@charset "utf-8";

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333333;
    background-color: #ffffff;
}

main {
    padding: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.banner {
    display: block;
    margin: 0;
    padding: 0;
    width: 100%;
    height: auto;
}

.thanh-xanh-mobile {
    display: none;
}

header {
    text-align: center;
}

header p {
    margin: 4px 0 0 0;
    font-size: 0.9em;
    color: #0011bb;
}

.header-container {
    display: flex;
    align-items: center;
    padding: 10px 0;
}

.logo {
    width: 80px;
    height: auto;
    margin-right: 15px;
}

.tieu-de-chinh {
    font-size: 40px;
    color: #0011bb;
    margin: 0;
}

.tieu-de-phu {
    color: #0011bb;
    text-align: center;
    margin: 0 auto;
}

.hamburger {
    display: none;
}

.thanh-dieu-huong {
    font-size: 15px;
    background-color: #0011bb;
    display: flex;
    justify-content: center;
    width: 100%;
    margin: 0;
    padding: 0;
}

.thanh-dieu-huong a {
    color: #ffffff;
    padding: 12px 24px;
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
}

.thanh-dieu-huong a:hover,
.thanh-dieu-huong a[aria-current="page"] {
    background-color: #ffff00;
    color: #0011bb;
}

.box {
    border: 1px solid rgba(51, 51, 51, 0.3);
    padding: 16px;
    background-color: rgba(0, 17, 187, 0.05);
    margin-bottom: 16px;
    border-radius: 5px;
}

.nut-mua {
    background-color: #0011bb;
    color: #ffffff;
    padding: 8px 16px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    border-radius: 4px;
}

.nut-mua:hover {
    color: #ffff00;
}

footer {
    background-color: #0011bb;
    color: #ffffff;
    text-align: center;
    padding: 12px;
    margin-top: 20px;
}
	.bang-du-lieu {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

	.bang-du-lieu th, 
	.bang-du-lieu td {
  	border: 1px solid #000;
    padding: 8px 12px; 
}

@media screen and (max-width: 768px) {
    .banner {
        display: none;
    }

    .thanh-xanh-mobile {
        display: block;
        background-color: #0011bb;
        height: 40px;
        width: 100%;
    }
.thanh-xanh-mobileee {
        display: block;
        background-color: #0011bb;
        height: 10px;
        width: 100%;
    }

    .header-container {
        justify-content: space-between;
        padding: 10px;
    }

    .logo {
        width: 50px;
        margin-right: 10px;
    }

    .tieu-de-chinh {
        font-size: 24px;
        white-space: nowrap;
    }

    .hamburger {
        display: block;
        font-size: 24px;
        background: none;
        border: 1px solid #0011bb;
        color: #0011bb;
        border-radius: 4px;
        padding: 4px 10px;
        cursor: pointer;
    }

    .thanh-dieu-huong {
        display: none;
        flex-direction: column;
    }

    .thanh-dieu-huong.active {
        display: flex;
    }

    .thanh-dieu-huong a {
        width: 100%;
        box-sizing: border-box;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        padding: 12px 15px;
        text-align: left;
    }