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span.complete{background:var(--accent);border-color:var(--accent);color:var(--color-background)}.onboarding-coach-action{background:var(--accent);min-height:38px;color:var(--color-background);border:0;border-radius:8px;justify-self:start;padding:0 14px;font-weight:800}.onboarding-highlight{z-index:1100;outline-offset:-2px;position:relative;outline:2px solid var(--text-main)!important;box-shadow:0 0 0 4px var(--accent-bg), 0 0 0 6px var(--accent-border), var(--shadow-lg)!important}.onboarding-header,.onboarding-progress,.onboarding-footer{width:min(720px,100%);margin:0 auto}.onboarding-header{justify-content:space-between;align-items:center;gap:16px;display:flex}.onboarding-brand{align-items:center;gap:10px;font-weight:800;display:inline-flex}.onboarding-skip,.onboarding-danger-btn{cursor:pointer;border:0;place-items:center;display:inline-grid}.onboarding-skip{width:38px;height:38px;color:var(--muted-text);background:var(--surface-raised);border-radius:999px}.onboarding-progress{grid-template-columns:repeat(6,minmax(0,1fr));gap:6px;padding:18px 0 10px;display:grid}.onboarding-progress-step{min-width:0;color:var(--muted-text);flex-direction:column;align-items:center;gap:5px;font-size:11px;display:flex}.onboarding-progress-step span{background:var(--surface-raised);border:1px solid var(--border);border-radius:999px;place-items:center;width:24px;height:24px;font-size:12px;font-weight:800;display:inline-grid}.onboarding-progress-step small{text-overflow:ellipsis;white-space:nowrap;max-width:100%;overflow:hidden}.onboarding-progress-step.active{color:var(--text)}.onboarding-progress-step.active span{background:var(--accent);border-color:var(--accent);color:var(--accent-contrast)}.onboarding-body{flex:1;align-items:center;width:min(720px,100%);margin:0 auto;padding:16px 0;display:grid}.onboarding-panel{gap:20px;display:grid}.onboarding-panel-copy{gap:8px;display:grid}.onboarding-panel-copy h1{letter-spacing:0;margin:0;font-size:clamp(28px,8vw,48px);line-height:1}.onboarding-panel-copy p{color:var(--muted-text);margin:0;font-size:16px;line-height:1.45}.onboarding-video-card,.onboarding-saved-card,.onboarding-flashcard,.onboarding-subtitle-card,.onboarding-toolbar-demo,.onboarding-loop-demo{background:var(--surface-raised);border:1px solid var(--border);box-shadow:var(--shadow-soft)}.onboarding-video-card{text-align:left;color:inherit;cursor:pointer;border-radius:8px;grid-template-columns:132px minmax(0,1fr) auto;align-items:center;gap:14px;padding:12px;display:grid}.onboarding-video-thumb{aspect-ratio:16/9;color:#fff;background:#111827;border-radius:6px;place-items:center;display:grid;position:relative;overflow:hidden}.onboarding-video-thumb img{object-fit:cover;opacity:.82;width:100%;height:100%;position:absolute;inset:0}.onboarding-video-thumb svg{z-index:1;filter:drop-shadow(0 4px 12px #00000073);position:relative}.onboarding-video-copy{gap:6px;min-width:0;display:grid}.onboarding-video-copy strong{font-size:17px}.onboarding-video-copy 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0}.onboarding-sentence-translation{color:var(--muted-text)}.onboarding-word-popup{border:1px solid var(--border);background:var(--surface);border-radius:8px;justify-self:start;gap:6px;min-width:176px;padding:12px;display:grid}.onboarding-word-popup strong{font-size:30px}.onboarding-primary-btn,.onboarding-complete-btn,.onboarding-tool-btn,.onboarding-grade-row button{cursor:pointer;border:0;border-radius:8px;font-weight:800}.onboarding-primary-btn,.onboarding-complete-btn{background:var(--accent);min-height:42px;color:var(--accent-contrast);justify-content:center;align-items:center;gap:8px;width:fit-content;padding:0 14px;display:inline-flex}.onboarding-tool-btn{background:var(--surface-raised);border:1px solid var(--border);min-height:48px;color:var(--text);align-items:center;gap:8px;width:fit-content;padding:0 14px;display:inline-flex}.onboarding-tool-btn.active{background:color-mix(in srgb, var(--accent) 18%, var(--surface-raised));border-color:var(--accent)}.onboarding-mode-preview,.onboarding-loop-wave{border:1px