:root {
    --color-primary: #024ad8;
    --color-primary-deep: #0e3191;
    --color-primary-bright: #296ef9;
    --color-canvas: #ffffff;
    --color-cloud: #f7f7f7;
    --color-fog: #e8e8e8;
    --color-ink: #1a1a1a;
    --color-charcoal: #3d3d3d;
    --color-graphite: #636363;
    --color-steel: #c2c2c2;
    --color-hairline: #e8e8e8;
    --font-family: 'Manrope', Arial, sans-serif;
    --rounded-md: 4px;
    --rounded-lg: 8px;
    --rounded-xl: 16px;
    --shadow-soft: 0 2px 8px rgba(26, 26, 26, 0.08);
    --section-gap: 80px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.38;
    color: var(--color-ink);
    background: var(--color-canvas);
    margin: 0;
}

h1, h2, h3, h4 {
    font-weight: 500;
    line-height: 1.0;
    margin-top: 0;
}

h1 {
    font-size: 2.75rem;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: var(--color-charcoal);
}

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

a:hover {
    color: var(--color-primary-deep);
}

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

.utility-strip {
    background: var(--color-ink);
    color: var(--color-canvas);
    font-size: 14px;
    height: 36px;
    display: flex;
    align-items: center;
}

.utility-strip-muted {
    color: var(--color-steel);
}

.nav-bar-top {
    background: var(--color-canvas);
    height: 64px;
    border-bottom: 1px solid var(--color-hairline);
}

.site-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-ink);
    text-decoration: none;
}

.site-logo:hover {
    color: var(--color-primary);
}

.topnav-links {
    gap: 0.25rem;
}

.nav-link {
    color: var(--color-ink);
    padding: 0.5rem 1rem;
    font-size: 16px;
    text-decoration: none;
    border-bottom: 2px solid transparent;
}

.nav-link:hover {
    color: var(--color-primary);
}

.nav-link.active {
    border-bottom-color: var(--color-primary);
    color: var(--color-primary);
}

.nav-toggle {
    border: none;
    padding: 0.5rem;
}

.nav-toggle-icon {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-ink);
    position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-ink);
    left: 0;
}

.nav-toggle-icon::before {
    top: -7px;
}

.nav-toggle-icon::after {
    top: 7px;
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-nav-link {
    font-size: 18px;
    color: var(--color-ink);
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-hairline);
}

.page-layout {
    display: flex;
    min-height: calc(100vh - 100px);
}

.category-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: var(--color-cloud);
    padding: 1.5rem 1rem;
    border-right: 1px solid var(--color-hairline);
}

.sidebar-section {
    margin-bottom: 1.5rem;
}

.sidebar-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-graphite);
    margin-bottom: 0.75rem;
}

.sidebar-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-link {
    display: block;
    padding: 0.4rem 0.75rem;
    color: var(--color-ink);
    font-size: 14px;
    border-radius: var(--rounded-lg);
}

.sidebar-link:hover {
    background: var(--color-fog);
    color: var(--color-primary);
}

.sidebar-link.active {
    background: var(--color-primary);
    color: var(--color-canvas);
}

.main-content {
    flex: 1;
    min-width: 0;
}

.content-inner {
    max-width: 900px;
    padding: 2rem 1.5rem;
}

.hero-home {
    background: var(--color-cloud);
    padding: var(--section-gap) 0;
    position: relative;
}

.hero-home-inner {
    position: relative;
    max-width: 1366px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.hero-promo-card {
    background: var(--color-canvas);
    border-radius: var(--rounded-xl);
    padding: 2rem;
    box-shadow: var(--shadow-soft);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
    position: relative;
}

.chevron-decoration {
    position: absolute;
    width: 48px;
    height: 120px;
    background: var(--color-primary);
    top: 50%;
    transform: translateY(-50%) skewX(-20deg);
}

.chevron-left {
    left: -24px;
}

.chevron-right {
    right: -24px;
}

.hero-img-wrap {
    border-radius: var(--rounded-xl);
    overflow: hidden;
}

.hero-img {
    width: 100%;
    display: block;
}

.hero-lead {
    font-size: 18px;
    line-height: 1.33;
    color: var(--color-charcoal);
    margin-bottom: 1.5rem;
}

.btn-primary-sm {
    background: var(--color-primary);
    color: var(--color-canvas);
    border: none;
    border-radius: var(--rounded-md);
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.7px;
    text-transform: capitalize;
    height: 44px;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
}

.btn-primary-sm:hover {
    background: var(--color-primary-deep);
    color: var(--color-canvas);
}

.section-cloud {
    background: var(--color-cloud);
    padding: var(--section-gap) 0;
}

.section-white {
    padding: var(--section-gap) 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
}

.card-article-tile {
    display: block;
    background: var(--color-canvas);
    border-radius: var(--rounded-xl);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.card-article-tile:hover {
    box-shadow: 0 4px 16px rgba(26, 26, 26, 0.12);
}

.card-article-img-wrap {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-cloud);
}

.card-article-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-article-body {
    padding: 1rem;
}

.card-article-category {
    font-size: 12px;
    color: var(--color-graphite);
    display: block;
    margin-bottom: 0.25rem;
}

.card-article-title {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-ink);
}

.card-article-desc {
    font-size: 14px;
    color: var(--color-charcoal);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.breadcrumb-nav {
    margin-bottom: 1.5rem;
}

.breadcrumb {
    font-size: 14px;
    margin: 0;
    padding: 0;
    background: none;
}

