/* 練習頁專用樣式 */
.app-body { background: var(--cloud); min-height: 100vh; }
.app { max-width: 880px; margin: 0 auto; padding: 32px 18px 80px; }
.btn--sm { padding: 9px 16px; font-size: 14px; }

.picker { animation: fade .4s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; } }

/* 舞台 */
.stage { animation: fade .3s ease; }
.stage__bar {
  display: flex; align-items: center; gap: 14px; margin-bottom: 18px; flex-wrap: wrap;
}
.stage__title { font-weight: 800; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.stage__title span:first-child { font-size: 24px; }
.dots { margin-left: auto; display: flex; gap: 7px; }
.dot { width: 11px; height: 11px; border-radius: 50%; background: var(--line); transition: background .3s, transform .3s; }
.dot.active { background: var(--indigo); transform: scale(1.25); }
.dot.done { background: var(--mint); }

.scene-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); overflow: hidden; margin-bottom: 18px;
}
.scene-context {
  padding: 18px 22px; background: linear-gradient(135deg, var(--ink), var(--ink-2));
  color: #e7e9ff; font-size: 15px; line-height: 1.6;
}
.chat-log { padding: 20px 22px; display: flex; flex-direction: column; gap: 12px; min-height: 180px; max-height: 52vh; overflow-y: auto; }

/* 對話泡泡 */
.msg { max-width: 82%; padding: 12px 16px; border-radius: 16px; font-size: 15px; line-height: 1.55; animation: pop .25s ease; }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(.98); } to { opacity: 1; transform: none; } }
.msg small { display: block; font-size: 11px; font-weight: 800; letter-spacing: .06em; opacity: .7; margin-bottom: 4px; }
.msg--npc { background: var(--cloud-2); color: var(--ink); align-self: flex-start; border-bottom-left-radius: 5px; }
.msg--task { background: #fff5e6; border: 1px solid #ffe0ad; color: #7a4e00; align-self: flex-start; }
.msg--zh { background: linear-gradient(135deg, var(--amber), var(--coral)); color: #fff; align-self: flex-end; border-bottom-right-radius: 5px; }
.msg--coach { background: #eef0ff; border: 1px solid #d7dbff; color: var(--ink); align-self: flex-start; }
.msg--me { background: linear-gradient(135deg, var(--indigo), var(--violet)); color: #fff; align-self: flex-end; border-bottom-right-radius: 5px; }
.msg--sys { background: transparent; color: var(--muted); align-self: center; font-size: 13px; text-align: center; max-width: 100%; }

/* 教練卡內的模範句與拆解 */
.model-line { display: flex; align-items: center; gap: 10px; margin: 8px 0 4px; }
.model-en { font-weight: 800; font-size: 17px; }
.speak-btn {
  border: 0; background: rgba(58,70,224,.12); color: var(--indigo); cursor: pointer;
  width: 34px; height: 34px; border-radius: 10px; font-size: 16px; flex-shrink: 0;
}
.speak-btn:hover { background: rgba(58,70,224,.22); }
.breakdown { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.chiplet { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 3px 9px; font-size: 13px; }
.chiplet b { color: var(--indigo); }
.coach-tip { margin-top: 8px; font-size: 13px; color: var(--muted); border-left: 3px solid var(--amber); padding-left: 10px; }
.source-badge { font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: rgba(25,195,125,.14); color: #0b7a4d; }
.source-badge.ai { background: rgba(139,92,246,.16); color: #6b33d6; }

/* 輸入列 */
.inputbar { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 16px; box-shadow: var(--shadow); }
.inputbar__row { display: flex; gap: 10px; }
.inputbar__row input { flex: 1; padding: 13px 15px; border: 1.5px solid var(--line); border-radius: 12px; font: inherit; font-size: 15px; background: var(--cloud); }
.inputbar__row input:focus { outline: 0; border-color: var(--indigo-2); background: #fff; }
.inputbar__aux { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.iconbtn { width: 48px; border: 1.5px solid var(--line); border-radius: 12px; background: var(--cloud); font-size: 20px; cursor: pointer; transition: all .15s; }
.iconbtn:hover { border-color: var(--indigo-2); }
.iconbtn.rec { background: var(--coral); border-color: var(--coral); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(255,107,92,.5); } 50% { box-shadow: 0 0 0 10px rgba(255,107,92,0); } }
.chip { border: 1.5px solid var(--line); background: #fff; border-radius: 999px; padding: 9px 16px; font: inherit; font-weight: 700; font-size: 14px; cursor: pointer; transition: all .15s; }
.chip:hover { border-color: var(--indigo-2); }
.chip--stuck { background: #fff5e6; border-color: #ffe0ad; color: #7a4e00; }
.chip--stuck:hover { background: #ffe9c7; }
.zh-panel { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--line); }
.zh-panel label { display: block; font-weight: 700; font-size: 14px; margin-bottom: 8px; }

/* 過關 */
.finish { animation: fade .4s ease; }
.finish__card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 48px 32px; text-align: center; box-shadow: var(--shadow); max-width: 520px; margin: 40px auto; }
.finish__emoji { font-size: 64px; }
.finish__stars { font-size: 40px; letter-spacing: 6px; margin: 10px 0; }
.finish__btns { display: flex; gap: 12px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: #fff; padding: 12px 20px; border-radius: 12px; font-weight: 600;
  opacity: 0; pointer-events: none; transition: all .3s; z-index: 100; box-shadow: var(--shadow-lg);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.ok { background: #0b7a4d; }
.toast.err { background: #c0392b; }