:root{--ink:#15243d;--muted:#63718a;--blue:#2457d6;--line:#e2e8f0;--background:#f3f6fb;--white:#fff;--red:#b42318;--radius:14px;--shadow:0 5px 22px rgba(23,42,79,.035)}
*{box-sizing:border-box}html{font-size:16px}body{margin:0;background:var(--background);color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;line-height:1.55}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid #9ab7ff;outline-offset:3px}button{cursor:pointer}.shell{width:min(1180px,calc(100% - 64px));margin:auto}.topbar{background:var(--white);border-bottom:1px solid var(--line)}.topbar-inner{min-height:86px;display:flex;align-items:center;gap:44px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-size:1.125rem;white-space:nowrap}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:39px;height:39px;border-radius:11px;background:var(--blue);color:white;font-weight:800;font-size:1.2rem}.brand strong{font-weight:750}.topbar nav{display:flex;gap:8px}.nav-link{padding:10px 14px;font-size:.9375rem;font-weight:600;color:var(--muted);border-radius:8px}.nav-link.active{background:#edf2ff;color:var(--blue)}.nav-link:hover{text-decoration:none;background:#f3f6fc}.lab-label{font-size:.75rem;letter-spacing:.095em;font-weight:750;margin-left:auto;color:var(--muted)}.main{padding-top:44px;min-height:calc(100vh - 172px);padding-bottom:58px}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}.eyebrow{color:var(--blue);font-size:.75rem;font-weight:750;letter-spacing:.1em}.page-heading h1{margin:6px 0 7px;font-size:clamp(1.7rem,3vw,2.1rem);line-height:1.25;letter-spacing:-.025em}p{margin:0;color:var(--muted)}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border:1px solid transparent;border-radius:8px;font-size:.9375rem;font-weight:650;line-height:1.4;white-space:nowrap}.button:hover{text-decoration:none}.primary{background:var(--blue);color:#fff}.primary:hover{background:#1945b5}.secondary{border-color:#d7dfed;background:#fff;color:var(--ink)}.secondary:hover{background:#f5f7fc}.danger-outline{background:#fff;color:var(--red);border-color:#f4c6c3}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:26px}.stat{border:1px solid var(--line);border-radius:var(--radius);background:white;padding:22px 24px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:5px}.stat:first-child{border-top:3px solid var(--blue);padding-top:20px}.stat span{font-size:.875rem;color:var(--muted)}.stat strong{font-size:2rem;line-height:1.2;font-weight:750;font-variant-numeric:tabular-nums}.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.table-toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px;border-bottom:1px solid var(--line)}h2{font-size:1.125rem;line-height:1.4;margin:0;font-weight:700}.table-toolbar h2{display:flex;align-items:center;gap:10px;white-space:nowrap}.count{font-size:.875rem;color:var(--blue);font-weight:700;border-radius:6px;background:#edf2ff;padding:2px 8px}.search{display:flex;gap:8px;align-items:center}.search input{width:285px;min-height:44px;background:#f8fafc}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;font-size:.9375rem;text-align:left}th{padding:14px 24px;background:#f8fafc;color:#66738a;font-size:.875rem;font-weight:600;white-space:nowrap}td{padding:20px 24px;border-top:1px solid #edf0f5;vertical-align:middle}tbody tr:hover{background:#fbfcff}.mono{font-family:"SFMono-Regular",Consolas,monospace;font-size:.9375rem}.student-name{display:block;font-weight:650;overflow-wrap:anywhere}.secondary-text{display:block;color:var(--muted);font-size:.875rem;margin-top:3px;overflow-wrap:anywhere}.badge{display:inline-flex;font-weight:650;font-size:.8125rem;border-radius:6px;padding:4px 10px;white-space:nowrap}.badge-active{background:#e8f7f0;color:#126342}.badge-inactive{background:#edf0f5;color:#556176}.row-actions{display:flex;align-items:center;gap:14px;white-space:nowrap}.action{padding:3px 0;color:var(--blue);font-size:.875rem;font-weight:600;border:0;background:transparent}.action:hover{text-decoration:underline}.danger-text{color:var(--red)}.row-actions form{display:inline}.table-foot{padding:16px 24px;border-top:1px solid var(--line);font-size:.875rem;color:var(--muted)}.text-link{font-size:.9375rem;font-weight:600}.back-link{display:inline-block;margin-bottom:20px}.notice{padding:15px 18px;border:1px solid;border-radius:10px;font-size:.9375rem;margin-bottom:24px}.success{background:#eaf8f0;color:#136343;border-color:#c7ead6}.error{background:#fff2f1;color:var(--red);border-color:#f6d1cf}.form-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:24px;align-items:start}.form-card{padding:30px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.field{display:flex;flex-direction:column;gap:7px;min-width:0}.field.full{grid-column:1/-1}label{font-size:.9375rem;font-weight:650}label span{color:var(--red)}input,select{width:100%;min-height:46px;border:1px solid #ccd6e5;border-radius:8px;background:#fff;padding:10px 