body {
    background:
        radial-gradient(circle at 18% 12%, rgba(181, 90, 75, 0.08), transparent 28%),
        radial-gradient(circle at 82% 18%, rgba(106, 76, 90, 0.08), transparent 30%),
        linear-gradient(rgba(245, 240, 232, 0.86), rgba(245, 240, 232, 0.92)),
        url("../images/bg.jpg"),
        #f5f0e8;
    color: #1d1917;
}

.immersive-page {
    padding: 112px 5vw 72px;
}

.immersive-catalog-hero {
    width: min(1160px, 100%);
    margin: 0 auto 26px;
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    position: relative;
}

.immersive-catalog-hero::after {
    content: "";
    width: clamp(92px, 12vw, 150px);
    height: 1px;
    position: absolute;
    left: 0;
    bottom: -12px;
    background: linear-gradient(90deg, rgba(181, 90, 75, 0.56), transparent);
}

.immersive-catalog-hero p {
    margin: 0 0 8px;
    color: #b55a4b;
    font-family: Georgia, serif;
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.immersive-catalog-hero h1 {
    margin: 0;
    color: #2a201c;
    font-family: "KaiTi", "STKaiti", "Source Han Serif SC", serif;
    font-size: clamp(34px, 5vw, 66px);
    font-weight: 500;
    line-height: 1.05;
}

.catalog-return {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(181, 90, 75, 0.28);
    border-radius: 999px;
    padding: 10px 16px;
    color: #6a4c5a;
    background: rgba(255, 253, 248, 0.78);
    font-weight: 800;
    text-decoration: none;
    box-shadow: 0 8px 22px rgba(42, 31, 23, 0.08);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.catalog-return:hover {
    border-color: rgba(181, 90, 75, 0.48);
    box-shadow: 0 0 18px rgba(181, 90, 75, 0.18), 0 10px 24px rgba(42, 31, 23, 0.1);
    transform: translateY(-2px);
}

.catalog-shell {
    width: min(1160px, 100%);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 184px 1fr;
    gap: 28px;
    align-items: start;
}

.catalog-filter {
    position: sticky;
    top: 92px;
    display: grid;
    gap: 12px;
    border: 1px solid rgba(126, 95, 61, 0.2);
    border-radius: 8px;
    padding: 16px;
    background:
        linear-gradient(180deg, rgba(255, 253, 248, 0.86), rgba(245, 240, 232, 0.76));
    box-shadow: 0 16px 40px rgba(42, 31, 23, 0.1);
    backdrop-filter: blur(8px);
}

.catalog-filter span {
    color: #9b5a45;
    font-weight: 900;
    font-size: 14px;
}

.catalog-filter button {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(126, 95, 61, 0.12);
    border-radius: 6px;
    padding: 10px 12px;
    color: #4f3b49;
    background: rgba(245, 240, 232, 0.72);
    cursor: pointer;
    font-weight: 800;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.catalog-filter button:hover,
.catalog-filter button.active {
    border-color: rgba(181, 90, 75, 0.55);
    color: #7c3e32;
    background: #fffdf8;
    box-shadow: 0 0 18px rgba(181, 90, 75, 0.18);
}

.catalog-filter button.active::after {
    content: "";
    width: 4px;
    position: absolute;
    top: 9px;
    bottom: 9px;
    right: 9px;
    border-radius: 999px;
    background: #b55a4b;
}

.catalog-board {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
}

.catalog-empty {
    grid-column: 1 / -1;
    border: 1px solid rgba(126, 95, 61, 0.18);
    border-radius: 8px;
    padding: 56px 20px;
    background: rgba(255, 253, 248, 0.72);
    color: #87786b;
    text-align: center;
}

.immersive-card {
    position: relative;
    display: grid;
    min-height: 320px;
    border: 1px solid rgba(126, 95, 61, 0.18);
    border-radius: 8px;
    overflow: hidden;
    background:
        linear-gradient(145deg, rgba(255, 253, 248, 0.92), rgba(245, 240, 232, 0.72));
    box-shadow: 0 16px 38px rgba(42, 31, 23, 0.1);
    text-decoration: none;
    color: inherit;
    transition: transform 0.36s ease, box-shadow 0.36s ease, border-color 0.36s ease;
}

