:root{--paper:#f7f5ef;--card:#fffefa;--ink:#203632;--muted:#687570;--line:#dce1d8;--accent:#266a59;--soft:#e8f0e8;--warm:#ae744b;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-underline-offset:4px}button,input,select,textarea{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}:focus-visible{outline:3px solid #a6ccba;outline-offset:3px}[hidden]{display:none!important}.skip{position:absolute;top:-80px;left:16px;background:var(--card);padding:12px;z-index:10}.skip:focus{top:12px}.topbar{max-width:1180px;margin:auto;padding:28px 36px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-weight:700;letter-spacing:.08em;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:10px}.mark{font-size:24px;background:var(--soft);border-radius:12px;display:grid;place-items:center;width:38px;height:38px}.edition{font-size:12px;color:var(--muted);letter-spacing:.08em}main{max-width:1180px;padding:0 36px;margin:auto}.hero{max-width:730px;padding:56px 0 30px}.eyebrow{font-size:11px;font-weight:600;letter-spacing:.14em;color:var(--accent);margin:0 0 14px}h1{font-size:52px;line-height:1.28;font-weight:650;letter-spacing:-.025em;margin:0 0 20px}h2{font-size:25px;font-weight:620;margin:0 0 8px}h3{font-size:16px;font-weight:650}p{line-height:1.8}.intro{max-width:590px;font-size:15px;color:var(--muted);margin:0 0 26px}.stats{display:flex;gap:40px}.stat strong{display:block;font-size:26px;font-weight:600;line-height:1.4}.stat span{font-size:12px;color:var(--muted)}.progress-note{font-size:12px;color:var(--muted);margin:20px 0 0}.tabs{display:flex;gap:30px;border-bottom:1px solid var(--line);margin:16px 0 34px;position:sticky;top:0;background:var(--paper);z-index:3}.tabs a{display:flex;gap:8px;align-items:center;padding:16px 0;font-size:14px;font-weight:600;text-decoration:none;color:var(--muted);border-bottom:2px solid transparent}.tabs a[aria-current=page]{border-color:var(--accent);color:var(--accent)}.tabs span{font-size:10px;padding:3px 6px;border-radius:4px;background:#eaece5;font-weight:400}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:22px}.section-heading .eyebrow{margin-bottom:8px}.button{display:inline-flex;justify-content:center;align-items:center;gap:6px;min-height:38px;background:var(--accent);color:white;border:1px solid var(--accent);border-radius:7px;padding:9px 14px;text-decoration:none;font-size:12px;font-weight:600}.button.secondary{background:transparent;border-color:var(--line);color:var(--ink)}.button:hover{filter:brightness(.97)}.filters{display:grid;grid-template-columns:1fr 230px 150px;gap:15px}label{font-size:12px;color:var(--muted);display:block}select,input[type=search],textarea{width:100%;border:1px solid var(--line);border-radius:7px;background:var(--card);color:var(--ink);padding:11px 12px;margin-top:7px;outline-offset:2px}select{height:43px}.search{position:relative}.small{font-size:12px;color:var(--muted)}.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.video-card{border:1px solid var(--line);border-radius:12px;background:var(--card);padding:20px;display:flex;flex-direction:column;min-height:235px;position:relative}.video-card.seed{border-color:#8bb9a5}.video-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:14px}.badge{display:inline-flex;font-size:10px;padding:4px 7px;background:var(--soft);color:var(--accent);border-radius:4px}.badge.variant{background:#f2ebe1;color:#906c46}.video-card h3{font-size:17px;line-height:1.55;margin:0 0 10px;font-weight:600}.video-meta{font-size:11px;color:var(--muted);line-height:1.7;margin:0 0 12px}.status-label{font-size:11px;color:var(--warm);margin:auto 0 14px;display:flex;align-items:center;gap:6px}.status-label:before{content:"";height:5px;width:5px;border-radius:50%;background:var(--warm)}.card-actions{display:flex;gap:10px;align-items:center}.card-actions a,.card-actions button{font-size:11px}.card-actions .button{padding:7px 10px;min-height:31px}.bookmark{background:none;border:0;color:var(--muted);padding:6px 0;margin-left:auto}.bookmark[aria-pressed=true]{color:var(--accent)}details{font-size:11px;color:var(--muted);margin-bottom:14px}summary{cursor:pointer}details p{overflow-wrap:anywhere;margin:8px 0 0}.info{font-size:13px;padding:16px 