:root{--nav:#111827;--primary:#2563eb;--success:#15803d;--danger:#b91c1c;--muted:#64748b;--bg:#f1f5f9}
*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:var(--bg);color:#1e293b}
nav{background:var(--nav);color:white;padding:14px 5%;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
nav .brand{font-size:20px;font-weight:700;margin-right:auto}nav a{color:#dbeafe;text-decoration:none}nav a:hover{color:white}
.logout{display:inline}.logout button{background:none;border:0;color:#fecaca;cursor:pointer;font-size:14px}
.container{width:min(1180px,92%);margin:28px auto}.login-card{width:min(420px,92%);margin:80px auto}
.card{background:white;border-radius:10px;padding:20px;box-shadow:0 2px 8px rgba(15,23,42,.08);margin-bottom:20px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px}.stat strong{display:block;font-size:30px;color:var(--primary);margin-top:8px}
h1,h2,h3{margin-top:0}table{width:100%;border-collapse:collapse;background:white}th,td{text-align:left;padding:12px;border-bottom:1px solid #e2e8f0}th{background:#f8fafc}
input,select{width:100%;padding:10px;border:1px solid #cbd5e1;border-radius:6px;margin:5px 0 12px}
label{font-weight:600;font-size:14px}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px}.actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
button,.btn{display:inline-block;border:0;border-radius:6px;padding:9px 14px;background:var(--primary);color:white;text-decoration:none;cursor:pointer}
.btn-danger{background:var(--danger)}.btn-success{background:var(--success)}.btn-secondary{background:#475569}
.alert{padding:12px;border-radius:6px;margin-bottom:16px}.alert-success{background:#dcfce7;color:#166534}.alert-error{background:#fee2e2;color:#991b1b}
.badge{display:inline-block;padding:4px 8px;border-radius:999px;background:#e2e8f0;font-size:12px}.balance{font-size:28px;font-weight:700;color:var(--success)}
.muted{color:var(--muted);font-size:14px}.table-wrap{overflow-x:auto}.event-card{border-left:4px solid var(--primary)}
footer{text-align:center;color:var(--muted);padding:30px}@media(max-width:650px){th,td{padding:8px;font-size:13px}}