:root{
 --navy:#0b1f3a;--blue:#2563eb;--bg:#f5f7fb;--card:#fff;--text:#172033;
 --muted:#64748b;--border:#e2e8f0;--danger:#dc2626;--success:#16a34a;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif}
a{color:inherit;text-decoration:none}
.app{min-height:100vh;display:flex}
.sidebar{width:255px;background:var(--navy);color:#fff;display:flex;flex-direction:column;position:fixed;inset:0 auto 0 0}
.brand{display:flex;align-items:center;gap:11px;padding:22px 20px;border-bottom:1px solid rgba(255,255,255,.1)}
.brand-center{justify-content:center;border:0;padding:0 0 28px}
.brand-mark{width:40px;height:40px;border-radius:11px;background:#2563eb;display:grid;place-items:center;font-weight:800;font-size:20px}
.brand strong{display:block}.brand small{display:block;color:#9fb0c8;margin-top:2px}
.sidebar nav{padding:18px 12px;display:grid;gap:5px}.sidebar nav a,.sidebar-bottom a{padding:11px 13px;border-radius:9px;color:#dbe7f7}.sidebar nav a:hover,.sidebar-bottom a:hover{background:rgba(255,255,255,.08)}
.sidebar-bottom{margin-top:auto;padding:15px 12px;border-top:1px solid rgba(255,255,255,.1)}.admin-mini{font-size:13px;color:#b9c7da;padding:8px 13px}
.main{margin-left:255px;width:calc(100% - 255px);min-height:100vh}
.topbar{height:72px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 30px}.topbar strong{display:block}.top-user{font-size:13px;color:var(--muted)}
.content{padding:30px;max-width:1500px;margin:auto}.page-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.page-head h1{margin:0 0 5px;font-size:28px}.page-head p{margin:0;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-bottom:22px}.stat{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px;box-shadow:0 4px 16px rgba(15,23,42,.03)}.stat span{display:block;color:var(--muted);font-size:13px}.stat b{font-size:30px;margin-top:7px;display:block}
.card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px;margin-bottom:20px;box-shadow:0 4px 16px rgba(15,23,42,.03)}.card.narrow{max-width:520px}.card h2{font-size:18px;margin:0 0 6px}.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px}.card-head p{margin:0;color:var(--muted);font-size:13px}
.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;font-size:14px}th,td{padding:12px 10px;border-bottom:1px solid var(--border);text-align:left;white-space:nowrap}th{font-size:12px;color:var(--muted);text-transform:uppercase}code{background:#f1f5f9;padding:4px 7px;border-radius:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:9px;padding:10px 14px;font-weight:600;cursor:pointer;font-size:14px}.btn-primary{background:var(--blue);color:#fff}.btn-dark{background:#172033;color:#fff}.btn-light{background:#f1f5f9;color:#334155}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:7px 10px;font-size:12px}.btn-block{width:100%;margin-top:18px}
.input{width:100%;border:1px solid #cbd5e1;background:#fff;border-radius:9px;padding:11px 12px;margin:7px 0 16px;font:inherit}label{font-size:13px;font-weight:700}
.alert{padding:13px 15px;border-radius:10px;margin-bottom:18px}.alert-success{background:#dcfce7;color:#166534}.alert-danger{background:#fee2e2;color:#991b1b}
.badge{display:inline-block;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:700}.badge-disponible{background:#dbeafe;color:#1d4ed8}.badge-activa{background:#dcfce7;color:#166534}.badge-vencida{background:#fef3c7;color:#92400e}.badge-revocada{background:#fee2e2;color:#991b1b}
.filters{display:flex;gap:10px;align-items:center;margin-bottom:18px}.filters .input{margin:0;max-width:280px}
.generated{background:#ecfdf5;border:1px solid #86efac;border-radius:14px;padding:22px;margin-bottom:20px}.generated span,.generated small{display:block;color:#166534}.generated strong{display:block;font-size:27px;letter-spacing:2px;margin:8px 0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}.detail{display:flex;justify-content:space-between;gap:20px;padding:12px 0;border-bottom:1px solid var(--border)}.detail span{color:var(--muted)}
.muted{color:var(--muted)}.footer{text-align:center;color:#94a3b8;font-size:12px;padding:25px}
.auth-body{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#0b1f3a,#173b69);padding:20px}.auth-card{width:min(430px,100%);background:#fff;border-radius:18px;padding:32px;box-shadow:0 20px 60px rgba(0,0,0,.2)}.auth-card h1{margin:0 0 8px}.auth-card form{margin-top:25px}.auth-footer{text-align:center;color:#94a3b8;font-size:12px;margin-top:25px}
@media(max-width:1050px){.stats{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:1fr}}
@media(max-width:750px){.sidebar{position:static;width:100%;min-height:auto}.app{display:block}.main{margin:0;width:100%}.sidebar nav{grid-template-columns:repeat(2,1fr)}.sidebar-bottom{margin:0}.stats{grid-template-columns:repeat(2,1fr)}.page-head{align-items:flex-start;flex-direction:column}.filters{flex-wrap:wrap}.top-user{display:none}}