:root {
    --bg: #0d0d0d;
    --fg: #f8f8f8;
    --muted: #8e8e8e;
    --soft: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
}

body {
    overflow: hidden;
    background: var(--bg);
    color: var(--fg);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::before {
    position: fixed;
    inset: 0;
    pointer-events: none;
    content: "";
    background:
        radial-gradient(circle at var(--glow-x, 50%) var(--glow-y, 48%), rgba(255, 255, 255, 0.055), transparent 24rem),
        linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent 38%);
    opacity: var(--glow-a, 0.8);
    transition: opacity 420ms ease;
}

#field {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
}

.identity {
    position: fixed;
    inset: 0;
    z-index: 1;
    display: grid;
    place-content: center;
    justify-items: center;
    padding: 2rem;
    pointer-events: none;
}

.logo {
    display: flex;
    gap: clamp(0.38rem, 1.15vw, 0.88rem);
    align-items: center;
    margin: 0;
    color: var(--fg);
    font-size: clamp(3.1rem, 9vw, 7.2rem);
    font-weight: 760;
    line-height: 0.9;
    letter-spacing: 0;
    text-transform: uppercase;
    user-select: none;
}

.logo span {
    position: relative;
    display: grid;
    grid-template-columns: repeat(5, var(--pixel-size));
    grid-template-rows: repeat(7, var(--pixel-size));
    gap: var(--pixel-gap);
    min-width: 0;
    color: transparent;
    font-size: 0;
    line-height: 1;
    text-align: center;
    transform:
        translate3d(var(--letter-x, 0), var(--letter-y, 0), 0)
        rotate(var(--letter-r, 0deg))
        scale(var(--letter-s, 1));
    transition:
        transform 540ms cubic-bezier(0.16, 1, 0.3, 1),
        opacity 420ms ease,
        text-shadow 420ms ease;
    will-change: transform;
}

.logo span::after {
    position: absolute;
    inset: -18%;
    z-index: -1;
    pointer-events: none;
    content: "";
    opacity: var(--letter-g, 0);
    background: radial-gradient(circle, rgba(255, 255, 255, 0.16), transparent 64%);
    filter: blur(12px);
}

.pixel {
    width: var(--pixel-size);
    height: var(--pixel-size);
    border-radius: 1.5px;
    background: rgb(
        calc(238 + var(--heat, 0) * 17)
        calc(238 - var(--heat, 0) * 64)
        calc(238 + var(--heat, 0) * 6)
    );
    box-shadow:
        0 0 calc(3px + var(--heat, 0) * 18px) rgba(255, 255, 255, calc(0.06 + var(--heat, 0) * 0.2)),
        0 0 calc(var(--spark, 0) * 22px) hsl(var(--spark-h, 188) 100% 68% / calc(var(--spark, 0) * 0.62));
    opacity: calc(0.9 + var(--heat, 0) * 0.1);
    transform:
        translate3d(var(--px-x, 0), var(--px-y, 0), 0)
        scale(calc(1 + var(--heat, 0) * 0.22));
    transition:
        background-color 260ms ease,
        box-shadow 260ms ease,
        opacity 260ms ease,
        transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform;
}

.logo span.is-touched {
    transition-duration: 150ms;
}

.mail {
    margin-top: clamp(1.65rem, 4.5vw, 3rem);
    color: var(--muted);
    font-size: clamp(0.76rem, 1.8vw, 0.9rem);
    line-height: 1.4;
    letter-spacing: 0.18em;
    text-decoration: none;
    pointer-events: auto;
    transition: color 220ms ease, opacity 220ms ease;
}

.mail:hover,
.mail:focus-visible {
    color: var(--fg);
    outline: 0;
}

@media (max-width: 520px) {
    .identity {
        padding: 1.25rem;
    }

    .logo {
        gap: 0.32rem;
        font-size: clamp(2.4rem, 15vw, 4.2rem);
    }

    .mail {
        letter-spacing: 0.12em;
    }
}

@media (min-width: 1px) {
    .logo {
        --pixel-size: clamp(0.36rem, 1.08vw, 0.88rem);
        --pixel-gap: clamp(0.1rem, 0.27vw, 0.22rem);
    }
}

@media (prefers-reduced-motion: reduce) {
    .logo span {
        transition-duration: 1ms;
    }
}