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0;width:100%;padding:0}.library-cover{background:var(--soft);height:170px;color:var(--accent);align-items:center;padding:24px;display:flex;position:relative}.library-cover>span{white-space:pre-line;overflow-wrap:anywhere;padding-right:35px;font-family:Georgia,serif;font-size:24px;line-height:1.2}.library-cover>div{background:#ffffff30;border-radius:50%;place-items:center;width:36px;height:36px;display:grid;position:absolute;bottom:20px;right:20px}.library-cover small{opacity:.7;font-size:10px;position:absolute;bottom:15px;left:24px}.demo-cover{color:#e6efca;background:#244c3c}.library-details{padding:20px}.library-details h2{overflow-wrap:anywhere;padding-right:15px;font-size:15px;font-weight:550;line-height:1.5}.library-details p{color:var(--muted);margin-top:7px;font-size:11px}.library-details>.muted{font-size:10px}.lesson-progress{background:var(--line);border-radius:4px;height:3px;margin:20px 0 9px}.lesson-progress span{background:var(--accent);border-radius:4px;height:100%;display:block}.delete-lesson{position:absolute;bottom:10px;right:6px}.add-lesson-card{border:1px dashed var(--line);min-height:300px;color:var(--muted);background:0 0;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:16px;display:flex}.add-lesson-card strong{color:var(--ink);font-size:14px;font-weight:500}.add-lesson-card span{font-size:11px}.add-lesson-card:hover{background:var(--soft)}.collection-note{color:var(--muted);align-items:center;gap:8px;margin-top:27px;font-size:11px;line-height:1.8;display:flex}.word-search{max-width:440px;margin-bottom:25px;padding:12px}.word-search input{font-size:13px}.word-list{grid-template-columns:repeat(auto-fit,minmax(min(350px,100%),1fr));gap:15px;display:grid}.word-card{border:1px solid var(--line);background:var(--surface);border-radius:10px;align-items:flex-start;gap:15px;padding:22px;display:flex}.word-main{flex:1;min-width:0}.word-term{text-align:left;overflow-wrap:anywhere;background:0 0;font-family:Georgia,serif;font-size:24px}.word-main>p{margin-top:11px;font-size:13px;line-height:1.7}.word-main blockquote{border-left:2px solid var(--line);color:var(--muted);margin:15px 0 0;padding-left:10px;font-size:12px;line-height:1.7}.word-main>.source-label{display:block}.word-actions{flex-direction:column;gap:6px;display:flex}.modal{border:1px solid var(--line);background:var(--surface);width:min(540px,100% - 32px);max-height:calc(100dvh - 40px);color:var(--ink);box-shadow:var(--shadow);border-radius:15px;margin:auto;padding:25px;position:fixed;inset:0;overflow:auto}.modal::backdrop{-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#11221966}.modal-head{justify-content:space-between;align-items:center;gap:15px;margin-bottom:14px;display:flex}.modal-head h2{font-size:20px;font-weight:550}.modal-description{color:var(--muted);margin-bottom:22px;font-size:12px;line-height:1.9}.drop-zone{background:var(--light);color:var(--accent);border:1px dashed #9caf97;border-radius:11px;flex-direction:column;align-items:center;gap:12px;padding:30px 15px;display:flex}.drop-zone strong{font-size:14px;font-weight:500}.drop-zone>span{color:var(--muted);font-size:11px}.file-button{cursor:pointer;margin-top:6px;position:relative;overflow:hidden}.file-button input{opacity:0;cursor:pointer;width:100%;height:100%;position:absolute;inset:0}.file-button:focus-within{outline:2px solid var(--accent);outline-offset:3px}.import-file-list{margin-top:17px}.import-file-list>div{border-bottom:1px solid var(--line);color:var(--muted);align-items:center;gap:10px;padding:11px 0;font-size:12px;display:flex}.import-file-list span{overflow-wrap:anywhere;flex:1;min-width:0}.modal-actions{justify-content:space-between;align-items:center;gap:13px;margin-top:25px;display:flex}.inline-error{color:#b54139;background:#b5413910;border-radius:8px;margin-top:12px;padding:12px 14px;font-size:12px;line-height:1.8}.form-hint{color:var(--muted);margin-top:15px;font-size:11px;line-height:1.8}.setting-row{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:22px;padding:18px 0;display:flex}.setting-row strong{font-size:13px;font-weight:500;display:block}.setting-row span{color:var(--muted);margin-top:5px;font-size:11px;line-height:1.7;display:block}.backup-actions{flex-wrap:wrap;gap:10px;margin:18px 0;display:flex}.edit-original{background:var(--light);border-radius:9px;padding:16px;font-family:Georgia,serif;font-size:21px;line-height:1.7}.existing-annotations{flex-wrap:wrap;gap:8px;margin:15px 