:root{color-scheme:light;--paper:#faf9f5;--ink:#202d29;--muted:#66746d;--line:#dce1d9;--accent:#285d48;--tint:#edf2ec;--error:#a03c31;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer;border:1px solid var(--accent);border-radius:6px;padding:10px 18px;background:var(--accent);color:#fff;font-weight:500;line-height:1.4}button:hover:not(:disabled){filter:brightness(.94)}button:disabled{cursor:not-allowed;opacity:.48}button.secondary{background:transparent;color:var(--ink);border-color:#bac6bb}button.text{border:none;background:transparent;color:var(--accent);padding:7px 3px}button.small{padding:6px 10px;font-size:14px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #a4c9ac;outline-offset:3px}.site-header{max-width:1120px;margin:auto;padding:24px 32px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px}.brand{font-weight:650;color:var(--ink);white-space:nowrap}.brand span{font-size:14px;font-weight:400;color:var(--muted);border-left:1px solid var(--line);padding-left:15px;margin-left:15px}#account{font-size:14px;display:flex;align-items:center;gap:15px}main{max-width:1040px;padding:40px 32px 100px;margin:auto}h1{font-size:30px;line-height:1.3;font-weight:600;letter-spacing:-.5px;margin:8px 0 15px}h2{font-size:21px;margin:28px 0 15px;font-weight:600}h3{font-size:17px;margin:0 0 10px}p{margin:8px 0 14px}.muted,.caption{color:var(--muted);font-size:14px}.eyebrow{font-size:13px;letter-spacing:1.2px;color:var(--accent);font-weight:600}.intro{max-width:700px;color:var(--muted);font-size:15px}.login{max-width:420px;margin:5vh auto;background:#fff;padding:32px;border:1px solid var(--line);border-radius:10px}.login h1{font-size:27px}.login label{display:block;margin:20px 0 6px}input,textarea,select{background:#fff;color:var(--ink);border:1px solid #bdc9bd;border-radius:5px;padding:10px 12px;max-width:100%}.login input{width:100%}.login button[type=submit]{width:100%;margin-top:25px}.error{color:var(--error);font-size:14px;white-space:pre-wrap}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:28px 0 15px}.toolbar input{flex:1;min-width:160px}.toolbar button[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent)}.materials{border-top:1px solid var(--line)}.material{display:flex;align-items:center;gap:20px;padding:18px 0;border-bottom:1px solid var(--line)}.material .title{flex:1;font-family:Georgia,"Times New Roman",serif;font-size:20px}.part{font-size:12px;letter-spacing:1px;color:var(--muted);min-width:42px}.duration{font-size:13px;color:var(--muted);text-align:right;min-width:110px}.history{margin-top:35px}.history-row{display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding:10px 0}.history-row span{flex:1}.back{margin-bottom:20px}.steps{display:flex;list-style:none;padding:0;margin:25px 0;gap:22px;border-bottom:1px solid var(--line);font-size:14px}.steps li{padding-bottom:12px;color:var(--muted)}.steps li.active{color:var(--accent);font-weight:600;border-bottom:2px solid var(--accent)}.player{position:sticky;top:0;z-index:5;background:#f1f4ed;border:1px solid #d4dfd1;border-radius:8px;padding:15px 20px;margin:22px 0}.player-top{display:flex;align-items:center;justify-content:space-between;gap:16px}.play-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.time{font-variant-numeric:tabular-nums;font-size:14px;color:var(--muted)}progress{width:100%;height:5px;display:block;margin:14px 0 3px;accent-color:var(--accent)}.player .caption{margin:10px 0 0;font-size:12px}.writing{width:100%;min-height:330px;resize:vertical;line-height:1.9;padding:20px;font-family:Georgia,"Times New Roman","PingFang SC",serif;font-size:18px}.section-label{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}.actions{display:flex;align-items:center;gap:15px;flex-wrap:wrap;margin:22px 0}.boundary{border-left:3px solid #b7c4b5;padding:6px 14px;color:var(--muted);font-size:14px;background:#f0f2eb;margin:22px 0}.summary{display:flex;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0;margin:24px 0;flex-wrap:wrap}.stat strong{font-family:Georgia,"Times New Roman",serif;font-size:28px;font-weight:500;display:block;line-height:1.1}.stat span{font-size:13px;color:var(--muted)}details{border:1px solid var(--line);border-radius:6px;padding:14px 18px;background:#fff;margin:15px 0}summary{cursor:pointer;font-weight:500}.transcript{font-family:Georgia,"Times New Roman",serif;font-size:18px;line-height:1.9;overflow-wrap:anywhere}.transcript p{margin:12px 0}.missing{background:#f6e6be;border-radius:2px}.unit-number{font:11px -apple-system,sans-serif;color:#8b958d;vertical-align:super;margin-right:7px}.gap-unit{font-family:Georgia,"Times New Roman",serif;font-size:18px;line-height:2.7;padding:10px 0;border-bottom:1px solid var(--line)}.blank{display:inline-flex;align-items:center;gap:4px;vertical-align:middle;max-width:100%;margin:3px 5px}.blank span{font:11px -apple-system,sans-serif;color:var(--muted)}.blank