@import"https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@400;600;700&family=Noto+Sans+TC:wght@300;400;500;700&display=swap";*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--ink: #1a1209;--brown: #6b3a1f;--amber: #c46a1a;--cream: #faf6ef;--paper: #f3ecdf;--border: #ddd0b8;--muted: #8a6a4a;--green: #3d6b1a;--green-light: #e8f3dc;--red: #c0392b;--red-light: #fdedec;--blue: #1a4a6b;--shadow: rgba(30,15,5,.1)}body{background:var(--paper);font-family:Noto Sans TC,sans-serif;color:var(--ink)}.app{min-height:100vh;display:flex;flex-direction:column;position:relative}.brand-logo{display:flex;align-items:center;gap:8px;font-family:"Noto Serif TC",serif;font-weight:700;color:var(--ink);-webkit-user-select:none;user-select:none}.brand-logo em{color:var(--amber);font-style:normal}.topbar{position:sticky;top:0;z-index:100;background:#f3ecdff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;min-height:60px;gap:12px;flex-wrap:nowrap}.topbar-logo{font-size:20px;letter-spacing:.5px;cursor:pointer;transition:opacity .2s}.topbar-logo:hover{opacity:.8}.topbar-right{display:flex;gap:8px;align-items:center;flex-wrap:nowrap;overflow-x:auto;-ms-overflow-style:none;scrollbar-width:none;padding:8px 0;flex-grow:1;min-width:0;justify-content:flex-end}.topbar-right::-webkit-scrollbar{display:none}.pill{flex-shrink:0;white-space:nowrap;padding:0 16px;height:34px;border-radius:20px;font-size:13px;font-weight:500;border:1.5px solid var(--border);background:#fff6;color:var(--brown);cursor:pointer;transition:all .18s;display:inline-flex;align-items:center;justify-content:center}.pill:hover,.pill.active{background:var(--amber);color:#fff;border-color:var(--amber)}.btn-primary,.btn-secondary,.btn-danger{height:44px;padding:0 24px;border-radius:12px;font-size:14.5px;cursor:pointer;transition:all .2s;font-weight:500;display:inline-flex;align-items:center;justify-content:center;box-sizing:border-box;font-family:Noto Sans TC,sans-serif}.btn-primary{background:var(--amber);color:#fff;border:none}.btn-primary:hover:not(:disabled){background:#a5561a}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:transparent;color:var(--brown);border:1.5px solid var(--border)}.btn-secondary:hover{background:#6b3a1f0d}.btn-danger{background:var(--red);color:#fff;border:none}.btn-danger:hover{background:#962d22}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#1a120980;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background:var(--cream);border-radius:16px;width:100%;max-width:600px;max-height:90vh;overflow-y:auto;box-shadow:0 10px 40px #0003;padding:24px;animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;border-bottom:1.5px solid var(--border);padding-bottom:12px}.modal-header h2{font-family:"Noto Serif TC",serif;font-size:20px;color:var(--ink)}.close-btn{background:none;border:none;font-size:22px;color:var(--muted);cursor:pointer;padding:4px;line-height:1;border-radius:50%;width:32px;height:32px;transition:all .2s;display:flex;align-items:center;justify-content:center}.close-btn:hover{background:var(--paper);color:var(--ink)}.confirm-box{max-width:360px;text-align:center;padding:32px 24px 28px}.confirm-title{font-family:"Noto Serif TC",serif;font-size:20px;color:var(--ink);margin-bottom:12px}.confirm-msg{font-size:14px;color:var(--muted);line-height:1.6;margin-bottom:28px}.confirm-actions{display:flex;gap:12px;width:100%;justify-content:center}.confirm-actions>button{flex:1}.toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%);background:var(--ink);color:#fff;padding:12px 24px;border-radius:30px;font-size:14px;font-weight:500;z-index:999;box-shadow:0 6px 16px #0003;animation:toastUp .3s cubic-bezier(.175,.885,.32,1.275);display:flex;align-items:center;gap:8px}@keyframes toastUp{0%{transform:translate(-50%,20px);opacity:0}to{transform:translate(-50%);opacity:1}}.filter-panel{max-width:900px;margin:0 auto 24px;padding:0 