body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background: #35424a;
    color: #ffffff;
    padding: 10px 0;
    text-align: center;
}

h1 {
    margin: 0;
    font-size: 2.5em;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}

.upload-section {
    background: #ffffff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

.upload-section input[type="file"] {
    margin: 10px 0;
}

.button {
    display: inline-block;
    font-size: 1em;
    color: #ffffff;
    background: #35424a;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.button:hover {
    background: #2c3e50;
}

.footer {
    text-align: center;
    padding: 20px;
    background: #35424a;
    color: #ffffff;
    position: relative;
    bottom: 0;
    width: 100%;
}

@media (max-width: 768px) {
    .container {
        width: 95%;
    }

    h1 {
        font-size: 2em;
    }
}