/* ==========================================================
   TEKNE — 3D scroll-driven additions
   Load this AFTER theme.css and landing.css.
   Uses the same design tokens (culori, fonturi) definite în theme.css.
   Tehnica de scroll pinning e aceeași ca în jar-burger.html:
   container înalt (Nx100vh) + .sticky (position:sticky, top:0, 100vh)
   + JS care citește progresul din getBoundingClientRect() și aplică
   transform-uri 3D (rotateY/translateZ) pe cadre.
   ========================================================== */

/* ============ PROCES — 3D PINNED COVERFLOW ============ */
.process-3d {
    position: relative;
    background: var(--color-dark);
}

.process-3d-pin {
    position: relative;
    height: 340vh; /* 3 etape → suficient spațiu de scroll pentru tranziții line */
}

.process-3d-sticky {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(ellipse 900px 700px at 50% 38%, var(--color-accent-2-soft), transparent 62%),
        var(--color-dark);
}

.process-3d-head {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    text-align: center;
    z-index: 5;
    padding: 0 1.5rem;
}

    .process-3d-head .eyebrow {
        display: inline-flex;
    }

    .process-3d-head h2 {
        font-family: var(--font-display);
        font-size: clamp(1.8rem, 3.2vw, 2.3rem);
        font-weight: 650;
        letter-spacing: -0.01em;
        color: #FFFFFF;
        margin: 0.5rem 0 0;
    }

.process-3d-stage {
    position: relative;
    width: min(400px, 66vw);
    height: min(400px, 46vh);
    perspective: 1400px;
    margin-top: 2.5rem;
}

.process-3d-card {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transform-style: preserve-3d;
    will-change: transform, opacity;
    pointer-events: none;
}

.process-3d-glow {
    position: absolute;
    inset: -12%;
    border-radius: 50%;
    background: radial-gradient(circle, var(--color-accent-soft), transparent 70%);
    filter: blur(24px);
    z-index: 0;
}

.process-3d-img {
    position: relative;
    z-index: 1;
    width: 82%;
    height: 82%;
    object-fit: contain;
    filter: drop-shadow(0 24px 40px rgba(0, 0, 0, 0.4));
}

.process-3d-caption {
    position: absolute;
    left: 50%;
    bottom: 13%;
    transform: translate(-50%, 14px);
    width: min(460px, 86vw);
    text-align: center;
    opacity: 0;
    transition: opacity 0.35s ease, transform 0.35s ease;
    z-index: 5;
    pointer-events: none;
}

    .process-3d-caption.active {
        opacity: 1;
        transform: translate(-50%, 0);
    }

.process-3d-eyebrow {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    margin-bottom: 0.5rem;
}

.process-3d-caption h3 {
    font-family: var(--font-display);
    font-size: clamp(1.15rem, 2vw, 1.45rem);
    font-weight: 650;
    color: #FFFFFF;
    margin: 0 0 0.5rem;
}

.process-3d-caption p {
    color: rgba(255, 255, 255, 0.66);
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 420px;
    margin: 0 auto;
}

.process-3d-progress {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 5;
}

    .process-3d-progress span {
        position: relative;
        width: 40px;
        height: 3px;
        border-radius: 3px;
        background: rgba(255, 255, 255, 0.14);
        overflow: hidden;
        display: block;
    }

        .process-3d-progress span i {
            position: absolute;
            inset: 0;
            right: 100%;
            display: block;
            background: var(--color-accent-light);
        }

@media (max-width: 700px) {
    .process-3d-pin {
        height: 280vh;
    }

    .process-3d-stage {
        width: 78vw;
        height: 40vh;
        margin-top: 2rem;
    }

    .process-3d-caption {
        bottom: 16%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .process-3d-pin {
        height: auto;
    }

    .process-3d-sticky {
        position: relative;
        height: auto;
        padding: 5rem 1.5rem;
    }

    .process-3d-stage {
        margin-top: 2rem;
    }

    .process-3d-caption {
        position: relative;
        left: auto;
        bottom: auto;
        transform: none;
        opacity: 1;
        margin: 0 auto 1.5rem;
    }

    .process-3d-progress {
        display: none;
    }
}

/* ============ HERO — 3D scroll parallax ============ */
.hero-illustration {
    transition: transform 0.1s linear;
    will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
    .hero-illustration {
        transition: none;
    }
}

/* ============ CARD REVEALS — 3D tilt-in on scroll ============ */
.about-grid,
.diff-grid,
.services-grid,
.impact-grid {
    perspective: 1200px;
}

.reveal-3d {
    opacity: 0;
    transform: perspective(900px) rotateX(14deg) translateY(26px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    transition-delay: var(--delay, 0ms);
}

    .reveal-3d.is-visible {
        opacity: 1;
        transform: perspective(900px) rotateX(0deg) translateY(0);
    }

@media (prefers-reduced-motion: reduce) {
    .reveal-3d {
        transition: none;
        opacity: 1;
        transform: none;
    }
}