:root {
  --brand-deep: #002c5f;
  --brand: #0d4d8c;
  --brand-soft: #e7f0ff;
  --cta: #ff7a18;
  --cta-dark: #d9640c;
  --text: #1b2533;
  --muted: #5b6b81;
  --border: #d9e2f2;
  --background: #f5f8fd;
  --card: #ffffff;
  --sidebar: #f0f4ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.65;
  background: var(--background);
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover,
a:focus-visible {
  color: var(--brand-deep);
  text-decoration: underline;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  color: var(--brand-deep);
}

.site-nav {
  display: flex;
  gap: 18px;
  align-items: center;
  flex: 1;
}

.site-nav a {
  color: var(--muted);
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--brand-deep);
}

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  background: var(--cta);
  color: #fff;
  transition: background 0.2s ease, transform 0.2s ease;
  box-shadow: 0 8px 18px rgba(255, 122, 24, 0.22);
}

.site-header__cta:hover,
.site-header__cta:focus-visible {
  background: var(--cta-dark);
  text-decoration: none;
  transform: translateY(-1px);
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.hero {
  margin-top: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #eef4ff 100%);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(13, 77, 140, 0.08), transparent 55%),
    radial-gradient(circle at 80% 30%, rgba(255, 122, 24, 0.12), transparent 60%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  max-width: 640px;
  z-index: 2;
}

.hero__eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand-deep);
  margin: 0 0 12px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 2.8rem;
  line-height: 1.15;
  color: var(--brand-deep);
}

.hero p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero__search {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 12px;
  box-shadow: 0 12px 32px rgba(13, 77, 140, 0.08);
}

.hero__search input[type="search"] {
  flex: 1;
  border: none;
  font-size: 1rem;
  padding: 10px 16px;
  border-radius: 999px;
  outline: none;
}

.hero__search button {
  border: none;
  background: var(--brand-deep);
  color: #fff;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.hero__search button:hover,
.hero__search button:focus-visible {
  background: var(--brand);
  transform: translateY(-1px);
}

.layout {
  margin-top: 48px;
  display: grid;
  grid-template-columns: minmax(0, 2.3fr) minmax(260px, 1fr);
  gap: 32px;
  align-items: start;
}

.feed__header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.feed__header h2 {
  margin: 0;
  font-size: 1.8rem;
  color: var(--brand-deep);
}

.feed__header p {
  margin: 0;
  color: var(--muted);
}

.card-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.post-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border-radius: 24px;
  border: 1px solid rgba(13, 77, 140, 0.08);
  box-shadow: 0 16px 32px rgba(13, 77, 140, 0.08);
  overflow: hidden;
  position: relative;
}

.post-card[hidden] {
  display: none !important;
}

.post-card__image {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--brand-soft);
}

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

.post-card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.post-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(13, 77, 140, 0.12);
  color: var(--brand-deep);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.post-card__title {
  margin: 0;
  font-size: 1.3rem;
  color: var(--text);
}

.post-card__title a {
  color: inherit;
  text-decoration: none;
}

.post-card__title a:hover,
.post-card__title a:focus-visible {
  color: var(--brand-deep);
  text-decoration: underline;
}

.post-card__excerpt {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 4.6em;
}

.post-card__footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--muted);
}

.post-card__author {
  font-weight: 600;
  color: var(--brand-deep);
}

.post-card__readmore {
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.post-card__readmore:hover,
.post-card__readmore:focus-visible {
  color: var(--brand-deep);
  text-decoration: none;
}

.post-card__search-index {
  position: absolute;
  inset: -9999px auto auto -9999px;
  height: 1px;
  width: 1px;
  overflow: hidden;
}

.feed__empty {
  margin-top: 24px;
  padding: 32px;
  border-radius: 20px;
  border: 1px dashed var(--border);
  background: rgba(255, 255, 255, 0.8);
  color: var(--muted);
  text-align: center;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar__card {
  background: var(--card);
  border-radius: 24px;
  padding: 24px;
  border: 1px solid rgba(13, 77, 140, 0.08);
  box-shadow: 0 14px 28px rgba(13, 77, 140, 0.06);
}

