:root{--primary:#4f46e5;--primary-hover:#4338ca;--bg-dark:#0f172a;--bg-card:#1e293b;--text-light:#f8fafc;--text-muted:#94a3b8;--accent:#38bdf8;--success:#10b981;--danger:#ef4444;--warning:#f59e0b}body{background-color:var(--bg-dark);color:var(--text-light);margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}.container{max-width:1200px;margin:0 auto;padding:2rem}.card{background:var(--bg-card);border:1px solid #ffffff0d;border-radius:16px;margin-bottom:2rem;padding:2rem;box-shadow:0 10px 25px -5px #00000080}h1,h2,h3{letter-spacing:-.025em;margin-top:0;font-weight:600}.btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:500;transition:all .2s;display:inline-flex}.btn:hover{background:var(--primary-hover);transform:translateY(-1px)}.btn.success{background:var(--success)}.btn.danger{background:var(--danger)}.btn.warning{background:var(--warning)}.btn.ghost{border:1px solid var(--text-muted);color:var(--text-light);background:0 0}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}table{border-collapse:collapse;width:100%;margin-top:1rem}th,td{text-align:left;border-bottom:1px solid #ffffff1a;padding:1rem}th{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.875rem;font-weight:500}tr:hover td{background:#ffffff05}input,textarea,select{color:#fff;background:#0003;border:1px solid #ffffff1a;border-radius:8px;width:100%;margin-bottom:1rem;padding:.75rem 1rem;font-family:inherit;font-size:1rem;transition:border-color .2s}input:focus,textarea:focus{border-color:var(--primary);outline:none}.badge{text-transform:uppercase;border-radius:9999px;padding:.25rem .75rem;font-size:.75rem;font-weight:600}.badge.on_time{color:#34d399;background:#10b98133}.badge.late{color:#fbbf24;background:#f59e0b33}.badge.absent{color:#f87171;background:#ef444433}.grid-2{grid-template-columns:1fr 1fr;gap:2rem;display:grid}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;margin-bottom:2rem;display:grid}.stat-card{background:#ffffff08;border:1px solid #ffffff0d;border-radius:12px;padding:1.5rem}.stat-value{color:var(--text-light);margin-top:.5rem;font-size:2rem;font-weight:700}.qr-container{text-align:center;background:#fff;border-radius:16px;padding:2rem;display:inline-block}