0;display:flex}.existing-annotations>span{background:var(--soft);border-radius:5px;align-items:center;gap:8px;padding:5px 8px;font-size:12px;display:flex}.existing-annotations button{color:var(--muted);background:0 0;padding:3px;display:flex}.field-label{flex-direction:column;gap:8px;margin-top:16px;font-size:12px;display:flex}.field-label input,.field-label select{background:var(--light);color:var(--ink);border:1px solid var(--line);border-radius:7px;min-width:0;max-width:100%;padding:10px 12px;font-size:14px}.toast{z-index:80;background:var(--ink);color:var(--surface);width:max-content;max-width:calc(100% - 30px);box-shadow:var(--shadow);border-radius:10px;align-items:center;gap:10px;padding:14px 17px;font-size:12px;line-height:1.7;display:flex;position:fixed;bottom:25px;left:50%;transform:translate(-50%)}.toast span{min-width:0}.toast button{color:inherit;background:0 0;padding:4px;display:flex}.empty-state{text-align:center;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:15px;padding:60px 25px;font-size:13px;line-height:1.8;display:flex}.empty-state h2{color:var(--ink);font-size:19px}.empty-state>span{font-size:12px}.welcome-empty{min-height:70vh}.welcome-empty h1{color:var(--ink)}.app-loading{min-height:100dvh;color:var(--accent);flex-direction:column;justify-content:center;align-items:center;gap:20px;font-size:13px;display:flex}.mobile-nav,.mobile-brand,.mobile-settings{display:none}.spin{animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (width>=1600px){.learning-grid{gap:32px}.learning-page{padding-top:40px}.sentence-english{font-size:18px}.current-sentence>p{font-size:28px}.transcript-scroll{height:620px}}@media (width<=1200px){.app-shell{grid-template-columns:176px minmax(0,1fr)}.sidebar{padding:28px 14px 18px}.brand{gap:7px;font-size:15px}.brand-mark{width:33px;height:37px}.brand small{font-size:8px}.learning-page,.collection-page{padding-left:24px;padding-right:24px}.topbar{padding:0 24px}.learning-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}.local-badge{display:none}.current-sentence{padding:17px}.current-sentence>p{font-size:21px}.speed-label>span{display:none}.playback-toolbar{gap:8px}.transport{gap:4px}.repeat-button{padding:8px;font-size:10px}.sentence-row{padding-left:15px;padding-right:15px}.panel-title{padding-left:16px;padding-right:16px}.sentence-english{font-size:15px}.footer-right{display:none}}@media (width<=1024px) and (width>=801px){.app-shell{grid-template-columns:74px minmax(0,1fr)}.sidebar{padding:25px 12px 20px}.brand{justify-content:center}.brand>span:last-child,.nav-caption,.sidebar-note,.sidebar-bottom>span,.sidebar-bottom button,.nav-arrow,.nav-count{display:none}.sidebar nav{margin-top:40px}.sidebar nav button{justify-content:center;gap:0;padding:14px;font-size:0}.sidebar nav button svg{width:20px;height:20px}.sidebar-bottom{margin-top:auto}.topbar{height:72px}.learning-page{padding-top:25px}h1{font-size:24px}}@media (width<=800px){.app-shell{display:block}.sidebar{display:none}.topbar{height:64px;padding:0 18px}.mobile-brand{color:var(--accent);display:inline-flex}.mobile-settings{display:inline-flex}.breadcrumb{gap:8px;font-size:11px}.top-actions{gap:7px}.import-top{min-height:36px;padding:8px 10px;font-size:11px}.learning-page{padding:22px 18px 105px}.lesson-heading{margin-bottom:19px}.eyebrow{letter-spacing:1.4px;margin-bottom:10px;font-size:8px}h1{font-size:25px}.lesson-info{gap:9px;font-size:10px}.lesson-info>span+span:before{margin-right:2px}.learning-grid{grid-template-columns:1fr;gap:23px}.video-column{display:contents}.video-stage{z-index:10;border-radius:10px;grid-row:1;position:sticky;top:0;box-shadow:0 4px 12px #15271915}.playback-toolbar{grid-row:2;gap:10px;margin-top:-14px;padding-top:0;padding-bottom:14px}.transport{gap:13px}.repeat-button{padding:10px 12px;font-size:12px}.speed-label select{padding:8px;font-size:13px}.current-sentence{display:none}.advanced-controls{grid-row:3;margin-top:-9px}.keyboard-hint,.demo-note{display:none}.transcript-panel{grid-row:4}.transcript-scroll{height:460px;max-height:60dvh}.sentence-english{font-size:17px;line-height:1.9}.sentence-row{padding:13px 18px 18px}.panel-title{padding:17px 18px 14px}.panel-title h2{font-size:15px}.panel-title p{font-size:11px}.transcript-tools{padding:0 16px 14px}.search input{font-size:14px}.search{padding:10px}.small-button{padding:9px 10px;font-size:12px}.sentence-actions .icon-button{opacity:1;width:32px;height:32px}.timestamp{font-size:11px}.now-playing{font-size:10px}.sentence-chinese{font-size:13px}.transcript-footer{font-size:10px}.category-filters