*{box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"Microsoft YaHei",sans-serif;margin:0;background:#f6f7f9;color:#18212f;font-size:17px;line-height:1.5}
.wrap{max-width:900px;margin:0 auto;padding:16px}
.card{background:#fff;border:1px solid #dfe3ea;border-radius:8px;padding:14px;margin:10px 0}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
input,select,button{font-size:17px;min-height:46px;padding:10px 12px;border:1px solid #c9d1dc;border-radius:6px}
button{background:#1f6feb;color:#fff;border-color:#1f6feb;cursor:pointer;font-weight:700}
button.secondary{background:#fff;color:#1f6feb}
button.submit-button{background:#cf222e;border-color:#cf222e;color:#fff;font-size:18px;min-height:54px;padding:12px 16px;font-weight:800}
.q{background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:14px;margin:10px 0}
.stem{font-weight:700;margin-bottom:8px}
.option{display:flex;gap:10px;align-items:flex-start;margin:10px 0;padding:12px;border:1px solid #e5e7eb;border-radius:8px}
.option input{width:22px;height:22px;min-height:22px;margin-top:2px;flex:0 0 auto}
.bottom-actions{justify-content:flex-end}
.muted{color:#637083}.danger{color:#b42318}.ok{color:#067647}.hidden{display:none}
.bar{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.user-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:8px;margin-top:8px}
.user-name{background:#fff;color:#18212f;border:1px solid #c9d1dc;font-weight:600}
.user-name.active{background:#1f6feb;color:#fff;border-color:#1f6feb}
table{width:100%;border-collapse:collapse;background:#fff;margin-top:12px}
td,th{padding:12px 10px;border-bottom:1px solid #e5e7eb;text-align:left}
a{color:#1f6feb;text-decoration:none;font-weight:600}
@media(max-width:640px){
  body{font-size:18px;background:#fff}.wrap{padding:10px}h2{font-size:22px}
  .card{border-left:0;border-right:0;border-radius:0;margin:8px -10px;padding:12px 10px}
  .row{display:grid;grid-template-columns:1fr;align-items:stretch}
  input,select,button{width:100%;font-size:18px;min-height:50px}
  .q{border-left:0;border-right:0;border-radius:0;margin:8px -10px;padding:14px 10px}
  button.submit-button{font-size:20px;min-height:62px;padding:15px 18px}
  .user-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .user-name{font-size:18px}
  label.option{font-size:18px;padding:14px 12px}
  .exam-actions{position:sticky;top:0;z-index:10;background:#fff}
  .table-wrap{overflow-x:auto;margin:0 -10px}
  td,th{white-space:nowrap;font-size:16px}
}

.notice{background:#fff8e6;border:1px solid #f0d48a;color:#7a5b00;border-radius:8px;padding:10px 12px;margin:10px 0}
.field{display:flex;flex-direction:column;gap:6px;min-width:140px;flex:1}
.field label{font-size:14px;color:#637083;font-weight:600}
.field input,.field select{width:100%}
.grid-form{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:10px;align-items:end}
.batch{width:100%;min-height:140px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px}
.log{white-space:pre-wrap;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;background:#0f172a0d;border-radius:8px;padding:10px}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#e8f1ff;color:#1f6feb;font-size:13px;font-weight:700}
@media(max-width:640px){
  .grid-form{grid-template-columns:1fr}
}