/* Nền xám nhạt để card trắng nổi lên */
body {
    background-color: #f4f7f6;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Tùy chỉnh Card */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.04);
    transition: all 0.3s ease;
}

    .card:hover {
        box-shadow: 0 8px 15px rgba(0,0,0,0.08);
    }

/* Nút bấm bo tròn */
.btn {
    border-radius: 8px;
    padding: 8px 20px;
    font-weight: 500;
    transition: all 0.2s;
}

    .btn i {
        margin-right: 5px;
    }

/* Form Input mềm mại */
.form-control {
    border-radius: 8px;
    padding: 10px 15px;
    border: 1px solid #dee2e6;
}

    .form-control:focus {
        box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
        border-color: #3498db;
    }

/* Căn chỉnh Label */
.control-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 5px;
}