/* ─── Container ─────────────────────────────────────────────────────────── */
.sg-selector {
    display: flex;
    width: 100%;
    height: calc(100dvh - 70px);
    min-height: 500px;
    overflow: hidden;
}

/* ─── Panel base ─────────────────────────────────────────────────────────── */
.sg-panel {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: flex 1s ease-in-out;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
}
.sg-panel:last-child {
    border-right: none;
}

/* Expand hovered panel, slightly compress others */
.sg-selector:has(.sg-panel:hover) .sg-panel {
    flex: 0.75;
}
.sg-panel:hover {
    flex: 1.5 !important;
}

/* ─── Background layer ───────────────────────────────────────────────────── */
.sg-panel__bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 1s ease-in-out,
                filter 1s ease;
}

.sg-panel:hover .sg-panel__bg {
    transform: scale(1.3);
    filter: brightness(0.55);
}

/* Individual backgrounds */
.sg-panel--phosaigon .sg-panel__bg {
    background-image: url('bg_phosaigon.jpg');
    background-color: #1c1a18;
}
.sg-panel--misssaigon .sg-panel__bg {
    background-image: url('bg_misssaigon.png');
    background-color: #2a2826;
}
.sg-panel--niuba .sg-panel__bg {
    background-image: url('bg_niuba.png');
    background-color: #8a9a6a;
}
.sg-panel--soon .sg-panel__bg {
    background-color: #e5e5e0;
}
.sg-panel--vietlab .sg-panel__bg {
    background-color: #e5e5e0;
}

/* Dividers between light panels */
.sg-panel--soon,
.sg-panel--vietlab {
    border-right-color: rgba(0, 0, 0, 0.1);
}

/* Vietlab logo: SVG is 93:70 ratio — constrain width instead of height */
.sg-panel--vietlab .sg-panel__logo img {
    height: auto !important;
    width: 60% !important;
    max-width: 160px !important;
}

/* ─── Logo ───────────────────────────────────────────────────────────────── */
.sg-panel__logo {
    position: relative;
    z-index: 1;
    padding: 0 40px;
    width: 100%;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
}
.sg-panel__logo img {
    display: block;
    height: 150px !important;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    transition: transform 1s ease-in-out;
}
.sg-panel--niuba .sg-panel__logo img {
    height: 80px !important;
}
.sg-panel:hover .sg-panel__logo img {
    transform: scale(1.5);
}

/* ─── Coming Soon text ───────────────────────────────────────────────────── */
.sg-panel__soon-text {
    position: relative;
    z-index: 1;
    font-family: 'Ysabeau Office', sans-serif;
    font-weight: 300;
    font-size: 13px;
    letter-spacing: 0.2em;
    color: #3a3a38;
    text-transform: uppercase;
    white-space: nowrap;
    transition: transform 1s ease-in-out;
}
.sg-panel--soon:hover .sg-panel__soon-text {
    transform: scale(1.05);
}

@media (max-width: 1300px) {
    .sg-panel:hover .sg-panel__logo img {
        transform: scale(1.3);
    }
}

@media (max-width: 1000px) {
    .sg-panel:hover .sg-panel__logo img {
        transform: scale(1.1);
    }
}

@media (max-width: 850px) {
    .sg-panel:hover .sg-panel__logo img {
        transform: scale(0.8);
    }
}

/* ─── Mobile: vertical stack ─────────────────────────────────────────────── */
@media (max-width: 768px) {
    .sg-selector {
        flex-direction: column;
        /* height: calc(100dvh - 70px) inherited from base — no override */
    }
    .sg-panel {
        flex: 1;
        min-height: 0;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    }
    .sg-panel:hover .sg-panel__logo img {
        transform: scale(1.4);
    }
    .sg-panel--soon,
    .sg-panel--vietlab {
        border-bottom-color: rgba(0, 0, 0, 0.1);
    }
    .sg-panel:last-child {
        border-bottom: none;
    }
    /* disable expand effect on mobile */
    .sg-selector:has(.sg-panel:hover) .sg-panel,
    .sg-panel:hover {
        flex: 1 !important;
    }
    .sg-panel__logo {
        padding: 0 20px;
    }
    .sg-panel__logo img {
        height: 55px !important;
        width: auto;
        max-width: 100%;
    }
    .sg-panel--niuba .sg-panel__logo img {
        height: 38px !important;
    }
    .sg-panel--vietlab .sg-panel__logo img {
        height: auto !important;
        width: 45% !important;
        max-width: 110px !important;
    }
    .sg-panel__soon-text {
        white-space: normal;
        text-align: center;
        line-height: 1.5;
    }
}