:root{--bg:#f6f7f9;--card:#fff;--ink:#1b2430;--mut:#6b7684;--line:#e3e6ea;--acc:#0f8a5f;--acc-bg:#e6f4ee;--org:#e8742b;--org-bg:#fff1e6;--err:#c43c3c;--head:#f1f3f5}
@media (prefers-color-scheme:dark){:root{--bg:#14171c;--card:#1d2228;--ink:#e7eaee;--mut:#9aa4b0;--line:#30363e;--acc:#3fc28d;--acc-bg:#16362a;--org:#f29a5c;--org-bg:#3a2717;--err:#ff7b7b;--head:#232930}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 -apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif}
a{color:var(--acc)}code{font-size:.92em}
.top{display:flex;align-items:center;gap:16px;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{font-weight:700;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px}
.mark{background:var(--acc);color:#fff;border-radius:6px;padding:2px 6px;font-size:12px}
.tabs{display:flex;gap:4px}.tabs a{padding:6px 12px;border-radius:8px;text-decoration:none;color:var(--mut)}.tabs a.on{background:var(--acc-bg);color:var(--acc);font-weight:700}
.out{margin-left:auto;display:flex;gap:8px;align-items:center}.who{color:var(--mut);font-size:13px}
button,.btn{font:inherit;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:8px;padding:7px 14px;cursor:pointer;text-decoration:none;display:inline-block;min-height:40px}
.primary{background:var(--acc);border-color:var(--acc);color:#fff}
.wrap{max-width:1180px;margin:0 auto;padding:16px}.narrow{max-width:520px;margin:0 auto;padding:16px}
h1{font-size:22px;margin:8px 0 14px}h1 small,.hello small{font-size:14px;color:var(--mut);font-weight:400;margin-left:6px}h2{font-size:16px;margin:22px 0 8px}
.card h2{margin-top:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;margin-bottom:12px}
.login{display:flex;flex-direction:column;gap:12px}.login label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--mut)}
input,select{font:inherit;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);min-height:42px}
.muted{color:var(--mut)}.small{font-size:12px}.err{color:var(--err);margin:0}.later{text-align:center;font-size:13px}
.band{display:block;background:var(--org-bg);color:var(--org);padding:10px 14px;border-radius:10px;text-decoration:none;font-weight:600;margin-bottom:12px}
.cnt{background:var(--acc-bg);color:var(--acc);border-radius:20px;padding:1px 8px;font-size:13px;margin-left:4px}
.cls-h{display:flex;justify-content:space-between;align-items:center;font-size:18px}.cls.ended{opacity:.6}
.kv{display:grid;grid-template-columns:max-content 1fr;gap:4px 14px;margin:10px 0}.kv dt{color:var(--mut);font-size:13px}.kv dd{margin:0}
.slots{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:4px}.slots li{background:var(--head);border-radius:8px;padding:6px 10px}.slots li.m{background:var(--org-bg)}
.pill{display:inline-block;font-size:11px;padding:1px 8px;border-radius:20px;background:var(--org-bg);color:var(--org);vertical-align:middle}.pill.green{background:var(--acc-bg);color:var(--acc)}.pill.gray{background:var(--head);color:var(--mut)}
.week{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.day{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:8px;font-size:12px;display:flex;flex-direction:column;gap:4px}
.day.today{border-color:var(--acc);box-shadow:0 0 0 1px var(--acc)}.day b{font-size:14px}.day em{display:block;font-style:normal;color:var(--mut)}.day .none{color:var(--mut)}
.foot{text-align:center;margin-top:24px;font-size:13px}
.filters{display:grid;grid-template-columns:2fr 1fr 1fr 1fr auto;gap:10px;align-items:end;background:var(--head);border:1px solid var(--line);border-radius:10px;padding:12px}
.filters label{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--mut)}
.total{margin:14px 0 6px;font-size:13px}
.grid{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);font-size:13px}
.grid th{background:var(--head);font-weight:600;padding:8px;border-bottom:1px solid var(--line);white-space:nowrap}
.grid td{padding:8px;border-bottom:1px solid var(--line);text-align:center;vertical-align:middle}.grid td.num{text-align:right}.grid td.left,.grid td.cl{text-align:left}
.chip{display:inline-block;background:var(--acc-bg);color:var(--acc);border-radius:6px;padding:2px 8px;margin:2px;text-decoration:none;white-space:nowrap}.chip.off{background:var(--head);color:var(--mut)}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--org);margin-left:6px;vertical-align:middle}
.warn{font-size:11px;color:var(--org)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mini{border-collapse:collapse;font-size:13px}.mini td,.mini th{padding:4px 12px 4px 0;text-align:left}
@media (max-width:760px){
 .week{grid-template-columns:repeat(3,1fr)}.two{grid-template-columns:1fr}.filters{grid-template-columns:1fr}
