Manuel/style.css

:root {
    --color-scheme : light;
    --ecriture: black;
    --background: white;
    --police: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

html {
    /* color-scheme: dark !important; */
    color-scheme: var(--color-scheme);
    background: var(--background);
    color: var(--ecriture);
    font-size: 1.5rem;
    font-family: var(--police);
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    background-color: var(--background);
}

#iframe {
    display: flex;
    margin: 5px;
    background-color: transparent;
}

#img {
    display: flex;
    margin: 5px;
    background-color: transparent;
}

img {
    width: 100%;
}

iframe {
    width: 553px;
    height: 794px;
}

label {
    display: block;
    margin: 10px;
}

input[type="text"] {
    padding: 5px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
    line-height: 1.5;
    width: 300px;
    border-color: var(--background);
}

input[type="radio"] {
    margin-top: 10px;
    margin-right: 20px;
    margin-bottom: 10px;
    margin-left: 5px;
}

button {
    /* padding: 5px; */
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 10px;
    width: 200px;
    height: 40px;
}

button:hover {
    background-color: #3e8e41;
}

iframe {
    display: block;
    margin-bottom: 20px;
}

button:last-child {
    margin-right: 10px;
}

h1 {
    font-size: 15px;
}

a {
    color: #3391ff;
}