:root {
    color-scheme: light;
    --page: #f4f9fc;
    --surface: #ffffff;
    --surface-alt: #e8f4f8;
    --text: #2e4d63;
    --heading: #1b5a78;
    --accent: #147c8d;
    --accent-strong: #0e6f80;
    --line: #bdd8e2;
    --focus: #cc4f2f;
    --max: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--page);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.7;
}

img {
    max-width: 100%;
    height: auto;
}

.shell {
    width: min(calc(100% - 40px), var(--max));
    margin-inline: auto;
}

.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    min-height: 78px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--heading);
    text-decoration: none;
    font-weight: 750;
    white-space: nowrap;
}

.logo-mark {
    display: inline-grid;
    place-items: center;
    min-width: 58px;
    min-height: 38px;
    padding: 4px 8px;
    border: 2px solid var(--accent);
    border-radius: 6px;
    letter-spacing: 0.08em;
    color: var(--accent-strong);
}

.logo-name {
    font-size: 15px;
}

.main-nav ul,
.side-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav ul {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 6px 18px;
}

.main-nav a,
.side-nav a,
.site-footer a {
    color: var(--heading);
    text-decoration: none;
    font-weight: 650;
}

.main-nav a {
    display: inline-block;
    padding: 9px 0;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a:active {
    color: var(--accent-strong);
    border-bottom-color: var(--accent);
}

.hero {
    background: var(--surface-alt);
    border-bottom: 1px solid var(--line);
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 64px;
    align-items: center;
    padding-block: 64px;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--accent-strong);
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 22px;
    color: var(--heading);
    font-size: 40px;
    line-height: 1.12;
    letter-spacing: -0.025em;
}

h2 {
    margin: 0 0 18px;
    color: var(--heading);
    font-size: 28px;
    line-height: 1.22;
    letter-spacing: -0.015em;
}

h3 {
    margin: 28px 0 12px;
    color: var(--heading);
    font-size: 20px;
    line-height: 1.3;
}

p {
    margin: 0 0 18px;
    font-size: 16px;
}

.lead {
    max-width: 800px;
    margin-bottom: 0;
    font-size: 16px;
    line-height: 1.72;
}

.signal-panel {
    display: grid;
    gap: 10px;
    padding: 26px;
    background: var(--surface);
    border-left: 4px solid var(--accent);
    border-top: 1px solid var(--line);
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.signal-panel span,
.signal-panel strong {
    display: block;
}

.signal-panel span {
    color: #52748a;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.signal-panel strong {
    color: var(--heading);
    font-size: 20px;
}

.content-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 64px;
    align-items: start;
    padding-block: 58px 74px;
}

.article {
    min-width: 0;
}

.content-section {
    padding: 0 0 34px;
    margin: 0 0 34px;
    border-bottom: 1px solid var(--line);
}

.content-section:last-child {
    margin-bottom: 0;
    border-bottom: 0;
}

.side-nav {
    position: sticky;
    top: 24px;
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.side-nav h2 {
    font-size: 28px;
}

.side-nav li + li {
    border-top: 1px solid #d6e7ed;
}

.side-nav a {
    display: block;
    padding: 11px 2px;
}

.side-nav a:hover,
.side-nav a:active,
.site-footer a:hover,
.site-footer a:active {
    color: var(--accent-strong);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.site-footer {
    background: #dceef4;
    border-top: 1px solid var(--line);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding-block: 28px;
}

.footer-inner p {
    margin: 0;
    color: #4a7187;
}

a:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 4px;
    border-radius: 3px;
}

@media (max-width: 940px) {
    .header-inner {
        align-items: flex-start;
        flex-direction: column;
        padding-block: 18px;
    }

    .main-nav ul {
        justify-content: flex-start;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 30px;
        padding-block: 48px;
    }

    .signal-panel {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        align-items: center;
    }

    .content-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .side-nav {
        position: static;
    }
}

@media (max-width: 620px) {
    .shell {
        width: min(calc(100% - 28px), var(--max));
    }

    .logo-name {
        white-space: normal;
    }

    .main-nav ul {
        gap: 2px 14px;
    }

    .hero-grid {
        padding-block: 38px;
    }

    h1 {
        font-size: 40px;
        overflow-wrap: anywhere;
    }

    h2 {
        font-size: 28px;
        overflow-wrap: anywhere;
    }

    .signal-panel {
        grid-template-columns: 1fr 1fr;
    }

    .content-wrap {
        padding-block: 42px 56px;
    }

    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
    }
}