:root{
  --sidebar-bg:#0f172a;--sidebar-bg2:#1e293b;--accent:#1e88e5;--accent2:#42a5f5;
  --bg:#f1f5f9;--card:#fff;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text)}
.layout{display:flex;min-height:100vh}
.sidebar{width:250px;background:linear-gradient(180deg,var(--sidebar-bg),var(--sidebar-bg2));color:#cbd5e1;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;transition:.3s;z-index:1000}
.sidebar .brand{padding:18px;display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.08)}
.sidebar .brand img{width:42px;height:42px;border-radius:8px;background:#fff;padding:2px;object-fit:contain}
.sidebar .brand b{display:block;color:#fff;letter-spacing:1px}
.sidebar .brand small{color:#94a3b8;font-size:11px}
.sidebar nav{padding:10px 8px;display:flex;flex-direction:column;gap:2px}
.sidebar nav a{color:#cbd5e1;padding:10px 14px;border-radius:8px;text-decoration:none;font-size:14px;display:flex;align-items:center;gap:10px;transition:.2s}
.sidebar nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.sidebar nav a.active{background:linear-gradient(90deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 4px 12px rgba(30,136,229,.35)}
.sidebar nav a i{font-size:18px;width:22px;text-align:center}
.main{margin-left:250px;flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{background:#fff;height:60px;display:flex;align-items:center;padding:0 24px;justify-content:space-between;box-shadow:0 1px 3px rgba(0,0,0,.05);position:sticky;top:0;z-index:100}
.page-title{font-weight:600;font-size:18px}
.content{padding:24px;flex:1}
.card{border:1px solid var(--border);border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.stat-card{background:#fff;border-radius:12px;padding:20px;border-left:4px solid var(--accent);box-shadow:0 1px 3px rgba(0,0,0,.05);transition:.2s}
.stat-card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(0,0,0,.08)}
.stat-card .label{color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.5px}
.stat-card .value{font-size:26px;font-weight:700;margin-top:4px}
.stat-card.green{border-left-color:#10b981}
.stat-card.orange{border-left-color:#f59e0b}
.stat-card.red{border-left-color:#ef4444}
.stat-card.purple{border-left-color:#8b5cf6}
.btn-primary{background:var(--accent);border-color:var(--accent)}
.btn-primary:hover{background:#1565c0;border-color:#1565c0}
.table thead th{background:#f8fafc;color:#475569;font-size:12px;text-transform:uppercase;letter-spacing:.5px;border-bottom:2px solid var(--border)}
.badge-estado{padding:4px 10px;border-radius:20px;font-size:11px;font-weight:600}
.badge-PENDIENTE{background:#fef3c7;color:#92400e}
.badge-ENVIADA{background:#dbeafe;color:#1e40af}
.badge-ACEPTADA{background:#d1fae5;color:#065f46}
.badge-RECHAZADA{background:#fee2e2;color:#991b1b}
.badge-CONVERTIDA{background:#e9d5ff;color:#6b21a8}
.badge-EMITIDA{background:#d1fae5;color:#065f46}
.badge-ANULADA{background:#fee2e2;color:#991b1b}
.badge-ABIERTA{background:#d1fae5;color:#065f46}
.badge-CERRADA{background:#e5e7eb;color:#374151}
.badge-FINALIZADA{background:#d1fae5;color:#065f46}
.badge-EN_PROCESO{background:#dbeafe;color:#1e40af}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0}
}
/* Login */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#0f172a,#1e3a8a)}
.login-card{background:#fff;border-radius:16px;padding:40px;width:100%;max-width:420px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.login-card .logo{text-align:center;margin-bottom:20px}
.login-card .logo img{width:90px}