/* Landing page, plus the CSS coin it shares with the no-WebGL fallback. */

.hero {
    display: grid;
    align-content: center;
    gap: clamp(2rem, 5vh, 4rem);
    flex: 1;
    width: 100%;
    max-width: 96rem;
    margin: 0 auto;
    padding: clamp(1.5rem, 4vh, 4rem) var(--gutter) var(--space-7);
}

/* "Little" is set light and narrow, "Big" heavy and wide: the tagline drawn as type. */
.hero-title {
    display: grid;
    font-size: clamp(3.4rem, 10.5vw, 11rem);
    line-height: .88;
    letter-spacing: -.035em;
}

.hero-line {
    display: block;
    overflow: hidden;
    padding-bottom: .12em;
    margin-bottom: -.12em;
}

.hero-line > span {
    display: block;
}

.hero-line-little {
    font-size: .52em;
    font-weight: 300;
    font-stretch: 75%;
    letter-spacing: -.01em;
    color: var(--mist);
    margin-left: .08em;
    margin-bottom: .06em;
}

.hero-line-big {
    font-weight: 800;
    font-stretch: 100%;
}

.hero-sub {
    max-width: 44ch;
    margin-top: clamp(1rem, 2.5vh, 1.75rem);
    color: var(--mist);
    font-size: clamp(1.125rem, 1.7vw, 1.5rem);
    line-height: 1.35;
}

/* Until the entrance timeline takes over, keep its pieces out of sight (no flash of the final layout). */
.hero.will-animate .hero-line > span,
.hero.will-animate .hero-sub,
.hero.will-animate .game-card {
    visibility: hidden;
}

/* ---------- Game cards ---------- */

.game-list {
    display: grid;
    grid-template-columns: 1.08fr 1fr;
    gap: clamp(1rem, 2vw, 2rem);
    margin: 0;
    padding: 0;
    list-style: none;
}

.game-card {
    --mx: 50%;
    --my: 0%;
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: end;
    height: 100%;
    min-height: clamp(17rem, 34vh, 24rem);
    padding: clamp(1.25rem, 2.4vw, 2.25rem);
    overflow: hidden;
    border-radius: var(--radius-xl);
    background: linear-gradient(160deg, var(--slate-2), var(--slate) 55%, var(--ink-soft));
    box-shadow: inset 0 0 0 1px var(--line), inset 0 1px 0 rgb(255 255 255 / .07), 0 1.25rem 3rem rgb(0 0 0 / .35);
    color: inherit;
    text-decoration: none;
    transition: transform var(--dur-slow) var(--ease-out), box-shadow var(--dur-slow) var(--ease-out);
}

/* A soft light that follows the pointer across the card. */
.game-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(34rem circle at var(--mx) var(--my), rgb(251 191 36 / .13), transparent 60%);
    opacity: 0;
    transition: opacity var(--dur-slow) var(--ease-out);
    pointer-events: none;
}

.game-card:hover,
.game-card:focus-visible {
    transform: translateY(-.375rem);
    box-shadow: inset 0 0 0 1px rgb(251 191 36 / .35), inset 0 1px 0 rgb(255 255 255 / .1), 0 2rem 4rem rgb(0 0 0 / .5);
}

.game-card:hover::before,
.game-card:focus-visible::before {
    opacity: 1;
}

.game-card:focus-visible {
    border-radius: var(--radius-xl);
}

.game-card-copy {
    position: relative;
    z-index: 1;
    display: grid;
    justify-items: start;
    gap: var(--space-2);
}

.game-card-copy h2 {
    font-size: clamp(1.9rem, 3.2vw, 3rem);
    letter-spacing: -.02em;
}

.game-card-copy p {
    color: var(--mist);
    font-size: clamp(1rem, 1.25vw, 1.2rem);
}

.game-card-cta {
    margin-top: var(--space-4);
    white-space: nowrap;
    pointer-events: none;
}

.game-card:hover .game-card-cta {
    background: #FFCD45;
}

.game-card-art {
    position: relative;
    align-self: stretch;
    min-height: 11rem;
}

