:root {
    --canvas: #ffffff;
    --cloud: #f7f7f7;
    --fog: #e8e8e8;
    --ink: #1a1a1a;
    --charcoal: #3d3d3d;
    --graphite: #636363;
    --primary: #024ad8;
    --primary-deep: #0e3191;
    --steel: #c2c2c2;
    --soft-blue: #c9e0fc;
    --shadow: 0 2px 8px rgba(26, 26, 26, 0.08);
    --radius-card: 16px;
    --radius-control: 4px;
    --container: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--canvas);
    color: var(--ink);
    font-family: Inter, Manrope, Arial, sans-serif;
    line-height: 1.55;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
}

.container {
    width: min(calc(100% - 32px), var(--container));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: 72px;
    padding: 12px clamp(16px, 4vw, 40px);
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--fog);
    backdrop-filter: blur(12px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border-radius: var(--radius-card);
    background: var(--primary);
    color: #ffffff;
    font-weight: 700;
}

.brand strong,
.brand small {
    display: block;
}

.brand small {
    color: var(--graphite);
    font-size: 12px;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.primary-nav a {
    min-height: 44px;
    padding: 12px 14px;
    border-radius: 999px;
    color: var(--charcoal);
    font-size: 14px;
    text-decoration: none;
}

.primary-nav a.active,
.primary-nav a:focus-visible {
    background: var(--ink);
    color: #ffffff;
    outline: none;
}

.menu-toggle {
    display: none;
    min-height: 44px;
    border: 1px solid var(--steel);
    border-radius: var(--radius-control);
    background: var(--canvas);
    color: var(--ink);
    font: inherit;
    padding: 10px 14px;
}

.home-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    width: min(calc(100% - 32px), 1366px);
    margin: 28px auto 0;
    padding: clamp(24px, 5vw, 48px);
    border-radius: var(--radius-card);
    background: linear-gradient(135deg, var(--cloud), #ffffff);
    overflow: hidden;
}

.hero-copy {
    align-self: center;
}

.section-kicker {
    margin: 0 0 10px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    max-width: 900px;
    margin-bottom: 20px;
    font-size: clamp(36px, 7vw, 72px);
    font-weight: 500;
    line-height: 1;
    letter-spacing: -0.03em;
}

h2 {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 500;
    line-height: 1.08;
    letter-spacing: -0.02em;
}

h3 {
    font-size: 20px;
    line-height: 1.25;
}

.lead {
    max-width: 760px;
    color: var(--charcoal);
    font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.button-primary,
.button-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 12px 24px;
    border-radius: var(--radius-control);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-decoration: none;
    text-transform: uppercase;
}

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

.button-outline {
    border: 1px solid var(--primary);
    color: var(--primary);
}

.hero-image {
    position: relative;
    min-height: 280px;
    margin: 0;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.hero-image img {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
}

.hero-image figcaption {
    position: absolute;
    right: 14px;
    bottom: 14px;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.88);
    color: var(--charcoal);
    font-size: 12px;
}

.portal-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 80px 0;
}

.section-heading {
    max-width: 760px;
    margin-bottom: 10px;
}

.portal-card,
.related-card,
.article-card,
.toc,
.faq-block details {
    border: 1px solid var(--fog);
    border-radius: var(--radius-card);
    background: var(--canvas);
    box-shadow: var(--shadow);
}

.portal-card,
.related-card {
    padding: 24px;
    text-decoration: none;
}

.portal-card span,
.related-card span {
    display: block;
    margin-bottom: 10px;
    color: var(--ink);
    font-size: 20px;
    font-weight: 700;
}

.portal-card p,
.related-card p,
.section-heading p,
.article-card p,
.site-footer p {
    color: var(--charcoal);
}

.split-band {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    align-items: center;
    padding: 64px clamp(16px, 5vw, 48px);
    background: var(--ink);
    color: #ffffff;
}

.split-band p {
    max-width: 720px;
    color: #ffffff;
}

.split-band img {
    width: 100%;
    max-height: 420px;
    border-radius: var(--radius-card);
    object-fit: cover;
}

.faq-block {
    padding: 80px 0;
}

.faq-block details {
    margin-top: 14px;
    padding: 18px 22px;
}

.faq-block summary {
    min-height: 44px;
    cursor: pointer;
    font-weight: 700;
}

.faq-block details p {
    color: var(--charcoal);
}

.page-hero {
    background: var(--cloud);
    padding: 48px 0 64px;
}

.page-hero.compact h1 {
    font-size: clamp(34px, 5vw, 56px);
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
    color: var(--graphite);
    font-size: 14px;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
}

.content-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 48px 0;
}

.toc {
    align-self: start;
    padding: 20px;
}

.toc strong {
    display: block;
    margin-bottom: 12px;
}

.toc a {
    display: block;
    min-height: 44px;
    padding: 10px 0;
    color: var(--primary);
    text-decoration: none;
}

.article-card {
    padding: clamp(24px, 5vw, 48px);
}

.article-card section + section {
    margin-top: 42px;
    padding-top: 42px;
    border-top: 1px solid var(--fog);
}

.related {
    padding: 24px 0 80px;
}

.related-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.site-footer {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 48px clamp(16px, 5vw, 48px);
    background: var(--ink);
    color: #ffffff;
}

.site-footer p {
    max-width: 620px;
    color: #e8e8e8;
}

.site-footer nav {
    display: grid;
    gap: 10px;
}

.site-footer a {
    min-height: 34px;
    color: #ffffff;
    text-decoration: none;
}

@media (min-width: 760px) {
    .home-hero {
        grid-template-columns: 1.05fr 0.95fr;
    }

    .portal-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-heading {
        grid-column: 1 / -1;
    }

    .split-band {
        grid-template-columns: 0.9fr 1.1fr;
    }

    .related-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .site-footer {
        grid-template-columns: 1.5fr 1fr;
    }
}

@media (min-width: 1024px) {
    .portal-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .content-layout {
        grid-template-columns: 280px minmax(0, 1fr);
    }

    .toc {
        position: sticky;
        top: 96px;
    }
}

@media (max-width: 900px) {
    .menu-toggle {
        display: inline-flex;
        align-items: center;
    }

    .primary-nav {
        position: absolute;
        top: 72px;
        right: 16px;
        left: 16px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        border: 1px solid var(--fog);
        border-radius: var(--radius-card);
        background: var(--canvas);
        box-shadow: var(--shadow);
    }

    .primary-nav.open {
        display: flex;
    }

    .primary-nav a {
        border-radius: var(--radius-control);
    }
}