.site-gate {
    position: fixed;
    inset: 0;
    z-index: 2147483646;
    overflow: hidden;
    isolation: isolate;
    background:
        radial-gradient(circle at 50% 48%, rgba(48, 57, 94, 0.16), transparent 20%),
        radial-gradient(circle at 70% 20%, rgba(45, 74, 122, 0.14), transparent 22%),
        radial-gradient(circle at 18% 82%, rgba(78, 61, 112, 0.12), transparent 24%),
        linear-gradient(180deg, #020309 0%, #03050a 55%, #010207 100%);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity 700ms ease, visibility 700ms ease;
}

html.gate-open,
body.gate-open {
    overflow: hidden;
}

body.gate-passed .site-gate {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.site-gate-nebula,
.site-gate-nebula::before,
.site-gate-nebula::after {
    content: "";
    position: absolute;
    inset: -18%;
    filter: blur(48px);
}

.site-gate-nebula {
    background:
        radial-gradient(circle at 28% 30%, rgba(92, 116, 194, 0.18), transparent 26%),
        radial-gradient(circle at 72% 60%, rgba(164, 102, 182, 0.12), transparent 24%);
    animation: siteGateNebula 20s ease-in-out infinite alternate;
}

.site-gate-nebula::before {
    background:
        radial-gradient(circle at 58% 18%, rgba(243, 215, 137, 0.08), transparent 20%),
        radial-gradient(circle at 18% 76%, rgba(86, 123, 186, 0.14), transparent 24%);
    animation: siteGateNebulaReverse 26s ease-in-out infinite alternate;
}

.site-gate-stars,
.site-gate-stars::before,
.site-gate-stars::after {
    content: "";
    position: absolute;
    inset: -10%;
}

.site-gate-stars {
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.95) 1px, transparent 1.6px),
        radial-gradient(circle, rgba(255, 255, 255, 0.45) 1px, transparent 1.5px);
    background-size: 190px 190px, 260px 260px;
    animation: siteGateStars 95s linear infinite;
}

.site-gate-stars::before {
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.75) 1px, transparent 1.6px),
        radial-gradient(circle, rgba(243, 215, 137, 0.5) 1px, transparent 1.6px);
    background-size: 320px 320px, 430px 430px;
    animation: siteGateStarsReverse 135s linear infinite;
}

.site-gate-stars::after {
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.45) 1px, transparent 1.5px);
    background-size: 145px 145px;
    animation: siteGateTwinkle 4.5s ease-in-out infinite alternate;
}

.site-gate-vignette {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at center, transparent 0, transparent 18%, rgba(2, 3, 9, 0.14) 42%, rgba(2, 3, 9, 0.74) 76%, rgba(1, 2, 7, 0.98) 100%);
}

.site-gate-wall {
    position: absolute;
    inset: 8% 4%;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 16px;
    opacity: 0.28;
    transform: perspective(1200px) rotateX(8deg);
}

.site-gate-tile {
    overflow: hidden;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    filter: saturate(0.75);
}

.site-gate-tile img,
.site-gate-tile video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.site-gate-tile:nth-child(1) { grid-column: 1 / span 2; }
.site-gate-tile:nth-child(2) { grid-column: 3; }
.site-gate-tile:nth-child(3) { grid-column: 4; }
.site-gate-tile:nth-child(4) { grid-column: 1; }
.site-gate-tile:nth-child(5) { grid-column: 2 / span 2; }
.site-gate-tile:nth-child(6) { grid-column: 4; }
.site-gate-tile:nth-child(7) { grid-column: 1 / span 2; }
.site-gate-tile:nth-child(8) { grid-column: 3 / span 2; }

.site-gate-center {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: grid;
    place-items: center;
    text-align: center;
}

.site-gate-logo {
    width: 148px;
    height: 148px;
    margin-bottom: 26px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.05),
        0 0 70px rgba(243, 215, 137, 0.1),
        0 28px 90px rgba(0, 0, 0, 0.5);
}

.site-gate-title {
    margin: 0;
    color: rgba(255, 255, 255, 0.94);
    font-family: "Times New Roman", Georgia, serif;
    font-size: clamp(1.2rem, 2.4vw, 1.52rem);
    font-weight: 400;
    letter-spacing: 0.42em;
    text-transform: uppercase;
}

