/* Reading Feedback AI — frontend.css v2.2 */
.rfa-box{max-width:640px;margin:24px 0;font-family:inherit}
.rfa-tabs{display:flex;gap:8px;margin-bottom:16px}
.rfa-tab{padding:10px 20px;border:2px solid #b0bec5;border-radius:25px;background:#fff;cursor:pointer;font-size:.95em;color:#555;font-weight:600;transition:all .2s}
.rfa-tab:hover{border-color:#1d4e89;color:#1d4e89}
.rfa-tab-active{background:#1d4e89;color:#fff!important;border-color:#1d4e89}
.rfa-tab-panel{border:1px solid #e0e0e0;border-radius:10px;padding:24px;background:#fafafa}
.rfa-recorder{text-align:center;padding:10px 0}
.rfa-rec-display{margin-bottom:20px}
.rfa-rec-icon{font-size:48px;margin-bottom:8px}
.rfa-rec-timer{font-size:32px;font-weight:700;color:#1d4e89;letter-spacing:2px;margin-bottom:6px}
.rfa-rec-hint{font-size:.9em;color:#888}
.rfa-rec-waves{display:flex;justify-content:center;align-items:flex-end;gap:4px;height:36px;margin-bottom:16px}
.rfa-rec-waves span{display:inline-block;width:5px;background:#1d4e89;border-radius:3px;animation:rfa-wave 1s ease-in-out infinite}
.rfa-rec-waves span:nth-child(1){animation-delay:0s}
.rfa-rec-waves span:nth-child(2){animation-delay:.15s}
.rfa-rec-waves span:nth-child(3){animation-delay:.3s}
.rfa-rec-waves span:nth-child(4){animation-delay:.15s}
.rfa-rec-waves span:nth-child(5){animation-delay:0s}
@keyframes rfa-wave{0%,100%{height:8px;opacity:.4}50%{height:32px;opacity:1}}
.rfa-btn-record{padding:14px 32px;background:#1d4e89;color:#fff;border:none;border-radius:30px;font-size:1.05em;font-weight:700;cursor:pointer;transition:background .2s,transform .1s;letter-spacing:.3px}
.rfa-btn-record:hover{background:#163a6a}
.rfa-btn-record.rfa-recording{background:#c62828}
.rfa-btn-record.rfa-recording:hover{background:#b71c1c}
.rfa-preview{text-align:left}
.rfa-preview-label{font-weight:600;color:#333;margin:0 0 8px}
.rfa-preview-actions{display:flex;gap:10px;flex-wrap:wrap}
.rfa-btn-rerecord{padding:11px 20px;background:#fff;color:#555;border:2px solid #ccc;border-radius:25px;font-size:.95em;font-weight:600;cursor:pointer;transition:all .2s}
.rfa-btn-rerecord:hover{border-color:#1d4e89;color:#1d4e89}
.rfa-mic-error{background:#fff3e0;border:1px solid #ffcc02;border-radius:8px;padding:14px 18px;color:#e65100;font-size:.9em;margin-top:12px}
.rfa-upload-zone{border:2px dashed #b0bec5;border-radius:10px;padding:36px 24px;text-align:center;background:#fff;transition:border-color .2s,background .2s;cursor:pointer}
.rfa-upload-zone.rfa-drag{border-color:#1d4e89;background:#e8f0fb}
.rfa-icon{font-size:36px;margin-bottom:8px}
.rfa-label{color:#555;margin:0 0 12px;line-height:1.6}
.rfa-label span{color:#aaa;font-size:.9em}
.rfa-btn-choose{display:inline-block;padding:10px 24px;background:#1d4e89;color:#fff;border-radius:25px;cursor:pointer;font-size:.9em;font-weight:600;transition:background .2s}
.rfa-btn-choose:hover{background:#163a6a}
.rfa-hint{margin:12px 0 0;font-size:.8em;color:#90a4ae}
.rfa-selected{display:flex;align-items:center;gap:12px;padding:14px 18px;background:#e8f5e9;border:1px solid #a5d6a7;border-radius:8px;margin-bottom:12px}