24px;display:flex;flex-direction:column;gap:20px}.filter-main-row{display:flex;align-items:center;gap:16px;width:100%}.search-group{position:relative;flex:1;display:flex;align-items:center}.search-icon{position:absolute;left:16px;color:var(--muted);font-size:15px}.search-input{width:100%;height:48px;padding:0 16px 0 44px;border-radius:14px;border:1.5px solid var(--border);background:#fff;font-size:15px;outline:none;transition:all .2s;box-shadow:0 2px 8px var(--shadow)}.search-input:focus{border-color:var(--amber);box-shadow:0 4px 12px #c46a1a1a}.filter-count-label{font-size:13px;color:var(--muted);font-weight:500;white-space:nowrap}.subject-nav{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;-ms-overflow-style:none;scrollbar-width:none;border-bottom:2px solid var(--border)}.subject-nav::-webkit-scrollbar{display:none}.subject-tab{display:flex;align-items:center;gap:8px;padding:10px 16px;border:none;background:transparent;cursor:pointer;border-radius:10px 10px 0 0;transition:all .2s;white-space:nowrap;border-bottom:3px solid transparent;margin-bottom:-2px}.subject-tab .tab-icon{font-size:18px}.subject-tab .tab-text{font-size:14.5px;font-weight:500;color:var(--muted)}.subject-tab:hover{background:#00000008}.subject-tab.active{border-bottom-color:var(--tab-color, var(--amber))}.subject-tab.active .tab-text{color:var(--ink);font-weight:700}.advanced-filters{display:flex;flex-wrap:wrap;gap:24px;padding:16px 20px;background:#6b3a1f08;border-radius:16px;border:1px solid var(--border)}.filter-group{display:flex;flex-direction:column;gap:6px}.filter-group label{font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.filter-select-mini{height:32px;border:1.5px solid var(--border);border-radius:8px;background:#fff;font-size:13px;padding:0 8px;outline:none;cursor:pointer}.pill-mini-group{display:flex;gap:4px}.pill-mini{height:32px;padding:0 12px;border-radius:8px;border:1.5px solid var(--border);background:#fff;font-size:13px;color:var(--brown);cursor:pointer;transition:all .2s}.pill-mini:hover{background:var(--paper)}.pill-mini.active{background:var(--brown);color:#fff;border-color:var(--brown)}.edit-form{display:flex;flex-direction:column;gap:16px;padding:18px 24px;background:#fdfaf6;border-radius:14px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-size:12.5px;color:var(--muted);font-weight:600}.form-input,.form-textarea{width:100%;border:1.5px solid var(--border);border-radius:10px;padding:12px;font-size:14px;font-family:Noto Sans TC,sans-serif;background:#fff;color:var(--ink);outline:none;transition:border-color .2s}.form-input:focus,.form-textarea:focus{border-color:var(--amber)}.form-textarea{resize:vertical;min-height:80px;line-height:1.6}.form-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:12px}.import-tabs{display:flex;gap:8px;margin-bottom:16px}.tab-btn{padding:0 16px;height:34px;border-radius:20px;border:1.5px solid var(--border);background:transparent;font-size:13px;color:var(--brown);cursor:pointer;display:inline-flex;align-items:center}.tab-btn.active{background:var(--brown);color:#fff;border-color:var(--brown)}.md-textarea{width:100%;height:200px;border:1.5px solid var(--border);border-radius:10px;padding:14px;font-size:13.5px;font-family:Courier New,monospace;background:#fdfaf6;color:var(--ink);resize:vertical;outline:none;line-height:1.6}.md-textarea:focus{border-color:var(--amber)}.file-drop{border:2px dashed var(--border);border-radius:10px;padding:40px;text-align:center;cursor:pointer;color:var(--muted);font-size:14.5px;transition:border-color .2s;background:#fdfaf6}.file-drop:hover{border-color:var(--amber);color:var(--brown)}.export-row{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:var(--paper);border-radius:12px;border:1px solid var(--border);margin-bottom:10px}.export-row-label{font-size:14px;color:var(--brown);font-weight:600}.export-row-desc{font-size:12px;color:var(--muted);margin-top:4px}.cards-wrap{max-width:800px;margin:0 auto;padding:0 