.breadcrumb-item a {
    color: var(--color-primary);
}

.breadcrumb-item.active {
    color: var(--color-graphite);
}

.article-header {
    margin-bottom: 2rem;
}

.article-meta {
    font-size: 14px;
    color: var(--color-graphite);
    margin-bottom: 0.5rem;
}

.article-layout-grid {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
}

.article-toc {
    position: sticky;
    top: 100px;
    align-self: start;
}

.toc-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-graphite);
    margin-bottom: 0.75rem;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-link {
    display: block;
    padding: 0.35rem 0;
    font-size: 14px;
    color: var(--color-charcoal);
    border-left: 2px solid transparent;
    padding-left: 0.75rem;
}

.toc-link:hover {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.article-section {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-hairline);
}

.article-section:last-child {
    border-bottom: none;
}

.article-figure {
    margin: 1.5rem 0;
    border-radius: var(--rounded-xl);
    overflow: hidden;
}

.article-figure img {
    width: 100%;
    display: block;
}

.figure-credit {
    font-size: 12px;
    color: var(--color-graphite);
    padding: 0.5rem;
    background: var(--color-cloud);
}

.research-note {
    background: var(--color-cloud);
    border-radius: var(--rounded-lg);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    font-size: 14px;
    color: var(--color-charcoal);
    border-left: 3px solid var(--color-primary);
}

.related-content {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-hairline);
}

.related-title {
    margin-bottom: 1.5rem;
}

.related-card {
    display: block;
    background: var(--color-canvas);
    border-radius: var(--rounded-xl);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}

.related-card:hover {
    box-shadow: 0 4px 16px rgba(26, 26, 26, 0.12);
}

.related-card-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.related-card-body {
    padding: 1rem;
}

.related-card-category {
    font-size: 12px;
    color: var(--color-graphite);
}

.related-card-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-ink);
    margin: 0.25rem 0 0;
}

.help-band-dark {
    background: var(--color-ink);
    color: var(--color-canvas);
    padding: 64px 1.5rem;
}

.help-band-title {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.help-band-text {
    font-size: 18px;
    color: var(--color-steel);
    max-width: 600px;
    margin: 0 auto;
}

.footer-dark {
    background: var(--color-ink);
    color: var(--color-canvas);
    padding: 64px 1.5rem 2rem;
}

.footer-col-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--color-steel);
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--color-canvas);
}

.footer-columns {
    margin-bottom: 2rem;
}

.footer-disclaimers {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-disclaimer {
    font-size: 12px;
    line-height: 1.33;
    color: var(--color-steel);
    margin-bottom: 0.75rem;
}

.footer-bottom {
    font-size: 12px;
    color: var(--color-graphite);
}

.legal-content h2 {
    margin-top: 2rem;
}

.legal-content p,
.legal-content li {
    color: var(--color-charcoal);
}

.contact-form .form-label {
    font-weight: 500;
    font-size: 14px;
}

.contact-form .form-control {
    border-radius: var(--rounded-md);
    border: 1px solid var(--color-steel);
    height: 44px;
    padding: 0.5rem 1rem;
}

.contact-form .form-control:focus {
    border-color: var(--color-ink);
    box-shadow: none;
}

.form-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--rounded-lg);
    font-size: 14px;
}

.form-feedback.success {
    background: #e8f4ea;
    color: #1a5c2e;
}

.form-feedback.error {
    background: #fde8e8;
    color: #8b1a1a;
}

.faq-section {
    background: var(--color-fog);
    padding: var(--section-gap) 0;
}

.faq-item {
    background: var(--color-canvas);
    border-radius: var(--rounded-lg);
    margin-bottom: 0.75rem;
    border: 1px solid var(--color-hairline);
}

.faq-item summary {
    padding: 1rem 1.5rem;
    font-weight: 500;
    cursor: pointer;
    list-style: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item[open] summary {
    border-bottom: 1px solid var(--color-hairline);
}

.faq-answer {
    padding: 1rem 1.5rem;
    font-size: 16px;
    color: var(--color-charcoal);
}

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-ink);
    color: var(--color-canvas);
    padding: 1rem 1.5rem;
    z-index: 1050;
    display: none;
}

.cookie-banner.visible {
    display: block;
}

.cookie-banner-inner {
    max-width: 1366px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.cookie-banner-text {
    font-size: 14px;
    flex: 1;
    min-width: 200px;
    color: var(--color-steel);
}

.cookie-banner-actions {
    display: flex;
    gap: 0.75rem;
}

.btn-cookie-accept {
    background: var(--color-primary);
    color: var(--color-canvas);
    border: none;
    border-radius: var(--rounded-md);
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    text-transform: capitalize;
    cursor: pointer;
}

.btn-cookie-accept:hover {
    background: var(--color-primary-deep);
}

@media (max-width: 1023px) {
    .category-sidebar {
        display: none;
    }

    .hero-promo-card {
        grid-template-columns: 1fr;
    }

    .chevron-decoration {
        display: none;
    }

    .article-layout-grid {
        grid-template-columns: 1fr;
    }

    .article-toc {
        position: static;
        background: var(--color-cloud);
        padding: 1rem;
        border-radius: var(--rounded-lg);
        margin-bottom: 2rem;
    }

    :root {
        --section-gap: 48px;
    }

    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 767px) {
    .content-inner {
        padding: 1.5rem 1rem;
    }

    .footer-col {
        margin-bottom: 1.5rem;
    }
}

@media (min-width: 1024px) {
    .container-xl {
        max-width: 1366px;
        margin: 0 auto;
        padding: 0 1.5rem;
    }
}