solid var(--border);background:var(--surface);border-radius:8px;padding:16px}.onboarding-mode-preview{gap:6px;display:grid}.onboarding-mode-preview strong{font-size:26px}.onboarding-mode-preview span,.onboarding-mode-preview small{color:var(--muted-text)}.onboarding-loop-demo,.onboarding-toolbar-demo{border-radius:8px;padding:16px}.onboarding-loop-wave{align-items:center;gap:10px;height:92px;display:flex}.onboarding-loop-wave span{background:color-mix(in srgb, var(--accent) 60%, var(--surface));border-radius:999px;flex:1;height:10px}.onboarding-loop-wave span:nth-child(2){height:34px}.onboarding-loop-wave span:nth-child(3){height:56px}.onboarding-saved-list{gap:10px;display:grid}.onboarding-saved-card{border-radius:8px;justify-content:space-between;align-items:center;gap:16px;padding:14px;display:flex}.onboarding-saved-card div{gap:3px;display:grid}.onboarding-saved-card strong{font-size:28px}.onboarding-saved-card div span:last-child{color:var(--muted-text)}.onboarding-danger-btn{background:color-mix(in srgb, #ef4444 14%, var(--surface-raised));color:#ef4444;border-radius:8px;width:40px;height:40px}.onboarding-flashcard{text-align:center;border-radius:8px;align-content:center;place-items:center;gap:18px;min-height:320px;padding:22px;display:grid}.onboarding-flashcard-top{color:var(--muted-text);align-items:center;gap:8px;display:inline-flex}.onboarding-flashcard>strong{font-size:68px;line-height:1}.onboarding-flashcard-answer{color:var(--muted-text);gap:4px;font-size:18px;display:grid}.onboarding-grade-row{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;width:min(360px,100%);display:grid}.onboarding-grade-row button{background:var(--surface);border:1px solid var(--border);min-height:44px;color:var(--text)}.onboarding-footer{justify-content:center;min-height:44px;display:flex}@media (width<=560px){.onboarding-screen{padding-left:14px;padding-right:14px}.onboarding-progress{gap:4px}.onboarding-progress-step small{display:none}.onboarding-video-card{grid-template-columns:112px minmax(0,1fr)}.onboarding-video-card>svg{display:none}.onboarding-panel-copy h1{font-size:34px}}.study-toolbar{border-bottom:1px solid var(--color-border);background:var(--color-background);z-index:5;flex-direction:row;justify-content:center;align-items:center;gap:8px;padding:12px 16px;display:flex;overflow:hidden}.view-video .main-content{min-height:0}.study-toolbar-inline{justify-content:center;align-items:center;gap:6px;width:100%;display:flex;position:relative}.speed-group,.toolbar-middle-group,.study-actions,.bank-summary,.home-meta-row,.recent-header{align-items:center;gap:var(--space-sm);display:flex}.toolbar-label{color:var(--text-muted);align-items:center;gap:6px;font-size:.85rem;font-weight:500;display:inline-flex}.toolbar-badge{cursor:default;pointer-events:none;flex-shrink:0}.study-toolbar .mini-btn{white-space:nowrap;min-width:0}.speed-group{flex-wrap:nowrap;flex:1 1 0;min-width:0;position:absolute;left:0}.study-actions{flex-wrap:nowrap;flex:1 1 0;justify-content:flex-end;min-width:0}.speed-group .mini-btn{flex:none;justify-content:center;padding-left:8px;padding-right:8px}.toolbar-cycle-btn{min-width:62px}.subtitle-timing-readout{min-width:76px}.toolbar-middle-group{justify-content:center;align-items:center;gap:6px;display:flex}.toolbar-middle-group 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.player-section,html.native-bilibili-html-overlay-active .video-container,html.native-bilibili-html-overlay-active .native-bilibili-wrapper.native-bilibili-active{background:0 0!important}.local-video-loading{color:#ffffffb8;background:#050505;place-items:center;width:100%;height:100%;min-height:220px;font-size:.9rem;font-weight:600;display:grid}.youtube-wrapper iframe{border:none;width:100%;height:100%}.youtube-player-fallback{color:#fff;text-align:center;z-index:2;background:#000000e0;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:18px;display:flex;position:absolute;inset:0}.youtube-player-fallback p{color:#ffffffdb;max-width:30rem;margin:0;font-size:.95rem;line-height:1.45}.youtube-player-fallback