:root{--bg:#f2f5f9;--surface:#fff;--ink:#12233d;--muted:#5d6b80;--line:#dde3ec;--brand:#0f2a4a;--accent:#0a9d86;--accent-ink:#fff;--danger:#b3261e;--shadow:0 1px 2px rgba(15,42,74,.06),0 8px 24px rgba(15,42,74,.06)}
@media(prefers-color-scheme:dark){:root{--bg:#0c1522;--surface:#142235;--ink:#e8eef7;--muted:#9aa9bf;--line:#243652;--brand:#07101c;--accent:#2ec4a9;--accent-ink:#06241f;--danger:#ff8a80;--shadow:none}}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%}
body{font-family:"Segoe UI",system-ui,-apple-system,Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;font-weight:700;letter-spacing:-.01em;margin:0}
button,input{font:inherit}button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
.login{display:grid;grid-template-columns:1.1fr 1fr;min-height:100vh}
.hero{background:var(--brand);color:#fff;padding:clamp(28px,5vw,64px);display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}
.hero svg.art{position:absolute;right:-60px;bottom:-40px;width:420px;opacity:.9}
.brand{display:flex;align-items:center;gap:12px;font-weight:600}
.logo{width:40px;height:40px;border-radius:10px;background:var(--accent);display:grid;place-items:center;color:var(--accent-ink);flex:none}
.hero h1{font-size:clamp(32px,4.4vw,54px);line-height:1.1;max-width:13ch;position:relative}
.hero p{max-width:38ch;color:#b8c7dd;position:relative;margin:16px 0 0}
.panel{display:grid;place-items:center;padding:24px}
.panel.solo{min-height:100vh}
.card{width:100%;max-width:400px}
.card h2{font-size:28px}
.card .sub{color:var(--muted);margin:6px 0 28px}
label{display:block;font-weight:600;font-size:14px;margin:0 0 6px}
.field{margin-bottom:18px}
input{width:100%;padding:13px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink)}
input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent)}
.pw{position:relative}.pw button{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:none;border:0;color:var(--muted);padding:8px;font-size:13px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:10px;background:var(--accent);color:var(--accent-ink);font-weight:700;padding:13px 18px;text-decoration:none;transition:filter .15s}
.btn:hover{filter:brightness(1.08)}
.btn.block{width:100%}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn.sm{padding:8px 12px;font-size:14px}
.btn.danger{color:var(--danger)}
.err{color:var(--danger);font-size:14px;min-height:22px;margin:0 0 10px}
.hint,.muted{font-size:13px;color:var(--muted)}
.hint{margin-top:14px}
.top{background:var(--brand);color:#fff}
.top .in{max-width:880px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.top .btn.ghost{color:#fff;border-color:rgba(255,255,255,.3);padding:9px 14px}
.wrap{max-width:880px;margin:0 auto;padding:36px 20px 64px}
.profile{display:flex;gap:18px;align-items:center;margin-bottom:32px}
.avatar{width:64px;height:64px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font:700 24px Georgia,serif;flex:none}
.profile h2{font-size:clamp(24px,4vw,34px);line-height:1.15}
.profile p{margin:2px 0 0;color:var(--muted)}
.list{display:grid;gap:12px;padding:0;margin:16px 0 0;list-style:none}
.doc{display:flex;align-items:center;gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px;box-shadow:var(--shadow)}
.pdf{width:44px;height:52px;border-radius:6px;background:#e5484d;color:#fff;font:700 12px "Segoe UI",sans-serif;display:grid;place-items:end center;padding-bottom:7px;flex:none}
.pdf.mini{width:30px;height:36px;font-size:10px;padding-bottom:4px}
.doc .t{flex:1;min-width:0}.doc .t strong{display:block;overflow-wrap:anywhere}
.doc .t span{font-size:13px;color:var(--muted)}
.empty{border:1.5px dashed var(--line);border-radius:14px;padding:36px 20px;text-align:center;color:var(--muted)}
/* admin */
.wrap h2{font-size:24px;margin-bottom:14px}.wrap h2.sp{margin-top:36px}
.panelbox{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:0 16px;align-items:end}
.grid .btn{grid-column:1/-1;justify-self:start}
.notice{padding:12px 16px;border-radius:10px;margin:0 0 20px;background:color-mix(in srgb,var(--accent) 18%,var(--surface));border:1px solid var(--accent)}
.notice.err{background:color-mix(in srgb,var(--danger) 14%,var(--surface));border-color:var(--danger);color:var(--ink);min-height:0}
#q{margin-bottom:14px}
.student{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin-bottom:12px}
.student:target{border-color:var(--accent)}
.shead{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:center}
.shead strong{display:block}.acts{display:flex;gap:8px}
.flist{list-style:none;margin:12px 0;padding:0;display:grid;gap:8px}
.flist li{display:flex;align-items:center;gap:12px}
.flist .ft{flex:1;min-width:0;overflow-wrap:anywhere}
.upl{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.upl input{width:auto;flex:1 1 180px;padding:9px 12px}
@media(max-width:820px){.login{grid-template-columns:1fr}.hero{min-height:230px}.hero svg.art{width:260px}.hero p{display:none}}
@media(max-width:560px){.doc{flex-wrap:wrap}.doc .btn{width:100%}.grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.report p{margin:6px 0}.errlist{margin:6px 0 0;padding-left:20px;font-size:14px;max-height:220px;overflow:auto}
.wrap a{color:var(--accent)}code{background:var(--bg);padding:1px 6px;border-radius:5px}
.muted a{font-weight:600}