.header-actions { display: flex; align-items: center; gap: 2px; }
.btn-history {
  border: 0; background: rgba(0,0,0,.04); color: var(--text); cursor: pointer;
  border-radius: 999px; padding: 8px 12px; font: 600 13px/1 inherit;
}
.btn-history:active { transform: scale(.95); }

.coach-modal {
  position: absolute; inset: 4vh max(12px, calc((100vw - 980px) / 2));
  background: rgba(250,250,252,.92); backdrop-filter: blur(40px); -webkit-backdrop-filter: blur(40px);
  border-radius: 32px; padding: 24px 28px; transform: translateY(24px) scale(.98);
  transition: transform .4s cubic-bezier(.2,.8,.2,1), opacity .3s; opacity: 0;
  display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,.15);
}
.modal-overlay.active .coach-modal { transform: translateY(0) scale(1); opacity: 1; }

/* iOS Segmented Control */
.coach-toolbar { 
  display: flex; background: rgba(118, 118, 128, 0.12); 
  border-radius: 9px; padding: 2px; margin: -4px 0 24px; 
}
.coach-tab {
  flex: 1; border: none; background: transparent; padding: 7px 0; font-size: 14px; font-weight: 500;
  border-radius: 7px; color: var(--text); cursor: pointer; transition: background 0.2s, box-shadow 0.2s;
}
.coach-tab.active { 
  background: #fff; box-shadow: 0 3px 8px rgba(0,0,0,0.12), 0 3px 1px rgba(0,0,0,0.04); 
  font-weight: 600; color: #000; 
}

.coach-button {
  border: 0; border-radius: 12px; background: rgba(0,0,0,.05); color: var(--text);
  padding: 10px 16px; font: 600 15px/1 inherit; cursor: pointer; transition: transform 0.2s, background 0.2s;
}
.coach-button:active { transform: scale(0.95); }
.coach-button.primary { background: var(--text); color: #fff; }
.coach-button.primary:active { background: #000; transform: scale(0.92); }
.coach-button.danger { color: #a22; background: rgba(180,0,0,.07); }
.coach-button:disabled { opacity: .45; cursor: wait; transform: scale(1) !important; }

.coach-status { min-height: 18px; margin-bottom: 12px; color: var(--sub); font-size: 13px; text-align: center; }
.coach-status.error { color: #b42318; }
.coach-pane { display: none; min-height: 0; flex: 1; }
.coach-pane.active { display: flex; gap: 20px; }

.coach-list { width: 310px; overflow-y: auto; padding-right: 8px; }
.coach-list::-webkit-scrollbar { width: 4px; }
.coach-list::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.1); border-radius: 2px; }

.coach-detail { flex: 1; min-width: 0; overflow-y: auto; border-left: 1px solid rgba(0,0,0,0.06); padding-left: 20px; font-size: 15px; }
.coach-detail::-webkit-scrollbar { width: 4px; }
.coach-detail::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.1); border-radius: 2px; }

/* Premium Cards */
.coach-card, .coach-memory { 
  background: #fff; border: 1px solid rgba(0,0,0,0.06); 
  border-radius: 20px; padding: 16px; margin-bottom: 12px; cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.02); transition: transform 0.2s, box-shadow 0.2s;
}
.coach-card:active { transform: scale(0.98); }
.coach-card.active { border-color: rgba(0,0,0,0.25); box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.coach-card-title { font-size: 16px; font-weight: 650; margin-bottom: 8px; }
.coach-card-meta, .coach-muted { color: var(--sub); font-size: 13px; line-height: 1.5; }
.coach-empty { color: var(--sub); text-align: center; padding: 36px 12px; font-size: 14px; }

