* {
    box-sizing: border-box;
}

:root {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    color: #243447;
    background: #f7f9fc;
    line-height: 1.65;
}

body {
    margin: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1120px, calc(100% - 40px));
    margin-inline: auto;
}

.site-header {
    background: #fff;
    border-bottom: 1px solid #e5eaf0;
}

.header-inner,
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-inner {
    min-height: 76px;
}

.brand {
    font-size: 1.65rem;
    font-weight: 800;
    color: #173b58;
}

.brand span {
    color: #ed9d48;
}

nav {
    display: flex;
    gap: 28px;
    font-size: .95rem;
    font-weight: 600;
}

nav a:hover,
.read-link:hover {
    color: #d47d27;
}

.hero {
    margin-top: 38px;
    padding: 90px 45px;
    border-radius: 20px;
    background: #173b58;
    color: #fff;
}

.hero h1 {
    max-width: 720px;
    font-size: clamp(2.3rem, 6vw, 4.3rem);
    line-height: 1.12;
    margin: 12px 0;
}

.hero > p:not(.eyebrow) {
    max-width: 620px;
    color: #e1eaf1;
    font-size: 1.1rem;
}

.eyebrow {
    color: #d48a39;
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: .13em;
}

.button {
    display: inline-block;
    margin-top: 18px;
    padding: 12px 22px;
    border-radius: 8px;
    background: #edaa59;
    color: #173b58;
    font-weight: 750;
}

.section {
    padding: 46px 0 12px;
}

.section-heading h2,
.page-heading h1 {
    color: #173b58;
}

.category-grid,
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.category-card,
.article-card,
.empty-state,
.article-detail {
    background: #fff;
    border: 1px solid #e6ebf1;
    border-radius: 13px;
    padding: 25px;
}

.category-card {
    font-weight: 750;
    color: #173b58;
}

.category-card span {
    display: block;
    margin-top: 10px;
    color: #d48a39;
    font-size: .85rem;
}

.article-card h3 {
    color: #173b58;
    line-height: 1.35;
}

.article-card > p:not(.eyebrow) {
    color: #657486;
}

.read-link,
.back-link {
    color: #b76c21;
    font-weight: 700;
}

.page-heading {
    padding: 55px 0 15px;
}

.page-heading h1 {
    font-size: 2.6rem;
    margin: 5px 0;
}

.empty-state {
    margin: 20px 0;
    text-align: center;
    padding: 45px 25px;
}

.article-detail {
    max-width: 850px;
    margin: 45px auto;
    padding: clamp(24px, 5vw, 60px);
}

.article-detail h1 {
    color: #173b58;
    font-size: clamp(2rem, 5vw, 3.2rem);
    line-height: 1.2;
}

.article-summary {
    font-size: 1.2rem;
    color: #657486;
}

.article-date {
    color: #8491a0;
    font-size: .9rem;
}

.article-body {
    margin-top: 35px;
    font-size: 1.08rem;
    line-height: 1.9;
    overflow-wrap: anywhere;
}

.site-footer {
    margin-top: 65px;
    background: #173b58;
    color: #e1eaf1;
    padding: 30px 0;
}

.footer-inner {
    flex-wrap: wrap;
    gap: 12px;
}

.footer-inner p {
    margin: 0;
    font-size: .88rem;
}

@media (max-width: 640px) {
    .header-inner {
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        padding: 15px 0;
        gap: 12px;
    }

    nav {
        gap: 18px;
        flex-wrap: wrap;
    }

    .hero {
        padding: 55px 25px;
    }

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