/* 英语音标专题：44 音素卡，浅绿英语系配色；点卡上的喇叭/例词即发音。 */

.ph-board { min-width: 0; }
.ph-group { margin-bottom: 34px; scroll-margin-top: 24px; }
.ph-group[hidden] { display: none !important; }

.ph-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); align-items: stretch; gap: 16px; }

.ph-theory-card {
  display: flex; flex-direction: column; gap: 12px; min-width: 0; scroll-margin-top: 24px;
  padding: 18px; border: 1px solid var(--line); border-radius: 18px; background: var(--white);
}
.ph-theory-card h3 { margin: 0; font-size: 21px; }
.ph-theory-card p { margin: 0; line-height: 1.7; }
.ph-theory-card .ph-examples { margin-top: 0; }
.ph-theory-sounds { display: flex; flex-wrap: wrap; gap: 8px; }
.ph-theory-sounds button {
  min-height: 44px; min-width: 44px; padding: 5px 12px; border: 1px solid var(--line);
  border-radius: 10px; color: var(--green); background: var(--soft); font: inherit;
  font-size: 21px; font-weight: 750; cursor: pointer;
}
.ph-theory-sounds button:hover { border-color: var(--green); }
.ph-theory-card .ph-theory-practice {
  margin-top: auto; padding: 9px 11px; border-radius: 10px; background: var(--soft); font-size: 16px;
}
.ph-theory-sources { margin-top: 16px; font-size: 15px; }
.ph-theory-sources summary { cursor: pointer; }
.ph-theory-sources a { color: var(--green); text-decoration: underline; }

.ph-card { display: flex; flex-direction: column; min-width: 0; padding: 16px 18px; border: 1px solid #e0e7e0; border-top: 4px solid color-mix(in srgb, var(--c, #2f9e5f) 55%, #fffefa); border-radius: 18px; background: var(--white, #fff); box-shadow: 0 3px 0 #233e3704; transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease; }
.ph-card:hover, .ph-card:focus-within { transform: translateY(-3px); border-color: #cfe0c2; box-shadow: 0 8px 18px #233e3710; }

/* 大音标 + 试听键：点大音标或喇叭都播放音素原声 */
.ph-symbol { display: flex; align-items: center; gap: 12px; }
.ph-symbol-text { min-width: 0; padding: 0; border: 0; background: none; font-size: 40px; font-weight: 900; letter-spacing: 1px; color: #234b38; overflow-wrap: anywhere; cursor: pointer; }
.ph-symbol-text:hover { color: var(--green, #22634c); }
.ph-hear { display: grid; place-items: center; flex: 0 0 44px; width: 44px; height: 44px; margin-left: auto; padding: 0; border: 0; border-radius: 12px; background: #e7f2e2; font-size: 20px; cursor: pointer; }
.ph-hear:active { transform: translateY(1px); }

/* 发音要领与拼读 */
.ph-tip { margin: 10px 0 0; color: #4d5c54; font-size: 15px; line-height: 1.75; }
.ph-spell { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin: 10px 0 0; color: var(--muted, #586b62); font-size: 14px; }
.ph-spell code { padding: 2px 8px; border: 1px solid #d9e4d4; border-radius: 8px; background: #f4f9f1; color: #2f6d4f; font-size: 14px; }

/* 例词 chips */
.ph-examples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.ph-word { display: inline-flex; flex-direction: column; align-items: flex-start; gap: 1px; max-width: 100%; min-height: 44px; padding: 7px 11px; border: 1px solid #d9e1cf; border-radius: 11px; background: #f9fbf5; color: var(--ink, #233e37); overflow-wrap: anywhere; text-align: left; cursor: pointer; }
.ph-word:hover { border-color: #a8c28c; background: #eff5e5; }
.ph-word b { font-size: 17px; font-weight: 750; }
.ph-word i { font-style: normal; font-size: 14px; color: #68608d; }
.ph-word i + i { color: var(--muted, #586b62); }
.ph-word em { font-style: normal; padding: 1px 6px; margin-top: 2px; border-radius: 6px; background: #f0e4c3; color: #655638; font-size: 12px; font-weight: 700; }
.ph-word.extended { border-style: dashed; background: #fffdf4; }
.ph-word.extended b { color: #655638; }

/* 分组强调色 */
.ph-group-short .ph-card { --c: #f15bb5; }
.ph-group-long .ph-card { --c: #4d96ff; }
.ph-group-diphthong .ph-card { --c: #9b5de5; }
.ph-group-paired .ph-card { --c: #d9822b; }
.ph-group-other .ph-card { --c: #2f9e5f; }
.ph-group .button.small { border: 1px solid var(--green, #22634c); }

/* 侧栏 emoji 点：不用共享色点圆片，按文字尺寸渲染 */
.unit-nav .unit-dot { width: auto; height: auto; background: none; }
/* 侧栏分组导航压缩一档（同 idioms/words 侧栏处理） */
.library-layout .unit-nav { padding: 18px 14px; }
.library-layout .unit-nav h2 { margin-bottom: 10px; font-size: 1.05rem; }
.library-layout .unit-nav a { min-height: 40px; padding: 7px 11px; margin-block: 3px; border-radius: 10px; font-size: .84rem; }
.library-layout .unit-nav .unit-count { font-size: 12px; }
.library-layout .unit-nav .unit-dot { margin-right: 6px; font-size: .92em; }

@media (min-width: 1480px) {
  #group-theory .ph-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .ph-grid { grid-template-columns: minmax(0, 1fr); }
  .ph-symbol-text { font-size: 34px; }
  .ph-card { padding: 14px 15px; }
}
@media print {
  .unit-nav, .tts-bar, .tts-settings, .ph-hear, .section-heading .button { display: none !important; }
  .ph-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ph-card, .ph-theory-card { break-inside: avoid; box-shadow: none; }
}