:root {
    --background: #f3f4ee;
    --text: #63635f;
}

* {
    margin: 0;
    box-sizing: border-box;
}

html {
    width: 100%;
    height: 100%;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    line-height: 1.25;
    -webkit-text-size-adjust: 100%; /* Prevents Safari from auto-resizing text. */
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--background);
    color: var(--text);
}

a {
    color: var(--text);
    text-decoration-style: dotted;
}

h1,
h2,
h3 {
    font-weight: normal;
    text-transform: uppercase;
    font-size: 0.8em;
}

header {
    text-align: center;
    padding: 5rem 1rem;
}

main {
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 1rem;
}

#home {
    max-width: 800px;
    display: flex;
    flex-wrap: wrap;
}

#home .roof {
    width: 100%;
    height: 100px;
    background-image: radial-gradient(var(--text) 50%, transparent 50%);
    background-size: 3px 3px;
    clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0% 100%);
}

#home .floor {
    display: flex;
    width: 100%;
}

#home .floor iframe {
    width: 100px;
    flex: 1 1 auto;
    /* border: 0; */
    height: calc(min(100vw, 800px) / 4);
    border: 1px var(--background) inset;
}

#home .floor .stairs {
    flex-grow: 0;
    flex-basis: min(70px, 20%);
    background-image: 
        repeating-linear-gradient(transparent, transparent 13px, var(--text) 13px, var(--text) 15px),
        linear-gradient(to right, transparent, transparent 90%, var(--text) 90%, var(--text) 100%);
    background-repeat: no-repeat;
    background-size: 80% 100%;
    background-position: bottom left;

}

#home .floor:nth-child(even) {
    flex-direction: row-reverse;
}

#home .floor:nth-child(even) .stairs {
    transform: scaleX(-1);
}

footer {
    text-align: center;
    padding: 1rem;
    max-width: 400px;
    margin: 0 auto;
}

footer #participants {
    padding: 5rem 1rem;
}

footer #participants ul {
    list-style: none;
    margin: 0;
    padding: 0;
}