/* ============================================
   TECHKNOW — 3D walk-through for the portfolio pages
   ============================================ */
.g3d-track { position: relative; }

.g3d-stage {
    position: sticky;
    top: 0;
    height: 100vh;
    height: 100svh;
    overflow: hidden;
    background:
        radial-gradient(ellipse 70% 55% at 60% 35%, rgba(227, 178, 107, 0.10), transparent 70%),
        linear-gradient(180deg, #0A0C16 0%, #141933 55%, #0D1020 100%);
}

.g3d-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    touch-action: pan-y;
}

.g3d-head {
    position: absolute;
    top: 118px;
    left: max(32px, 6vw);
    pointer-events: none;
}

.g3d-eyebrow {
    margin: 0 0 10px;
    font-size: 12px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--c-accent);
}

.g3d-title {
    margin: 0;
    font-size: clamp(30px, 3.4vw, 50px);
    line-height: 1.08;
    color: var(--c-text);
}

.g3d-info {
    position: absolute;
    left: max(32px, 6vw);
    bottom: max(64px, 11vh);
    width: min(380px, 30vw);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.g3d-info.is-swapping { opacity: 0; transform: translateY(8px); }

.g3d-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.g3d-count {
    font-size: 13px;
    letter-spacing: 0.2em;
    color: var(--c-text-secondary);
}

.g3d-year {
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--c-accent);
    color: #1B1A22;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.g3d-year:empty { display: none; }

.g3d-name {
    margin: 0 0 6px;
    font-size: clamp(28px, 2.8vw, 42px);
    line-height: 1.1;
    color: var(--c-text);
}

.g3d-loc {
    margin: 0 0 24px;
    color: var(--c-text-secondary);
    font-size: 16px;
}

.g3d-nav {
    position: absolute;
    right: max(32px, 6vw);
    bottom: max(64px, 11vh);
    display: flex;
    gap: 12px;
}

.g3d-nav button {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid rgba(227, 178, 107, 0.5);
    background: rgba(10, 12, 22, 0.55);
    color: var(--c-text);
    font-size: 18px;
    cursor: pointer;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.g3d-nav button:hover { background: rgba(227, 178, 107, 0.2); border-color: var(--c-accent); }

.g3d-hint {
    position: absolute;
    left: 50%;
    bottom: 26px;
    transform: translateX(-50%);
    font-size: 12px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--c-text-secondary);
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.g3d-progress {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 3px;
    background: rgba(255, 255, 255, 0.08);
}

.g3d-progress span { display: block; height: 100%; width: 0; background: var(--c-accent); }

/* The overview grid follows the walk-through */
body.has-g3d .portfolio-page { min-height: 0 !important; }

@media (max-width: 1100px) and (min-width: 769px) {
    .g3d-info { width: 34vw; }
}

@media (max-width: 768px) {
    .g3d-head { top: 96px; left: 20px; right: 20px; }
    .g3d-title { font-size: 28px; }
    .g3d-info { left: 20px; right: 20px; bottom: 96px; width: auto; }
    .g3d-name { font-size: 26px; }
    .g3d-loc { margin-bottom: 16px; font-size: 15px; }
    .g3d-nav { left: 20px; right: auto; bottom: 26px; }
    .g3d-nav button { width: 46px; height: 46px; }
    .g3d-hint { display: none; }
}

@media (max-height: 640px) and (min-width: 769px) {
    .g3d-head { top: 92px; }
    .g3d-info { bottom: 40px; }
    .g3d-nav { bottom: 40px; }
}