.sidebar__card h3 {
  margin: 0 0 12px;
  color: var(--brand-deep);
}

.sidebar__card p {
  margin: 0 0 16px;
  color: var(--muted);
}

.sidebar__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sidebar__filter {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 0.85rem;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sidebar__filter:hover,
.sidebar__filter:focus-visible {
  border-color: var(--brand);
  color: var(--brand-deep);
}

.sidebar__filter.is-active {
  background: var(--brand-deep);
  border-color: var(--brand-deep);
  color: #fff;
  box-shadow: 0 10px 24px rgba(0, 44, 95, 0.25);
}

.sidebar__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-deep);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
}

.sidebar__cta:hover,
.sidebar__cta:focus-visible {
  background: var(--brand);
  text-decoration: none;
}

.footer {
  background: #03142e;
  color: rgba(255, 255, 255, 0.78);
  padding: 64px 24px 32px;
}

.footer a {
  color: rgba(255, 255, 255, 0.88);
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto 32px;
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.footer__logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  display: inline-block;
  margin-bottom: 12px;
}

.footer__social {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  transition: background 0.2s ease;
}

.footer__social a:hover,
.footer__social a:focus-visible {
  background: rgba(255, 255, 255, 0.24);
}

.footer h4 {
  margin: 0 0 16px;
  color: #fff;
  font-size: 1rem;
}

.footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.footer__value {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

.footer__form {
  display: grid;
  gap: 12px;
}

.footer__form input[type="email"] {
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  outline: none;
}

.footer__form button {
  padding: 12px 16px;
  border-radius: 10px;
  border: none;
  background: var(--cta);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

.footer__form button:hover,
.footer__form button:focus-visible {
  background: var(--cta-dark);
}

.footer__bottom {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

.footer__bottom span {
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
}

.article-wrapper {
  max-width: 900px;
  margin: 32px auto 96px;
  padding: 0 24px;
}

.article {
  background: var(--card);
  border-radius: 28px;
  border: 1px solid rgba(13, 77, 140, 0.08);
  box-shadow: 0 18px 40px rgba(13, 77, 140, 0.1);
  padding: 48px;
}

.article h1 {
  margin-top: 0;
  font-size: 2.4rem;
  color: var(--brand-deep);
}

.article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 0.95rem;
  margin: 12px 0 28px;
}

.article__meta .post-tag {
  background: rgba(13, 77, 140, 0.12);
  color: var(--brand-deep);
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.75rem;
}

.article__meta .post-author {
  font-weight: 600;
  color: var(--brand-deep);
}

.article__featured {
  margin: 0 0 32px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(13, 77, 140, 0.08);
}

.article__featured img {
  display: block;
  width: 100%;
  height: auto;
}

.article .prose p {
  margin: 0 0 18px;
  color: var(--text);
  font-size: 1rem;
}

.article .prose ul,
.article .prose ol {
  padding-left: 22px;
  margin: 0 0 18px;
}

.article .prose li {
  margin-bottom: 8px;
}

@media (max-width: 1024px) {
  .hero {
    padding: 40px;
  }

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

  .sidebar {
    order: -1;
  }
}

@media (max-width: 720px) {
  .site-header__inner {
    flex-wrap: wrap;
    gap: 16px;
  }

  .site-nav {
    order: 3;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .site-header__cta {
    order: 2;
  }

  .hero {
    padding: 32px 24px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero__search {
    flex-direction: column;
    align-items: stretch;
    border-radius: 20px;
  }

  .hero__search input[type="search"],
  .hero__search button {
    width: 100%;
    border-radius: 14px;
  }

  .article {
    padding: 32px 24px;
  }
}

@media (max-width: 520px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .post-card__footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}