new-bigly-chat/docs/css/main.css

:root {
    --black: rgb(16, 16, 16);
    --gray: rgb(38, 38, 38);
    --white: rgb(240, 240, 240);
    --primary-dark: rgb(230, 78, 78);
    --primary-light: rgb(255, 200, 200);
    --elem-width: min(800px, 90vw);
    --elem-height: 300px;
    --border-radius: 15px;
    --font: system-ui, sans-serif;
    color: var(--white);
    background: var(--black);
    font-family: var(--font) !important;
}

.banner,
body {
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
    margin-top: 0
}

.banner {
    justify-content: center;
    margin-bottom: calc(-1*var(--elem-height))
}

.banner-background,
.banner-content {
    height: var(--elem-height);
    overflow-y: auto
}

.banner-background {
    border-radius: var(--border-radius);
    background-color: var(--gray);
    opacity: 30%;
    object-fit: cover
}

.banner-content {
    margin-left: 10px;
    margin-right: 10px;
    position: relative;
    top: calc(-1*var(--elem-height))
}

.banner,
.banner-background,
.content {
    width: var(--elem-width)
}

.avatar {
    display: flex;
    justify-content: space-between;
    width: var(--elem-width);
    align-items: center;
}

.avatar-img {
    width: 50px;
    height: 50px;
    margin-right: 15px
}

.form {
    width: calc(var(--elem-width) - 1rem);
    grid-template-columns: .51fr 1fr;
    display: grid
}

.form-key {
    margin-right: 10px
}

.form-button,
.form-input,
.form {
    border: solid var(--gray) 3px;
    background: var(--black);
    border-radius: var(--border-radius);
    color: var(--white);
    padding: .5rem;
    margin-bottom: .5rem;
    text-decoration: none
}

.form-button,
.form-heading,
.form-message {
    grid-column: span 2;
}

.form-button {
    font-weight: 700;
    display: inline-block;
    background: var(--primary-dark);
    border-color: var(--primary-light)
}

.header {
    z-index: 5;
    position: sticky;
    top: 0;
    display: flex;
    background: var(--gray);
    color: var(--white);
    padding: 10px;
    margin-bottom: 10px;
    align-items: center;
    width: calc(100vw - 20px)
}

.header-link,
.link {
    font-weight: 700;
    color: var(--white)
}

.header-link {
    text-decoration: none;
    padding-left: .5em;
    margin-left: .5em;
    border-left: solid var(--white) 2px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 1.5em;
}

.header-img {
    border-left: none;
    margin-left: 0;
    padding-left: 0;
    height: 1.5em;
    width: 1.5em;
    object-fit: cover;
}

@media (max-width: 800px) {
    .form {
        grid-template-columns: 1fr;
    }
    .form-button, .form-heading, .form-message {
        grid-column: span 1;
    }
}