18px;background:var(--soft);border-radius:8px;margin:0 0 24px;color:#49685b}.practice-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:28px}.exercise-list{display:flex;flex-direction:column;gap:8px;margin-top:16px}.exercise-item{width:100%;text-align:left;padding:14px;border:1px solid transparent;border-radius:8px;color:var(--ink);background:transparent;line-height:1.6;font-size:12px}.exercise-item:hover{background:#eef0e8}.exercise-item[aria-pressed=true]{background:var(--card);border-color:var(--line)}.exercise-item small{display:block;font-size:10px;color:var(--muted);margin-bottom:4px}.exercise-detail{background:var(--card);border:1px solid var(--line);padding:28px;border-radius:12px;min-height:430px}.exercise-detail h3{font-size:22px;line-height:1.5;margin:14px 0}.context{font-size:13px;color:var(--muted)}.bubble{background:var(--soft);padding:20px;border-radius:10px;margin:20px 0;color:var(--ink);font-size:19px;line-height:1.6}.bubble small{display:block;color:var(--accent);font-size:10px;margin-bottom:8px}.answer-input{resize:vertical;min-height:88px}.answer-buttons{display:flex;gap:10px;margin-top:12px}.answer{margin-top:26px;border-top:1px solid var(--line);padding-top:24px;font-size:14px}.answer h4{font-size:11px;color:var(--accent);letter-spacing:.06em;margin:18px 0 7px}.answer p{margin:0 0 10px}.sample-response{font-size:18px;line-height:1.7!important}.source-related{font-size:11px;border-top:1px dashed var(--line);padding-top:18px;margin-top:22px}.source-related a{display:block;margin-top:8px}.empty{text-align:center;padding:40px 20px;color:var(--muted);border:1px dashed var(--line);border-radius:10px;font-size:13px;line-height:1.9;grid-column:1/-1}.notebook-controls{display:grid;grid-template-columns:1fr auto auto;gap:14px;align-items:end}.import-button{height:43px;cursor:pointer}.import-button input{position:absolute;width:1px;height:1px;opacity:0}.import-button:focus-within{outline:3px solid #a6ccba;outline-offset:3px}.notebook-controls .button{height:43px}.note-editor{margin-top:20px}.note-editor textarea{resize:vertical}.role-legend{display:flex;gap:8px;margin-top:20px;flex-wrap:wrap}.role-legend span{font-size:10px;color:var(--muted);background:#eeefe8;border-radius:4px;padding:5px 8px}.transcript-search{max-width:440px;margin:16px 0 20px}.transcript-row{display:grid;grid-template-columns:66px 120px minmax(0,1fr);gap:16px;padding:18px 16px;border-bottom:1px solid var(--line);border-left:3px solid transparent;background:var(--card)}.transcript-row[data-speaker=commentary]{background:#edf2eb;border-left-color:var(--accent)}.transcript-row[data-speaker=other]{border-left-color:#adbcd7}.time-link{font-size:11px;font-variant-numeric:tabular-nums;padding-top:12px}.speaker-select{font-size:11px;margin-top:0;height:36px;padding:6px}.transcript-content p{margin:6px 0 10px;font-size:14px;white-space:pre-wrap;line-height:1.65}.transcript-content input{width:100%;border:none;border-bottom:1px dashed var(--line);background:transparent;padding:6px 0;color:var(--muted);font-size:11px}.method{border-top:1px solid var(--line);margin-top:64px;padding:34px 0 38px;display:grid;grid-template-columns:1fr 1fr;gap:58px;scroll-margin-top:70px}.method h2{font-size:23px}.method p{font-size:12px;color:var(--muted)}.method h3{margin-top:0}footer{max-width:1180px;padding:24px 36px 36px;margin:auto;font-size:10px;color:var(--muted);border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;padding:12px 20px;border-radius:8px;font-size:12px;z-index:5;max-width:90vw}.notebook-hint{font-size:12px;color:var(--muted)}
@media(max-width:900px){.video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.practice-layout{grid-template-columns:220px minmax(0,1fr)}.filters{grid-template-columns:1fr 200px}.filters label:last-child{grid-column:2}.filters .search{grid-row:span 2}.method{gap:28px}}