input{font-family:Georgia,"Times New Roman",serif;font-size:17px;padding:5px 8px;width:230px;max-width:80vw;line-height:1.4;border:none;border-bottom:1px solid var(--accent);border-radius:0;background:#f0f4ee}.blank input.long{width:380px}.gap-card{border-top:1px solid var(--line);padding:20px 0;scroll-margin-top:100px}.gap-head{display:flex;gap:10px;align-items:baseline;justify-content:space-between}.gap-quote{font:19px/1.6 Georgia,"Times New Roman",serif;overflow-wrap:anywhere}.tag{font-size:12px;color:var(--accent);border:1px solid #c3d4c5;border-radius:4px;padding:1px 7px;white-space:nowrap}.tag.warn{color:#8d602d;border-color:#d6c4a6}.given{font-size:14px;color:var(--muted);overflow-wrap:anywhere;margin:6px 0}.context{font:15px/1.7 Georgia,"Times New Roman",serif;color:var(--muted)}.meaning{font-size:15px;max-width:760px;margin:10px 0}.lexicon{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.word{border:1px solid var(--line);background:#fff;padding:5px 10px;border-radius:5px;font-size:13px}.word button{padding:0 4px;font-family:Georgia,"Times New Roman",serif}.round-notes{white-space:pre-wrap;font-size:16px;line-height:1.8;overflow-wrap:anywhere}.feedback-tools{display:flex;gap:15px;align-items:center;flex-wrap:wrap;margin:18px 0}.empty{padding:25px 0;color:var(--muted)}#notice{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);max-width:calc(100vw - 30px);background:#223d30;color:#fff;padding:12px 20px;border-radius:6px;font-size:14px;z-index:30;display:none}.footer-note{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:16px;margin-top:35px}.pagination{display:flex;align-items:center;gap:15px;margin:20px 0}.note-good{color:var(--accent)}.vocab-note{font-size:13px;color:var(--muted)}
@media(max-width:640px){.site-header{padding:16px 18px;align-items:flex-start}.brand span{display:block;border:none;padding:0;margin:0;font-size:12px}#account{gap:8px;font-size:12px;flex-wrap:wrap;justify-content:flex-end;max-width:160px}main{padding:25px 18px 80px}h1{font-size:25px}.login{margin:20px auto;padding:24px}.material{flex-wrap:wrap;gap:8px 12px;padding:15px 0}.material .title{font-size:18px;min-width:65%}.material .duration{margin-left:54px;text-align:left;flex:1}.material button{padding:8px 14px}.steps{gap:0;justify-content:space-between;font-size:12px}.steps li{padding:10px 4px}.player{padding:12px;top:0}.player-top{gap:8px;flex-wrap:wrap}.play-controls{gap:8px}.play-controls button{padding:9px 13px}.writing{min-height:310px;font-size:17px;padding:14px}.summary{gap:25px}.stat strong{font-size:25px}.gap-head{flex-wrap:wrap}.gap-quote{font-size:18px}.blank input{width:180px}.blank input.long{width:260px}.history-row{font-size:14px}.history-row .caption{display:none}.actions button{flex:1;min-height:44px}.boundary{font-size:13px}.toolbar{gap:8px}.toolbar button{padding:9px 12px}.toolbar input{width:100%;flex-basis:100%}}@media print{.site-header,#account,.back,.player,button,.feedback-tools,#notice,.steps{display:none!important}main{max-width:none;padding:0}body{background:#fff}.gap-card,details{break-inside:avoid}.missing{background:transparent;text-decoration:underline}.summary{margin:15px 0}.footer-note{display:block}}
.blank input{min-width:0}.review-audio{display:block;width:100%;margin-top:12px}@media(max-width:640px){button{min-height:44px}}
.blank.long-blank{display:flex;width:100%;margin:8px 0;align-items:flex-start}.long-blank>span{padding-top:8px;min-width:68px;max-width:78px;line-height:1.5}.long-blank textarea{width:100%;min-width:0;min-height:64px;resize:vertical;font:17px/1.65 Georgia,"Times New Roman",serif;padding:8px 10px;background:#f0f4ee}.precise{font-size:14px;color:#76582b;margin:10px 0}.extra{background:#f5d9d2}.review-nav{display:flex;align-items:center;gap:16px;justify-content:space-between;margin:18px 0;flex-wrap:wrap}.review-nav a{font-size:14px}.submit-confirmation{border:1px solid #cbb88e;padding:16px;border-radius:6px;background:#fbf7e9;margin:20px 0}.submit-confirmation .actions{margin:12px 0 0}html{scroll-padding-top:var(--player-offset,180px)}#cloze,.gap-unit,[data-gap]{scroll-margin-top:var(--player-offset,180px)}@media(max-width:640px){body.is-typing .player{padding:8px 10px}body.is-typing .player .caption,body.is-typing .player-top>div:first-child{display:none}body.is-typing .player progress{margin-top:8px}body.is-typing .play-controls{gap:7px}.long-blank>span{min-width:55px;max-width:65px;font-size:10px}.review-nav button{width:100%}.submit-confirmation .actions button{flex-basis:100%}}
@media(max-width:640px){.blank.long-blank{display:block}.long-blank>span{display:block;max-width:none;padding:0 0 5px;font-size:11px;line-height:1.4}.long-blank textarea{display:block;width:100%}}
@media(max-width:640px){body.is-typing .writing{min-height:160px;height:clamp(160px,calc(var(--visible-height,100dvh) - 150px),330px)}}