/* Coin Flip card: a large coin that hangs off the top corner. */
.art-coin {
    --coin-size: clamp(12rem, 21vw, 21rem);
    position: absolute;
    right: -9%;
    top: 50%;
    width: var(--coin-size);
    transform: translateY(-50%);
}

.art-coin::after {
    content: "";
    position: absolute;
    left: 10%;
    right: 10%;
    bottom: -18%;
    height: 14%;
    border-radius: 50%;
    background: radial-gradient(closest-side, rgb(0 0 0 / .55), transparent);
    animation: coin-shadow 6s ease-in-out infinite;
}

.art-coin .css-coin-spin {
    animation: coin-idle 6s ease-in-out infinite;
}

.game-card:hover .art-coin .css-coin-spin,
.game-card:focus-visible .art-coin .css-coin-spin {
    animation: coin-hover-flip 1.1s var(--ease-out) both;
}

@keyframes coin-idle {
    0%,
    100% {
        transform: translateY(0) rotateY(-24deg) rotateX(6deg);
    }

    50% {
        transform: translateY(-4%) rotateY(22deg) rotateX(-5deg);
    }
}

@keyframes coin-hover-flip {
    from {
        transform: rotateX(0) rotateY(-24deg);
    }

    to {
        transform: rotateX(360deg) rotateY(0deg);
    }
}

@keyframes coin-shadow {
    50% {
        transform: scale(.88);
        opacity: .7;
    }
}

/* Birthday Game card: calendar leaves drifting at different depths. */
.art-calendar {
    position: absolute;
    inset: -6% -8% 0 0;
}

.date-tile {
    --tilt: 0deg;
    --size: 5.2rem;
    position: absolute;
    display: grid;
    grid-template-rows: auto 1fr;
    width: var(--size);
    aspect-ratio: 1 / 1.08;
    overflow: hidden;
    border-radius: calc(var(--size) * .17);
    background: var(--slate-3);
    box-shadow: inset 0 0 0 1px var(--line-strong), 0 .75rem 1.5rem rgb(0 0 0 / .45);
    font-family: var(--font-display);
    text-align: center;
    transform: rotate(var(--tilt));
    animation: tile-drift var(--drift, 7s) ease-in-out infinite alternate;
    transition: translate var(--dur-slow) var(--ease-out), scale var(--dur-slow) var(--ease-out);
}

.date-tile b {
    padding: .22em 0 .16em;
    background: rgb(148 163 184 / .16);
    color: var(--mist);
    font-size: calc(var(--size) * .2);
    font-weight: 600;
    letter-spacing: .04em;
}

.date-tile i {
    align-self: center;
    font-size: calc(var(--size) * .5);
    font-style: normal;
    font-weight: 800;
    font-stretch: 85%;
    line-height: 1;
}

.date-tile.is-gold {
    background: var(--gold);
    color: var(--on-gold);
    box-shadow: inset 0 1px 0 rgb(255 255 255 / .6), 0 1rem 2.5rem rgb(251 191 36 / .28), 0 .75rem 1.5rem rgb(0 0 0 / .45);
    z-index: 2;
}

.date-tile.is-gold b {
    background: rgb(26 18 4 / .16);
    color: var(--on-gold);
}

.date-tile.is-far {
    opacity: .55;
}

.date-tile:nth-child(1) { --size: clamp(5.2rem, 8.6vw, 8.6rem); --tilt: -7deg; --drift: 7s; right: 26%; top: 22%; }
.date-tile:nth-child(2) { --size: clamp(3.6rem, 5.6vw, 5.6rem); --tilt: 9deg; --drift: 9s; right: 4%; top: 8%; }
.date-tile:nth-child(3) { --size: clamp(3.2rem, 4.8vw, 4.8rem); --tilt: -12deg; --drift: 8s; right: 62%; top: 4%; }
.date-tile:nth-child(4) { --size: clamp(3.8rem, 5.8vw, 5.8rem); --tilt: 6deg; --drift: 10s; right: 2%; top: 56%; }
.date-tile:nth-child(5) { --size: clamp(2.8rem, 4vw, 4rem); --tilt: 14deg; --drift: 11s; right: 68%; top: 50%; }