 .grid,.grid tbody,.grid tr,.grid td{display:block;width:100%}.grid thead{display:none}.grid{border:0;background:none}
 .grid tr{background:var(--card);border:1px solid var(--line);border-radius:10px;margin-bottom:8px;padding:6px 10px}
 .grid td{border:0;text-align:left;padding:3px 0;display:flex;gap:10px}.grid td.num{text-align:left}
 .grid td::before{content:attr(data-l);color:var(--mut);min-width:72px;font-size:12px;flex:none}
 .grid td.cl{flex-wrap:wrap}.tabs{order:3;width:100%}.out{margin-left:auto}
}
/* ── 풀이 사진·채점 (2026-11-15) ── */
.wide{width:100%;text-align:center}.big{min-height:52px;font-size:17px;font-weight:700}
.up-btn{margin:10px 0 4px}
.check{flex-direction:row!important;align-items:center;gap:8px!important;font-size:14px!important;color:var(--ink)!important}.check input{min-height:auto;width:20px;height:20px}
.field{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--mut);margin:8px 0}textarea{font:inherit;padding:9px 10px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink)}
.up{display:grid;grid-template-columns:2fr 1fr;gap:8px;margin:8px 0}.up .btn{display:flex;align-items:center;justify-content:center}
.prog{background:var(--acc-bg);color:var(--acc);border-radius:8px;padding:8px 12px;margin:8px 0;font-weight:600}
.phgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:8px}.phgrid.big{grid-template-columns:repeat(2,1fr)}
.phgrid figure{margin:0;position:relative;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--head)}
.phgrid img{display:block;width:100%;aspect-ratio:3/4;object-fit:cover}.phgrid.big img{aspect-ratio:auto;max-height:520px;object-fit:contain}
.phgrid figcaption{font-size:12px;padding:4px 8px;color:var(--mut)}.phgrid figure.gone{opacity:.45}
.phgrid .x{position:absolute;top:4px;right:4px;min-height:32px;padding:2px 10px;background:rgba(0,0,0,.6);color:#fff;border:0;border-radius:16px}.phgrid .x.sure{background:var(--err)}
.addrow{display:flex;gap:8px;margin:8px 0}.addrow input{flex:1}
.marks{list-style:none;margin:8px 0;padding:0;display:flex;flex-direction:column;gap:6px}
.marks li{display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:var(--head);border-radius:10px;padding:6px 8px}.marks li b{min-width:56px}
.seg{display:flex;gap:4px}.seg button{min-height:40px;padding:4px 12px;font-size:14px}
.seg .r-ok.on{background:var(--acc);border-color:var(--acc);color:#fff}.seg .r-wrong.on{background:var(--err);border-color:var(--err);color:#fff}.seg .r-unknown.on{background:var(--org);border-color:var(--org);color:#fff}
.marks .del{margin-left:auto;min-height:36px;padding:2px 10px}
.r{display:inline-block;font-size:12px;padding:1px 8px;border-radius:20px;font-weight:600}.r.ok{background:var(--acc-bg);color:var(--acc)}.r.wrong{background:#fde8e8;color:var(--err)}.r.unknown,.r.partial{background:var(--org-bg);color:var(--org)}
@media (prefers-color-scheme:dark){.r.wrong{background:#3d1f1f}}
.tmark{margin-left:4px}
.sum{font-size:14px;font-weight:600;margin:6px 0}
.donebox{text-align:center;margin:16px 0}
.tcheck{border-color:var(--acc);background:var(--acc-bg)}.tcheck p{margin:6px 0 0}
.pastlist{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:6px}.pastlist a{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 12px;text-decoration:none;color:var(--ink)}
.padbar{background:var(--org-bg);color:var(--org);text-align:center;font-size:13px;padding:6px 12px;font-weight:600}
.switch{background:var(--org);border-color:var(--org);color:#fff;font-weight:700}
.thumbs{display:flex;gap:4px;align-items:center}.thumbs img{width:44px;height:58px;object-fit:cover;border-radius:6px;border:1px solid var(--line)}
.grid tr.todo td:first-child{box-shadow:inset 3px 0 0 var(--org)}
.solgrid{display:grid;grid-template-columns:3fr 2fr;gap:12px;align-items:start}
.mtab{width:100%;border-collapse:collapse;font-size:14px}.mtab th{text-align:left;color:var(--mut);font-weight:600;font-size:12px;padding:4px}.mtab td{padding:5px 4px;border-top:1px solid var(--line)}
.checkrow{margin-top:12px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
#toasts{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);display:flex;flex-direction:column;gap:6px;z-index:9}
.toast{background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:10px;font-size:14px}.toast.err{background:var(--err);color:#fff}
@media (max-width:760px){.solgrid{grid-template-columns:1fr}.phgrid.big{grid-template-columns:1fr}.filters .check{padding-top:4px}}
.dl-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.dl-top h2{margin:0}.qr svg{width:120px;height:120px;background:#fff;border-radius:8px}
.sha{word-break:break-all;margin-top:8px}
.h1row{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}