button{color:#111;background:#fff;border:1px solid #ffffff3d;border-radius:8px;padding:9px 14px;font-weight:700}.bilibili-player-note{text-align:left;background:#000000b8;border-radius:8px;align-items:flex-start;gap:8px;padding:10px 12px;inset:auto 12px 12px}.bilibili-player-note p{font-size:.8rem}.bilibili-player-note button{padding:6px 10px;font-size:.8rem}.subtitles-section{min-height:0;padding:18px 14px var(--space-lg);background:var(--color-background);scrollbar-width:thin;scrollbar-color:var(--color-surface-hover) transparent;flex:1;padding-bottom:100px;scroll-padding-top:14px;scroll-padding-bottom:100px;overflow-y:auto}.subtitles-section::-webkit-scrollbar{width:6px}.subtitles-section::-webkit-scrollbar-thumb{background-color:var(--color-surface-hover);border-radius:6px}.subtitle-list{flex-direction:column;gap:12px;padding-top:2px;display:flex}.bank-summary{flex-wrap:wrap;margin-bottom:12px}.player-session-summary{border:1px solid var(--color-border);background:var(--color-surface);border-radius:14px;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-bottom:12px;display:grid;overflow:hidden}.session-summary-item{background:var(--color-background);flex-direction:column;justify-content:center;align-items:center;gap:2px;min-width:0;padding:10px 6px;display:flex}.session-summary-item strong{color:var(--text-main);font-size:1rem;line-height:1}.session-summary-item span{color:var(--text-muted);text-transform:uppercase;font-size:.72rem;font-weight:700}.subtitle-report{flex-direction:column;align-items:flex-start;gap:8px;margin-bottom:12px;display:flex}.subtitle-report-toggle{border:1px solid var(--color-border);background:var(--color-surface);color:var(--text-muted);cursor:pointer;border-radius:8px;padding:7px 10px;font-size:.82rem;font-weight:600;transition:background .18s,border-color .18s,color .18s}.subtitle-report-toggle:hover{background:var(--color-surface-hover);border-color:var(--accent-border);color:var(--text-main)}.subtitle-report-status{color:#86efac;font-size:.82rem;font-weight:600}.subtitle-report-form{flex-direction:column;gap:8px;width:min(100%,520px);display:flex}.subtitle-report-form label{color:var(--text-main);font-size:.86rem;font-weight:600}.subtitle-report-form textarea{resize:vertical;border:1px solid var(--color-border);background:var(--color-surface);width:100%;min-height:78px;color:var(--text-main);font:inherit;border-radius:8px;padding:10px 12px;line-height:1.4}.subtitle-report-form textarea:focus{border-color:var(--accent-border);outline:none}.subtitle-report-footer{justify-content:space-between;align-items:center;gap:8px;width:100%;display:flex}.subtitle-report-count,.subtitle-report-error{color:var(--text-muted);font-size:.78rem}.subtitle-report-count.is-over,.subtitle-report-error{color:#fca5a5}.subtitle-report-error{margin:0}.subtitle-report-submit{border:1px solid var(--accent-border);background:var(--accent-bg);color:var(--text-main);cursor:pointer;border-radius:8px;min-width:72px;padding:7px 12px;font-size:.82rem;font-weight:700}.subtitle-report-submit:disabled{cursor:not-allowed;opacity:.55}.vocab-pill{align-items:center;gap:var(--space-sm);background:var(--color-surface);border:1px solid var(--color-border);border-radius:10px;min-width:0;max-width:100%;padding:6px 10px;font-size:.85rem;font-weight:500;display:inline-flex}.vocab-pill-inline{flex:0 auto;margin-bottom:0}.vocab-pill-zh{color:var(--hanzi-color);flex-shrink:0;font-family:Noto Sans SC,system-ui,sans-serif}.vocab-pill-en{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;min-width:0;overflow:hidden}.vocab-pill-delete{width:20px;height:20px;color:var(--text-muted);cursor:pointer;background:#ffffff0d;border:none;border-radius:6px;justify-content:center;align-items:center;line-height:1;transition:all .2s;display:flex}.vocab-pill-delete:hover{color:#fca5a5;background:#ef444433}.transcript-error{color:var(--text-main);background:var(--color-surface);border:1px solid var(--color-border);max-width:32rem;padding:var(--space-lg);box-shadow:var(--shadow-sm);border-radius:16px;margin-left:auto;margin-right:auto;line-height:1.5}.bilibili-login-prompt{justify-items:center;gap:12px;display:grid}.bilibili-login-prompt