label{font-size:12px}.mobile-nav{z-index:20;background:var(--surface);border-top:1px solid var(--line);padding:8px 0 calc(8px + env(safe-area-inset-bottom));justify-content:space-around;display:flex;position:fixed;bottom:0;left:0;right:0}.mobile-nav button{color:var(--muted);background:0 0;flex-direction:column;align-items:center;gap:4px;padding:3px 22px;font-size:10px;display:flex}.mobile-nav button.active{color:var(--accent)}.collection-page{padding:28px 18px 110px}.collection-heading{flex-direction:column;align-items:flex-start}.collection-heading h1{font-size:25px}.library-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.dictionary-drawer{width:calc(100% - 20px);max-height:calc(100dvh - 24px);padding-bottom:env(safe-area-inset-bottom);border-radius:20px}.dictionary-content{padding:28px 20px}.accent-pronunciations{gap:14px}.dictionary-word h2{font-size:27px}.dictionary-content h3,.source-label{font-size:11px}.toast{font-size:12px;bottom:90px}.reconnect-state{min-height:210px}.word-search{max-width:none}.modal{max-height:calc(100dvh - 30px);padding:20px}.form-hint{font-size:12px}.welcome-empty{min-height:65vh}}@media (width<=390px){.topbar{padding:0 12px}.breadcrumb{gap:5px}.breadcrumb>svg{display:none}.top-actions{gap:1px}.topbar .icon-button{width:31px}.learning-page{padding-left:12px;padding-right:12px}h1{font-size:23px}.transport{gap:6px}.repeat-button{padding:9px;font-size:11px}.lesson-info{gap:7px}.lesson-info>span:nth-child(4){display:none}.modal-actions{flex-wrap:wrap}.modal-head h2{font-size:18px}.sentence-english{font-size:16px}.collection-page{padding-left:14px;padding-right:14px}}@media (pointer:coarse){input,select,.search input,.field-label input,.field-label select{font-size:16px}.icon-button{min-width:40px;min-height:40px}.primary-button,.secondary-button,.small-button{min-height:44px}.sentence-actions .icon-button{min-width:36px;min-height:36px}.timestamp{min-height:36px}.plain-word,.marked-word{padding-top:3px;padding-bottom:3px}.mobile-nav button{min-width:64px;min-height:44px}.file-button{min-height:44px}.category-filters label,.text-button{min-height:36px}}@media (width>=801px) and (width<=1024px){.mobile-settings{display:inline-flex}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.spin{animation:none}}.import-tabs{border-bottom:1px solid var(--line);gap:8px;margin-bottom:18px;padding-bottom:14px;display:flex}.import-tabs button{color:var(--muted);background:0 0;border-radius:7px;padding:9px 18px;font-size:13px}.import-tabs button[aria-selected=true]{background:var(--soft);color:var(--accent)}.youtube-permission{align-items:flex-start;gap:10px;margin-top:20px;font-size:12px;line-height:1.8;display:flex}.youtube-permission input{flex-shrink:0;margin-top:3px}.youtube-progress{border:1px solid var(--line);background:var(--light);border-radius:9px;margin-top:18px;padding:15px;font-size:12px;line-height:1.7}.youtube-progress strong{overflow-wrap:anywhere;display:block}.youtube-progress p{color:var(--muted);margin:7px 0}.youtube-progress progress{width:100%;height:8px;accent-color:var(--accent);margin:12px 0;display:block}.youtube-progress>span{color:var(--muted);font-size:11px}.youtube-recent{border-top:1px solid var(--line);margin-top:25px;padding-top:18px}.youtube-recent h3{margin-bottom:10px;font-size:12px}.youtube-media-item{text-align:left;background:var(--light);border:1px solid var(--line);border-radius:8px;flex-direction:column;gap:6px;width:100%;margin-top:8px;padding:12px;display:flex}.youtube-media-item span{overflow-wrap:anywhere;font-size:13px}.youtube-media-item small{color:var(--muted);font-size:11px}.youtube-import>.modal-actions{justify-content:flex-end}.dictionary-drawer.dictionary-compact{width:min(560px,100% - 24px)}.dictionary-compact .dictionary-word h2{font-size:32px}.dictionary-compact .definition-cn{font-size:16px;font-weight:500}.dictionary-loading{color:var(--muted);margin-top:24px}.dictionary-attribution{margin-top:24px;font-size:12px}.dictionary-audio-error{color:#b34c35;font-size:13px;line-height:1.6}.dictionary-content h3 small{margin-left:8px;font-size:10px;font-weight:400}.usage-note small{opacity:.8;margin-top:4px;font-size:11px;display:block}.translation-status{color:var(--muted);background:var(--light);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:10px;padding:10px 16px;font-size:11px;line-height:1.6;display:flex}.translation-status .small-button{flex-shrink:0}.public-demo-notice{border:1px solid;border-radius:12px;margin:12px 24px 0;padding:12px 16px;font-size:13px;line-height:1.7}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}