.rfa-file-icon{font-size:22px}
.rfa-selected span:nth-child(2){flex:1;font-size:.9em;color:#2e7d32;font-weight:600}
.rfa-btn-clear{background:none;border:none;color:#888;cursor:pointer;font-size:18px;line-height:1;padding:0 4px}
.rfa-btn-clear:hover{color:#c62828}
.rfa-btn-send{width:100%;padding:14px;background:#388e3c;color:#fff;border:none;border-radius:8px;font-size:1.05em;font-weight:700;cursor:pointer;transition:background .2s,transform .1s;letter-spacing:.3px}
.rfa-btn-send:hover{background:#2e7d32}
.rfa-btn-send:active{transform:scale(.98)}
.rfa-btn-send:disabled{background:#90a4ae;cursor:default}
.rfa-status{display:flex;align-items:center;gap:14px;padding:16px 20px;background:#e3f2fd;border-radius:8px;margin-top:14px}
.rfa-status.rfa-error{background:#ffebee;color:#c62828}
.rfa-spinner{width:22px;height:22px;border:3px solid #90caf9;border-top-color:#1d4e89;border-radius:50%;animation:rfa-spin .8s linear infinite;flex-shrink:0}
@keyframes rfa-spin{to{transform:rotate(360deg)}}
.rfa-waiting{text-align:center;padding:32px 24px;background:#fff8e1;border:1px solid #ffe082;border-radius:10px;margin-top:14px}
.rfa-waiting-icon{font-size:36px;margin-bottom:10px}
.rfa-waiting p{margin:0 0 8px;color:#5d4037;font-weight:600}
.rfa-waiting-sub{font-size:.85em!important;color:#8d6e63!important;font-weight:normal!important}
.rfa-result-inner{border:1px solid #e0e0e0;border-radius:10px;overflow:hidden;margin-top:20px}
.rfa-score-block{text-align:center;padding:28px;background:#f5f5f5;border-bottom:1px solid #e0e0e0}
.rfa-score-num{font-size:56px;font-weight:800;line-height:1}
.rfa-score-den{font-size:26px;color:#bdbdbd}
.rfa-score-label{margin:8px 0 0;font-size:1.1em;font-weight:700}
.rfa-level-badge{background:#e3f2fd;color:#1565c0;padding:3px 10px;border-radius:12px;font-size:.75em;margin-left:8px;font-weight:600;vertical-align:middle}
.rfa-section{padding:18px 22px;border-bottom:1px solid #f0f0f0}
.rfa-section h4{margin:0 0 12px;color:#1d4e89;font-size:.95em}
.rfa-section p{margin:0;color:#444;line-height:1.65}
.rfa-section ul{margin:0;padding-left:20px;color:#444}
.rfa-section li{margin-bottom:6px;line-height:1.5}
.rfa-section.rfa-green{background:#f1f8e9}
.rfa-section.rfa-amber{background:#fff8e1}
.rfa-dim{margin-bottom:16px}
.rfa-dim-header{display:flex;justify-content:space-between;font-size:.9em;margin-bottom:5px}
.rfa-bar{background:#e0e0e0;border-radius:4px;height:8px}
.rfa-bar-fill{height:100%;border-radius:4px;transition:width .5s ease}
.rfa-dim-comment{margin:5px 0 0;font-size:.84em;color:#666}
.rfa-correction{background:#fff8e1;border-left:3px solid #ffc107;padding:12px 16px;border-radius:4px;font-family:monospace;font-size:.9em;color:#444;white-space:pre-wrap;margin:0}
.rfa-encouragement{padding:18px 22px;background:linear-gradient(135deg,#e8f5e9,#f9fbe7);border-top:2px solid #a5d6a7}
.rfa-encouragement p{margin:0;font-style:italic;color:#2e7d32;line-height:1.6}
.rfa-notice{padding:14px 18px;background:#fff3cd;border:1px solid #ffc107;border-radius:6px;color:#856404}