.surface-page {
    --surface-accent-rgb: 142, 240, 210;
    position: relative;
    isolation: isolate;
    padding: clamp(70px, 8vw, 118px) 0 clamp(74px, 9vw, 132px);
}

.surface-page--blog {
    --surface-accent-rgb: 122, 169, 255;
}

.surface-page--about {
    --surface-accent-rgb: 168, 148, 255;
}

.surface-page--lab {
    --surface-accent-rgb: 126, 222, 255;
}

.surface-page--tools {
    --surface-accent-rgb: 142, 240, 210;
}

.surface-page--arena {
    --surface-accent-rgb: 153, 145, 255;
}

.surface-page::before {
    position: absolute;
    top: -180px;
    left: 50%;
    z-index: -2;
    width: 100vw;
    height: 760px;
    background:
        radial-gradient(circle at 72% 34%, rgba(var(--surface-accent-rgb), 0.11), transparent 28%),
        radial-gradient(circle at 31% 16%, rgba(255, 255, 255, 0.035), transparent 22%);
    content: "";
    transform: translateX(-50%);
    pointer-events: none;
}

.surface-page__hero {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
    min-height: min(700px, calc(100svh - 150px));
    gap: clamp(54px, 8vw, 132px);
    align-items: center;
}

.surface-page__copy {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.surface-page__kicker {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 9px;
    font-weight: 740;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.surface-page__index {
    display: grid;
    width: 38px;
    height: 38px;
    place-items: center;
    border: 1px solid rgba(var(--surface-accent-rgb), 0.3);
    border-radius: 50%;
    color: rgb(var(--surface-accent-rgb));
    background: rgba(var(--surface-accent-rgb), 0.045);
    box-shadow: 0 0 28px rgba(var(--surface-accent-rgb), 0.06);
}

.surface-page h1 {
    max-width: 10ch;
    margin: 24px 0 0;
    font-size: clamp(4.6rem, 9vw, 9.6rem);
    font-weight: 770;
    letter-spacing: -0.078em;
    line-height: 0.86;
}

.surface-page__title-mark {
    color: rgb(var(--surface-accent-rgb));
    text-shadow: 0 0 30px rgba(var(--surface-accent-rgb), 0.24);
}

.surface-page__lead {
    max-width: 35ch;
    margin: 32px 0 0;
    color: var(--muted-strong);
    font-size: clamp(1.08rem, 1.45vw, 1.34rem);
    font-weight: 560;
    line-height: 1.5;
}

.surface-page__detail {
    max-width: 58ch;
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.72;
}

.surface-page__meta {
    width: fit-content;
    margin: 25px 0 0;
    padding: 9px 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    color: rgba(var(--surface-accent-rgb), 0.88);
    background: rgba(var(--surface-accent-rgb), 0.035);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 9px;
    letter-spacing: 0.05em;
}

.surface-page__back {
    margin-top: 34px;
}

.surface-page__visual {
    position: relative;
    isolation: isolate;
    width: min(100%, 620px);
    aspect-ratio: 1.06;
    justify-self: end;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.105);
    border-radius: clamp(28px, 3vw, 42px);
    background:
        radial-gradient(circle at 57% 48%, rgba(var(--surface-accent-rgb), 0.14), transparent 17%),
        radial-gradient(circle at 70% 28%, rgba(122, 169, 255, 0.095), transparent 31%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.052), rgba(255, 255, 255, 0.012));
    box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.055);
}

.surface-page__visual::before,
.surface-page__visual::after {
    position: absolute;
    content: "";
    pointer-events: none;
}

.surface-page__visual::before {
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.035), transparent 34%, rgba(var(--surface-accent-rgb), 0.025));
}

.surface-page__visual::after {
    top: 22px;
    right: 22px;
    width: 62px;
    height: 62px;
    border-top: 1px solid rgba(var(--surface-accent-rgb), 0.28);
    border-right: 1px solid rgba(var(--surface-accent-rgb), 0.28);
}

.surface-page__visual-grid {
    position: absolute;
    inset: 18% -14% -22%;
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(ellipse at 53% 40%, black 10%, transparent 72%);
    opacity: 0.62;
    transform: perspective(640px) rotateX(58deg) rotateZ(-7deg);
}

.surface-page__visual-orbit,
.surface-page__visual-core {
    position: absolute;
    top: 50%;
    left: 54%;
    border-radius: 50%;
}

