:root{--bg:#121316;--bg-stage:#17181d;--bg-card:#1b1c21;--bg-card-hover:#202128;--bg-btn:#26282f;--bg-btn-hover:#31333d;--border:#2b2d35;--text:#e4e6eb;--text-dim:#9aa0ab;--text-faint:#6b7280;--accent:#7c9eff;--accent-strong:#5d83f5;--danger:#e06c75;--sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--serif:Georgia, "Times New Roman", "Songti SC", serif}*{box-sizing:border-box}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0}button{cursor:pointer;font-family:inherit}::selection{background:#7c9eff4d}.ghost-btn{border:1px solid var(--border);color:var(--text);background:0 0;border-radius:8px;padding:8px 16px;font-size:13px;transition:background .15s,border-color .15s}.ghost-btn:hover{background:var(--bg-card-hover);border-color:#3a3d47}.text-btn{color:var(--text-dim);background:0 0;border:none;border-radius:6px;padding:6px 8px;font-size:13px}.text-btn:hover{color:var(--text);background:var(--bg-btn)}.icon-btn{background:var(--bg-btn);color:var(--text);letter-spacing:.04em;border:none;border-radius:6px;min-width:30px;height:28px;padding:0 8px;font-size:12px;font-weight:600;transition:background .15s}.icon-btn:hover:not(:disabled){background:var(--bg-btn-hover)}.icon-btn:disabled{opacity:.35;cursor:default}.icon-btn.danger:hover:not(:disabled){color:var(--danger);background:#e06c752e}.link-btn{color:var(--accent);background:0 0;border:none;padding:4px;font-size:13px}.link-btn:hover{text-decoration:underline}.shelf-page,.vocab-page{max-width:980px;margin:0 auto;padding:44px 24px 64px}.shelf-header{justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:28px;display:flex}.app-title{letter-spacing:.01em;margin:0;font-size:24px;font-weight:700}.app-subtitle{color:var(--text-faint);margin:6px 0 0;font-size:13px}.notice-banner{color:#f0a8b0;background:#e06c751a;border:1px solid #e06c754d;border-radius:8px;margin-bottom:16px;padding:10px 14px;font-size:13px}.import-dropzone{text-align:center;cursor:pointer;border:1.5px dashed #33363f;border-radius:14px;margin-bottom:32px;padding:40px 24px;transition:border-color .15s,background .15s}.import-dropzone:hover,.import-dropzone.dragging{border-color:var(--accent-strong);background:#7c9eff0d}.import-icon{background:var(--bg-btn);width:44px;height:44px;color:var(--accent);border-radius:50%;margin:0 auto 12px;font-size:24px;font-weight:300;line-height:44px}.import-text{margin-bottom:6px;font-size:15px;font-weight:600}.import-hint{color:var(--text-faint);font-size:12px}.book-grid{grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:20px;display:grid}.book-card{background:var(--bg-card);border:1px solid var(--border);cursor:pointer;border-radius:12px;transition:transform .15s,border-color .15s,background .15s;position:relative;overflow:hidden}.book-card:hover{background:var(--bg-card-hover);border-color:#3a3d47;transform:translateY(-3px)}.book-cover{border-bottom:1px solid var(--border);background:linear-gradient(150deg,#23252e 0%,#1a1c23 100%);justify-content:center;align-items:center;height:170px;display:flex;position:relative}.book-cover-letter{font-family:var(--serif);color:#7c9eff8c;-webkit-user-select:none;user-select:none;font-size:56px}.book-type-badge{letter-spacing:.08em;color:var(--text-faint);background:#00000059;border-radius:4px;padding:2px 7px;font-size:10px;font-weight:700;position:absolute;bottom:10px;left:10px}.book-delete{width:26px;height:26px;color:var(--text-dim);opacity:0;z-index:1;background:#00000073;border:none;border-radius:50%;font-size:15px;line-height:1;transition:opacity .15s,color .15s,background .15s;position:absolute;top:8px;right:8px}.book-card:hover .book-delete{opacity:1}.book-delete:hover{color:var(--danger);background:#000000a6}.book-info{padding:12px 14px 14px}.book-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;min-height:2.7em;font-size:14px;font-weight:600;line-height:1.35;display:-webkit-box;overflow:hidden}.book-author{color:var(--text-faint);white-space:nowrap;text-overflow:ellipsis;margin:4px 0 10px;font-size:12px;overflow:hidden}.book-progress-row{align-items:center;gap:8px;display:flex}.book-progress-track{background:var(--bg-btn);border-radius:2px;flex:1;height:3px;overflow:hidden}.book-progress-fill{background:var(--accent);border-radius:2px;height:100%;transition:width .3s}.book-progress-text{color:var(--text-faint);text-align:right;min-width:34px;font-size:11px}.empty-shelf{text-align:center;color:var(--text-dim);padding:40px 0;font-size:14px}.empty-shelf p{margin:6px 0}.sample-entry{text-align:center;margin-top:28px}.vocab-list{max-width:720px;margin:0;padding:0;list-style:none}.vocab-item{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;justify-content:space-between;align-items:center;gap:16px;margin-bottom:10px;padding:14px 