/* 拼音冒险首版样式：沿用数字花园视觉方向（暖纸色、奶油卡、清晰对比），
   以湖蓝青色表达字母与声音主题；独立命名空间，不复用其他游戏的选择器行为。
   候选字母用大号清晰字体，区分易混字形（b/d/p/q、n/u 等），不做装饰性变形。 */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: #f4f1e6;
  color: #2d3a3a;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  min-height: 100dvh;
}
.app {
  max-width: 520px;
  margin: 0 auto;
  padding: calc(env(safe-area-inset-top, 0px) + 12px) 14px calc(env(safe-area-inset-bottom, 0px) + 24px);
}
.app-title { font-size: 30px; margin: 4px 0 14px; letter-spacing: 1px; }
.app-title-dot { color: #2d7a8c; }
.screen { display: block; }
.screen[hidden] { display: none; }
.card {
  background: #fbf8ee;
  border: 1px solid #d6d9c8;
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 14px;
}
.card h2 { margin: 2px 0 10px; font-size: 20px; }
.hint { color: #68766f; font-size: 14px; margin: 4px 0 10px; }
.profile-bar {
  background: #fbf8ee; border: 1px solid #d6d9c8; border-radius: 999px;
  padding: 10px 16px; margin-bottom: 12px; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
/* 锚点没有按钮默认样式，去下划线即可复用 .btn-ghost 外观；跨页返回数字消除首页。 */
a.btn-ghost { text-decoration: none; }
.storage-notice { font-size: 13px; color: #a05a2c; margin: 8px 0; }
.grade-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 8px 0 14px; }
.grade-card {
  border: 2px solid #d6d9c8; border-radius: 12px; background: #fff;
  padding: 12px 6px; text-align: center; font-size: 15px; cursor: pointer;
}
.grade-card[aria-pressed="true"] { border-color: #2d7a8c; background: #e3f1f2; font-weight: 700; }
.grade-card:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary {
  display: block; width: 100%; border: 0; border-radius: 12px;
  background: #2d7a8c; color: #fff; font-size: 17px; font-weight: 700;
  padding: 14px; cursor: pointer;
}
.btn-primary:disabled { background: #a3c4ca; cursor: not-allowed; }
.btn-ghost {
  border: 2px solid #2d7a8c; background: transparent; color: #23606d;
  border-radius: 12px; font-size: 15px; font-weight: 600; padding: 10px 14px; cursor: pointer;
}
.availability { font-size: 14px; color: #23606d; min-height: 18px; margin: 10px 0 0; }
.restore { border-color: #2d7a8c; }
.restore-actions { display: flex; gap: 10px; }
.restore-actions .btn-primary, .restore-actions .btn-ghost { flex: 1; }
.records { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.records li { padding: 8px 2px; border-bottom: 1px dashed #d6d9c8; }
.records li:last-child { border-bottom: 0; }
/* 局内 */
.game-hud { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.hud-progress { font-weight: 700; }
.hud-score { flex: 1; text-align: right; font-weight: 700; color: #23606d; }
.q-title { font-size: 18px; margin: 0 0 4px; color: #23606d; }
.q-title:focus { outline: 2px solid #2d7a8c; outline-offset: 2px; border-radius: 4px; }
.countdown { text-align: right; font-size: 14px; font-weight: 600; color: #68766f; margin: 0 0 4px; }
.countdown[data-urgent="true"] { color: #b03a2e; }
.q-prompt { font-size: 34px; font-weight: 700; margin: 8px 0 12px; text-align: center; letter-spacing: 2px; }
/* 听辨播放区：可重复播放；音频不可用提示明确，不假装完成听力训练。 */
.play-group { text-align: center; margin: 4px 0 12px; }
.play-group[hidden] { display: none; }
.btn-play {
  border: 2px solid #2d7a8c; background: #e3f1f2; color: #23606d;
  border-radius: 999px; font-size: 18px; font-weight: 700;
  padding: 14px 30px; cursor: pointer; min-height: 52px; font-family: inherit;
}
.btn-play:disabled { opacity: .55; cursor: not-allowed; }
.audio-notice {
  font-size: 14px; color: #7a5a22; background: #fdf6e4;
  border: 1px solid #c9a53c; border-radius: 10px; padding: 8px 10px; margin: 10px 0 0;
}
.audio-notice[hidden] { display: none; }
.options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.option-card {
  border: 2px solid #d6d9c8; border-radius: 14px; background: #fff;
  font-size: 34px; font-weight: 700; padding: 16px 6px; cursor: pointer;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  min-height: 72px; color: #2d3a3a; letter-spacing: 1px;
}
.option-card:disabled { opacity: .55; cursor: not-allowed; }
.feedback { text-align: center; font-size: 17px; font-weight: 700; padding: 8px; border-radius: 10px; margin-top: 12px; }
.feedback[data-kind="correct"] { color: #2d7a37; background: #e8f4e4; }
.feedback[data-kind="wrong"] { color: #b03a2e; background: #f9e8e4; }
.feedback[data-kind="info"] { color: #7a5a22; background: #fdf6e4; }
.question-actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.question-actions .btn-primary, .question-actions .btn-ghost { flex: 1 1 40%; }
.question-actions .btn-primary[hidden], .question-actions .btn-ghost[hidden] { display: none; }
/* 结算 */
.result-score { font-size: 34px; font-weight: 800; color: #23606d; margin: 6px 0 10px; }
.result-line { font-size: 14px; line-height: 1.6; margin: 4px 0; color: #2d3a3a; }
.result .restore-actions { margin-top: 14px; }
/* 暂停与确认 */
.pause-overlay {
  position: fixed; inset: 0; background: rgba(45, 58, 58, .45);
  display: flex; align-items: center; justify-content: center;
}
.pause-overlay[hidden] { display: none; }
.pause-card, .confirm-dialog {
  background: #fbf8ee; border-radius: 16px; padding: 22px 26px; text-align: center;
  border: 1px solid #d6d9c8;
}
.pause-card p { font-size: 20px; font-weight: 700; margin: 0 0 14px; }
.confirm-dialog::backdrop { background: rgba(45, 58, 58, .45); }
.confirm-dialog p { margin: 0 0 14px; }
.boot-fail {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: #f4f1e6; color: #b03a2e; font-size: 16px;
}
.boot-fail[hidden] { display: none; }
@media (min-width: 720px) {
  .options { grid-template-columns: repeat(4, 1fr); }
}
@media (max-height: 560px) and (orientation: landscape) {
  .options { grid-template-columns: repeat(4, 1fr); }
}