.game-card:hover .date-tile:nth-child(1) { scale: 1.08; translate: 0 -4%; }
.game-card:hover .date-tile.is-far { translate: 0 6%; }

@keyframes tile-drift {
    from {
        transform: translate3d(0, -4%, 0) rotate(var(--tilt));
    }

    to {
        transform: translate3d(0, 5%, 0) rotate(calc(var(--tilt) + 3deg));
    }
}

/* ---------- The CSS coin ---------- */

.css-coin {
    width: var(--coin-size, 12rem);
    aspect-ratio: 1;
    perspective: calc(var(--coin-size, 12rem) * 4);
}

.css-coin-spin {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.css-coin-side,
.css-coin-layer {
    position: absolute;
    inset: 0;
    border-radius: 50%;
}

.css-coin-side {
    backface-visibility: hidden;
    filter: drop-shadow(0 0 .5rem rgb(251 191 36 / .18));
}

.css-coin-side.is-heads {
    transform: translateZ(calc(var(--coin-size) * .035));
}

/* Turned about the horizontal axis, so it reads upright after an end-over-end flip. */
.css-coin-side.is-tails {
    transform: rotateX(180deg) translateZ(calc(var(--coin-size) * .035));
}

.css-coin-layer {
    /* Fine alternating wedges all the way round: the reeded edge, seen whenever the coin turns. */
    background:
        linear-gradient(90deg, rgb(60 36 4 / .55), transparent 30%, rgb(255 244 200 / .35) 50%, transparent 70%, rgb(60 36 4 / .6)),
        repeating-conic-gradient(#8A5A0C 0deg 1.25deg, #F2C348 1.25deg 2.5deg);
    transform: translateZ(calc(var(--coin-size) * (var(--z) - 3.5) * .009));
}

.coin-face-svg {
    display: block;
    width: 100%;
    height: 100%;
}

.coin-legend {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .2em;
}

.coin-mono {
    font-family: var(--font-display);
    font-size: 84px;
    font-weight: 800;
    font-stretch: 80%;
    letter-spacing: -.04em;
}

/* ---------- Narrow screens ---------- */

@media (max-width: 860px) {
    .game-list {
        grid-template-columns: 1fr;
    }

    .game-card {
        min-height: 15.5rem;
    }
}

@media (max-width: 520px) {
    .hero {
        align-content: start;
    }

    .hero-sub {
        font-size: 1.0625rem;
    }

    .game-card {
        grid-template-columns: minmax(0, 1fr);
        min-height: 16.5rem;
    }

    .game-card-art {
        position: absolute;
        inset: 0;
        min-height: 0;
    }

    .game-card-copy p {
        max-width: 17ch;
    }

    /* The art moves up into the corner so it never sits behind the words. */
    .art-coin {
        --coin-size: 11rem;
        right: -3.25rem;
        top: 34%;
    }

    .art-calendar {
        inset: 0 -1rem 42% 38%;
    }

    .date-tile:nth-child(1) { --size: 4.6rem; right: 24%; top: 10%; }
    .date-tile:nth-child(2) { --size: 3.3rem; right: 0%; top: 34%; }
    .date-tile:nth-child(3) { --size: 2.9rem; right: 70%; top: 10%; }
    .date-tile:nth-child(4) { --size: 3.2rem; right: 2%; top: 78%; }
    .date-tile:nth-child(5) { display: none; }

    .game-card-cta {
        min-height: 3.25rem;
        padding: 0 1.25rem;
        font-size: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .art-coin .css-coin-spin,
    .game-card:hover .art-coin .css-coin-spin,
    .date-tile,
    .art-coin::after {
        animation: none;
    }

    .art-coin .css-coin-spin {
        transform: rotateY(-18deg) rotateX(5deg);
    }
}