.wb-cards-page{--card-accent:#557b56;display:grid;gap:18px}
.wb-card-workspace{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:16px;align-items:start}
.wb-card-session,.wb-card-session-empty{min-height:480px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#f8f7f3}
.wb-card-session-empty{display:grid;place-content:center;text-align:center}.wb-card-session-empty strong{font-size:22px}.wb-card-session-empty p{max-width:480px;color:var(--muted);line-height:1.6}.wb-card-session-empty button{justify-self:center}
.wb-card-session-head{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:16px}.wb-card-session-head span,.wb-card-session-head strong{display:block}.wb-card-session-head span{color:var(--muted);font-size:11px}.wb-card-session-head strong{margin-top:2px}.wb-card-session-head>small{color:var(--muted)}
.wb-card-study{position:relative;max-width:720px;min-height:310px;margin:0 auto;padding:30px;border:1px solid #dad8ce;border-radius:18px;background:#fffefa;box-shadow:0 18px 46px rgba(51,57,49,.09);display:grid;place-items:center;cursor:default;touch-action:pan-y;user-select:none}
.wb-card-face-star{position:absolute;z-index:2;top:14px;right:14px;width:42px;height:42px;border:0;border-radius:50%;background:rgba(255,254,250,.92);color:#a47619;font-size:25px;cursor:pointer}
.wb-card-study::before,.wb-card-study::after{position:absolute;top:50%;z-index:3;opacity:0;transform:translateY(-50%);padding:7px 10px;border-radius:999px;font-size:12px;font-weight:800;pointer-events:none;transition:opacity .12s ease}.wb-card-study::before{left:14px;content:'還不熟';background:#f8ebe7;color:#8b4c3c}.wb-card-study::after{right:14px;content:'記得';background:#e9f3e8;color:#3f6744}.wb-card-study[data-swipe='left']::before,.wb-card-study[data-swipe='right']::after{opacity:.9}
.wb-card-face{width:min(100%,600px);text-align:center}.wb-card-kind{display:inline-block;color:#6d746c;font-size:11px;letter-spacing:.04em}.wb-card-statement{margin:28px 0;font-family:'Noto Serif TC',serif;font-size:24px;font-weight:750;line-height:1.8;color:#252a25}.wb-card-prompt{margin:28px 0;padding:20px;border:1px dashed #bdcaba;border-radius:14px;color:#596057;background:#f7f8f3;line-height:1.7}
.wb-card-reveal{min-width:132px}.wb-card-study small{color:var(--muted)}.wb-card-back-note{padding:12px;border-radius:11px;background:#f2f3ef;color:#596057;line-height:1.6;font-size:13px}
.wb-card-blank{display:inline-grid;min-width:86px;min-height:32px;place-items:center;margin:0 3px;padding:1px 9px;border:1px solid #b8c9b7;border-radius:8px;background:#e9f1e7;color:#48654a;font:600 12px/1.4 'Noto Sans TC',sans-serif;vertical-align:middle}.wb-card-blank.is-revealed{font:inherit;background:#eaf3e8;color:#28472c}
.wb-card-grade-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:720px;margin:16px auto 0}.wb-card-grade-actions button{border:0;border-radius:14px;padding:12px;display:grid;grid-template-columns:24px 1fr;align-items:center;column-gap:8px;cursor:pointer}.wb-card-grade-actions button:disabled{opacity:.45;cursor:not-allowed}.wb-card-grade-actions svg{width:22px;height:22px;grid-row:1/3}.wb-card-grade-actions span{font-weight:800;text-align:left}.wb-card-grade-actions small{font-size:10px;text-align:left}.wb-card-forgot{background:#f8ebe7;color:#8b4c3c}.wb-card-remember{background:#e9f3e8;color:#3f6744}
.wb-card-session-tools{max-width:720px;margin:10px auto 0;display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap}.wb-card-session-tools details{position:relative}.wb-card-session-tools summary{list-style:none;color:var(--accent);cursor:pointer;padding:6px 8px}.wb-card-pause-menu{position:absolute;z-index:8;right:0;top:100%;width:180px;padding:8px;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:var(--shadow);display:grid}.wb-card-pause-menu button{justify-content:flex-start}
.wb-card-inline-editor{max-width:720px;margin:0 auto;padding:18px;border:1px solid #cfd9cd;border-radius:16px;background:#fff}.wb-card-inline-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:12px}.wb-card-inline-head span{color:var(--muted);font-size:11px}.wb-card-inline-editor label{display:grid;gap:5px;margin-top:12px;color:#596057;font-size:12px;font-weight:700}.wb-card-inline-editor textarea,.wb-card-inline-editor input{width:100%;box-sizing:border-box;border:1px solid var(--line);border-radius:10px;background:#fffefa;padding:10px 12px;color:var(--ink);font:inherit;line-height:1.55}.wb-card-inline-editor textarea{resize:vertical;min-height:76px}.wb-card-inline-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}.wb-card-inline-error{margin:12px 0 0;padding:10px 12px;border-radius:9px;background:#f8ebe7;color:#8b4c3c;font-size:12px;line-height:1.5}
