* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #0f1115;
  --card: #1a1f29;
  --card2: #232a37;
  --text: #f2f4f8;
  --muted: #8b94a7;
  --accent: #ff7a1a;
  --accent-dim: #b35512;
  --green: #2ecc71;
  --red: #e5484d;
  --radius: 16px;
}

html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

#app { max-width: 480px; margin: 0 auto; min-height: 100%; padding: 16px 16px calc(24px + env(safe-area-inset-bottom)); }

.screen { display: none; }
.screen.active { display: block; }

h1 { font-size: 24px; }
h2 { font-size: 20px; }
.muted { color: var(--muted); font-size: 14px; }
.center-box { text-align: center; padding-top: 25vh; }
.big-emoji { font-size: 72px; line-height: 1.2; }

/* —— 首页 —— */
.home-header { display: flex; align-items: center; justify-content: space-between; margin: 8px 0 20px; }
.streak-chip {
  background: var(--card); border-radius: 999px; padding: 8px 14px;
  font-weight: 700; font-size: 16px;
}
.streak-chip.hot { background: #3a2210; color: var(--accent); }

.day-card {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); border-radius: var(--radius);
  padding: 16px; margin-bottom: 12px; border: none; width: 100%;
  color: var(--text); text-align: left; font-size: 16px; cursor: pointer;
}
.day-card:active { background: var(--card2); }
.day-card .day-num { font-size: 28px; width: 44px; text-align: center; flex-shrink: 0; }
.day-card .day-info { flex: 1; }
.day-card .day-title { font-weight: 700; font-size: 17px; }
.day-card .day-sub { color: var(--muted); font-size: 13px; }
.day-card.locked { opacity: 0.4; }
.day-card.today { outline: 2px solid var(--accent); }

.btn {
  display: block; width: 100%; border: none; border-radius: var(--radius);
  background: var(--accent); color: #17110a; font-size: 18px; font-weight: 800;
  padding: 16px; margin-top: 12px; cursor: pointer;
}
.btn:active { background: var(--accent-dim); }
.btn.secondary { background: var(--card); color: var(--text); font-weight: 600; }
.btn.ghost { background: none; color: var(--muted); font-weight: 500; font-size: 15px; padding: 10px; }
.btn:disabled { opacity: 0.4; }

/* —— 学习流程 —— */
.session-top { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.icon-btn {
  background: var(--card); color: var(--muted); border: none;
  width: 36px; height: 36px; border-radius: 50%; font-size: 16px; cursor: pointer; flex-shrink: 0;
}
.progress { flex: 1; height: 8px; background: var(--card); border-radius: 4px; overflow: hidden; }
#progress-fill { height: 100%; width: 0%; background: var(--accent); border-radius: 4px; transition: width .3s; }

.step-label { color: var(--muted); font-size: 14px; margin-bottom: 12px; text-align: center; }

.teach-card {
  background: var(--card); border-radius: var(--radius);
  padding: 36px 20px; text-align: center;
}
.teach-card .emoji { font-size: 88px; line-height: 1.1; }
.teach-card .en { font-size: 34px; font-weight: 800; margin-top: 10px; letter-spacing: 0.5px; }
.teach-card .zh { font-size: 18px; color: var(--muted); margin-top: 4px; }

.play-btn {
  background: var(--card2); color: var(--text); border: none; border-radius: 999px;
  padding: 12px 22px; font-size: 17px; font-weight: 700; margin: 16px 6px 0; cursor: pointer;
}
.play-btn:active { background: #2d3648; }

.drill-lines { background: var(--card); border-radius: var(--radius); padding: 16px 20px; margin-top: 14px; }
.drill-lines div { padding: 5px 0; font-size: 17px; font-weight: 600; color: var(--muted); }
.drill-hint { text-align: center; font-size: 15px; color: var(--muted); margin-top: 12px; }

.quiz-opts { display: grid; gap: 12px; margin-top: 16px; }
.opt {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); border: 2px solid transparent; border-radius: var(--radius);
  padding: 14px 16px; font-size: 19px; font-weight: 700; color: var(--text);
  cursor: pointer; text-align: left;
}
.opt .opt-emoji { font-size: 30px; }
.opt.correct { border-color: var(--green); background: #14301f; }
.opt.wrong { border-color: var(--red); background: #331418; animation: shake .3s; }
@keyframes shake { 25% { transform: translateX(-6px); } 75% { transform: translateX(6px); } }

