.video-site{--green:#234b40;--paper:#faf8f3;--mint:#d8e7dc;--purple:#234b40;font-family:system-ui,-apple-system,'PingFang SC',sans-serif;background:var(--paper);color:#263d34}.video-site button,.video-site input,.video-site select,.video-site textarea{font-family:inherit}.video-site h1,.video-site h2,.video-site h3{font-family:Georgia,'Songti SC',serif}.video-site header{padding:20px 5%;background:var(--paper)}.video-site header nav{gap:22px}.video-site button{background:#234b40;border-color:#234b40;border-radius:10px;padding:10px 16px;min-height:44px}.video-site button:focus-visible,.video-site a:focus-visible{outline:3px solid #94b8a6;outline-offset:3px}.video-site .quiet{background:transparent;color:#345349;border:1px solid transparent}.video-site button:disabled{opacity:.45;cursor:default}.video-site h1{font-size:clamp(34px,4vw,56px);letter-spacing:.01em;margin:12px 0 20px}.library{padding-top:60px;padding-bottom:70px}.library-meta{display:flex;gap:20px;align-items:center;color:#6e7d73;font-size:14px;margin:30px 0 42px}.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.lesson-card{display:block;background:#fffdf9;border:1px solid #dce3da;border-radius:16px;overflow:hidden;transition:transform .2s}.lesson-card:hover{transform:translateY(-3px)}.lesson-cover{background:#e4ece3;height:185px;padding:30px;display:flex;align-items:center;justify-content:center;color:#59735d;position:relative}.lesson-cover:before{content:'✳';font-size:100px;font-weight:300;color:#8aa28c}.lesson-cover .cover-text{position:absolute;bottom:18px;left:24px;font:13px Georgia,serif;letter-spacing:3px}.lesson-card-body{padding:24px}.lesson-card h2{font-size:26px;margin:15px 0}.lesson-card p{font-size:14px;color:#6b796f}.lesson-card .enter{display:block;margin-top:26px;color:var(--green);font-weight:600}.import-box{margin-top:50px;border:1px solid #dde4dc;border-radius:12px;padding:22px;max-width:720px}.import-box input{margin-top:12px}.text-link{color:#245644;text-decoration:underline}.lesson-wrap{max-width:1300px;margin:auto;padding:30px 35px 230px}.lesson-heading{margin-bottom:30px}.back-link{font-size:13px;color:#728178}.lesson-heading .eyebrow{margin:20px 0 0}.lesson-heading h1{font-size:36px;margin:8px 0 12px}.lesson-heading p{color:#6d7a70;max-width:900px;font-size:14px}.lesson-meta{display:flex;gap:18px;align-items:center;flex-wrap:wrap;font-size:12px;color:#778277}.learning-grid{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);gap:35px}.learning-grid>*{min-width:0}.video-column{position:sticky;top:24px;align-self:start}.video-frame{position:relative;overflow:hidden;border-radius:16px;background:#172d23;aspect-ratio:16/9}.video-frame video{width:100%;height:100%;display:block;object-fit:contain}.video-caption{position:absolute;bottom:46px;left:12px;right:12px;text-align:center;color:white;font-size:17px;line-height:1.5;pointer-events:none;text-shadow:0 2px 6px #000}.video-caption span{display:inline-block;background:#10291bc9;padding:2px 9px;border-radius:3px}.video-caption small{display:block;font-size:13px}.progress-card{border:1px solid #dce3d9;border-radius:12px;padding:20px;margin:20px 0;background:#fffdf8}.progress-card>div{display:flex;justify-content:space-between;gap:10px}.progress-card strong{font-size:13px;font-weight:500}.progress-card progress{appearance:none;width:100%;height:5px;border:0;margin-top:14px;border-radius:5px;overflow:hidden}.progress-card progress::-webkit-progress-bar{background:#e5eae2}.progress-card progress::-webkit-progress-value{background:#698f7b}.progress-card p{font-size:12px;color:#728071;margin:8px 0 0}.local-media{font-size:13px;border:0}.source-note{font-size:11px;line-height:1.8;color:#889185}.transcript-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;gap:10px}.transcript-heading