.coach-transcript-row { padding: 12px 0; border-bottom: 1px solid rgba(0,0,0,0.05); line-height: 1.6; }
.coach-transcript-role { color: var(--sub); font-size: 12px; font-weight: 700; margin-bottom: 4px; text-transform: uppercase; letter-spacing: 0.05em; }
.coach-summary { margin: 16px 0; padding: 16px; background: rgba(0,0,0,.03); border-radius: 18px; }
.coach-summary h4 { margin: 0 0 12px; font-size: 16px; font-weight: 600; }
.coach-score-grid { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.coach-score { background: #fff; border: 1px solid rgba(0,0,0,0.05); border-radius: 12px; padding: 8px 12px; font-size: 13px; font-weight: 500; }
.coach-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }

/* Memory Form iOS Style */
.coach-memory-form { 
  display: grid; grid-template-columns: minmax(140px, auto) 1fr auto; gap: 12px 8px; margin-bottom: 16px; 
}
.coach-memory-form select, .coach-memory-form input {
  min-width: 0; border: 1px solid rgba(0,0,0,0.06); background: rgba(0,0,0,0.03); 
  border-radius: 14px; padding: 14px 16px; font-size: 15px; font-family: inherit; color: var(--text);
  outline: none; transition: background 0.3s, border-color 0.3s;
}
.coach-memory-form select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2386868b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  padding-right: 36px;
  cursor: pointer;
}
.coach-memory-form select:focus, .coach-memory-form input:focus {
  background: #fff; border-color: rgba(0,0,0,0.15); box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

.coach-memory-list { overflow-y: auto; flex: 1; padding: 4px; }
.coach-memory { cursor: default; }
.coach-memory:active { transform: none; }
.coach-memory.pending { border-color: #d7a53a; }
.coach-memory.disabled, .coach-memory.rejected { opacity: .58; }
.coach-memory-head { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.coach-badge { font-size: 11px; font-weight: 600; color: var(--sub); background: rgba(0,0,0,.06); border-radius: 999px; padding: 4px 10px; white-space: nowrap; }
.coach-memory-content { white-space: pre-wrap; font-size: 15px; line-height: 1.6; }

/* 训练结束成绩单 */
.coach-result-overlay {
  position: fixed; inset: 0; z-index: 60; display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.35); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  opacity: 0; pointer-events: none; transition: opacity .25s;
}
.coach-result-overlay.active { opacity: 1; pointer-events: auto; }
.coach-result-card {
  width: min(560px, calc(100vw - 32px)); max-height: 82vh; overflow-y: auto;
  background: rgba(250,250,252,.97); border-radius: 28px; padding: 24px 26px;
  box-shadow: 0 24px 70px rgba(0,0,0,.28);
}
.coach-result-card h3 { margin: 0 0 4px; font-size: 19px; }
.coach-result-sub { color: var(--sub); font-size: 13px; margin-bottom: 14px; }
.coach-result-section { margin: 14px 0 0; }
.coach-result-section strong { font-size: 14px; }
.coach-result-section ul { margin: 6px 0 0; padding-left: 20px; font-size: 14px; line-height: 1.6; }
.coach-result-pending { margin-top: 16px; padding: 12px 14px; background: rgba(215,165,58,.12); border-radius: 14px; font-size: 13px; }

/* Back button (hidden on desktop) */
.coach-detail-header { display: none; }
.coach-back-btn {
  background: transparent; border: none; padding: 4px 0 16px; 
  font-size: 16px; font-weight: 600; color: var(--text); 
  cursor: pointer; align-items: center; display: flex;
}
.coach-back-btn:active { opacity: 0.7; }

@media (max-width: 720px) {
  .coach-modal { inset: 2vh 8px; border-radius: 28px; padding: 20px 16px; }
  .coach-pane.active { display: flex; flex-direction: row; width: 100%; overflow: hidden; }
  .coach-list { width: 100%; flex-shrink: 0; padding-right: 0; display: block; }
  .coach-detail { width: 100%; flex-shrink: 0; border-left: 0; padding: 0; display: none; overflow-y: auto; }
  .coach-pane.showing-detail .coach-list { display: none; }
  .coach-pane.showing-detail .coach-detail { display: block; }
  .coach-detail-header { display: block; }
  .coach-memory-form { grid-template-columns: 1fr auto; }
  .coach-memory-form select { grid-column: 1 / -1; }
}