/* —— 跟读录音 —— */
.rec-area { text-align: center; margin-top: 22px; }
.rec-btn {
  width: 92px; height: 92px; border-radius: 50%; border: none;
  background: var(--red); color: #fff; font-size: 34px; cursor: pointer;
}
.rec-btn.recording { animation: pulse 1.2s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(229, 72, 77, .55); }
  100% { box-shadow: 0 0 0 26px rgba(229, 72, 77, 0); }
}
.rec-status { margin-top: 10px; color: var(--muted); font-size: 15px; }
.rec-actions { display: flex; gap: 10px; margin-top: 16px; }
.rec-actions .btn { margin-top: 0; font-size: 16px; padding: 13px; }

/* —— 完成页 —— */
.done-box { text-align: center; padding-top: 12vh; }
.done-box .big-emoji { font-size: 96px; }
.done-box h2 { margin-top: 14px; font-size: 24px; }
.done-box .praise { margin-top: 8px; font-size: 17px; color: var(--accent); font-weight: 700; }

.tip-box {
  background: var(--card); border-left: 4px solid var(--accent);
  border-radius: 10px; padding: 12px 14px; font-size: 15px; color: #cdd4e0; margin-top: 14px;
}

/* —— AI 点评与回应 —— */
.ai-wait { text-align: center; color: var(--muted); font-size: 16px; padding: 24px 0; animation: fade 1.2s infinite alternate; }
@keyframes fade { from { opacity: .5; } to { opacity: 1; } }
.ai-fb-card {
  background: #14231a; border-left: 4px solid var(--green);
  border-radius: 12px; padding: 14px 16px; font-size: 15px; color: #d9ecdf;
  text-align: left; margin-top: 14px;
}
.modal-overlay {
  position: fixed; inset: 0; background: rgba(5, 7, 10, .78);
  display: flex; align-items: center; justify-content: center; z-index: 50; padding: 24px;
}
.modal-card {
  background: var(--card); border-radius: 20px; padding: 32px 24px;
  text-align: center; max-width: 340px; width: 100%;
  box-shadow: 0 12px 48px rgba(0, 0, 0, .5);
}
.reaction-img { max-width: 100%; max-height: 300px; border-radius: 14px; margin-bottom: 6px; }
#rimgPrev { display: flex; align-items: center; gap: 10px; }
#rimgPrev img { max-height: 90px; border-radius: 10px; margin-bottom: 10px; }
#rimgPrev .rm { background: none; border: none; color: var(--muted); font-size: 14px; cursor: pointer; }
.reaction-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.reaction-row button {
  font-size: 24px; background: var(--card2); border: none;
  border-radius: 12px; padding: 8px 12px; cursor: pointer;
}
.reaction-row button.sel { outline: 2px solid var(--accent); }
.coach-input {
  width: 100%; background: var(--card2); border: none; border-radius: 10px;
  padding: 10px 12px; color: var(--text); font-size: 15px; margin-bottom: 10px;
}
.ai-fb {
  background: #14231a; border-left: 3px solid var(--green); border-radius: 8px;
  padding: 8px 10px; font-size: 13px; margin-top: 8px; color: #cde8d5;
}
.rec-item.love { border: 1px solid #e5488a; }

/* —— 教练面板 —— */
.coach-section { background: var(--card); border-radius: var(--radius); padding: 16px; margin-bottom: 14px; }
.coach-section h3 { font-size: 15px; color: var(--muted); margin-bottom: 10px; font-weight: 600; }
.stat-row { display: flex; gap: 10px; }
.stat {
  flex: 1; background: var(--card2); border-radius: 12px; padding: 12px; text-align: center;
}
.stat .num { font-size: 26px; font-weight: 800; }
.stat .lbl { font-size: 12px; color: var(--muted); }
.bars { display: flex; align-items: flex-end; gap: 8px; height: 90px; }
.bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.bar { width: 100%; background: var(--card2); border-radius: 6px 6px 0 0; min-height: 4px; }
.bar.done { background: var(--accent); }
.bar-lbl { font-size: 10px; color: var(--muted); }
.rec-item { background: var(--card2); border-radius: 12px; padding: 12px; margin-bottom: 10px; }
.rec-item .rec-en { font-weight: 700; font-size: 16px; }
.rec-item .rec-meta { color: var(--muted); font-size: 12px; margin: 2px 0 8px; }
.rec-item audio { width: 100%; height: 36px; }
.play-rank { display: flex; flex-wrap: wrap; gap: 8px; }
.play-rank span { background: var(--card2); border-radius: 999px; padding: 6px 12px; font-size: 14px; }