web.css

@import url('https://fonts.googleapis.com/css2?family=Source+Sans+Pro:wght@400;700&display=swap');
.material-symbols-outlined {
    font-variation-settings:
        'FILL' 100,
        'wght' 400,
        'GRAD' 0,
        'opsz' 48
}
body {
    background-color: #687078;
}
main {
    padding-top: 1em;
    margin: auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

button, a {
    display: flex;
    border: #000 solid 5px;
    flex-direction: column;
    font-size: 2em;
    margin: 5px;
    background-color: #ffc107;
    cursor: pointer;
    padding: 5px;
    border-radius: 1px;
    height: max-content; 
    color: black;
    text-decoration: none;  
    text-align: center;

}
a i {
    font-size: 2em !important;
}
button:hover, a:hover, button:focus, a:focus, a:active {
    color: #000;
    background-color: #ffca2c;
    border-color: #5b5b5b;
}
#swipe {
    margin-right: 10px;
    height: 5em;
    border: transparent solid 5px;
    padding-left: 5px;
    
}
#swipe:focus {
    outline: solid 3px #ffca2c4a; 
    border-color: #ffc107;
}
#attendees {
    outline: none;
    margin: 0px;
    height: 90vh;
    background-color: #474c52;
    border: none;
    width: 35%;
    text-align: center;
    padding-top: 10px;
}

body {
    margin: 0;
    overflow: hidden;
}
body, #attendees, header {
    font-family: 'Source Sans Pro';
    color: white
}
#warning {
    width: 35%;
    padding: 10px;
    display: flex;
    position: fixed;
    bottom: 0;
    right: 0;
    background-color: #5a5a5a;
    color: #ffc107;
    text-align: center;
    min-height: 100px;
    align-items: center;
    justify-content: center;
    font-size: 50px;
    border: #ffc107 solid 5px;
    transition: background-color .1s, border-color .1s;
    
}
header img {
    height: 1.75em;
    padding-right: .75em;
}
header span {
    font-size: 1.4em
}
header {
    width: 100vmax;
    padding: 15px;
    background-color: #26292c;
    font-size: 1.5em;
    display: flex;
}