essay.css

*, *::before, *::after {
    box-sizing: border-box;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

a {
    text-decoration: none;
    color: inherit;
}

svg {fill: inherit;}

body {
    margin: 0;
    background: #FAFBFC;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    padding-block: 80px 0px;
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', "system-ui", sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
    width: 100vw;
}

:root {
    --s-word: linear-gradient(to top, #1981C2, #62B7DC);
    --s-magic: linear-gradient(to top, #4682BD, #5ABEBA);
    --s-blue: #437EBD;

    --l-prim: black;
    --l-sec: rgb(37, 43, 46, 0.6);
    --l-tert: rgba(37, 43, 46, 0.05);
    
    --l-seperator: linear-gradient(to right, rgba(37, 43, 46, 0.07), rgba(37, 43, 46, 0.25), rgba(37, 43, 46, 0.07)) 1;

    --d-prim: white;
    --d-sec: rgb(231, 233, 234, 0.6);

    --picker: rgb(37, 43, 46, 0.05);
    --picker-2: rgb(231, 233, 234, 0.75);
}

nav {
    display: flex;
    padding: 4px;
    gap: 4px;
    border-radius: 15px;
    background-color: rgb(250, 251, 252, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    position: fixed;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

nav a {
    padding: 8px 16px;
    color: var(--l-sec);
    font-size: 17px;
    align-items: center;
    border-radius: 11px;
    transition: all 0.3s ease;
}

nav a:hover {
    background: rgb(0, 0, 0, 0.05);
    color: var(--l-prim);
}

.selected {
    color: var(--l-prim);
}

@media only screen and (max-width: 700px) {
    nav {
        border-radius: 0;
        width: 100vw;
        justify-content: space-around;
        position: fixed;
        top: 0px;
    }

    nav a svg {
        display: none;
    }

    .selected svg {
        display: initial;
    }
}






/* FONT */
h1, h2, h3, h4, p {
    margin: 0;
    margin-block-start: 0;
    margin-block-end: 0;
    height: fit-content;
    font-weight: 600;
    color: var(--l-prim);
}

sec {
    color: var(--l-sec);
}

p {
    font-weight: 400;
}

h1 {
    font-size: 80px;
    line-height: 84px;
    font-weight: 700;
}

h2 {
    font-size: 40px;
    line-height: 44px;
}

h3 {
    font-size: 32px;
    line-height: 36px;
}

h4 {
    font-size: 21px;
    line-height: 29px;
}

p {
    font-size: 19px;
    line-height: 27px;
    color: var(--l-sec);
}

@media (width <= 1068px) {
    h1 {
        font-size: 64px;
        line-height: 68px;
        font-weight: 600;
    }

    h2 {
        font-size: 32px;
        line-height: 36px;
    }

    h3 {
        font-size: 28px;
        line-height: 32px;
    }

}

@media (width <= 735px) {
    h1 {
        font-size: 48px;
        line-height: 52px;
    }

    h4 {
        font-size: 19px;
        line-height: 27px;
    }

}







/* STRUCTURE */

view, responsive {
    display: flex;
    flex-direction: column;
    position: relative;
    align-items: center;
    justify-content: center;
    width: 100%;
}

view {
    gap: 30px;
    overflow: hidden;
}

column, row {
    display: flex;
    flex-direction: column;
    width: 100%;
}

row {
    flex-direction: row;
}

.small {
    display: none;
}

@media (width <= 1068px) {
    responsive {
        max-width: 700px;
    }
}

@media (width <= 735px) {
    .small {
        display: initial;
    }

    responsive {
        max-width: 312px;
    }
}





/* HEADER ------------------------------------------------------------------------------------------------------------ */

.header {
    gap: 0px;
    max-width: 1730px;
}

.header column {
    gap: 10px;
    align-items: center;
    text-align: center;
    padding-inline: 30px;
}

.header column p {
    max-width: 460px;
}

.header row {
    justify-content: space-between;
    padding-inline: 70px;
}

.header row p {
    font-size: 17px;
    line-height: 25px;
}

photo-back {
    display: flex;
    width: 100vw;
    max-width: 1730px;
    height: 850px;
    position: relative;
    padding: 30px 60px;
}

.gradient {border-image: linear-gradient(180deg, #FAFBFC 0%, rgb(250, 251, 252, 0.7) 20%, rgba(250, 251, 252, 0.10) 40%, rgba(250, 251, 252, 0.10) 60%, rgba(250, 251, 252, 0.70) 80%, #FAFBFC 100%) fill 1;}

photo-frame {
    display: flex;
    align-items: center;
    z-index: 2;
    overflow: hidden;
    animation: immersivePhoto 1.5s ease-in-out none;
    position: relative;
    width: 100%;
    border-radius: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

photo-front {
    width: 100vw;
    max-width: 1730px;
    height: 850px;
    position: absolute;
    left: -60px;
    z-index: 2;
}

