:root {
    --max-width: 1100px;
    --page-bleed: 10rem;
    --rail-edge-fade: 4rem;
    --text: #111111;
    --orange: #E89C73;
    --dark-blue: #23617E;
    --yellow: #F4D892;
    --red: #E36559;
    --pale-blue: #94BEBB;
    --white: #FFFFF2;
    --off-white: #F6E7CB;
    --green: #657652;
    --lilac: #7D5BA6;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Instrument Sans', system-ui, sans-serif;
    color: var(--text);
    background: var(--off-white);
}

a {
    color: inherit;
}

.page {
        /*
            The page width is capped by --max-width but can be extended
            by adjusting --page-bleed (e.g. 200px) to make the rail reach
            further toward the viewport edges.
        */
        width: min(100% - 2rem, calc(var(--max-width) + var(--page-bleed)));
        margin: 0 auto;
        padding: 1rem 0 2rem;
}
.header {
    margin-bottom: 1rem;
}

.header h1,
.card h2,
.header p {
    margin: 0;
}

.header h1 {
    font-family: 'Young Serif', serif;
    font-size: 2.5rem;
    letter-spacing: 0.05rem;
}

.header p {
    font-family: 'Instrument Sans', sans-serif;
    font-size: 1.25rem;
    /* font-weight: 400; */
}

.header p,
.card p {
    color: var(--green);
}

.card h2,
.card p {
    font-family: 'Instrument Sans', sans-serif;
    letter-spacing: 0.02em;
    margin: 0rem 0.5rem 0.5rem 0.5rem;
}

.rail-section {
    display: grid;
    gap: 1rem;
}

.rail-controls {
    display: flex;
    gap: 0.5rem;
}

button {
    font: inherit;
}

.rail-controls button {
    padding: 0.5rem 0.8rem;
    border: 1px solid var(--highlight);
    background: #f8f8f8;
    border-radius: 0.5rem;
}

.rail-controls button:disabled {
    opacity: 0.4;
}

.rail {
    display: grid;
    gap: 2rem;
    padding-bottom: 5rem;
    padding-top: 5rem;
}

.card {
    display: flex;
    flex-direction: column;
    min-height: 21rem;
    border: 3px solid var(--highlight);
    border-radius: 3rem 3rem 1.5rem 1.5rem;
    padding: 1rem;
    background: #fff;
    box-shadow: 0.5rem 0.5rem 1rem rgba(0, 0, 0, 0.2);
    transition: transform 180ms ease, box-shadow 180ms ease, opacity 300ms ease;
    will-change: transform;
    transition: all 300ms ease;
}

.card.inactive .card-button,
.card.inactive button {
    pointer-events: none;
}

.card-button-list {
    list-style: none;
    padding: 0;
    margin: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.tech-stack-list {
    list-style: none;
    padding: 0;
    margin: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transform: translateY(-0.4rem);
    transition: max-height 250ms ease, opacity 250ms ease, transform 250ms ease;
}

.card.show-tech .tech-stack-list {
    max-height: 8rem;
    opacity: 1;
    transform: translateY(0);
    overflow: visible;
}

.card-button {
    text-decoration: none;
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--highlight);
    background: var(--pale-blue);
    border-radius: 0.5rem;
    font-size: 0.8rem;
    transition: opacity 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

.card-button.with-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.card-button-icon {
    width: 0.85rem;
    height: 0.85rem;
    fill: currentColor;
    flex-shrink: 0;
}

.card-button:hover {
    opacity: 0.8;
    cursor: pointer;
    transform: translate(-1px, -2px);
    box-shadow: 0.5px 0.5px 1px rgba(0, 0, 0, 0.1);
}

.tag {
    background: var(--off-white);
    border: 1px solid var(--highlight);
    cursor: default;
}

.card-button[data-card="javascript"] {
    background: var(--orange);
    color: var(--white);
    border-color: var(--orange);
}

.card-button[data-card="HTML"] {
    background: var(--green);
    color: var(--white);
    border-color: var(--green);
}

.card-button[data-card="jQuery"] {
    background: var(--red);
    color: var(--white);
    border-color: var(--red);
}

.card-button[data-card="p5js"] {
    background: var(--white);
    color: var(--red);
    border: 1px solid;
    border-color: var(--red);
}

.card-button[data-card="learn"] {
    background: var(--yellow);
    color: var(--text);
    border-color: var(--yellow);
}

.card-button[data-card="api"] {
    background: var(--dark-blue);
    color: var(--white);
    border-color: var(--dark-blue);
}

.card-button[data-card="photoshop"] {
    background: var(--dark-blue);
    color: var(--white);
    border-color: var(--dark-blue);
}

.card-button[data-card="illustrator"] {
    background: var(--yellow);
    color: var(--text);
    border-color: var(--yellow);
}

.more-info {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-0.5rem);
    margin: 0 0.5rem;
    transition: max-height 300ms ease, opacity 250ms ease, transform 250ms ease, margin-top 250ms ease;
}

.card.expanded .more-info {
    max-height: 20rem;
    opacity: 1;
    transform: translateY(0);
    margin-top: 0.75rem;
}

.more-info p {
    margin: 0;
}

@media (hover: hover) and (pointer: fine) {
    .card:hover,
    .card:focus-within {
        transform: translateY(-8px);
        box-shadow: 0 14px 28px rgba(0, 0, 0, 0.16);
        cursor: pointer;
    }

    .card:not(.inactive):hover,
    .card:not(.inactive):focus-within {
        transform: none;
        box-shadow: 0.5rem 0.5rem 1rem rgba(0, 0, 0, 0.2);
        cursor: default;
    }
}

.card-image {
    width: 100%;
    height: 10rem;
    object-fit: cover;
    border-radius: 2rem 2rem 1rem 1rem;
    margin-bottom: 1rem;
}

.card h2 {
    margin-bottom: 0.5rem;
}

.card a {
    text-decoration: underline;
}

@media (min-width: 900px) {
    .rail {
        display: flex;
        align-items: flex-start;
        gap: 2rem;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        padding-bottom: 5rem;
        padding-left: var(--page-bleed);
        padding-right: 10rem; 
        -webkit-mask-image: linear-gradient(
            to right,
            transparent 0,
            #000 var(--rail-edge-fade),
            #000 calc(100% - var(--rail-edge-fade)),
            transparent 100%
        );
        mask-image: linear-gradient(
            to right,
            transparent 0,
            #000 var(--rail-edge-fade),
            #000 calc(100% - var(--rail-edge-fade)),
            transparent 100%
        );
        -webkit-mask-size: 100% 100%;
        mask-size: 100% 100%;
        -webkit-mask-repeat: no-repeat;
        mask-repeat: no-repeat;
    }

    .card {
        flex: 0 0 min(32rem, 80vw);
        scroll-snap-align: start;
        min-height: 21rem;
    }

    .card.spacer {
        opacity: 0;
        cursor: default;
        pointer-events: none;
    }
    
}

@media (max-width: 899px) {
    .rail-controls {
        display: none;
    }
}

@media (min-width:900px){
  .rail {
    padding-left: 4rem;
    margin-left: -4rem;            
    scroll-padding-inline-start: 4rem;
    scroll-padding-left: 4rem;
  }

  .card { scroll-snap-align: start; }
}