.wb-card-tree{position:sticky;top:84px}.wb-card-tree-body{padding:9px;max-height:600px;overflow:auto}.wb-card-tree details{margin:3px 0}.wb-card-tree summary{cursor:pointer;padding:8px;border-radius:9px;list-style:none}.wb-card-tree summary:hover{background:#f3f4f0}.wb-card-tree summary strong,.wb-card-tree summary span{display:block}.wb-card-tree summary span{color:var(--muted);font-size:10px;margin-top:2px}.wb-card-tree details details{padding-left:10px}.wb-card-tree details details summary{font-size:12px}.wb-card-tree details details summary span{display:block}.wb-card-tree-section>button{width:100%;border:0;background:transparent;border-radius:8px;padding:7px 8px;display:block;text-align:left;cursor:pointer;color:#555c54}.wb-card-tree-section>button span,.wb-card-tree-section>button small{display:block}.wb-card-tree-section>button small{margin-top:3px;color:var(--muted);font-size:10px}.wb-card-tree-section>button.active{background:#eaf2e8;color:#3f6242;font-weight:800}.wb-card-tree-cards{display:grid;gap:3px;padding:4px 0 7px 12px}.wb-card-tree-cards button{border:0;background:transparent;padding:6px 8px;border-left:2px solid #dbe5d8;color:#667066;text-align:left;font-size:10px;line-height:1.4;cursor:pointer}
.wb-card-recent{overflow:hidden}.wb-card-recent-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:12px}.wb-card-recent-list button{min-width:0;border:1px solid var(--line);border-radius:11px;background:#fff;padding:11px;text-align:left;cursor:pointer}.wb-card-recent-list span,.wb-card-recent-list strong{display:block}.wb-card-recent-list span{color:var(--muted);font-size:10px}.wb-card-recent-list strong{margin-top:5px;font-size:12px;line-height:1.45}.wb-card-recent>.text-btn{margin:0 12px 12px}
.wb-card-library{overflow:hidden}.wb-card-library-actions{display:flex;gap:7px;align-items:center}.wb-card-library-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:12px}.wb-card-library-list article{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:4px;padding:10px;border:1px solid var(--line);border-radius:12px}.wb-card-library-main{border:0;background:transparent;text-align:left;cursor:pointer;min-width:0}.wb-card-library-main span,.wb-card-library-main strong,.wb-card-library-main small{display:block}.wb-card-library-main span,.wb-card-library-main small{color:var(--muted);font-size:10px}.wb-card-library-main strong{margin:5px 0;font-size:13px;line-height:1.45}.wb-card-star{border:0;background:transparent;color:#a47619;font-size:22px;cursor:pointer}.wb-card-bulk-check{padding:8px}.wb-card-library-list article>.text-btn{grid-column:1/-1;justify-content:flex-start}
.wb-card-editor-backdrop,.wb-card-source-backdrop{position:fixed;inset:0;z-index:520;background:rgba(29,33,28,.45);backdrop-filter:blur(8px);display:grid;place-items:center;padding:20px}.wb-card-editor,.wb-card-source-modal,.wb-card-bulk-location{width:min(90vw,820px);max-height:90vh;overflow:auto;border-radius:18px;background:#fff;box-shadow:0 28px 80px rgba(0,0,0,.22)}.wb-card-editor>header,.wb-card-source-modal>header,.wb-card-bulk-location>header{position:sticky;top:0;z-index:2;background:#fff;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line)}.wb-card-editor>header span,.wb-card-editor>header strong,.wb-card-source-modal>header span,.wb-card-source-modal>header strong,.wb-card-bulk-location>header span,.wb-card-bulk-location>header strong{display:block}.wb-card-editor>header span,.wb-card-source-modal>header span,.wb-card-bulk-location>header span{color:var(--muted);font-size:11px}.wb-card-editor>p{padding:0 18px;color:var(--muted)}.wb-card-statement-editor{margin:14px 18px;padding:18px;border:1px solid var(--line);border-radius:12px;font-family:'Noto Serif TC',serif;font-size:20px;line-height:1.7}.wb-card-editor-actions{padding:0 18px 16px;display:flex;align-items:flex-start;gap:8px;flex-wrap:wrap}.wb-card-editor-actions details>div{display:grid;gap:5px;padding-top:8px}.wb-card-editor-actions small{color:var(--muted);max-width:420px}.wb-card-edit-warning{margin:12px 18px;padding:13px;border-radius:11px;background:#fff4d8;color:#755a2e}.wb-card-edit-warning.incorrect{background:#f8ebe7;color:#82483b}.wb-card-edit-warning p{line-height:1.5}.wb-card-source-list{padding:16px 18px;border-top:1px solid var(--line)}.wb-card-source-list>div{display:flex;align-items:center;gap:8px;border-top:1px solid var(--line);padding:8px 0}.wb-card-source-list>div>span{flex:1}
