body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #111;
    color: white;
}

header {
    background: #1db954;
    padding: 20px;
    text-align: center;
}

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

h2 {
    border-bottom: 2px solid #1db954;
    padding-bottom: 5px;
}


.banner {
    width: 100%;
    border-radius: 10px;
}


.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin-top: 15px;
}

.video-container iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    border: none;
}


.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

table, th, td {
    border: 1px solid #555;
}

th, td {
    padding: 10px;
    text-align: center;
}


form {
    margin-top: 20px;
    background: #222;
    padding: 20px;
    border-radius: 10px;
}

input, button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    border: none;
    border-radius: 5px;
}

.radio-group label,
.checkbox-group label {
    display: block;
    margin-top: 8px;
}

button {
    background: #1db954;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #17a74a;
}


@media (max-width:600px) {
    header h1 {
        font-size: 24px;
    }
}