:root {
    --bg: #f8f7f3;
    --panel: #ffffff;
    --soft: #f0eee7;
    --text: #24241f;
    --muted: #69685f;
    --line: rgba(36,36,31,.12);
    --max: 1080px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.65;
}

a {
    color: inherit;
}

.shell {
    width: min(
        calc(100% - 36px),
        var(--max)
    );
    margin: 0 auto;
}

.topbar {
    background: var(--panel);
    border-bottom: 1px solid var(--line);
}

.topbar-inner {
    min-height: 66px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.brand {
    font-weight: 900;
    text-decoration: none;
}

.top-call {
    color: var(--muted);
    font-weight: 700;
    text-decoration: none;
}

.hero {
    padding: 72px 0 54px;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--muted);
    font-size: .86rem;
    margin-bottom: 28px;
}

.breadcrumb a {
    text-decoration: none;
}

.intent {
    color: #77735e;
    font-size: .72rem;
    font-weight: 900;
    letter-spacing: .14em;
    text-transform: uppercase;
}

h1 {
    max-width: 850px;
    margin: 11px 0 18px;
    font-size: clamp(
        2.45rem,
        6vw,
        5rem
    );
    line-height: 1;
    letter-spacing: -.045em;
}

.lead {
    max-width: 760px;
    font-size: clamp(
        1.05rem,
        2vw,
        1.26rem
    );
    color: #4f4e47;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}

.button {
    padding: 13px 17px;
    border: 1px solid var(--line);
    background: var(--panel);
    border-radius: 11px;
    text-decoration: none;
    font-weight: 800;
}

.button.primary {
    background: var(--text);
    color: #fff;
}

.facts {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--panel);
}

.fact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}

.fact {
    padding: 28px;
    min-height: 125px;
    border-right: 1px solid var(--line);
}

.fact:last-child {
    border-right: 0;
}

.fact span {
    display: block;
    color: var(--muted);
    font-size: .69rem;
    font-weight: 900;
    letter-spacing: .12em;
    margin-bottom: 8px;
}

.content {
    padding: 68px 0;
}

.article-shell {
    max-width: 820px;
}

.content-block {
    padding: 30px 0;
    border-bottom: 1px solid var(--line);
}

.content-block:first-child {
    padding-top: 0;
}

.content-block h2,
.cluster h2,
.accuracy h2 {
    margin: 0 0 14px;
    letter-spacing: -.025em;
    font-size: clamp(
        1.45rem,
        3vw,
        2.05rem
    );
}

.content-block p,
.accuracy p {
    color: #525149;
}

.cluster {
    padding: 64px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--soft);
}

.cluster h2 {
    margin-top: 8px;
}

.cluster-grid {
    margin-top: 24px;
    display: grid;
    grid-template-columns:
        repeat(
            auto-fit,
            minmax(170px, 1fr)
        );
    gap: 10px;
}

.cluster-card {
    min-height: 100px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 17px;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.accuracy {
    padding: 60px 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

footer {
    padding: 28px 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: .85rem;
}

@media (max-width: 760px) {
    .fact-grid {
        grid-template-columns: 1fr;
    }

    .fact {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .fact:last-child {
        border-bottom: 0;
    }
}

@media (max-width: 520px) {
    .topbar-inner,
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 15px 0;
    }

    .hero {
        padding-top: 46px;
    }
}