/* Progressive scroll enhancements for the home page. */
:root {
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
    overflow-x: clip;
}

body {
    position: relative;
    overflow-x: clip;
}

main,
#footer-placeholder {
    position: relative;
    z-index: 1;
}

#header-placeholder {
    position: relative;
    z-index: 40;
}

section,
footer {
    scroll-margin-top: 6rem;
}

.polyhedron-stage {
    --polyhedron-eye: 50vh;
    perspective: 1400px;
    perspective-origin: 50% var(--polyhedron-eye);
    transform-style: preserve-3d;
}

.polyhedron-face {
    --face-depth: 0px;
    --face-rotation: 0deg;
    --face-origin: center;
    position: relative;
    isolation: isolate;
    margin-block: 1.25rem;
    padding-inline: clamp(1.25rem, 4vw, 3.5rem);
    border: 1px solid rgb(51 65 85 / 0.7);
    border-radius: 1.25rem;
    background:
        linear-gradient(
            145deg,
            rgb(30 41 59 / 0.66),
            rgb(15 23 42 / 0.34) 58%,
            rgb(6 78 59 / 0.1)
        ),
        rgb(15 23 42 / 0.32);
    box-shadow:
        0 24px 70px rgb(2 6 23 / 0.22),
        inset 0 1px 0 rgb(255 255 255 / 0.025);
    backface-visibility: hidden;
    transform: translate3d(0, 0, var(--face-depth))
        rotateX(var(--face-rotation));
    transform-origin: 50% var(--face-origin);
    transform-style: preserve-3d;
}

.polyhedron-face::before {
    content: '';
    position: absolute;
    z-index: -1;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(
        115deg,
        rgb(52 211 153 / 0.18),
        transparent 35%,
        rgb(94 234 212 / 0.1)
    );
    opacity: var(--face-sheen, 0);
}

.polyhedron-face::after {
    content: '';
    position: absolute;
    z-index: -2;
    right: 1.25rem;
    bottom: -10px;
    left: 1.25rem;
    height: 10px;
    border-radius: 0 0 0.75rem 0.75rem;
    background: linear-gradient(
        180deg,
        rgb(16 185 129 / 0.22),
        rgb(2 6 23 / 0.68)
    );
    transform: rotateX(-78deg);
    transform-origin: top;
}

.polyhedron-face.is-transforming {
    will-change: transform;
}

.scroll-ambient {
    position: fixed;
    z-index: 0;
    inset: -20vh -15vw;
    pointer-events: none;
    background:
        radial-gradient(
            circle at 16% 18%,
            rgb(16 185 129 / 0.1),
            transparent 24rem
        ),
        radial-gradient(
            circle at 88% 70%,
            rgb(20 184 166 / 0.07),
            transparent 28rem
        );
    transform: translate3d(0, var(--ambient-shift, -20px), 0);
    will-change: transform;
}

.scroll-data-field {
    position: fixed;
    z-index: 0;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    opacity: 0;
    contain: strict;
    mask-image: linear-gradient(
        to bottom,
        transparent 2%,
        black 18%,
        black 88%,
        transparent 100%
    );
    transition: opacity 180ms linear;
    will-change: opacity;
}

.scroll-data-field svg {
    display: block;
    width: 100%;
    height: 100%;
}

.data-signal,
.data-network path {
    fill: none;
    vector-effect: non-scaling-stroke;
}

.data-signal {
    stroke-linecap: round;
    stroke-linejoin: round;
    will-change: stroke-dashoffset;
}

.data-signal--primary {
    stroke: rgb(52 211 153 / 0.72);
    stroke-width: 1.2;
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
}

.data-signal--ghost {
    stroke: rgb(94 234 212 / 0.34);
    stroke-width: 0.85;
    stroke-dasharray: 0.018 0.012;
    stroke-dashoffset: 0;
}

.data-network {
    transform-box: fill-box;
    transform-origin: center;
    will-change: transform;
}

.data-network path {
    stroke: rgb(52 211 153 / 0.34);
    stroke-width: 0.85;
}

.data-network circle {
    fill: rgb(94 234 212 / 0.62);
    stroke: rgb(15 23 42 / 0.72);
    stroke-width: 1;
    vector-effect: non-scaling-stroke;
}

