:root{--blue:#263790;--blue2:#3566ff;--orange:#ff5f25;--dark:#0e1734;--muted:#687188;--bg:#eef5ff;--card:#fff;--green:#15a65b;--red:#e84555;--yellow:#f3b300}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:linear-gradient(135deg,#f6f9ff,#e9f2ff);color:#172033}.layout{display:flex;min-height:100vh}.sidebar{width:240px;background:#fff;border-right:1px solid #dce7f6;padding:18px;position:sticky;top:0;height:100vh}.brand{background:linear-gradient(135deg,var(--blue2),#5191ff);border-radius:18px;padding:16px;color:#fff;display:flex;gap:12px;align-items:center;margin-bottom:20px}.brand img{width:56px;background:#fff;border-radius:8px;padding:5px}.nav a{display:block;padding:13px 14px;margin:8px 0;border-radius:12px;color:#1f2b45;text-decoration:none;font-weight:700}.nav a.active,.nav a:hover{background:linear-gradient(135deg,var(--blue2),#4a91ff);color:#fff}.main{flex:1;padding:24px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.logo-main{height:58px;max-width:260px;object-fit:contain}.card{background:rgba(255,255,255,.92);border:1px solid #dce7f6;border-radius:18px;padding:20px;box-shadow:0 18px 45px rgba(39,55,144,.08);margin-bottom:18px}.welcome{background:linear-gradient(90deg,#d7f2e4,#eff7ff);border:0}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.stat h2{font-size:34px;margin:6px 0}.stat small{color:var(--muted)}.stat:nth-child(2){border-top:5px solid var(--green)}.stat:nth-child(3){border-top:5px solid var(--red)}.stat:nth-child(4){border-top:5px solid var(--yellow)}table{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden}th,td{padding:12px;border-bottom:1px solid #edf2f7;text-align:left;vertical-align:top}th{background:#f4f7ff;color:#2b3760}.btn{display:inline-block;border:0;background:var(--blue2);color:#fff;padding:10px 14px;border-radius:10px;text-decoration:none;font-weight:800;cursor:pointer}.btn.orange{background:var(--orange)}.btn.red{background:var(--red)}.btn.light{background:#eef4ff;color:var(--blue)}.badge{padding:6px 10px;border-radius:999px;font-weight:800;font-size:12px;background:#eef4ff;color:var(--blue)}.badge.pass{background:#dcfce7;color:#166534}.badge.fail{background:#fee2e2;color:#991b1b}.badge.process{background:#fef3c7;color:#92400e}input,select,textarea{width:100%;padding:12px;border:1px solid #d6e3f5;border-radius:12px;margin:6px 0 14px;background:#fff}label{font-weight:800;color:#2c3550}.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.hero{max-width:900px;margin:45px auto}.login-card{max-width:440px;margin:45px auto}.exam-shell{display:grid;grid-template-columns:1fr 280px;gap:18px}.question{display:none}.question.active{display:block}.option{display:block;padding:12px;border:1px solid #d9e6f7;border-radius:12px;margin:10px 0;background:#fff}.timer{font-size:28px;font-weight:900;color:var(--orange)}#camera{width:100%;border-radius:14px;background:#111;min-height:180px}.qnav{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.qnav button{border:0;padding:10px;border-radius:10px;background:#edf4ff;font-weight:800}.qnav button.done{background:#d1fae5}.qnav button.active{background:var(--orange);color:#fff}.answer-row.correct{background:#ecfdf5}.answer-row.wrong{background:#fff1f2}.progress{height:10px;background:#e5efff;border-radius:10px;overflow:hidden}.progress span{height:100%;background:linear-gradient(90deg,var(--blue2),var(--orange));display:block}.alert{padding:12px;border-radius:12px;background:#eef6ff;margin-bottom:14px}.danger{background:#fff1f2;color:#991b1b}.ok{background:#ecfdf5;color:#166534}@media(max-width:900px){.layout{display:block}.sidebar{position:relative;width:auto;height:auto}.grid,.formgrid,.exam-shell{grid-template-columns:1fr}.main{padding:14px}}