* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f6f9;
    color: #202938;
}

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 240px;
    background: #172033;
    padding: 25px 15px;
}

.logo {
    color: #ffffff;
    font-size: 20px;
    font-weight: bold;
    padding: 10px;
    margin-bottom: 30px;
}

.menu a {
    display: block;
    color: #d9dfeb;
    text-decoration: none;
    padding: 12px 15px;
    margin-bottom: 5px;
    border-radius: 5px;
}

    .menu a:hover {
        background: #2c3951;
        color: #ffffff;
    }

.main {
    margin-left: 240px;
    min-height: 100vh;
}

.topbar {
    height: 65px;
    background: #ffffff;
    border-bottom: 1px solid #e1e5eb;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
}

.content {
    padding: 30px;
}

/* Page heading */

.page-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

    .page-title h2 {
        margin: 0;
        font-size: 28px;
    }

    .page-title p {
        margin-top: 7px;
        color: #6c757d;
    }

/* Dashboard */

.dashboard-cards {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
}

.dashboard-card {
    flex: 1;
    background: #ffffff;
    border-radius: 8px;
    padding: 22px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

    .dashboard-card .title {
        color: #6c757d;
        font-size: 14px;
    }

    .dashboard-card .value {
        font-size: 30px;
        font-weight: bold;
        margin-top: 10px;
    }

/* Cards */

.card {
    background: #ffffff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    margin-bottom: 25px;
}

/* Tables */

.table-container {
    background: #ffffff;
    border-radius: 8px;
    padding: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

    table th {
        background: #f5f7fa;
        text-align: left;
        padding: 13px;
        border-bottom: 1px solid #ddd;
    }

    table td {
        padding: 13px;
        border-bottom: 1px solid #eee;
    }

    table tr:hover {
        background: #fafafa;
    }

/* Buttons */

.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 5px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

    .btn-primary:hover {
        background: #1d4ed8;
    }

.btn-secondary {
    background: #6b7280;
    color: white;
}

/* Forms */

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 5px;
    font-size: 14px;
}

.form-group {
    margin-bottom: 18px;
}

    .form-group label {
        display: block;
        margin-bottom: 6px;
        font-weight: bold;
    }

/* Status */

.badge {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 12px;
    font-size: 12px;
}

.badge-success {
    background: #dcfce7;
    color: #166534;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-primary {
    background: #dbeafe;
    color: #1e40af;
}

/* QR */

.qr {
    width: 180px;
    height: 180px;
    margin: auto;
    background: repeating-conic-gradient( #111 0 25%, #fff 0 50% ) 50% / 18px 18px;
    border: 10px solid #ffffff;
    box-shadow: 0 0 0 1px #ddd;
}

/* Responsive */

@media screen and (max-width: 900px) {

    .sidebar {
        width: 200px;
    }

    .main {
        margin-left: 200px;
    }

    .dashboard-cards {
        display: block;
    }

    .dashboard-card {
        margin-bottom: 15px;
    }
}