*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:#f4f7f6;color:#17221e}.login{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#eaf4ef,#f7faf9)}.login-card{width:min(420px,100%);background:#fff;border-radius:20px;padding:32px;box-shadow:0 16px 45px rgba(0,0,0,.08)}.brand{font-weight:800;font-size:22px}.muted{color:#708078}.field{margin:16px 0}.field label{display:block;font-size:14px;font-weight:700;margin-bottom:7px}.field input,.field select,.field textarea{width:100%;padding:12px 13px;border:1px solid #d9e1dd;border-radius:10px;font:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:10px;padding:11px 16px;font-weight:700;cursor:pointer;background:#176b4d;color:#fff}.btn.secondary{background:#e9f1ed;color:#176b4d}.error{background:#fff0f0;color:#a62b2b;padding:10px 12px;border-radius:9px}.app{display:flex;min-height:100vh}.sidebar{width:245px;background:#123f31;color:#fff;padding:22px 16px}.brand small{display:block;font-size:11px;opacity:.7;margin-top:4px}.nav{margin-top:28px}.nav a{display:block;color:#d9e9e2;text-decoration:none;padding:11px 12px;border-radius:9px;margin:4px 0}.nav a:hover,.nav a.active{background:#1d5e48;color:#fff}.main{flex:1;padding:28px;min-width:0}.topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:24px}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:#fff;border:1px solid #e3eae6;border-radius:15px;padding:20px}.card .value{font-size:28px;font-weight:800;margin-top:8px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:20px}.class-card{cursor:pointer}.progress{height:8px;background:#e7eeeb;border-radius:20px;overflow:hidden;margin-top:12px}.progress span{display:block;height:100%;background:#2b8a68}.table-wrap{overflow:auto;background:#fff;border:1px solid #e3eae6;border-radius:15px;margin-top:20px}.table{width:100%;border-collapse:collapse;min-width:650px}.table th,.table td{padding:13px 15px;border-bottom:1px solid #edf1ef;text-align:left}.table th{background:#f7faf8;font-size:13px}.badge{display:inline-block;padding:4px 8px;border-radius:20px;background:#e8f4ee;color:#176b4d;font-size:12px;font-weight:700}.userbox{font-size:13px}.actions{display:flex;gap:8px;flex-wrap:wrap}.section-title{margin-top:28px}.mobile{display:none}@media(max-width:900px){.cards{grid-template-columns:repeat(2,1fr)}.grid{grid-template-columns:1fr 1fr}.sidebar{width:210px}}@media(max-width:650px){.app{display:block}.sidebar{width:100%;padding:14px}.nav{display:flex;overflow:auto;margin-top:12px}.nav a{white-space:nowrap}.main{padding:18px}.cards,.grid{grid-template-columns:1fr}.topbar{align-items:flex-start;flex-direction:column}}