24px 60px;width:100%;display:flex;flex-direction:column;gap:16px}.note-card{background:var(--cream);border:1.5px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:0 2px 12px var(--shadow);transition:box-shadow .2s;animation:fadeUp .35s ease both}.note-card.is-learned{border-color:#a8cc78;background:#f6faf0}.note-card.is-editing{border-color:var(--amber);box-shadow:0 0 0 2px #c46a1a26}.card-front{padding:24px;cursor:pointer}.card-header{display:flex;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}.tag{display:inline-flex;align-items:center;padding:0 10px;height:24px;border-radius:12px;font-size:11.5px;font-weight:500;white-space:nowrap}.tag-topic{background:#f0e3cc;color:#7a3a10}.tag-custom{background:#e6f0fa;color:#1a4a6b}.learned-badge{font-size:11.5px;color:var(--green);background:var(--green-light);padding:0 10px;height:24px;border-radius:12px;display:inline-flex;align-items:center}.due-badge{font-size:11.5px;color:var(--red);background:var(--red-light);padding:0 10px;height:24px;border-radius:12px;font-weight:700;display:inline-flex;align-items:center}.card-actions{margin-left:auto;display:flex;gap:6px}.action-btn{background:none;border:none;font-size:15px;cursor:pointer;padding:4px;border-radius:6px;filter:grayscale(1);opacity:.5;transition:all .2s}.action-btn:hover{background:var(--paper);filter:grayscale(0);opacity:1}.card-title{font-family:"Noto Serif TC",serif;font-size:20px;font-weight:700;color:var(--ink);margin-bottom:10px;line-height:1.4}.card-topic{font-size:14.5px;color:var(--brown);line-height:1.8;white-space:pre-wrap}.expand-hint{font-size:12px;color:#b8a080;margin-top:14px;font-weight:500}.card-back{border-top:1.5px solid var(--border);display:grid;grid-template-columns:1fr 1px 1fr;padding:0}.back-col{padding:24px}.back-divider{background:var(--border)}.memory-col{background:#f8f4ee}.note-col{background:#f2f6fc}.back-col-label{font-size:12px;color:var(--muted);margin-bottom:10px;font-weight:600}.back-col-text{font-size:14px;color:var(--ink);line-height:1.8;white-space:pre-wrap}.card-action-bar{grid-column:1 / -1;display:flex;align-items:center;justify-content:flex-end;padding:16px 24px;background:#f2f6fc}.learned-btn{padding:0 20px;height:36px;border-radius:18px;font-size:13px;font-weight:500;border:1.5px solid var(--brown);background:transparent;color:var(--brown);cursor:pointer;transition:all .2s;display:inline-flex;align-items:center}.learned-btn:hover{background:#6b3a1f0d}.learned-btn.active{background:var(--green);border-color:var(--green);color:#fff}.dashboard-header{max-width:800px;margin:0 auto;width:100%;padding:24px 24px 16px}.prog-wrap{width:100%}.prog-label{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:8px}.prog-title{font-size:15px;font-weight:700;color:var(--ink)}.prog-stats{font-size:12.5px;color:var(--muted);font-weight:500}.prog-bar{height:8px;background:var(--border);border-radius:99px;overflow:hidden}.prog-fill{height:100%;background:linear-gradient(90deg,var(--amber),#e8902a);border-radius:99px;transition:width .5s ease}.dashboard-simple-stats{display:flex;align-items:center;gap:10px;margin-top:12px;font-size:13px;color:var(--muted)}.dashboard-simple-stats .dot{opacity:.3}.pill-small{background:var(--amber);color:#fff;font-size:10px;font-weight:700;padding:2px 8px;border-radius:10px}.welcome-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;flex-grow:1;padding:40px 24px;text-align:center}.welcome-brand-icon{display:flex;justify-content:center;margin-bottom:20px;animation:slideUp .6s ease;cursor:default}.welcome-tagline{font-family:"Noto Serif TC",serif;font-size:26px;font-weight:700;color:var(--ink);margin-bottom:12px;animation:slideUp .7s ease}.welcome-sub{font-size:15px;color:var(--muted);line-height:1.8;max-width:480px;margin-bottom:40px;animation:slideUp .8s ease}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;max-width:800px;width:100%;margin-bottom:40px;animation:slideUp 1s