@media(max-width:640px){.topbar{padding:20px}.edition{font-size:9px}.brand{font-size:13px}.mark{width:30px;height:30px;font-size:20px}main{padding:0 20px}.hero{padding:36px 0 20px}h1{font-size:38px}.intro{font-size:13px}.stats{gap:24px}.stat strong{font-size:23px}.tabs{gap:22px;margin-bottom:26px}.tabs a{font-size:12px}.tabs span{font-size:9px}.video-grid{grid-template-columns:1fr}.filters{grid-template-columns:1fr 1fr}.filters .search{grid-column:1/-1;grid-row:auto}.filters label:last-child{grid-column:auto}.section-heading h2{font-size:21px}.section-heading{gap:10px}.section-heading .button{font-size:10px;padding:8px 10px}.practice-layout{grid-template-columns:1fr}.exercise-list{display:grid;grid-template-columns:1fr 1fr;gap:5px}.exercise-item{padding:10px;font-size:11px}.exercise-detail{padding:20px}.notebook-controls{grid-template-columns:1fr 1fr}.notebook-controls label:first-child{grid-column:1/-1}.transcript-row{grid-template-columns:50px 1fr;gap:8px}.transcript-content{grid-column:1/-1}.transcript-row .speaker-select{width:130px;justify-self:end}.method{grid-template-columns:1fr;gap:24px;margin-top:40px}.method div:first-child p{margin-bottom:0}footer{padding:22px 20px;display:block}footer span{display:block;margin-top:12px}.video-card{min-height:215px}}
@media(prefers-reduced-motion:no-preference){.button,.exercise-item,.bookmark{transition:background .15s,color .15s}}

.exercise-list{max-height:650px;overflow:auto}.mobile-exercise{display:none}
@media(max-width:640px){.mobile-exercise{display:block;margin-top:12px}.exercise-list{display:none}}

.panel{scroll-margin-top:78px}
.timeline-filters{display:grid;grid-template-columns:1.4fr 1fr 1.4fr 1fr;gap:12px}.episode-block{margin:28px 0 46px}.episode-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:16px}.episode-heading h3{font-size:21px;margin:8px 0}.episode-heading p{margin:6px 0}.round-card{padding:22px;background:var(--card);border:1px solid var(--line);border-radius:10px;margin-bottom:14px;scroll-margin-top:85px}.round-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.round-card h4{font-size:18px;margin:14px 0}.round-source{font-size:11px;display:flex;gap:20px;margin:12px 0 18px;flex-wrap:wrap}.dialogue-turn{display:grid;grid-template-columns:68px 76px minmax(0,1fr);gap:12px;margin:10px 0;align-items:baseline}.dialogue-turn p{margin:0;font-size:14px;white-space:pre-wrap;overflow-wrap:anywhere}.turn-role{font-size:11px;color:var(--muted)}.dialogue-turn .time-link{padding:0}.round-commentary{margin-top:16px;background:var(--soft);padding:12px;border-radius:7px}.round-commentary .dialogue-turn{grid-template-columns:68px minmax(0,1fr)}.round-commentary .turn-role{display:none}.round-uncertainty{font-size:11px;color:var(--warm);margin:14px 0 0}
@media(max-width:900px){.timeline-filters{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.tabs{gap:14px}.tabs a{font-size:11px;gap:4px}.tabs span{padding:2px 4px}.timeline-filters{grid-template-columns:1fr 1fr}.timeline-filters label:first-child,.timeline-filters .search{grid-column:1/-1}.episode-heading{align-items:flex-start;gap:10px}.episode-heading h3{font-size:18px}.episode-heading .button{font-size:10px;padding:7px;white-space:nowrap}.round-card{padding:16px}.dialogue-turn{grid-template-columns:56px minmax(0,1fr);gap:6px}.dialogue-turn p{grid-column:1/-1;font-size:13px}.round-commentary .dialogue-turn{grid-template-columns:56px minmax(0,1fr)}.round-commentary .dialogue-turn p{grid-column:2}.round-card h4{font-size:16px}.round-heading .small{font-size:10px}}
.full-source{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:0 0 18px;font-size:11px}.full-source span{color:var(--muted)}#load-full-transcript{margin-left:8px}
@media(max-width:640px){#load-full-transcript{margin:10px 0 0}.full-source{gap:10px}}
.hero{max-width:900px;padding:28px 0 18px}.hero h1{font-size:36px;line-height:1.25;margin-bottom:14px}.hero h1 br{display:none}.hero .intro{max-width:780px;margin-bottom:16px;font-size:13px}.hero .stats{gap:32px}.hero .stat strong{font-size:24px}.hero .progress-note{margin-top:12px}.topbar{padding-top:20px;padding-bottom:20px}.tabs{margin-top:0;margin-bottom:26px}
@media(max-width:640px){.hero{padding-top:22px}.hero h1{font-size:28px}.hero .intro{font-size:12px}.hero .stats{gap:25px}}
.turn-role small{display:block;font-size:9px;color:var(--warm);margin-top:3px}
.alternate-sources{flex-basis:100%;margin:0;overflow-wrap:anywhere}.alternate-sources a{display:block;font-size:10px;margin-top:7px}