.project-hero {
    position: relative;
    min-height: 70svh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow: hidden;
}
.project-hero__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%);
}
.project-hero__overlay { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.45); }

.project-hero__top { position: relative; z-index: 2; padding-top: 64px; }
.project-hero__top .breadcrumbs { padding: 12px 0; }
.project-hero__title-wrap { position: relative; z-index: 2; padding-bottom: 48px; }
.project-hero__title {
    color: #fff;
    font-size: clamp(28px, 5vw, 64px);
    letter-spacing: 0.02em;
    max-width: 900px;
}

.project-meta { border-bottom: 1px solid var(--c-line); }
.project-meta__row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 24px;
    padding: 24px var(--gutter);
}
.project-meta__item { display: flex; flex-direction: column; gap: 4px; }
.project-meta__label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--c-text-2);
}
.project-meta__value { font-size: 16px; font-weight: 500; color: var(--c-text); }

.project-text__row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 32px 0;
    border-bottom: 1px solid var(--c-line);
}
.project-text .section + .project-text__row,
.project-text__row:last-child { border-bottom: 0; }
.project-text__label {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.28em;
    color: var(--c-text-2);
}
.project-text__body { font-size: 15px; color: var(--c-text-3); line-height: 1.9; }

.project-section__title {
    font-size: clamp(14px, 1.5vw, 18px);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}
.project-section__desc { font-size: 15px; color: var(--c-text-3); line-height: 1.85; margin-bottom: 32px; max-width: 760px; }

.photo-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.photo-grid__item {
    position: relative;
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    padding: 0;
    border: 0;
    background: transparent;
    overflow: hidden;
}
.photo-grid__item img { width: 100%; height: 100%; object-fit: cover; }
.photo-grid__item.is-feature { grid-column: 1 / -1; aspect-ratio: 16 / 8; }
.photo-grid--1 .photo-grid__item { grid-column: 1 / -1; aspect-ratio: 16 / 9; }

.project-video__frame {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    aspect-ratio: 16 / 9;
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
}
.project-video__frame iframe {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
}

.docs__tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--c-line);
}
.docs__tab {
    padding: 10px 18px;
    border: 1px solid var(--c-line-strong);
    border-radius: 999px;
    background: transparent;
    color: var(--c-text-2);
    font: inherit;
    font-size: 14px;
    cursor: pointer;
    transition: background-color var(--ease), color var(--ease), border-color var(--ease);
}
.docs__tab:hover { background: var(--c-card); color: var(--c-text); }
.docs__tab.is-active {
    background: var(--c-dark);
    border-color: var(--c-dark);
    color: #fff;
}
.docs__panel[hidden] { display: none; }
.docs__desc {
    max-width: 760px;
    margin: 0 0 24px;
    font-size: 15px;
    line-height: 1.85;
    color: var(--c-text-3);
}

.docs__sheets {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    max-width: 1000px;
    margin: 0 auto;
}
.docs__sheet {
    position: relative;
    width: 100%;
    margin: 0;
    background: #fff;
    border: 1px solid var(--c-line);
    box-shadow: 0 2px 14px rgba(0, 0, 0, 0.06);
}
.docs__sheet canvas {
    display: block;
    width: 100%;
    height: auto;
}

.docs__sheet:not(.is-ready)::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, var(--c-bg-alt) 30%, rgba(255, 255, 255, 0.6) 50%, var(--c-bg-alt) 70%);
    background-size: 300% 100%;
    animation: docs-shimmer 1.4s ease-in-out infinite;
}
@keyframes docs-shimmer {
    from { background-position: 150% 0; }
    to   { background-position: -150% 0; }
}
@media (prefers-reduced-motion: reduce) {
    .docs__sheet:not(.is-ready)::after { animation: none; }
}
.docs__sheet-no {
    position: absolute;
    right: 10px;
    bottom: 10px;
    z-index: 1;
    padding: 3px 8px;
    background: rgba(0, 0, 0, 0.55);
    color: #fff;
    font-size: 11px;
    letter-spacing: 0.08em;
}
.docs__sheet:not(.is-ready) .docs__sheet-no { display: none; }
.docs__status {
    margin: 0;
    padding: 32px 0;
    font-size: 14px;
    color: var(--c-text-3);
}
.docs__status.is-error { color: var(--c-text); }

.docs__download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    font-size: 14px;
    color: var(--c-text);
    border-bottom: 1px solid var(--c-line-strong);
}
.docs__size { color: var(--c-text-3); }

.link-back { display: inline-block; }

@media (min-width: 768px) {
    .project .section { padding: 96px 0; }

    .project-hero__top { padding-top: var(--header-h); }

    .docs__sheets { gap: 24px; }
    .docs__download { margin-bottom: 32px; }

    .project-meta__row {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 24px 56px;
        align-items: flex-start;
        min-height: 80px;
    }
    .project-meta__item {
        flex-direction: column;
        align-items: baseline;
        gap: 8px;
    }
    .project-back {
        padding: 0 0 64px;
    }

    .project-text__row { grid-template-columns: 200px 1fr; gap: 32px; }
    .photo-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.lightbox[hidden] { display: none; }
.lightbox {
    touch-action: pan-y pinch-zoom;
}
.lightbox__img {
    max-width: 92vw;
    max-height: 90vh;
    object-fit: contain;
    cursor: pointer;
    user-select: none;
    -webkit-user-drag: none;
}
.lightbox__close,
.lightbox__nav {
    position: absolute;
    background: transparent;
    border: 0;
    color: #fff;
    font-size: 40px;
    line-height: 1;
    padding: 12px;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}
.lightbox__close:hover,
.lightbox__nav:hover { opacity: 1; }
.lightbox__close { top: 16px; right: 24px; font-size: 32px; }
.lightbox__nav--prev { left: 12px; top: 50%; transform: translateY(-50%); }
.lightbox__nav--next { right: 12px; top: 50%; transform: translateY(-50%); }
.lightbox__counter {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    letter-spacing: 0.1em;
}