:root {
    --color-text: #111827;
    --color-muted: #6b7280;
    --color-border: #e5e7eb;
    --color-bg: #ffffff;
    --color-bg-soft: #f8fafc;
    --color-navy: #10233f;
    --color-accent: #1f4d7a;
    --font-base: "Sora", "Helvetica Neue", Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--color-text);
    background: var(--color-bg);
    font-family: var(--font-base);
    line-height: 1.8;
}

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

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

.container {
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
}

.container--narrow {
    width: min(820px, calc(100% - 48px));
}

/* ==============================
  Header
============================== */

.site-header {
    width: 100%;
    min-height: 80px;
    padding: 0 clamp(24px, 5vw, 72px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.96);
}

.site-logo {
    display: flex;
    align-items: center;
}

.site-logo a {
    display: inline-flex;
    align-items: center;
}

.site-logo img {
    display: block;
    width: 180px;
    max-width: 100%;
    height: auto;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 28px;
    font-size: 14px;
}

.site-nav a {
    color: var(--color-muted);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
    color: var(--color-navy);
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    margin: 5px auto;
    background: var(--color-navy);
    border-radius: 999px;
}

.site-main {
    min-height: 60vh;
}

/* ==============================
  Hero
============================== */

.insights-hero,
.archive-hero {
    padding: 88px 0 64px;
    background:
        linear-gradient(135deg, rgba(16, 35, 63, 0.05), rgba(31, 77, 122, 0.02)),
        var(--color-bg);
}

.page-label {
    margin: 0 0 16px;
    color: var(--color-accent);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.insights-hero h1,
.archive-hero h1,
.single-post__header h1 {
    margin: 0;
    color: var(--color-navy);
    font-size: clamp(32px, 5vw, 56px);
    line-height: 1.25;
    letter-spacing: 0.02em;
}

.hero-lead {
    margin: 24px 0 0;
    color: var(--color-muted);
    font-size: 16px;
}

/* ==============================
  Post list
============================== */

.post-list-section {
    padding: 72px 0 96px;
}

.post-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.post-card {
    border: 1px solid var(--color-border);
    border-radius: 20px;
    overflow: hidden;
    background: #fff;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.post-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(16, 35, 63, 0.1);
}

.post-card__link {
    display: block;
    height: 100%;
}

.post-card__image {
    aspect-ratio: 16 / 9;
    background: var(--color-bg-soft);
    overflow: hidden;
}

.post-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-card__body {
    padding: 24px;
}

.post-card__meta,
.single-post__meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
    color: var(--color-muted);
    font-size: 12px;
}

.post-card h2 {
    margin: 0 0 12px;
    color: var(--color-navy);
    font-size: 20px;
    line-height: 1.5;
}

.post-card p {
    margin: 0;
    color: var(--color-muted);
    font-size: 14px;
}

/* ==============================
  Single post
============================== */

.single-post {
    padding: 72px 0 96px;
}

.single-post__header {
    margin-bottom: 40px;
}

.single-post__excerpt {
    margin: 24px 0 0;
    color: var(--color-muted);
    font-size: 17px;
}

.single-post__image {
    margin: 0 0 48px;
    border-radius: 24px;
    overflow: hidden;
    background: var(--color-bg-soft);
}

.single-post__content {
    font-size: 16px;
}

.single-post__content h2 {
    margin-top: 56px;
    margin-bottom: 16px;
    color: var(--color-navy);
    font-size: 28px;
    line-height: 1.45;
}

.single-post__content h3 {
    margin-top: 40px;
    margin-bottom: 12px;
    color: var(--color-navy);
    font-size: 22px;
}

.single-post__content p {
    margin: 0 0 1.4em;
}

.single-post__content ul,
.single-post__content ol {
    padding-left: 1.5em;
    margin-bottom: 1.5em;
}

.single-post__content blockquote {
    margin: 32px 0;
    padding: 20px 24px;
    border-left: 4px solid var(--color-accent);
    background: var(--color-bg-soft);
    color: var(--color-text);
}

.post-navigation {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
    color: var(--color-accent);
    font-weight: 600;
}

.back-to-list {
    margin-top: 32px;
}

.back-to-list a {
    display: inline-flex;
    padding: 12px 18px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-navy);
    font-size: 14px;
}

.pagination {
    margin-top: 48px;
}

/* ==============================
  Footer
============================== */

.site-footer {
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-soft);
}

.site-footer__inner {
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
    padding: 40px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    color: var(--color-muted);
    font-size: 13px;
}

.site-footer__info {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.site-footer__brand {
    margin: 0;
    color: var(--color-navy);
    font-weight: 700;
}

.site-footer__copy {
    margin: 0;
}

.site-footer__links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.site-footer__nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-navy);
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.social-link:hover {
    background: var(--color-navy);
    color: #fff;
    transform: translateY(-2px);
}

.social-link__icon {
    font-size: 15px;
    font-weight: 700;
    line-height: 1;
}

/* ==============================
  Responsive
============================== */

@media (max-width: 900px) {
    .site-header {
        min-height: auto;
        padding: 20px 24px;
        align-items: flex-start;
        flex-direction: column;
    }

    .site-logo img {
        height: 36px;
    }

    .menu-toggle {
        display: none;
    }

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

    .post-grid {
        grid-template-columns: 1fr;
    }

    .site-footer__inner {
        align-items: flex-start;
        flex-direction: column;
    }

    .site-footer__links {
        align-items: flex-start;
        flex-direction: column;
        gap: 18px;
    }
}

@media (max-width: 600px) {
    .container,
    .container--narrow,
    .site-footer__inner {
        width: min(100% - 32px, 1120px);
    }

    .site-header {
        padding: 20px 16px;
    }

    .insights-hero,
    .archive-hero {
        padding: 64px 0 48px;
    }

    .post-list-section,
    .single-post {
        padding: 56px 0 72px;
    }

    .post-navigation {
        flex-direction: column;
    }
}