:root{--bg:#f6f7f9;--card:#fff;--ink:#1c2430;--mute:#667085;--line:#d9dee5;--accent:#1f6feb;--bad:#d92d20;--badbg:#fee4e2;--warnbg:#fff4d6;--ok:#1a7f37;--okbg:#dafbe1}
@media (prefers-color-scheme:dark){:root{--bg:#12161c;--card:#1a2029;--ink:#e6e9ee;--mute:#98a2b3;--line:#2c3440;--accent:#5b9bff;--bad:#ff7066;--badbg:#4a1d1a;--warnbg:#3d3213;--ok:#56d364;--okbg:#12361e}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.4 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:1100px;margin:0 auto;padding:16px}
h1{font-size:22px;margin:0 0 12px}
.brand{display:flex;align-items:center;gap:14px;min-width:0}
.brand h1{margin:0}
img.logo{height:52px;width:auto;flex:none}
.gate img.logo{height:60px;align-self:flex-start}
@media (max-width:600px){img.logo{height:36px}.brand{gap:10px}.brand h1{font-size:17px}}
@media (prefers-color-scheme:dark){img.logo{filter:invert(1)}}
.printhead{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.printhead img{height:40px;width:auto}
@media print{img.logo{filter:none}}
.top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:0}
.top h1{margin:0 0 12px}
button.logout{background:var(--bad);border-color:var(--bad);color:#fff;font-weight:600;padding:8px 16px;white-space:nowrap}
h2{font-size:16px;margin:0 0 10px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px;margin-bottom:14px}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:14px}
label{color:var(--mute);font-size:13px}
input,select,button{font:inherit;color:var(--ink);background:var(--card);border:1px solid var(--line);border-radius:6px;padding:5px 8px}
button{cursor:pointer}
button.primary{background:var(--accent);border-color:var(--accent);color:#fff}
button.danger{color:var(--bad)}
button:hover:not(:disabled){filter:brightness(.96)}
:disabled{opacity:.5;cursor:not-allowed}
.tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.tabs button{padding:4px 10px;text-align:center;line-height:1.2}
.tabs button small{display:block;color:var(--mute);font-size:11px}
.tabs button.on{background:var(--accent);border-color:var(--accent);color:#fff}
.tabs button.on small{color:#e8f0ff}
.scroll{overflow-x:auto}
table{border-collapse:collapse;width:100%}
th,td{border:1px solid var(--line);padding:6px;text-align:left;vertical-align:middle}
th{font-weight:600;background:var(--bg)}
.grid td.time{white-space:nowrap;color:var(--mute);width:90px}
.cell{display:flex;gap:4px;align-items:center;min-width:170px}
.cell .stu{flex:1;display:flex;flex-direction:column;gap:4px;min-width:0}
.cell select{width:100%;min-width:0;padding:4px}
.cell select.ins{flex:1}
table.att{width:auto;min-width:100%}
table.att th,table.att td{text-align:center;padding:4px 6px;white-space:nowrap}
table.att th small{display:block;color:var(--mute);font-weight:400;font-size:11px}
table.att th:first-child,table.att td:first-child{text-align:left;position:sticky;left:0;background:var(--card);z-index:1}
table.att th:first-child{background:var(--bg)}
table.att td.name{min-width:130px}
table.att tfoot td{background:var(--bg);font-weight:600}
table.att input[type=checkbox]{width:18px;height:18px}
.mrow td{background:var(--bg)}
.mrow .mute{margin-top:2px}
input.mval{width:100%;min-width:90px;text-align:right}
input.mval.red{color:var(--bad);background:var(--badbg);border-color:var(--bad);font-weight:600}
input.mval.green{color:var(--ok);background:var(--okbg);border-color:var(--ok);font-weight:600}
td.bad{background:var(--badbg)}
td.warn{background:var(--warnbg)}
.list input.name{width:100%}
.list input.code{width:64px;text-transform:uppercase;text-align:center;font-weight:600}
.mute{color:var(--mute);font-size:13px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chips label{display:flex;gap:6px;align-items:center;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:4px 8px}
.chips label.on{border-color:var(--accent)}
.role{font-weight:600}
dialog{border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink);padding:18px;min-width:280px}
dialog::backdrop{background:rgba(0,0,0,.45)}
dialog form{display:flex;flex-direction:column;gap:10px}
.gate{max-width:380px;margin:12vh auto 0;padding:0 16px}
.gate form{display:flex;flex-direction:column;gap:10px}
.gate form + form{margin-top:14px}
.gate input[type=password]{width:100%}
#gateCode{font-size:26px;letter-spacing:.4em;text-align:center;width:100%}
.gatemsg{color:var(--bad);min-height:1.2em;margin:0;font-size:13px}
#printArea{display:none}
@media print{
  main,dialog{display:none}
  #printArea{display:block}
  #printArea h2{margin:14px 0 6px;page-break-after:avoid}
  #printArea table{margin-bottom:8px;font-size:12px}
  #printArea .pb{page-break-before:always}
  body{background:#fff;color:#000}
}