: space-between;
  border-left: 3px solid #2ecc71;
}
.history-empty {
  text-align: center;
  color: #666;
  font-style: italic;
  padding: 10px;
}

.hide {
  display: none !important;
}
.flash-correct {
  background-color: #1e3d23 !important;
  transition: background 0s;
}
.flash-wrong {
  background-color: #3d1e1e !important;
  transition: background 0s;
}

/* 結果画面のスタイルを追加 */
#result-screen {
  background: #2d2d2d;
  padding: 30px;
  border-radius: 16px;
  border: 2px solid #444;
  text-align: center;
  color: white;
}

/* --- 2. 画面幅が520px以上のときだけ上書き（4列にする） --- */
@media (min-width: 520px) {
  .btn-container {
    grid-template-columns: repeat(4, 1fr); /* 520px以上なら4列に変化 */
  }
}