h2{font-size:24px;margin:0}.transcript-heading button{font-size:12px;padding:5px 8px}.sentences{position:relative;display:flex;flex-direction:column;gap:12px;max-height:610px;overflow:auto;padding:3px 5px 25px 0;scroll-padding:10px}.sentence-card{background:#fffefa;border:1px solid #e0e4dc;border-radius:12px;padding:18px 20px;position:relative;transition:background .2s,border-color .2s}.sentence-card.active{background:#fff0c5;border-color:#e4d49e}.sentence-top{display:flex;justify-content:space-between;align-items:center;height:25px;margin-bottom:7px}.sentence-time{color:#899084;font:12px ui-monospace,monospace}.sentence-card.active .sentence-time{color:#a98c36}.video-site .sentence-save{color:#829081;padding:0;width:34px;min-height:32px;background:#ffffffaa;border:0;border-radius:50%;font-size:20px}.video-site .sentence-save.saved{color:#b0923f}.sentence-en{font-size:20px;line-height:1.65;margin:0;font-weight:550;overflow-wrap:anywhere;cursor:pointer}.sentence-zh{font-family:'Songti SC',serif;color:#7b8070;font-size:16px;margin:7px 0 0;line-height:1.6;overflow-wrap:anywhere}.video-site button.term{font-size:inherit;line-height:inherit;font-weight:inherit;font-family:inherit;padding:0 1px;min-height:0;display:inline;border:0;border-radius:0;background:linear-gradient(transparent 75%,#abd5b0 75%,#abd5b0 92%,transparent 92%);color:inherit;text-align:inherit;cursor:pointer}.video-site button.sentence-jump{font-size:12px;color:#637866;background:none;border:0;padding:0;min-height:25px}.player-dock{position:fixed;bottom:0;left:0;right:0;background:#fffefaeb;backdrop-filter:blur(14px);border-top:1px solid #e1e6dc;padding-bottom:env(safe-area-inset-bottom);z-index:20;box-shadow:0 -5px 25px #243b2810}.dock-inner{max-width:740px;margin:auto;padding:10px 25px 12px}.tool-row{display:flex;justify-content:space-between;gap:4px}.video-site .tool-row button{background:none;color:#546b5c;border:none;border-radius:6px;padding:3px 4px;min-width:0;display:flex;flex-direction:column;align-items:center;gap:2px}.tool-row button>span{font-size:21px;font-family:system-ui,sans-serif;height:28px}.tool-row small{font-size:11px;white-space:nowrap}.seek-row{display:flex;align-items:center;gap:14px;font:12px ui-monospace,monospace;color:#6a8873;margin:5px 0}.seek-row input{width:100%;margin:0;padding:0;accent-color:#709c80;min-width:0;height:25px;border:0;background:transparent}.transport-row{display:flex;justify-content:space-around;align-items:center;gap:8px}.transport-row small{font-size:11px}.video-site .play-button{width:52px;height:52px;border-radius:50%;padding:0;font-size:21px;background:#3c7559;border:0;box-shadow:0 4px 12px #46725825}.video-site .transport-row button[aria-pressed=true]{background:#dceade;color:#255b3b}.video-site dialog{width:min(600px,calc(100% - 24px));max-width:600px;max-height:85dvh;overflow:auto;border:1px solid #ced9cc;background:#fffefa;padding:25px;border-radius:18px;color:var(--ink)}.panel-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:15px}.panel-top h2{font-size:26px;margin:0}.panel-top button{padding:0 10px}.panel-note{font-size:13px;color:#728071}.vocab-item,.saved-item{padding:16px 0;border-bottom:1px solid #e1e5da;display:flex;justify-content:space-between;gap:14px;align-items:center}.vocab-item strong{font-size:18px}.vocab-item p{font-size:14px;margin:5px 0;color:#6d786e}.video-site .mini-button{font-size:12px;padding:4px 12px;background:transparent;color:#365343;border:1px solid #ccdacc;white-space:nowrap}.flash-card{width:100%;background:#e8efe3!important;color:#234b40!important;padding:50px 20px!important;font-size:28px;font-family:Georgia,'Songti SC',serif!important;min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px}.flash-card