:root { --primary:#2563eb; --bg:#f6f7fb; --card:#fff; --text:#111827; --muted:#6b7280; --danger:#ef4444; --warn:#f59e0b; --ok:#16a34a; }
*{box-sizing:border-box} body{margin:0;background:var(--bg);color:var(--text);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;}
a{color:var(--primary);text-decoration:none}
.container{max-width:1200px;margin:24px auto;padding:0 16px}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:10}
.topbar .brand{font-weight:700}
.topbar nav a{margin-right:12px}
.topbar .logout{color:#ef4444}
.card{background:var(--card);border:1px solid #e5e7eb;border-radius:10px;padding:16px;margin-bottom:16px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:10px;border-bottom:1px solid #eee;text-align:left;font-size:14px}
.table th{background:#f9fafb;cursor:pointer}
.controls{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
input[type="text"],input[type="email"],input[type="tel"],input[type="date"],select,textarea{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:8px;background:#fff}
label{font-size:12px;color:var(--muted);display:block;margin-bottom:4px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-1{grid-template-columns:1fr}
button,.btn{background:var(--primary);color:#fff;border:none;padding:10px 14px;border-radius:8px;cursor:pointer}
.btn.secondary{background:#6b7280}
.btn.small{padding:6px 10px;font-size:13px}
.actions a{margin-right:8px}
.footer{text-align:center;color:#9ca3af;padding:24px}
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#dbeafe,#f3e8ff)}
.login-card{background:#fff;padding:24px;border-radius:12px;width:340px;box-shadow:0 10px 30px rgba(0,0,0,.08)}
.login-card h3{margin-top:0}
.login-card label{margin-top:12px}
.login-card input{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:8px}
.login-card button{margin-top:14px;width:100%}
.login-card .error{color:var(--danger);margin-top:8px;font-size:13px}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px}
.badge.success{background:#dcfce7;color:#166534}
.badge.warn{background:#fef3c7;color:#92400e}
.badge.muted{background:#e5e7eb;color:#374151}
.badge.danger{background:#fee2e2;color:#991b1b}
.row-overdue{background:#fff1f2}
.row-soon{background:#fffbeb}
.stat{display:flex;justify-content:space-between;align-items:center}
.stat-k{color:#6b7280}
.stat-v{font-size:28px;font-weight:800}
#alerts .alert{padding:10px 12px;border-radius:10px;margin-bottom:10px}
.alert.warn{background:#fffbeb;border:1px solid #fde68a}
.alert.danger{background:#fef2f2;border:1px solid #fecaca}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid,.grid-2,.grid-3{grid-template-columns:1fr}}