/* Stage 6: 3D Configurator */

.config3d-hero {
    position: relative;
    min-height: 560px;
    display: flex;
    align-items: center;
    overflow: hidden;
    color: #fff;
}

.config3d-hero__bg,
.config3d-hero__overlay {
    position: absolute;
    inset: 0;
}

.config3d-hero__bg {
    background-size: cover;
    background-position: center;
    transform: scale(1.04);
}

.config3d-hero__overlay {
    background:
        radial-gradient(circle at 22% 25%, rgba(251,191,36,0.24), transparent 32%),
        linear-gradient(90deg, rgba(2,6,23,0.97), rgba(2,6,23,0.78), rgba(2,6,23,0.4));
}

.config3d-hero__content {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

.config3d-hero h1 {
    max-width: 900px;
    font-size: clamp(42px, 6vw, 76px);
    line-height: 0.95;
    margin: 22px 0;
}

.config3d-hero p {
    max-width: 760px;
    font-size: 20px;
    line-height: 1.65;
    color: #dbeafe;
}

.config3d-layout {
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr);
    gap: 28px;
    align-items: start;
}

.config3d-panel,
.config3d-view {
    border: 1px solid rgba(255,255,255,0.13);
    background: rgba(15,23,42,0.72);
    backdrop-filter: blur(18px);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 0 24px 70px rgba(0,0,0,0.35);
}

.config3d-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 14px;
}

.config3d-checks {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 10px;
    margin: 18px 0 24px;
}

.config3d-checks label {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    min-height: 44px;
    border-radius: 14px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    color: #e5e7eb;
}

.config3d-checks input {
    width: auto;
}

.config3d-view {
    position: sticky;
    top: 90px;
}

.config3d-view__top {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
}

.config3d-view__top h3 {
    margin-top: 8px;
}

.config3d-rotate {
    border: 1px solid rgba(255,255,255,0.18);
    background: rgba(255,255,255,0.06);
    color: #fff;
    border-radius: 12px;
    padding: 10px 14px;
    cursor: pointer;
}

.scene-wrap {
    height: 430px;
    margin: 20px 0;
    border-radius: 24px;
    background:
        radial-gradient(circle at 50% 18%, rgba(251,191,36,.16), transparent 28%),
        linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
    border: 1px solid rgba(255,255,255,.12);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    perspective: 1000px;
}

.scene {
    position: relative;
    width: 620px;
    height: 330px;
    transform-style: preserve-3d;
    transform: rotateX(58deg) rotateZ(-38deg);
    transition: transform .35s ease;
}

.scene.scene--alt {
    transform: rotateX(58deg) rotateZ(-22deg);
}

.ground {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 600px;
    height: 280px;
    transform: translate(-50%, -50%) translateZ(-4px);
    background:
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 32px 32px;
    border: 1px solid rgba(251,191,36,.16);
    border-radius: 18px;
}

.building3d {
    --w: 220px;
    --d: 320px;
    --h: 110px;
    position: absolute;
    left: 50%;
    top: 50%;
    width: var(--w);
    height: var(--d);
    transform: translate(-50%, -50%) translateZ(0);
    transform-style: preserve-3d;
    transition: all .35s ease;
}

.face {
    position: absolute;
    background:
        repeating-linear-gradient(90deg, rgba(255,255,255,.12) 0 2px, transparent 2px 28px),
        linear-gradient(135deg, rgba(148,163,184,.55), rgba(30,41,59,.9));
    border: 2px solid rgba(251,191,36,.75);
    box-shadow: inset 0 0 30px rgba(2,6,23,.35);
}

.face-front {
    width: var(--w);
    height: var(--h);
    bottom: calc(var(--d) * -0.5);
    left: 0;
    transform: rotateX(90deg) translateY(calc(var(--h) * -1));
    transform-origin: top;
}

.face-back {
    width: var(--w);
    height: var(--h);
    top: calc(var(--d) * -0.5);
    left: 0;
    transform: rotateX(90deg);
    transform-origin: bottom;
}

.face-left {
    width: var(--d);
    height: var(--h);
    left: calc(var(--d) * -0.5);
    top: 0;
    transform: rotateY(90deg) rotateZ(90deg);
    transform-origin: right top;
}

.face-right {
    width: var(--d);
    height: var(--h);
    right: calc(var(--d) * -0.5);
    top: 0;
    transform: rotateY(90deg) rotateZ(90deg);
    transform-origin: right top;
}

.roof {
    position: absolute;
    width: calc(var(--w) / 2 + 8px);
    height: var(--d);
    top: 0;
    background:
        repeating-linear-gradient(90deg, rgba(255,255,255,.13) 0 2px, transparent 2px 30px),
        linear-gradient(135deg, #fbbf24, #b45309);
    border: 2px solid rgba(251,191,36,.8);
    opacity: .96;
}

.roof-left {
    left: -4px;
    transform-origin: right center;
    transform: rotateY(-30deg) translateZ(var(--h));
}

.roof-right {
    right: -4px;
    transform-origin: left center;
    transform: rotateY(30deg) translateZ(var(--h));
}

.gate {
    position: absolute;
    bottom: 0;
    width: 42px;
    height: 56px;
    background: rgba(2,6,23,.78);
    border: 2px solid rgba(251,191,36,.7);
    display: none;
}

.gate-1 { left: 42%; display: block; }
.gate-2 { left: 20%; }
.gate-3 { right: 16%; }

.solar-panel {
    position: absolute;
    width: 58px;
    height: 96px;
    background:
        linear-gradient(90deg, rgba(255,255,255,.22) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,.22) 1px, transparent 1px),
        linear-gradient(135deg, #0f172a, #1d4ed8);
    background-size: 14px 14px, 14px 14px, auto;
    border: 1px solid rgba(147,197,253,.7);
    transform: rotateY(30deg) translateZ(calc(var(--h) + 10px));
    top: 60px;
    right: 30px;
    display: none;
}

.solar-2 {
    top: 170px;
}

.side-canopy {
    position: absolute;
    width: 92px;
    height: var(--d);
    top: 0;
    right: calc(var(--w) * -0.45);
    background: linear-gradient(135deg, rgba(251,191,36,.45), rgba(180,83,9,.35));
    border: 1px solid rgba(251,191,36,.6);
    transform: translateZ(calc(var(--h) * .58));
    display: none;
}

.floor-lines {
    position: absolute;
    left: 0;
    bottom: calc(var(--d) * -0.5);
    width: var(--w);
    height: var(--h);
    pointer-events: none;
    transform: rotateX(90deg) translateY(calc(var(--h) * -1));
    transform-origin: top;
}

.floor-lines span {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(251,191,36,.65);
}

.config3d-stats {
    display: grid;
    gap: 10px;
}

.config3d-stats div {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,.1);
}

.config3d-stats span {
    color: #cbd5e1;
}

.config3d-stats strong {
    color: #fbbf24;
    text-align: right;
}

.config3d-warning {
    margin-top: 18px;
    padding: 14px;
    border-radius: 14px;
    background: rgba(251,191,36,.1);
    border: 1px solid rgba(251,191,36,.35);
    color: #fde68a;
    line-height: 1.5;
}

@media (max-width: 1080px) {
    .config3d-layout {
        grid-template-columns: 1fr;
    }

    .config3d-view {
        position: static;
    }
}

@media (max-width: 680px) {
    .config3d-grid,
    .config3d-checks {
        grid-template-columns: 1fr;
    }

    .scene-wrap {
        height: 340px;
    }

    .scene {
        transform: scale(.76) rotateX(58deg) rotateZ(-38deg);
    }

    .config3d-view__top {
        flex-direction: column;
    }
}