html, body {
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.nen_mo {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
}

.nen_mo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.nen_mo::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(64, 117, 210, 0.381);
}

header {
    position: fixed;
    display: grid;

    top: 0;
    left: 0;
    width: 100%;
    height: 12%;

    grid-template-columns: 1fr 16fr;
    background-color:rgb(38, 71, 221);
    color: white;
    z-index: 1;
}

.logo img {
    position: relative;
    top: -38%;
    left: -45%;
    width: 160%;
    height: 160%;
    object-fit: contain;
}

.content_hd h2{
    font-size: 25px;
}
.content_hd p{
    position: absolute;
    top: 40px;
}

.content {
    position: absolute;
    left: 10%;
    right: 10%;
    top: 15%;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 30px; 
}

.section_wrapper {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.title_box {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
}

.ngach {
    width: 6px;
    height: 30px;
    background-color: white;
    border-radius: 3px;
}

.title_icon {
    width: 35px;
    height: 35px;
    object-fit: contain;
}

.tieu_de {
    margin: 0;
    font-size: 22px;
    font-weight: bold;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.button_grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.btn_item {
    background-color: white;
    border-radius: 15px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: #0b3d91;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.btn_item:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.btn_icon {
    width: 50px;
    height: 50px;
    object-fit: contain;
    background-color: #e0f0ff;
    border-radius: 10px;
    padding: 5px;
}

.btn_content {
    display: flex;
    flex-direction: column;
}

.btn_title {
    font-size: 16px;
    font-weight: bold;
    margin: 0 0 5px 0;
}

.btn_desc {
    font-size: 11px;
    color: #555;
    margin: 0;
}