:root{--ink:#1c3027;--muted:#59655e;--paper:#f7f8f3;--line:#d9dfd6;--green:#245c43;--mint:#e5f2df;--error:#a52e28}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 -apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif}header{height:76px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:24px;padding:0 32px}header>a:last-child{margin-left:auto;font-size:13px}a{color:var(--green);text-underline-offset:4px}h1,h2,h3,p{margin:0 0 16px}h1{font-size:30px;letter-spacing:-.5px;line-height:1.35}h2{font-size:20px}h3{font-size:17px}.brand{display:flex;align-items:center;gap:10px}.brand img{width:40px;height:40px;object-fit:contain}.brand .wordmark{width:92px;height:auto}button,.button{font:inherit;border:1px solid var(--green);background:var(--green);color:white;min-height:44px;padding:9px 17px;border-radius:6px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px}button:hover{filter:brightness(.95)}button:disabled{opacity:.55;cursor:wait}.secondary{color:var(--ink);background:#fff;border-color:#aebbb0}.quiet{color:var(--green);background:transparent;border-color:transparent}.danger{color:var(--error);background:white;border-color:#d7b4af}:focus-visible{outline:3px solid #966c00;outline-offset:3px}input,select,textarea{font:inherit;color:var(--ink);width:100%;background:#fff;border:1px solid #9eaca1;border-radius:5px;padding:10px;min-height:44px}textarea{resize:vertical;min-height:110px}input[type=checkbox],input[type=radio]{width:20px;min-height:20px;accent-color:var(--green);flex-shrink:0}label{display:block;font-size:13px;font-weight:600;margin-bottom:14px}label>input,label>textarea,label>select{margin-top:6px}small,.muted{color:var(--muted)}small{font-size:12px}.eyebrow{color:var(--muted);font-size:12px;letter-spacing:1px;margin-bottom:8px}.workspace{display:grid;grid-template-columns:240px minmax(0,1fr);min-height:calc(100vh - 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24px));max-height:90vh;padding:28px;box-shadow:0 15px 70px #132b2426}dialog::backdrop{background:#15231ccc}dialog>form{margin-top:16px}.check{display:flex;align-items:center;gap:10px;font-weight:400}.checks{display:flex;gap:14px;flex-wrap:wrap}.paper-item{display:grid;grid-template-columns:35px minmax(0,1fr) 100px auto;align-items:center;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}.paper-item p{margin:0}.paper-item .actions{gap:4px}.paper-item button{padding:5px 9px}.paper-item label{margin:0}.student{max-width:480px;margin:30px auto;padding:0;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;min-height:740px}.student-content{padding:26px}.hero{padding:30px 26px;background:radial-gradient(ellipse at 90% 0,#f1ffcc,transparent 60%),linear-gradient(145deg,#b9f5df,#e6f8e2)}.hero h1{font-size:62px;letter-spacing:-3px;margin:20px 0}.hero h1 span{display:block;color:#fff;text-shadow:2px 3px #193e2f;-webkit-text-stroke:1px #193e2f}.hero .exam{font-size:21px;font-weight:700}.hero .exam strong{display:block;font-size:27px}.hero p{font-size:13px}.series{border:1px solid var(--line);padding:22px;margin:20px 0}.series.black{background:#1e2d25;color:white}.series h2{font-size:30px}.series.black p{color:#d8e4d7}.series .actions button{flex:1}.bottom{position:sticky;bottom:0;padding:16px 24px;background:#fff;border-top:1px solid var(--line)}.wide{width:100%}.student-top{padding:16px 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px}.student-top button{padding:6px 12px}.question{white-space:pre-wrap;font-size:17px;line-height:1.9;margin:24px 0}.option{display:flex;justify-content:flex-start;text-align:left;width:100%;margin-bottom:12px;padding:14px;background:#fff;border-color:#bcc9bc;color:var(--ink)}.option[aria-pressed=true],.sheet-options button[aria-pressed=true]{background:var(--mint);border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green)}.sheet-options{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.sheet-options button{background:#fff;color:var(--ink);border-color:#afbdad}.sheet-row{padding:20px 0;border-bottom:1px solid var(--line)}.sheet-row .meta{margin-bottom:10px;font-size:13px}.score{font-size:64px;line-height:1.2;padding:15px 0}.score small{font-size:22px}.result-q{border-top:1px solid var(--line);padding:22px 0}.result-q p{white-space:pre-wrap}.answer{padding:12px;background:#edf3e8}.grid-card{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.grid-card button{background:white;color:var(--green);border-color:var(--line)}.grid-card .answered{background:var(--mint)}.teachers{display:grid;grid-template-columns:1fr 1fr;gap:16px}.teachers img{width:100%;height:160px;object-fit:cover;object-position:center top}.teachers h3{margin:8px 0 0}.teachers p{font-size:12px}details{padding:14px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:600}details p{margin:12px 0 0;font-size:13px}.skip{position:absolute;left:10px;top:-100px;padding:12px;background:white;z-index:10}.skip:focus{top:10px}#notice{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#1c3027;color:#fff;border-radius:8px;padding:12px 20px;max-width:90vw;z-index:50;display:none}#notice.visible{display:block}#environment{font-size:12px;color:var(--muted)}.login{max-width:450px;margin:50px auto}.preview-question{padding:20px 0;border-top:1px solid var(--line);white-space:pre-wrap}
@media(max-width:1000px){.workspace{grid-template-columns:195px minmax(0,1fr)}main{padding:28px 24px}.toolbar{grid-template-columns:repeat(2,minmax(0,1fr))}.paper-item{grid-template-columns:25px minmax(0,1fr) 80px}.paper-item>.actions{grid-column:2/-1}}
@media(max-width:650px){header{height:auto;min-height:65px;padding:12px 16px;gap:12px;flex-wrap:wrap}header>a:last-child{font-size:12px}#environment{order:3;width:100%}.workspace{display:block}aside{padding:16px;border:0}aside h2,aside .eyebrow,.aside-foot{display:none}nav{display:flex;overflow:auto}nav button{white-space:nowrap;flex-shrink:0}main{padding:24px 16px}.page-head{display:block}.page-head>.actions{margin-top:16px}.panel{padding:16px}h1{font-size:26px}.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.student{margin:0 auto;border:0;border-radius:0;min-height:calc(100vh - 65px)}.list-row{align-items:flex-start;flex-wrap:wrap}.list-row>.actions{width:100%}.pager{gap:6px;font-size:12px}.pager button{padding:8px}.select-bar select{width:100%;max-width:none}.paper-item{gap:8px}dialog{padding:18px}.toolbar{gap:10px}.student-content{padding:22px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}