.immersive-card:hover,
.immersive-card:focus-visible {
    border-color: rgba(246, 221, 139, 0.76);
    box-shadow: 0 0 24px rgba(246, 221, 139, 0.46), 0 18px 44px rgba(42, 31, 23, 0.14);
    transform: translateY(-5px);
    outline: none;
}

.immersive-media {
    position: relative;
    min-height: 220px;
    overflow: hidden;
    background: #231c19;
}

.immersive-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(29, 25, 23, 0.02), rgba(29, 25, 23, 0.16));
    pointer-events: none;
}

.immersive-media img,
.immersive-media video {
    width: 100%;
    height: 100%;
    min-height: 220px;
    display: block;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.immersive-media video {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.35s ease, transform 0.8s ease;
}

.immersive-card:hover img,
.immersive-card:hover video {
    transform: scale(1.045);
}

.immersive-card.is-previewing .video-media video {
    opacity: 1;
}

.video-badge {
    position: absolute;
    left: 14px;
    bottom: 14px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(255, 250, 240, 0.26);
    border-radius: 999px;
    padding: 7px 10px;
    color: #fffaf0;
    background: rgba(29, 25, 23, 0.62);
    font-family: "KaiTi", "STKaiti", serif;
    font-size: 13px;
    backdrop-filter: blur(8px);
}

.immersive-card.is-scrubbing .video-badge {
    background: rgba(181, 90, 75, 0.78);
}

.immersive-copy {
    padding: 22px 24px;
}

.immersive-copy small {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
    color: #8b4a35;
    font-weight: 900;
}

.immersive-copy h2 {
    margin: 0 0 12px;
    color: #1d1917;
    font-size: clamp(22px, 2.4vw, 30px);
    line-height: 1.2;
}

.immersive-copy p {
    margin: 0 0 18px;
    color: #4d453f;
    font-size: 15px;
    line-height: 1.9;
}

.immersive-copy b {
    color: #7c4b1d;
    font-size: 14px;
}

.card-wide {
    grid-column: span 6;
    grid-template-columns: minmax(280px, 32%) 1fr;
    min-height: 330px;
}

.card-large {
    grid-column: span 3;
    min-height: 390px;
}

.card-large .immersive-media {
    height: 210px;
}

.card-split {
    grid-column: span 2;
    grid-template-columns: 50% 1fr;
    min-height: 330px;
}

.card-text-first {
    grid-column: span 2;
}

.card-text-first .immersive-media {
    order: 2;
    height: 200px;
}

.card-tall {
    grid-column: span 2;
    grid-template-columns: 52% 1fr;
    min-height: 360px;
}

.card-feature {
    grid-column: span 4;
    min-height: 360px;
}

.card-feature .immersive-media {
    height: 210px;
}

.immersive-card[hidden] {
    display: none;
}

.catalog-filter-empty {
    grid-column: 1 / -1;
    min-height: 220px;
    display: grid;
    place-items: center;
    border: 1px dashed rgba(181, 90, 75, 0.38);
    border-radius: 8px;
    padding: 34px 24px;
    color: #7d675a;
    background:
        linear-gradient(135deg, rgba(255, 253, 248, 0.82), rgba(245, 240, 232, 0.68));
    line-height: 1.9;
    text-align: center;
    box-shadow: inset 0 0 32px rgba(181, 90, 75, 0.05);
}

.immersive-detail {
    width: min(1160px, 100%);
    margin: 0 auto;
}

.detail-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.detail-head button,
.detail-head span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(181, 90, 75, 0.28);
    border-radius: 999px;
    padding: 10px 16px;
    color: #6a4c5a;
    background: rgba(255, 253, 248, 0.78);
    font-weight: 900;
    box-shadow: 0 8px 22px rgba(42, 31, 23, 0.08);
}

.detail-head button {
    cursor: pointer;
}

.detail-stage-shell {
    display: grid;
    gap: 18px;
}

.detail-model-stage {
    position: relative;
    min-height: clamp(430px, 58vw, 720px);
    overflow: hidden;
    border: 1px solid rgba(126, 95, 61, 0.2);
    border-radius: 8px;
    background:
        radial-gradient(circle at 50% 38%, rgba(181, 90, 75, 0.18), transparent 36%),
        linear-gradient(145deg, rgba(34, 27, 24, 0.96), rgba(65, 47, 39, 0.9));
    box-shadow: 0 24px 70px rgba(42, 31, 23, 0.18);
    cursor: grab;
    touch-action: none;
}

