styles.css

body {
    font-family: 'Avenir', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
    text-align: center;
}

#titleContainer {
    margin-bottom: 20px;
}

h1 {
    color: #333;
    font-size: 26px;
    margin: 0;
}

input[type="file"] {
    display: none;
}

label {
    background-color: #179ef8;
    color: #fff;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
    margin-bottom: 10px;
    display: inline-block;
}

button {
    background-color: #2ecc71;
    color: #fff;
    padding: 12px 20px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    margin: 0 15px;
}

.button-container {
    display: flex;
    justify-content: center;
    margin-top: 10px;
}

#downloadBtn {
    background-color: #f9b406;
    margin: 0;
}

#loader,
#doneMessage {
    display: none;
    color: #333;
    font-size: 18px;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    border-radius: 10px;
}
#loader {
    background-color:#fff;
}
#doneMessage {
    background-color: rgb(146, 255, 78);
}

#placeholder {
    display: inline-block;
}

#startAgainBtn {
    min-width: 130px;
    height: 40px;
    color: #fff;
    padding: 10px 20px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
    outline: none;
    border-radius: 5px;
    z-index: 0;
    background: #e77998;
    overflow: hidden;
    margin: 0 15px;
}

#startAgainBtn:hover {
    color: #fff;
}

#startAgainBtn:hover:after {
    width: 100%;
}

#startAgainBtn:after {
    content: "";
    position: absolute;
    z-index: -1;
    transition: all 0.3s ease;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: #d30315;
}

#loadedPicturesContainer {
    display: flex;
    flex-direction: column;
}

.loadedButton,
.convertedButton {
    background-color: #a3f1c4;
    color: #333;
    padding: 10px 20px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    margin-top: 10px;
    width: 100%;
    box-sizing: border-box;
    max-width: 50%;
    display: block;
    margin: 0 auto 5px;
}

.convertedButton {
    background-color: #3498db;
    color: #fff;
}

#donateContainer {
    margin-top: 20px;
}

a {
    text-decoration: none;
    font-weight: bold;
    background-color: #fccd66;
    color: #2b76c8;
    padding: 10px 20px;
    cursor: pointer;
    border-radius: 5px;
    margin-top: 10px;
}

footer {
    background-color: #333;
    color: #fff;
    padding: 15px 0 5px 0;
    text-align: center;
    margin-top: 40px;
    border-radius: 8px;
}

#socialMedia {
    display: flex;
    justify-content: center;
    margin-top: 30px;
}

#socialMedia a {
    color: #fff;
    text-decoration: none;
    margin: 0 5px;
    background-color: #3498db;
    padding: 10px 20px;
    border-radius: 5px;
}

#copyright {
    margin-top: 25px;
    color: rgb(101, 101, 101);
    font-size: 14px;
}

#copyright a {
    color: #fff;
    background-color: #333;
    text-decoration: none;
}

@media (max-width: 768px) {
    h1 {
        font-size: 22px;
    }

    label {
        padding: 8px 16px;
    }

    button {
        padding: 10px 16px;
        margin-bottom: 10px;
    }

    #startAgainBtn {
        min-width: 100px;
        padding: 8px 16px;
        margin-top: 10px;
    }

    .loadedButton {
        padding: 8px 16px;
    }

    #socialMedia a {
        color: #fff;
        text-decoration: none;
        margin: 10px;
        background-color: #3498db;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 18px;
    }

    label {
        padding: 8px 12px;
    }

    button {
        padding: 10px 12px;
    }

    #startAgainBtn {
        min-width: 80px;
        padding: 8px 12px;
    }

    .loadedButton,
    .convertedButton {
        padding: 8px 12px;
    }
}

@media (max-width: 350px) {
    #socialMedia {
        flex-direction: column;
        align-items: center;
    }
}
/* coded by Luc */