12px;color:var(--ink)}input::placeholder{color:#8090a6}input:focus,select:focus{border-color:var(--blue);outline:3px solid #e4ecff}input[aria-invalid=true],select[aria-invalid=true]{border-color:#db635d;background:#fffafa}.field small{font-size:.8125rem;color:var(--muted);line-height:1.45}.field-error{font-size:.875rem;color:var(--red);font-weight:550}.form-actions{display:flex;gap:12px;margin-top:30px;padding-top:24px;border-top:1px solid var(--line)}.note-card{padding:24px;background:#eaf0ff;border:1px solid #dbe5ff;border-radius:var(--radius)}.note-card h2{margin-top:9px}.note-card ul{padding-left:19px;font-size:.9375rem;color:#435577;margin:16px 0 22px}.note-card li{margin-bottom:12px}.empty{text-align:center;padding:64px 24px}.empty-symbol{display:block;font-size:2.7rem;color:#97a8c5;line-height:1;margin-bottom:18px}.empty h3{margin:0 0 8px;font-size:1.125rem}.error-page h1{font-size:2rem;margin:10px 0}.error-page .button{margin-top:24px}.detail-card{max-width:920px;padding:32px}.detail-header{display:flex;align-items:center;gap:18px;padding-bottom:26px;border-bottom:1px solid var(--line)}.detail-header .badge{margin-left:auto}.detail-header h2{font-size:1.4rem;overflow-wrap:anywhere}.avatar{background:#eaf0ff;color:var(--blue);display:grid;place-items:center;width:56px;height:56px;border-radius:14px;font-size:1.5rem;font-weight:750;flex-shrink:0}.muted{color:var(--muted)}.detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin:28px 0}.detail-grid dt{font-size:.875rem;color:var(--muted);margin-bottom:5px}.detail-grid dd{margin:0;font-weight:550;overflow-wrap:anywhere}.detail-actions{display:flex;gap:12px;padding-top:24px;border-top:1px solid var(--line)}.guide-intro{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:24px}.guide-step{padding:22px}.step-number{width:30px;height:30px;display:grid;place-items:center;background:#edf2ff;color:var(--blue);font-weight:750;border-radius:8px;margin-bottom:12px}.guide-step h2{margin-bottom:8px}.guide-step p{font-size:.9375rem}.rules-card{margin-bottom:26px}.rules-card h2{padding:22px 24px;border-bottom:1px solid var(--line)}.rules-table td{padding:14px 24px}.cases-table{min-width:820px}.cases-table td{vertical-align:top;padding:18px 22px}.cases-table th{padding-left:22px;padding-right:22px}.cases-table .case-id{white-space:nowrap;font-weight:700;color:var(--blue)}.cases-table .case-title{display:block;margin-bottom:5px;font-weight:650}.technique{font-size:.8125rem;color:var(--muted)}.instruction{padding:18px 24px;background:#f8fafc;border-bottom:1px solid var(--line);font-size:.9375rem;color:var(--muted)}.footer{padding-top:20px;padding-bottom:24px;display:flex;justify-content:space-between;gap:12px;font-size:.8125rem;color:var(--muted);border-top:1px solid var(--line)}.sr-only{position:absolute;clip:rect(0,0,0,0);width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden}
@media(max-width:1050px){.shell{width:calc(100% - 40px)}.lab-label{display:none}.form-layout{grid-template-columns:minmax(0,1fr) 240px}.table-toolbar{flex-wrap:wrap}th,td{padding-left:18px;padding-right:18px}.topbar-inner{gap:28px}}
@media(max-width:760px){.shell{width:calc(100% - 32px)}.topbar-inner{flex-wrap:wrap;gap:12px;padding-top:18px;padding-bottom:14px}.topbar nav{width:100%;gap:4px}.nav-link{padding:8px 12px;font-size:.875rem}.main{padding-top:28px}.page-heading{align-items:flex-start;flex-direction:column}.page-heading .button{width:100%}.stats{gap:10px}.stat{padding:16px 12px}.stat:first-child{padding-top:14px}.stat span{font-size:.8125rem}.stat strong{font-size:1.7rem}.table-toolbar{padding:18px}.search{width:100%;flex-wrap:wrap}.search input{flex:1;min-width:140px;width:auto}.search .text-link{margin-left:4px}.table-scroll table{min-width:790px}.form-layout{grid-template-columns:1fr}.form-card,.detail-card{padding:22px}.form-grid{grid-template-columns:1fr;gap:22px}.note-card{padding:22px}.form-actions .button{flex:1}.detail-grid{grid-template-columns:1fr}.detail-header{flex-wrap:wrap}.detail-header .badge{margin-left:0}.guide-intro{grid-template-columns:1fr}.guide-step{display:block}.footer{flex-direction:column}.table-scroll.rules-scroll table{min-width:580px}.table-toolbar h2{white-space:normal}}
.button{white-space:normal;text-align:center;min-width:0;overflow-wrap:anywhere}.topbar-inner,.topbar nav,.form-actions{flex-wrap:wrap}.brand{white-space:normal;min-width:0}.brand-mark{flex:0 0 39px;font-size:20px}.form-actions .button{flex:1 1 10rem}
@media print{body{background:#fff;color:#111}.topbar,.footer,.button,.back-link{display:none}.shell{width:100%}.main{padding:0}.card{box-shadow:none}.table-scroll{overflow:visible}table.cases-table{min-width:0;font-size:10pt}th,td,.cases-table td{padding:8px}.guide-intro{display:none}.page-heading h1{font-size:22pt}.rules-card{break-inside:avoid}tr{break-inside:avoid}}