.surface-page__visual-orbit {
    border: 1px solid rgba(255, 255, 255, 0.12);
    transform: translate(-50%, -50%);
}

.surface-page__visual-orbit--outer {
    width: 58%;
    aspect-ratio: 1;
    border-color: rgba(var(--surface-accent-rgb), 0.2);
    animation: surface-orbit 25s linear infinite;
}

.surface-page__visual-orbit--outer::before,
.surface-page__visual-orbit--inner::before {
    position: absolute;
    top: -4px;
    left: 50%;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgb(var(--surface-accent-rgb));
    box-shadow: 0 0 20px rgba(var(--surface-accent-rgb), 0.7);
    content: "";
}

.surface-page__visual-orbit--inner {
    width: 36%;
    aspect-ratio: 1;
    border-color: rgba(122, 169, 255, 0.22);
    animation: surface-orbit 17s linear infinite reverse;
}

.surface-page__visual-core {
    display: grid;
    width: 18%;
    aspect-ratio: 1;
    place-items: center;
    border: 1px solid rgba(var(--surface-accent-rgb), 0.36);
    color: rgb(var(--surface-accent-rgb));
    background:
        radial-gradient(circle at 34% 28%, rgba(255, 255, 255, 0.12), transparent 42%),
        rgba(var(--surface-accent-rgb), 0.1);
    box-shadow: 0 0 80px rgba(var(--surface-accent-rgb), 0.12), inset 0 0 38px rgba(var(--surface-accent-rgb), 0.06);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 11px;
    font-weight: 760;
    transform: translate(-50%, -50%);
    animation: surface-breathe 6.5s ease-in-out infinite;
}

.surface-page__visual-title {
    position: absolute;
    top: 25%;
    left: 9%;
    color: rgba(247, 249, 251, 0.045);
    font-size: clamp(4rem, 7vw, 7rem);
    font-weight: 780;
    letter-spacing: -0.07em;
    line-height: 1;
    transform: rotate(-90deg) translateX(-50%);
    transform-origin: left top;
    white-space: nowrap;
}

.surface-page__route,
.surface-page__route-state {
    position: absolute;
    bottom: 24px;
    z-index: 2;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 9px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.surface-page__route {
    left: 24px;
    color: var(--muted);
}

.surface-page__route-state {
    right: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted-strong);
}

.surface-page__route-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgb(var(--surface-accent-rgb));
    box-shadow: 0 0 16px rgba(var(--surface-accent-rgb), 0.6);
}

.surface-page__state {
    display: grid;
    grid-template-columns: minmax(150px, 0.28fr) minmax(0, 0.72fr);
    gap: 36px;
    align-items: start;
    margin-top: clamp(42px, 6vw, 82px);
    padding-top: 28px;
    border-top: 1px solid var(--line);
}

.surface-page__state > p:last-child {
    max-width: 66ch;
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.72;
}

@keyframes surface-orbit {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

@keyframes surface-breathe {
    0%,
    100% {
        transform: translate(-50%, -50%) scale(0.96);
    }

    50% {
        transform: translate(-50%, -50%) scale(1.05);
    }
}

@media (max-width: 980px) {
    .surface-page__hero {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 62px;
    }

    .surface-page__copy {
        max-width: 760px;
    }

    .surface-page__visual {
        width: min(100%, 760px);
        justify-self: stretch;
        aspect-ratio: 1.45;
    }

    .surface-page__visual-title {
        font-size: clamp(4rem, 12vw, 8rem);
    }
}

@media (max-width: 660px) {
    .surface-page {
        padding: 58px 0 78px;
    }

    .surface-page h1 {
        margin-top: 20px;
        font-size: clamp(4rem, 22vw, 6.5rem);
    }

    .surface-page__lead {
        margin-top: 24px;
    }

    .surface-page__meta {
        max-width: 100%;
        white-space: normal;
    }

    .surface-page__visual {
        aspect-ratio: 0.96;
        border-radius: 26px;
    }

    .surface-page__visual-orbit--outer {
        width: 72%;
    }

    .surface-page__visual-orbit--inner {
        width: 46%;
    }

    .surface-page__visual-core {
        width: 22%;
    }

    .surface-page__visual-title {
        top: 19%;
        font-size: clamp(3.8rem, 19vw, 6rem);
    }

    .surface-page__state {
        grid-template-columns: 1fr;
        gap: 14px;
    }
}