.wb-card-source-modal{width:min(70vw,980px);height:min(78vh,820px);touch-action:pan-y}.wb-card-source-head-actions{display:flex;align-items:center;gap:8px}.wb-card-source-paper{padding:28px 34px;min-height:360px}.wb-card-source-paper h2{font-family:'Noto Serif TC',serif;line-height:1.7}.wb-card-source-paper ol{padding-left:24px;line-height:1.8}.wb-card-source-paper li{padding:3px 7px;border-radius:7px}.wb-card-source-paper li.is-card-source-option{animation:wbCardSourceHighlight 4s ease forwards}.wb-card-source-paper img{display:block;max-width:100%;max-height:340px;object-fit:contain;margin:18px auto}.wb-card-source-paper>mark{display:block;margin-top:20px;padding:10px 12px;border-radius:9px;background:#fff1a8;color:#4c4523}.wb-card-source-meta{color:var(--muted);font-size:11px}.wb-card-source-modal>footer{position:sticky;bottom:0;display:flex;justify-content:flex-end;gap:8px;padding:14px 18px;border-top:1px solid var(--line);background:#fff}.wb-card-source-picker-list{display:grid;gap:8px;padding:18px}.wb-card-source-picker-list button{border:1px solid var(--line);border-radius:12px;background:#fff;padding:14px;text-align:left;cursor:pointer}.wb-card-source-picker-list span,.wb-card-source-picker-list strong{display:block}.wb-card-source-picker-list span{color:var(--muted);font-size:11px}.wb-card-source-picker-list strong{margin-top:5px;line-height:1.5}.wb-card-bulk-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:18px}.wb-card-bulk-fields label{display:grid;gap:5px;color:var(--muted);font-size:11px}.wb-card-bulk-fields input,.wb-card-bulk-fields select{border:1px solid var(--line);border-radius:10px;background:#fff;padding:10px}.wb-card-bulk-fields button{grid-column:1/-1;justify-self:end}.wb-watch-row{position:relative}.wb-watch-row>.text-btn{margin:-8px 0 12px 14px}
.wb-note-card-suggestion{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;padding:12px 14px;border:1px solid #d4dfd2;border-radius:12px;background:#f5f8f3}.wb-note-card-suggestion strong{font-size:13px;line-height:1.45}.wb-note-card-suggestion>div{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}.wb-note-card-suggestion button{white-space:nowrap}
.wb-saved-filters{display:flex;gap:8px;align-items:center;margin-bottom:14px;flex-wrap:wrap}.wb-saved-filters button,.wb-saved-filters select{border:1px solid var(--line);border-radius:10px;background:#fff;padding:9px 12px}.wb-saved-filters button.active{background:#edf3eb;border-color:#8eaa8f;color:#3e6241;font-weight:800}.wb-saved-list{display:grid;gap:9px}.wb-saved-row{display:grid;grid-template-columns:1fr auto;gap:4px 12px;padding:14px;border:1px solid var(--line);border-radius:13px;background:#fff}.wb-saved-row span,.wb-saved-row strong,.wb-saved-row small{grid-column:1}.wb-saved-row span,.wb-saved-row small{color:var(--muted);font-size:11px}.wb-saved-row strong{line-height:1.5}.wb-saved-row button{grid-column:2;grid-row:1/4}.wb-question-save-actions{display:flex;gap:6px;flex-wrap:wrap}
@keyframes wbCardSourceHighlight{0%,55%{background:#fff1a8}100%{background:transparent}}
@media(prefers-reduced-motion:reduce){.wb-card-source-paper li.is-card-source-option{animation:none}.wb-card-study::before,.wb-card-study::after{transition:none}}
@media(max-width:900px){.wb-card-workspace{grid-template-columns:1fr}.wb-card-tree{position:static}.wb-card-tree-body{max-height:none}.wb-card-source-modal{width:min(90vw,980px)}}
@media(max-width:640px){.wb-card-session,.wb-card-session-empty{padding:13px;min-height:420px}.wb-card-study{min-height:270px;padding:20px}.wb-card-statement{font-size:20px}.wb-card-grade-actions{gap:8px}.wb-card-inline-head{display:grid;gap:4px}.wb-card-inline-actions{justify-content:stretch}.wb-card-inline-actions button{flex:1}.wb-card-library-list,.wb-card-recent-list{grid-template-columns:1fr}.wb-card-editor-backdrop,.wb-card-source-backdrop{padding:0}.wb-card-editor,.wb-card-source-modal,.wb-card-bulk-location{width:100vw;height:100dvh;max-height:none;border-radius:0}.wb-card-source-paper{padding:20px 16px}.wb-card-source-modal>footer{display:grid;grid-template-columns:1fr 1fr}.wb-card-editor-actions,.wb-card-bulk-fields{display:grid;grid-template-columns:1fr}.wb-card-editor-actions>button,.wb-card-bulk-fields button{width:100%}.wb-note-card-suggestion{align-items:stretch;display:grid}.wb-note-card-suggestion>div{justify-content:flex-start}.wb-note-card-suggestion button{flex:1}}