ease}.feat-card{background:var(--cream);border:1.5px solid var(--border);border-radius:16px;padding:24px;text-align:left}.feat-icon{font-size:28px;margin-bottom:12px}.feat-title{font-family:"Noto Serif TC",serif;font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}.feat-desc{font-size:13.5px;color:var(--muted);line-height:1.6}.welcome-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;animation:slideUp 1.2s ease}.review-mode{max-width:680px;margin:0 auto;padding:24px 24px 60px;display:flex;flex-direction:column;gap:18px;width:100%}.review-header{width:100%;display:flex;align-items:center;justify-content:space-between}.back-link{font-size:14px;color:var(--muted);cursor:pointer;background:none;border:none;font-family:Noto Sans TC,sans-serif;font-weight:600}.back-link:hover{color:var(--amber)}.review-progress{font-size:13.5px;color:var(--muted);font-weight:600}.review-card{position:relative;max-width:100%;margin:0 auto;width:100%;cursor:default}mark{background:#fef1b8;color:#a5561a;padding:0 4px;border-radius:4px;border-bottom:2px solid #fadd8d;font-weight:inherit}u{text-decoration:underline;text-decoration-color:var(--red);text-underline-offset:4px;text-decoration-style:solid;font-weight:inherit}.editable-content:focus{outline:none;background:#f1c40f08;border-radius:8px}.anno-toolbar{position:absolute;top:12px;right:12px;z-index:100;background:#ffffffd9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:12px;padding:6px;display:flex;gap:6px;box-shadow:0 6px 16px var(--shadow)}.anno-btn{width:36px;height:36px;border-radius:8px;border:none;background:transparent;color:var(--ink);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;transition:all .2s}.anno-btn:hover{background:#0000000d}.anno-btn.active{background:var(--amber);color:#fff;box-shadow:0 2px 8px #c46a1a4d}.sm2-action-bar{grid-column:1 / -1;padding:24px;background:#fff;border-top:1.5px solid var(--border);text-align:center}.sm2-prompt{font-size:14px;color:var(--muted);margin-bottom:16px;font-weight:500}.sm2-buttons{display:flex;gap:12px;justify-content:center}.sm2-btn{flex:1;padding:14px 0;border-radius:12px;border:none;font-size:16px;font-weight:600;cursor:pointer;transition:transform .1s,filter .2s;color:#fff;display:flex;flex-direction:column;align-items:center;gap:6px}.sm2-btn:hover{filter:brightness(.9);transform:translateY(-2px)}.sm2-btn small{font-size:12px;opacity:.85;font-weight:400}.btn-again{background:var(--red)}.btn-hard{background:#e67e22}.btn-easy{background:var(--green)}.empty{padding:60px 24px;text-align:center}.empty-h{font-family:"Noto Serif TC",serif;font-size:22px;color:var(--ink);margin-bottom:8px}.empty-p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:24px}.app-version{font-size:12px;color:var(--muted);opacity:.6;margin-top:32px;letter-spacing:.5px}.cards-wrap{max-width:900px}.dashboard-header{max-width:900px;margin-bottom:24px}@media (max-width: 560px){.topbar{padding:0 16px;min-height:56px;gap:12px}.topbar-right{padding-right:16px;margin-right:-16px;justify-content:flex-start}.anno-toolbar{position:relative;top:0;right:0;width:100%;justify-content:center;margin-bottom:12px;background:var(--paper);box-shadow:none;border:1px dashed var(--border)}.dashboard-header{padding:20px 16px 12px}.welcome-screen{padding:30px 16px}.welcome-tagline{font-size:24px}.search-input{height:44px}.advanced-filters{gap:16px;padding:12px}.filter-main-row{flex-direction:column;align-items:flex-start}.filter-count-label{order:-1;margin-bottom:4px}.subject-nav{padding-bottom:0}.subject-tab{padding:8px 12px}.cards-wrap{padding:0 16px 60px}.card-back{grid-template-columns:1fr}.back-divider{display:none}.note-col{border-top:1.5px solid var(--border);padding-bottom:8px}.card-action-bar{padding-top:0}.sm2-buttons{flex-direction:column}.export-row{flex-direction:column;align-items:flex-start;gap:12px}.export-row .btn-primary,.export-row .btn-secondary,.export-row .btn-danger{width:100%}}