:root{--navy:#123b52;--navy2:#0b2b3d;--gold:#c7a451;--paper:#fbfaf6;--ink:#17313f;--muted:#6b7b84;--line:#e7e2d6;--danger:#a63d40;--warn:#9a6a16;--ok:#287052;--card:#ffffff}*{box-sizing:border-box}body,html{margin:0;padding:0;background:#f4f6f7;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Arial,sans-serif}a{text-decoration:none;color:inherit}button,input,select,textarea{font:inherit}button{cursor:pointer}.shell{min-height:100vh;display:grid;grid-template-columns:250px 1fr}.sidebar{background:linear-gradient(180deg,var(--navy2),var(--navy));color:white;padding:24px 18px;position:-webkit-sticky;position:sticky;top:0;height:100vh}.brand{font-weight:800;letter-spacing:2px;font-size:20px}.brand small{display:block;color:#d9c48b;font-size:10px;letter-spacing:1.5px;margin-top:5px}.nav{margin-top:32px;display:grid;grid-gap:7px;gap:7px}.nav a{padding:11px 12px;border-radius:9px;color:#dce7ec;font-size:14px}.nav a.active,.nav a:hover{background:rgba(255,255,255,.1);color:white}.main{min-width:0}.topbar{height:70px;background:white;border-bottom:1px solid #e8ecee;display:flex;align-items:center;justify-content:space-between;padding:0 30px;position:-webkit-sticky;position:sticky;top:0;z-index:5}.content{padding:28px 30px 50px;max-width:1500px;margin:auto}.h1{font-size:27px;margin:0}.sub{color:var(--muted);margin-top:5px;font-size:14px}.grid{display:grid;grid-gap:18px;gap:18px}.stats{grid-template-columns:repeat(4,minmax(0,1fr));margin:24px 0}.card{background:var(--card);border:1px solid #e5e9eb;border-radius:14px;padding:20px;box-shadow:0 2px 8px rgba(17,45,60,.04)}.stat b{font-size:28px;display:block;margin-top:9px}.stat span{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.8px}.actions{display:flex;gap:10px;flex-wrap:wrap}.btn{border:0;border-radius:9px;padding:10px 14px;background:var(--navy);color:white;font-weight:650}.btn.secondary{background:white;color:var(--navy);border:1px solid #cbd7dc}.btn.gold{background:var(--gold);color:#172b35}.btn.danger{background:var(--danger)}.btn:disabled{opacity:.5;cursor:not-allowed}.tablewrap{overflow:auto}.table{width:100%;border-collapse:collapse;font-size:13px}.table th{text-align:left;color:#65757d;font-size:11px;text-transform:uppercase;letter-spacing:.6px;border-bottom:1px solid #e6eaec;padding:11px 9px}.table td{padding:12px 9px;border-bottom:1px solid #edf0f1;vertical-align:middle}.table tr:hover td{background:#fafcfc}.badge{display:inline-block;padding:4px 8px;border-radius:999px;font-size:11px;font-weight:700}.valid{background:#e6f4ed;color:var(--ok)}.revoked{background:#f9e7e7;color:var(--danger)}.suspended{background:#fff3d9;color:var(--warn)}.formgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:16px;gap:16px}.field label{display:block;font-size:12px;font-weight:700;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;border:1px solid #ccd6da;border-radius:9px;padding:10px 11px;background:white;color:var(--ink)}.field textarea{min-height:90px;resize:vertical}.full{grid-column:1/-1}.notice{padding:11px 13px;border-radius:9px;background:#eef5f8;color:#31596c;font-size:13px}.error{background:#fbeaea;color:#8b3134}.success{background:#e8f5ee;color:#276449}.loginpage{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0b2b3d,#164f6b)}.loginbox{width:min(430px,92vw);background:white;padding:34px;border-radius:18px;box-shadow:0 25px 70px rgba(0,0,0,.25)}.loginbrand{text-align:center;margin-bottom:25px}.loginbrand b{font-size:23px;letter-spacing:2px}.loginbrand small{display:block;color:#9a7b32;margin-top:5px}.preview{background:#fffdf8;border:1px solid #d8cba9;padding:22px;text-align:center;min-height:310px;display:grid;align-content:center}.preview h2{letter-spacing:2px;color:var(--navy);font-family:Georgia,serif}.preview .person{font:700 27px Georgia,serif;border-bottom:1px solid var(--gold);padding-bottom:8px;margin:10px auto;width:70%}.preview .course{font:700 18px Georgia,serif;color:var(--navy);margin:10px}.modalback{position:fixed;inset:0;background:rgba(7,25,34,.55);display:grid;place-items:center;z-index:20;padding:20px}.modal{background:white;border-radius:14px;width:min(520px,95vw);padding:24px}@media(max-width:900px){.shell{grid-template-columns:1fr}.sidebar{display:none}.stats{grid-template-columns:repeat(2,1fr)}.formgrid{grid-template-columns:1fr}.content{padding:20px}.topbar{padding:0 20px}}