.site-gate-title em {
    color: #f3d789;
    font-style: normal;
}

.site-gate-subtitle {
    margin: 18px 0 0;
    color: rgba(255, 255, 255, 0.48);
    font-size: 0.86rem;
    letter-spacing: 0.26em;
    text-transform: uppercase;
}

.site-gate-progress {
    position: relative;
    width: min(220px, 52vw);
    height: 2px;
    margin: 20px auto 0;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
}

.site-gate-progress span {
    position: absolute;
    inset: 0;
    width: 42%;
    border-radius: inherit;
    background: linear-gradient(90deg, transparent, rgba(243, 215, 137, 0.95), transparent);
    animation: siteGateProgressSweep 1.35s ease-in-out infinite;
}

.site-gate.is-ready .site-gate-progress span {
    width: 100%;
    background: linear-gradient(90deg, rgba(243, 215, 137, 0.42), #f3d789);
    animation: siteGateProgressComplete 520ms ease forwards;
}

.site-gate-enter {
    min-width: 148px;
    min-height: 42px;
    margin-top: 24px;
    padding: 0 18px;
    border: 1px solid rgba(243, 215, 137, 0.32);
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.88);
    background: rgba(255, 255, 255, 0.03);
    font-size: 0.76rem;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    backdrop-filter: blur(12px);
    cursor: pointer;
    transition:
        opacity 220ms ease,
        border-color 220ms ease,
        background 220ms ease,
        transform 220ms ease;
}

.site-gate.is-loading .site-gate-enter {
    opacity: 0.56;
    cursor: wait;
}

.site-gate.is-ready .site-gate-enter {
    border-color: rgba(243, 215, 137, 0.58);
    background: rgba(243, 215, 137, 0.08);
}

.site-gate.is-ready .site-gate-enter:hover {
    transform: translateY(-1px);
}

@keyframes siteGateNebula {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to { transform: translate3d(26px, -18px, 0) scale(1.06); }
}

@keyframes siteGateNebulaReverse {
    from { transform: translate3d(0, 0, 0) scale(1.04); }
    to { transform: translate3d(-24px, 16px, 0) scale(1); }
}

@keyframes siteGateStars {
    to { transform: translate3d(-120px, 100px, 0); }
}

@keyframes siteGateStarsReverse {
    to { transform: translate3d(120px, -80px, 0); }
}

@keyframes siteGateTwinkle {
    from { opacity: 0.25; }
    to { opacity: 0.8; }
}

@keyframes siteGateProgressSweep {
    from { transform: translateX(-120%); }
    to { transform: translateX(280%); }
}

@keyframes siteGateProgressComplete {
    from {
        width: 42%;
        transform: translateX(0);
        opacity: 0.76;
    }
    to {
        width: 100%;
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 760px) {
    .site-gate-wall {
        inset: 5% 5% 7%;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 150px 132px 132px 150px;
        gap: 12px;
        opacity: 0.24;
        transform: none;
    }

    .site-gate-tile:nth-child(1) {
        grid-column: 1 / span 2;
    }

    .site-gate-tile:nth-child(2),
    .site-gate-tile:nth-child(3),
    .site-gate-tile:nth-child(4),
    .site-gate-tile:nth-child(5),
    .site-gate-tile:nth-child(6),
    .site-gate-tile:nth-child(7),
    .site-gate-tile:nth-child(8) {
        grid-column: auto;
    }

    .site-gate-tile:nth-child(8) {
        grid-column: 1 / span 2;
    }

    .site-gate-center {
        padding: 0 24px;
    }

    .site-gate-logo {
        width: 116px;
        height: 116px;
    }

    .site-gate-title {
        font-size: 1.08rem;
        letter-spacing: 0.3em;
    }

    .site-gate-subtitle {
        font-size: 0.74rem;
        letter-spacing: 0.22em;
    }

    .site-gate-progress {
        width: min(190px, 58vw);
        margin-top: 18px;
    }

    .site-gate-enter {
        min-width: 132px;
        min-height: 40px;
        margin-top: 20px;
    }
}