p{margin:0}.bilibili-login-prompt button{border:1px solid var(--color-border);background:var(--text-main);color:var(--color-background);border-radius:10px;padding:10px 14px;font-weight:700}.bilibili-login-prompt button:disabled{opacity:.6}.bilibili-login-prompt span{color:#fca5a5;font-size:.82rem}.transcript-warning{color:#fbbf24;background:#fbbf241a;border:1px solid #fbbf2433;border-radius:10px;align-items:center;gap:6px;margin-bottom:10px;padding:10px 12px;font-size:.82rem;line-height:1.4;display:flex}.transcript-warning.info{color:#60a5fa;background:#60a5fa1a;border-color:#60a5fa33}.subtitle-card{--sentence-card-scale:1;background:var(--color-surface);border-radius:calc(16px * var(--sentence-card-scale));padding:calc(12px * var(--sentence-card-scale)) calc(12px * var(--sentence-card-scale)) calc(12px * var(--sentence-card-scale)) calc(14px * var(--sentence-card-scale));cursor:pointer;border:1px solid var(--color-border);align-items:flex-start;gap:calc(10px * var(--sentence-card-scale));content-visibility:auto;contain-intrinsic-size:120px;contain:layout style;width:100%;scroll-margin-top:14px;scroll-margin-bottom:24px;transition:all .2s;display:flex;position:relative;overflow:visible}.subtitle-card-content{flex-direction:column;flex:1;min-width:0;display:flex}.subtitle-card:active{transform:scale(.99)}@media (hover:hover) and (pointer:fine){.subtitle-card:hover{border-color:var(--color-primary);background:var(--color-surface-hover)}}.subtitle-card.active{background:var(--color-surface-hover);border-color:var(--color-primary);box-shadow:var(--shadow-sm)}.subtitle-card.active:before{content:"";width:calc(4px * var(--sentence-card-scale));background:var(--color-primary);border-radius:calc(15px * var(--sentence-card-scale)) 0 0 calc(15px * var(--sentence-card-scale));position:absolute;top:0;bottom:0;left:0}.seek-btn{background:var(--accent-bg);color:var(--text-main);width:calc(28px * var(--sentence-card-scale));height:calc(28px * var(--sentence-card-scale));border:1px solid var(--accent-border);cursor:pointer;opacity:1;z-index:2;border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:flex}.subtitle-card-actions{gap:calc(6px * var(--sentence-card-scale));flex-direction:column;flex-shrink:0;display:flex}@media (hover:hover) and (pointer:fine){.seek-btn:hover{background:var(--accent-hover);color:var(--text-main);border-color:var(--accent-border);transform:scale(1.05)}}.seek-btn.loop-btn.active,.seek-btn.save-sub-btn.active,.seek-btn.loop-toggle-btn.active,.seek-btn.loop-count-btn.active{background:var(--accent-hover);border-color:var(--text-muted);box-shadow:0 0 0 1px var(--text-muted);opacity:1}.loop-count-label{font-size:.75rem;font-weight:600;line-height:1}.loop-count-label.is-infinite{justify-content:center;align-items:center;display:inline-flex}.loop-infinity-icon{width:15px;height:15px}.words-container{margin-bottom:calc(2px * var(--sentence-card-scale));flex-wrap:wrap;gap:1px;display:flex;overflow:visible}.listening-placeholder{background:var(--color-surface);border:1px solid var(--color-border);color:var(--text-muted);cursor:pointer;font:inherit;border-radius:10px;justify-content:center;align-items:center;width:100%;min-height:44px;padding:10px 12px;font-size:.88rem;font-weight:700;display:flex}.listening-placeholder:hover{background:var(--color-surface-hover);border-color:var(--accent-border);color:var(--text-main)}.sentence-translation{font-size:calc(.9rem * var(--sentence-card-scale));color:var(--text-muted);margin-top:calc(3px * var(--sentence-card-scale));padding-left:calc(2px * var(--sentence-card-scale));line-height:1.3}.sentence-pinyin{font-size:calc(.92rem * var(--sentence-card-scale));color:var(--text-muted);margin-bottom:calc(6px * var(--sentence-card-scale));padding-left:calc(2px * var(--sentence-card-scale));line-height:1.4}.word-block{padding:calc(2px * var(--sentence-card-scale)) calc(2px * var(--sentence-card-scale));border-radius:calc(10px * 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