16px;display:flex}.vocab-main{flex:1;min-width:0}.vocab-word-row{flex-wrap:wrap;align-items:baseline;gap:10px;display:flex}.vocab-word{font-size:17px;font-weight:700}.vocab-phonetic{color:var(--text-faint);font-size:13px;font-family:var(--serif);align-items:center;gap:5px;display:inline-flex}.vocab-meanings{margin-top:5px}.vocab-translation{color:#c6d2f5;margin-top:2px;font-size:13.5px;line-height:1.55}.vocab-actions{flex-shrink:0;gap:8px;display:flex}.icon-btn.speak-inline{justify-content:center;align-items:center;width:30px;padding:0;display:inline-flex}.reader-page{background:var(--bg-stage);flex-direction:column;height:100vh;display:flex}.reader-topbar{border-bottom:1px solid var(--border);z-index:10;background:#121316eb;flex-shrink:0;align-items:center;gap:12px;height:52px;padding:0 16px;display:flex}.reader-title{color:var(--text-dim);text-align:center;white-space:nowrap;text-overflow:ellipsis;flex:1;padding:0 8px;font-size:13px;overflow:hidden}.reader-topbar-right{align-items:center;gap:8px;display:flex}.reader-percent{color:var(--text-faint);text-align:right;font-variant-numeric:tabular-nums;min-width:38px;font-size:12px}.reader-stage{flex:1;min-height:0;position:relative;overflow:hidden}.epub-viewer{position:absolute;inset:0}.txt-stage{position:absolute;inset:0;overflow:hidden}.txt-flow{height:100%;font-family:var(--serif);color:#d6d9e0;text-align:justify;-webkit-hyphens:auto;hyphens:auto;column-fill:auto;will-change:transform;padding-top:8px;line-height:1.8;transition:transform .22s;position:absolute;top:0}.txt-flow p{margin:0 0 1.05em}.txt-flow .para-zh{color:#8f97a8;text-align:left;margin:-.45em 0 1.35em;font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:.82em;line-height:1.7}.txt-flow .para-zh-pending{opacity:.55}.txt-flow .para-zh-error{opacity:.7;cursor:pointer;color:var(--accent)}.icon-btn.toggle-on{background:var(--accent);color:#fff}.reader-bottombar{border-top:1px solid var(--border);z-index:10;background:#121316eb;flex-shrink:0;justify-content:space-between;align-items:center;height:48px;padding:8px 20px;display:flex}.nav-btn{border:1px solid var(--border);color:var(--text-dim);background:0 0;border-radius:8px;padding:6px 16px;font-size:13px;transition:background .15s,color .15s}.nav-btn:hover:not(:disabled){background:var(--bg-card-hover);color:var(--text)}.nav-btn:disabled{opacity:.3;cursor:default}.page-indicator{color:var(--text-faint);font-variant-numeric:tabular-nums;font-size:12px}.reader-progress-track{z-index:20;background:0 0;width:100%;height:2px;position:fixed;bottom:0;left:0}.reader-progress-fill{background:var(--accent);height:100%;transition:width .25s}.reader-notice,.reader-notice-page{color:var(--text-dim);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:24px;font-size:14px;display:flex;position:absolute;inset:0}.reader-notice-page{height:100vh;position:relative}.word-popup{z-index:100;background:#202128;border:1px solid #34363f;border-radius:12px;padding:14px 16px;animation:.12s popup-in;position:fixed;box-shadow:0 12px 40px #0000008c}@keyframes popup-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.word-popup-word{font-size:21px;font-weight:700;font-family:var(--serif);word-break:break-word}.phonetic-rows{gap:18px;margin-top:8px;display:flex}.phonetic-row{align-items:center;gap:7px;display:flex}.phonetic-label{letter-spacing:.06em;color:var(--accent);background:#7c9eff1f;border-radius:4px;padding:1px 5px;font-size:10px;font-weight:700}.phonetic-text{color:var(--text-dim);font-size:13px;font-family:var(--serif)}.speak-btn{background:var(--bg-btn);width:26px;height:26px;color:var(--text-dim);cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;transition:background .15s,color .15s;display:inline-flex}.speak-btn:hover{background:var(--accent-strong);color:#fff}.word-popup-body{max-height:190px;margin-top:12px;overflow-y:auto}.meaning-list{margin:0;padding:0;list-style:none}.meaning-list li{color:#c6d2f5;margin-bottom:5px;padding-left:14px;font-size:14px;line-height:1.6;position:relative}.meaning-list li:before{content:"";background:var(--accent);border-radius:50%;width:4px;height:4px;position:absolute;top:.7em;left:2px}.word-popup-definition{border-top:1px solid var(--border);color:var(--text-faint);margin-top:8px;padding-top:8px;font-size:12.5px;line-height:1.6}.word-popup-loading,.word-popup-empty{color:var(--text-faint);padding:4px 0;font-size:13px}.word-popup-save{background:var(--accent-strong);color:#fff;border:none;border-radius:8px;width:100%;margin-top:12px;padding:9px 0;font-size:13px;font-weight:600;transition:background .15s}.word-popup-save:hover:not(:disabled){background:#4a73f0}.word-popup-save.saved,.word-popup-save:disabled{background:var(--bg-btn);color:var(--text-faint);cursor:default}