/* hero */
.hero {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin: 0 0 8px;
    color: var(--text-primary);
}

.hero-sub {
    font-size: 1.1rem;
    color: var(--text-primary);
    opacity: 0.9;
    margin: 0 0 10px;
    max-width: 520px;
    line-height: 1.55;
}

/* hero split */
.hero-split {
    display: flex;
    flex-direction: row;
    gap: 32px;
    align-items: center;
}

.hero-left {
    flex: 0 0 340px;
}

.hero-right {
    flex: 1;
    min-width: 0;
    display: flex;
    justify-content: center;
}

.hero-viewport {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1200px;
    position: relative;
    min-height: 480px;
}

@keyframes spin-slow {
    from {
        transform: rotateX(52deg) rotateZ(-40deg) scale(1.3);
    }
    to {
        transform: rotateX(52deg) rotateZ(320deg) scale(1.3);
    }
}

/* laptop */
.bp-scene {
    position: relative;
    width: 0;
    height: 0;
    transform-style: preserve-3d;
    transform: rotateX(52deg) rotateZ(-40deg) scale(1.3);
    transition: transform 0.8s var(--ease-out);
    margin-top: 30px;
}

body:has(#rotate-trigger:checked) .bp-scene {
    animation: spin-slow 12s linear infinite;
}

/* ─── BASE LAYER ─── */
.bp-layer {
    position: absolute;
    left: 50%;
    top: 50%;
    transform-style: preserve-3d;
    margin-left: -180px;
    margin-top: -180px;
    width: 360px;
    height: 360px;
    transition:
        transform 0.8s var(--ease-out),
        opacity 0.5s;
}

.bp-layer svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* ─── SCREEN ASSEMBLY (hinged, tilts open on explode) ─── */
.screen-group {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 360px;
    height: 360px;
    margin-left: -180px;
    margin-top: -180px;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.34, 1.2, 0.64, 1);
    transform-origin: 50% 0% 0px;
    transform: rotateX(40deg);
}

body:has(#explode-trigger:checked) .screen-group {
    transform: rotateX(90deg);
}

/* ─── LAYER POSITIONS (assembled) ─── */
.layer-bottom-case {
    transform: translate3d(0, 0, 0px);
}
.layer-motherboard {
    transform: translate3d(0, 0, 8px);
}
.layer-cooling {
    transform: translate3d(0, 0, 16px);
}
.layer-switches {
    transform: translate3d(0, 0, 24px);
}
.layer-keycaps {
    transform: translate3d(0, 0, 32px);
}

/* Screen layers (inside screen-group) */
.screen-group .layer-screen-case {
    transform: translate3d(0, 0, 0px);
}
.screen-group .layer-display {
    transform: translate3d(0, 0, 6px);
}

/* ─── EXPLODED POSITIONS ─── */
body:has(#explode-trigger:checked) .layer-bottom-case {
    transform: translate3d(0, 0, 0px);
}
body:has(#explode-trigger:checked) .layer-motherboard {
    transform: translate3d(0, 0, 35px);
}
body:has(#explode-trigger:checked) .layer-cooling {
    transform: translate3d(0, 0, 60px);
}
body:has(#explode-trigger:checked) .layer-switches {
    transform: translate3d(0, 0, 85px);
}
body:has(#explode-trigger:checked) .layer-keycaps {
    transform: translate3d(0, 0, 110px);
}

/* Screen tilts open on explode - hinge stays at keyboard level */
body:has(#explode-trigger:checked) .screen-group .layer-screen-case {
    transform: translate3d(0, 0, 0px);
}
body:has(#explode-trigger:checked) .screen-group .layer-display {
    transform: translate3d(0, 0, 15px);
}

/* ─── HOVER DIM ─── */
.hero-viewport:hover .bp-layer {
    opacity: 0.12;
    transition: opacity 0.3s;
}
.hero-viewport:hover .bp-layer:hover {
    opacity: 1;
    filter: drop-shadow(0 0 6px var(--primary-line));
    z-index: 70;
}

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
    .hero-split {
        flex-direction: column;
    }
    .hero-left {
        width: 100%;
    }
    .hero-right {
        flex: none;
        width: 100%;
    }
    .hero-viewport {
        min-height: 280px;
    }
}

@media (max-width: 640px) {
    .hero {
        margin-bottom: 40px;
    }
    .hero-viewport {
        min-height: 240px;
    }
}

@media (max-width: 420px) {
    .hero {
        margin-bottom: 36px;
    }
}