@keyframes immersivePhoto {
    0% {
        scale: 0.95;
    }
    25% {
        scale: 1.01;
    }
    50% {
        scale: 0.999;
    }
    75% {
        scale: 1.001;
    }
    100% {
        scale: 1;
    }
}

.PCS-52-E {background-image: url("Im/main/PCS-52-E.webp");}
.iOS-9 {background-image: url("Im/main/iOS-9.webp");}
.WWDC {background-image: url("Im/main/WWDC.webp");}
.v606-601 {background-image: url("Im/main/606-601.webp");}

.side-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    background: linear-gradient(90deg, #FAFBFC 0%, rgb(250, 251, 252, 0) 7%, rgba(250, 251, 252, 0) 93%, #FAFBFC 100%);
    display: none;
}

@media (width >= 1730px) {
    .side-gradient {
        display: initial;
    }
}

@media (width >= 1600px) {
    photo-back {
        height: 900px;
        padding: 30px 120px;
    }
    photo-front {
        height: 900px;
        left: -120px;
    }

    .header row {
        padding-inline: 130px;
    }

}

@media (width <= 1068px) {
    photo-back {
        height: 650px;
        padding: 30px 60px;
    }
    photo-front {
        height: 650px;
        left: -60px;
    }
}

@media (width <= 735px) {
    photo-back {
        height: 560px;
        padding: 30px 20px;
    }
    photo-front {
        height: 560px;
        left: -20px;
    }

    .header column {
        text-align: left;
        align-items: flex-start;
    }

    .header row {
        padding-inline: 30px;
        flex-direction: column;
    }
}








/* READ ------------------------------------------------------------------------------------------------------------ */
.p-grid, .prin-grid { padding: 0px 70px 60px; }
.subheading { padding: 0px 70px; }
.end { padding-bottom: 90px; }
.plat { padding-bottom: 90px; }

.p-grid {
    columns: 250px 4;
    column-gap: 30px;
    max-width: 1730px;
}

.p-grid p {
    margin-bottom: 1em;
    color: var(--l-prim);
    opacity: 0.85;
}

.subheading {
    gap: 15px;
    width: 100%;
    align-items: flex-start;
    max-width: 1730px;
}

line {
    height: 1px;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.12);
}

.prin-grid {
    display: grid;
    grid-template-columns: 
        repeat(auto-fit, minmax(250px, 1fr));
    gap: 60px;
    align-items: flex-start;
    row-gap: 30px;
    width: 100%;
    max-width: 1730px;
}

.end { padding-bottom: 90px; }

@media (width >= 1600px) {
    .p-grid, .prin-grid { padding: 0px 130px 30px; }
    .subheading { padding: 0px 130px; }
}

@media (width <= 735px) {
    .p-grid, .prin-grid { padding: 0px 30px 30px; }
    .subheading { padding: 0px 30px; }
    .p-grid {
        columns: 353px 4;
        column-gap: 30px;
    }
}








/* CHIN ------------------------------------------------------------------------------------------------------------ */
.chin {
    justify-content: flex-start;
    padding-block: 60px 120px;
    background: #F5F7F9;
}

.chin responsive {
    max-width: 980px;
    gap: 90px;
}

.link-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    width: 100%;
    column-gap: 30px;
    row-gap: 30px;
}

.sect {
    gap: 15px;
    width: 100%;
}

.sub-sect {
    gap: 10px;
}

.chin h1 {
    font-size: 48px;
    line-height: 52px;
    font-weight: 600;
}

.chin h2 {
    font-size: 17px;
    line-height: 22px;
    font-weight: 600;
}

.chin h3, .chin p {
    font-size: 12px;
    line-height: 16px;
    font-weight: 500;
    color: var(--l-sec);
}

.chin p {
    line-height: 20px;
    font-weight: 400;
}

@media (width <= 1068px) {
    .chin h1 {
        font-size: 40px;
        line-height: 44px;
    }

    .chin {
        padding-block: 60px 100px;
    }

    .chin responsive {
        max-width: 700px;
        gap: 60px;
    }
}


@media (width <= 735px) {
    .chin h1 {
        font-size: 32px;
        line-height: 36px;
    }

    .chin {
        padding-block: 60px 100px;
    }

    .chin responsive {
        max-width: 312px;
        gap: 60px;
    }
}