:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--surface-muted);font-size:16px;line-height:1.55}*{box-sizing:border-box}body{margin:0}header{height:82px;background:var(--surface);border-bottom:1px solid var(--line);padding:0 5%;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{color:var(--info-ink);text-decoration:none;font-weight:800;font-size:26px;display:flex;align-items:center;gap:18px}.brand span{font-size:15px;color:var(--muted);font-weight:500}#account{display:flex;align-items:center;gap:12px;font-size:14px}main{max-width:1180px;margin:36px auto;padding:0 24px;min-height:70vh}h1{font-size:32px;letter-spacing:-1px;line-height:1.2;margin:8px 0 16px}h2{font-size:21px;margin:0 0 18px}h3{font-size:17px;margin:0 0 10px}p{white-space:pre-wrap;overflow-wrap:anywhere}.muted,small{color:var(--muted)}.intro{margin-bottom:28px}.layout{display:grid;grid-template-columns:260px 1fr;gap:24px}.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px;margin-bottom:18px}.login{max-width:470px;margin:70px auto}.stack{display:grid;gap:12px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}button,.button{font:inherit;cursor:pointer;border:1px solid var(--line);background:var(--surface);color:var(--info-ink);padding:9px 15px;border-radius:9px;text-decoration:none;display:inline-block}button:hover{background:var(--info-soft);border-color:var(--info-line)}button.primary{background:#2465cd;color:white;border-color:var(--info-line)}button.danger{color:var(--danger-ink)}button:disabled{opacity:.55;cursor:wait}button.selected{background:var(--info-soft);color:var(--info-ink);border-color:var(--info-line)}input,textarea,select{width:100%;font:inherit;border:1px solid var(--line-strong);border-radius:8px;padding:10px;background:var(--surface);color:inherit}textarea{min-height:100px;resize:vertical}label{display:grid;gap:5px;font-size:14px;font-weight:600}form{display:grid;gap:15px}form .row label{flex:1;min-width:160px}a{color:var(--info-ink)}nav{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap}.badge{border-radius:30px;padding:4px 11px;background:var(--info-soft);font-size:12px;font-weight:600;display:inline-block}.warning{background:var(--warning-soft);color:var(--warning-ink)}.good{background:var(--success-soft);color:var(--success-ink)}.file{padding:10px 0;border-bottom:1px solid var(--info-line)}.empty{text-align:center;padding:36px;color:var(--muted)}#notice:not(:empty){position:sticky;top:0;z-index:5;padding:12px 5%;background:var(--warning-soft);border-bottom:1px solid var(--warning-line);color:var(--warning-ink)}footer{padding:28px;text-align:center;color:var(--muted);font-size:12px}details summary{cursor:pointer;font-weight:600;margin-bottom:12px}.divider{border-top:1px solid var(--info-line);margin:20px 0}.score{font-size:24px;font-weight:750;color:var(--info-ink)}:focus-visible{outline:3px solid var(--info-line);outline-offset:3px}@media(max-width:760px){.layout{grid-template-columns:1fr}.brand>span:not(.brand-composition){display:none}header{padding:0 20px}main{padding:0 16px;margin-top:24px}h1{font-size:27px}.card{padding:18px}#account{max-width:75%;overflow-wrap:anywhere}.login{margin:24px auto}}
/* A lesson-linked deadline stays compact inside the existing homework editor. */
.schedule-homework-deadline{display:grid;gap:10px;padding:12px;border:1px solid var(--line);border-radius:10px;background:var(--surface-muted)}.row>.schedule-homework-deadline{flex:2;min-width:280px}.schedule-homework-anchor{display:flex;justify-content:space-between;gap:12px;align-items:baseline}.schedule-homework-anchor small{font-weight:500;white-space:nowrap}.schedule-homework-deadline[hidden],.schedule-homework-deadline label[hidden]{display:none}@media(max-width:600px){.schedule-homework-anchor{align-items:flex-start;flex-direction:column;gap:2px}.schedule-homework-anchor small{white-space:normal}.row>.schedule-homework-deadline{min-width:100%}}