.scroll-progress {
    position: fixed;
    z-index: 50;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    pointer-events: none;
    background: linear-gradient(90deg, #10b981, #5eead4);
    box-shadow: 0 0 14px rgb(52 211 153 / 0.65);
    transform: scaleX(0);
    transform-origin: left center;
    will-change: transform;
}

.motion-enhanced .scroll-reveal {
    --reveal-x: 0px;
    --reveal-y: 28px;
    --reveal-scale: 0.985;
    opacity: 0;
    filter: blur(8px);
    transform: translate3d(
            var(--reveal-x),
            calc(var(--reveal-y) + var(--parallax-y, 0px)),
            0
        )
        scale(var(--reveal-scale));
    transition:
        opacity 700ms var(--ease-out-expo),
        transform 900ms var(--ease-out-expo),
        filter 700ms var(--ease-out-expo),
        border-color 300ms ease,
        box-shadow 400ms ease;
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform, filter;
}

.motion-enhanced .scroll-reveal[data-reveal='left'] {
    --reveal-x: -26px;
    --reveal-y: 0px;
}

.motion-enhanced .scroll-reveal.is-visible {
    --reveal-x: 0px;
    --reveal-y: 0px;
    --reveal-scale: 1;
    opacity: 1;
    filter: blur(0);
    will-change: auto;
}

.scroll-portrait {
    position: relative;
    isolation: isolate;
}

.scroll-portrait::before {
    content: '';
    position: absolute;
    z-index: -1;
    inset: -12px;
    border: 1px solid rgb(52 211 153 / 0.22);
    border-radius: 9999px;
    background: rgb(16 185 129 / 0.06);
    box-shadow: 0 0 42px rgb(16 185 129 / 0.12);
    opacity: 0;
    transform: scale(0.9);
    transition:
        opacity 800ms var(--ease-out-expo) 180ms,
        transform 1000ms var(--ease-out-expo) 180ms;
}

.scroll-portrait.is-visible::before {
    opacity: 1;
    transform: scale(1);
}

.scroll-section-title {
    position: relative;
    width: fit-content;
    margin-inline: auto;
}

.scroll-section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -0.8rem;
    width: 2.75rem;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, #10b981, #5eead4);
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    transition: transform 850ms var(--ease-out-expo) 180ms;
}

.scroll-section-title.is-visible::after {
    transform: translateX(-50%) scaleX(1);
}

.polished-card.is-visible {
    box-shadow: 0 16px 42px rgb(2 6 23 / 0.14);
}

@media (hover: hover) and (pointer: fine) {
    .motion-enhanced .polished-card.is-visible:hover {
        transform: translate3d(0, -4px, 0);
        box-shadow:
            0 22px 52px rgb(2 6 23 / 0.28),
            0 0 0 1px rgb(16 185 129 / 0.08);
    }
}

.nav-link {
    background-image: linear-gradient(#34d399, #34d399);
    background-position: 0 100%;
    background-repeat: no-repeat;
    background-size: 0 1px;
    transition:
        color 250ms ease,
        background-size 400ms var(--ease-out-expo);
}

.nav-link.is-active {
    color: #6ee7b7;
    background-size: 100% 1px;
}

@media (max-width: 767px) {
    .polyhedron-stage {
        perspective: 950px;
    }

    .polyhedron-face {
        margin-block: 0.875rem;
        padding-inline: 1.25rem;
        border-radius: 1rem;
    }

    .motion-enhanced .scroll-reveal {
        --reveal-y: 18px;
        filter: blur(5px);
    }

    .scroll-ambient {
        inset: -10vh -40vw;
        opacity: 0.8;
    }

    .scroll-data-field {
        mask-image: linear-gradient(
            to bottom,
            transparent,
            black 24%,
            black 90%,
            transparent
        );
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto !important;
    }

    .scroll-progress,
    .scroll-ambient,
    .scroll-data-field {
        display: none;
    }

    .polyhedron-face,
    .scroll-reveal,
    .scroll-reveal::before,
    .scroll-reveal::after,
    .nav-link {
        opacity: 1 !important;
        filter: none !important;
        transform: none !important;
        transition: none !important;
    }
}