small{font-family:system-ui,sans-serif;font-size:13px;color:#748370}.flash-controls{display:flex;justify-content:space-between;gap:10px;margin-top:20px;flex-wrap:wrap}.panel-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:20px}.video-site .panel-tabs button{font-size:12px;padding:6px 10px;background:#edf0e7;color:#5b705d;border:0}.panel-tabs button.active{background:#2e5945!important;color:white!important}.exercise-prompt{font-size:17px;margin:20px 0}.answer-options{display:flex;flex-direction:column;gap:10px;margin:18px 0}.video-site .answer-option{background:white;color:#3b5144;border:1px solid #d6dfd3;text-align:left}.answer-option.selected{background:#e1ecdd!important;border-color:#618266!important}.token-bank,.token-answer{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0;min-height:50px}.token-answer{border:1px dashed #abbba6;border-radius:10px;padding:12px;background:#f5f6ee}.video-site .token-bank button,.video-site .token-answer button{background:white;border-color:#ccdac7;color:#405b46;padding:5px 12px}.exercise-result{border-radius:10px;padding:14px;background:#f7e5df;color:#864b40;margin:16px 0;font-size:14px}.exercise-result.correct{background:#e5efe0;color:#3a6543}.video-site textarea{width:100%;min-height:100px;resize:vertical;padding:12px;border:1px solid #becdb8;border-radius:10px;font-size:17px}.record-target{padding:20px;background:#eef1e7;border-radius:10px;font-size:20px}.record-actions{display:flex;gap:10px;flex-wrap:wrap;margin:20px 0}.record-audio{width:100%;margin:15px 0}.toast{position:fixed;bottom:205px;left:50%;transform:translateX(-50%);background:#274c3feb;color:white;padding:10px 18px;max-width:90%;border-radius:8px;z-index:100;font-size:13px;box-shadow:0 4px 15px #0002}.retry{margin-left:12px}.video-site #media-status{font-size:13px;color:#8b6750;margin:10px 0}.video-site #load-status{padding:20px;background:#eff2e8;border-radius:12px}.video-site [hidden]{display:none!important}@media(max-width:760px){.video-site header{padding:15px 18px;gap:12px}.video-site header .logo{font-size:20px}.video-site header nav{font-size:12px;gap:16px}.library{padding-top:35px}.library-meta{flex-wrap:wrap;gap:12px}.lesson-grid{grid-template-columns:1fr}.lesson-wrap{padding:18px 14px 225px}.lesson-heading{margin-bottom:20px}.lesson-heading h1{font-size:27px}.learning-grid{grid-template-columns:minmax(0,1fr);gap:22px}.video-column{position:static}.video-frame{border-radius:12px}.video-caption{font-size:16px;bottom:45px}.progress-card{padding:14px;margin:14px 0}.source-note{margin:6px 0}.local-media{padding:9px 0}.transcript-heading h2{font-size:22px}.sentences{max-height:420px;overflow:auto;padding-right:0;position:relative}.sentence-card{padding:15px 17px}.sentence-en{font-size:19px}.sentence-zh{font-size:15px}.dock-inner{padding:8px 12px 10px}.transport-row{gap:0}.transport-row button{padding:6px 9px}.transport-row small{font-size:10px}.video-site dialog{padding:20px}.tool-row small{font-size:10px}.toast{bottom:195px}.lesson-meta{gap:9px}.lesson-heading p{font-size:12px}}

.lesson-about{border:0;padding:0 0 12px;font-size:12px;color:#7c877b}.lesson-about summary{font-weight:400}.lesson-about p{margin:8px 0}.source-note{padding:8px 0;border:0}.source-note summary{font-weight:400}@media(max-width:760px){.learning-grid{display:flex;flex-direction:column;gap:12px}.video-column{display:contents}.video-frame{order:0;flex-shrink:0;width:100%}.video-column>#media-status{order:1}.transcript-column{order:2}.progress-card{order:3}.local-media{order:4}.video-column>.source-note{order:5}.lesson-heading .eyebrow{margin-top:10px}.lesson-heading h1{margin-bottom:8px}.lesson-heading{margin-bottom:14px}.sentence-en{font-size:18px}}