.detail-model-stage.is-panning {
    cursor: move;
}

.detail-model-stage:fullscreen {
    border-radius: 0;
    min-height: 100vh;
}

.detail-model-stage canvas,
.detail-model-stage img,
.detail-model-stage video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.detail-model-stage canvas {
    z-index: 2;
}

.detail-model-stage img {
    object-fit: contain;
    padding: 26px;
    opacity: 0.96;
    transition: opacity 0.25s ease;
    transform-origin: center;
}

.detail-model-stage video {
    z-index: 2;
    display: block;
    object-fit: contain;
    padding: 18px;
    background: rgba(21, 17, 15, 0.7);
}

.detail-model-stage canvas[hidden],
.detail-model-stage img[hidden],
.detail-model-stage video[hidden] {
    display: none;
}

.detail-model-stage.has-model img {
    opacity: 0.18;
}

.detail-model-stage.is-panorama {
    background:
        radial-gradient(circle at 50% 40%, rgba(246, 221, 139, 0.12), transparent 34%),
        linear-gradient(145deg, rgba(31, 25, 22, 0.96), rgba(56, 41, 34, 0.92));
}

.detail-model-stage.is-panorama img {
    object-fit: cover;
    padding: 0;
}

.detail-model-stage.is-video {
    cursor: default;
    background:
        linear-gradient(145deg, rgba(26, 22, 20, 0.98), rgba(54, 40, 34, 0.94));
}

.detail-model-stage.is-object {
    background:
        radial-gradient(circle at 50% 48%, rgba(255, 253, 248, 0.18), transparent 40%),
        linear-gradient(145deg, rgba(36, 28, 24, 0.96), rgba(77, 55, 42, 0.88));
}

.detail-model-stage.is-object img {
    padding: clamp(18px, 4vw, 44px);
}

.detail-model-stage.is-model img {
    padding: clamp(18px, 4vw, 34px);
}

.detail-stage-hint {
    position: absolute;
    left: 18px;
    bottom: 18px;
    z-index: 3;
    border: 1px solid rgba(255, 250, 240, 0.24);
    border-radius: 999px;
    padding: 9px 13px;
    color: #fffaf0;
    background: rgba(29, 25, 23, 0.58);
    font-family: "KaiTi", "STKaiti", serif;
    backdrop-filter: blur(8px);
}

.detail-copy {
    display: grid;
    gap: 10px;
    border: 1px solid rgba(126, 95, 61, 0.18);
    border-radius: 8px;
    padding: 24px 28px;
    background:
        linear-gradient(135deg, rgba(255, 253, 248, 0.9), rgba(245, 240, 232, 0.72));
    box-shadow: 0 14px 36px rgba(42, 31, 23, 0.08);
}

.detail-copy small {
    color: #8b4a35;
    font-weight: 900;
}

.detail-copy h2 {
    margin: 0;
    color: #1d1917;
    font-size: clamp(28px, 4vw, 46px);
    line-height: 1.15;
}

.detail-copy p {
    max-width: 880px;
    margin: 0;
    color: #4d453f;
    font-size: 16px;
    line-height: 1.9;
}

@media (max-width: 980px) {
    .catalog-shell {
        grid-template-columns: 1fr;
    }

    .catalog-filter {
        position: static;
        display: flex;
        flex-wrap: wrap;
    }

    .catalog-board {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .card-wide,
    .card-large,
    .card-split,
    .card-text-first,
    .card-tall,
    .card-feature {
        grid-column: span 2;
    }
}

@media (max-width: 640px) {
    .immersive-page {
        padding: 86px 16px 42px;
    }

    .immersive-catalog-hero {
        align-items: flex-start;
        flex-direction: column;
    }

    .catalog-board {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .card-wide,
    .card-large,
    .card-split,
    .card-text-first,
    .card-tall,
    .card-feature {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }

    .immersive-card,
    .card-wide,
    .card-split,
    .card-tall {
        min-height: auto;
    }

    .detail-head {
        align-items: flex-start;
        flex-direction: column;
    }

    .detail-model-stage {
        min-height: 420px;
    }

    .detail-stage-hint {
        right: 12px;
        left: 12px;
        text-align: center;
    }

    .detail-copy {
        padding: 18px;
    }
}