@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;600&display=swap');

*,
*::after,
*::before {
    box-sizing: border-box;
}

:root {
    font-size: 16px;
    --color-text: #fff;
    --color-bg: #000;
    --color-link: #fff;
    --color-link-hover: #fff;
}

body {
    margin: 0;
    color: var(--color-text);
    background-color: var(--color-bg);
    font-family: 'Oswald', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    height: 100%;
    overflow: hidden;
}

a {
    text-decoration: none;
    color: var(--color-link);
    outline: none;
    cursor: pointer;
}

a:hover {
    color: var(--color-link-hover);
    outline: none;
}

.frame {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    color: var(--color-title);
    padding: 2rem;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto auto auto 1fr;
    grid-template-areas: 'title title' 'prev back' 'demos demos' 'blank blank' 'nav nav';
    justify-content: start;
    align-content: start;
    align-items: start;
    z-index: 100;
    pointer-events: none;
    grid-gap: 1rem;
}

body #cdawrap {
    align-self: start;
    justify-self: start;
}

.frame a,
.frame button {
    pointer-events: auto;
}

.frame__title {
    grid-area: title;
    display: flex;
    align-items: flex-end;
    font-weight: 400;
}

.frame strong {
    font-weight: 700;
}

.frame__title-main {
    font-size: inherit;
    margin: 0;
    font-weight: inherit;
}

.frame__back {
    grid-area: back;
}

.frame__prev {
    grid-area: prev;
}

.frame__demos {
    grid-area: demos;
    display: grid;
    grid-template-columns: repeat(8,auto);
    column-gap: 1rem;
    row-gap: 0.5rem;
    background-color: rgba(0,0,0, 75%);
    padding: 20px;
    border-radius: 10px;
}

.frame__demos span {
    grid-column: 1 / span 8;
}

a.frame__demo {
    font-weight: 400;
    font-size: 1rem;
    text-decoration: none;
    opacity: 0.5;
    font-family: 'Oswald', sans-serif;
}

a.frame__demo--current {
    font-weight: 700;
    opacity: 1;
    color: var(--color-link-hover);
}

.slides {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: grid;
    grid-template-rows: 100%;
    grid-template-columns: 100%;
    place-items: center;
}

.slide {
    width: 100%;
    height: 100%;
    grid-area: 1 / 1 / -1 / -1;
    pointer-events: none;
    opacity: 0;
    overflow: hidden;
    position: relative;
    display: grid;
    place-items: center;
    will-change: transform, opacity;
}

.slide--current {
    pointer-events: auto;
    opacity: 1;
}

.deco {
    width: 100%;
    height: 100%;
    grid-area: 1 / 1 / -1 / -1;
    pointer-events: none;
    position: relative;
    opacity: 0;
    background: #03324E;
    will-change: transform, opacity;
}

.deco--1 {
    background: #72BAD5;
}

.deco--2 {
    background: #0E4C6D;
}

.deco--3 {
    background: #03324E;
}

.deco--4 {
    background: #01263D;
}

.deco--5 {
    background: #03324E;
}

.deco--6 {
    background: #0E4C6D;
}

.deco--7 {
    background: #03324E;
}

.slide__img {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: 50% 50%;
    background-repeat: no-repeat;
    will-change: transform, opacity, filter;
}

.demo-2 .slide__img {
    width: 120%;
    height: 120%;
}

.slides-nav {
    grid-area: nav;
    display: flex;
    gap: 0.5rem;
    align-self: end;
    align-items: center;
}

.slides-nav::before {
    content: 'scroll / drag';
    margin-right: 2rem;
}

.slides-nav__item {
    border: 0;
    background: #fff;
    color: #000;
    width: 60px;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.3s;
}

.slides-nav__item:hover {
    background-color: #ccc;
}


@media screen and (min-width: 53em) {
    .frame {
        height: 100vh;
        grid-gap: 2rem;
        align-content: space-between;
        grid-template-columns: auto auto auto 1fr;
        grid-template-rows: auto auto;
        grid-template-areas: 'title back prev demos' 'blank ... ... nav ';
    }
    .frame__demos {
        justify-self: end;
        justify-content: end;
    }
    .frame__demos span,
    a.frame__demo {
        text-align: right;
    }
    .slides-nav {
        justify-self: end;
    }
    body #cdawrap {
        align-self: center;
        justify-self: start;
    }
}