body {
    background-color: #f4f6f9;
    font-family: 'Segoe UI', Arial, sans-serif;
}

.top-navbar {
    background: linear-gradient(90deg, #0d6efd, #0a58ca);
    padding: 0.7rem 1.5rem;
}

.sidebar {
    width: 220px;
    min-height: calc(100vh - 56px);
    background-color: #1e2a3a;
    padding-top: 1rem;
}

.sidebar a {
    display: block;
    color: #c9d3de;
    padding: 0.75rem 1.25rem;
    text-decoration: none;
    font-size: 0.95rem;
    border-left: 3px solid transparent;
}

.sidebar a:hover, .sidebar a.active {
    background-color: #263548;
    color: #fff;
    border-left: 3px solid #0d6efd;
}

.main-content {
    width: 100%;
}

.card-stat {
    border: none;
    border-radius: 12px;
    color: #fff;
    padding: 1.5rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.bg-blue { background: linear-gradient(135deg, #0d6efd, #4d94ff); }
.bg-green { background: linear-gradient(135deg, #198754, #3fce8f); }
.bg-orange { background: linear-gradient(135deg, #fd7e14, #ffb066); }
.bg-purple { background: linear-gradient(135deg, #6f42c1, #a377e0); }

.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d6efd, #6f42c1);
}

.login-card {
    width: 100%;
    max-width: 400px;
    border-radius: 14px;
    border: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

table.table thead {
    background-color: #eef2f7;
}