* {
  box-sizing: border-box;
}

html {
  font-family: Arial, Helvetica, sans-serif;
  color: #07143d;
  background: #f5f7fb;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(34, 93, 255, 0.10), transparent 28%),
    radial-gradient(circle at 88% 8%, rgba(15, 170, 161, 0.11), transparent 24%),
    #f5f7fb;
}

a {
  color: inherit;
}

.site-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.blog-header {
  padding: 24px 0 18px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0;
}

.brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.brand span {
  display: block;
  color: #07143d;
  font-size: 20px;
  line-height: 1;
}

.brand small {
  display: block;
  margin-top: 4px;
  color: #52617d;
  font-size: 12px;
  font-weight: 700;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.ghost-link,
.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.ghost-link {
  border: 1px solid #dbe5f4;
  background: #fff;
  color: #24436f;
}

.primary-link {
  border: 1px solid #225dff;
  background: #225dff;
  color: #fff;
  box-shadow: 0 14px 28px rgba(34, 93, 255, 0.18);
}

.hero {
  padding: 34px 0 24px;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  color: #07143d;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero p {
  max-width: 760px;
  margin: 18px 0 0;
  color: #52617d;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.55;
  font-weight: 700;
}

.article-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  align-items: start;
  padding: 18px 0 54px;
}

.article-card,
.side-card,
.blog-list-card,
.cta-panel {
  border: 1px solid #dbe5f4;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 18px 46px rgba(7, 20, 61, 0.06);
}

.article-card {
  padding: clamp(22px, 4vw, 42px);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  color: #52617d;
  font-size: 13px;
  font-weight: 800;
}

.article-meta span {
  padding: 7px 10px;
  border-radius: 999px;
  background: #f1f5ff;
}

.article-card h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

.article-card h2 {
  margin: 34px 0 12px;
  font-size: clamp(22px, 3vw, 29px);
  line-height: 1.18;
  letter-spacing: 0;
}

.article-card h3 {
  margin: 24px 0 10px;
  font-size: 20px;
  line-height: 1.25;
}

.article-card p,
.article-card li {
  color: #263657;
  font-size: 17px;
  line-height: 1.78;
  font-weight: 500;
}

.article-card p {
  margin: 0 0 16px;
}

.article-card ul,
.article-card ol {
  margin: 12px 0 22px;
  padding-left: 24px;
}

.article-card strong {
  color: #07143d;
}

.side-card {
  position: sticky;
  top: 18px;
  padding: 20px;
}

.side-card h2,
.side-card h3 {
  margin: 0 0 10px;
  font-size: 19px;
}

.side-card p,
.side-card li {
  color: #52617d;
  font-size: 14px;
  line-height: 1.55;
  font-weight: 700;
}

.side-card ul {
  margin: 12px 0 18px;
  padding-left: 19px;
}

.cta-panel {
  margin-top: 32px;
  padding: clamp(22px, 4vw, 34px);
  background: linear-gradient(135deg, #eef6ff 0%, #ffffff 58%, #eefbf9 100%);
}

.cta-panel h2 {
  margin-top: 0;
}

.cta-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.blog-list {
  display: grid;
  gap: 16px;
  padding: 18px 0 58px;
}

.blog-list-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 22px;
  text-decoration: none;
}

.blog-list-card:hover {
  border-color: #b8c9ff;
  transform: translateY(-1px);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.blog-list-card h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.blog-list-card p {
  margin: 0;
  color: #52617d;
  font-size: 15px;
  line-height: 1.55;
  font-weight: 700;
}

.blog-footer {
  border-top: 1px solid #dbe5f4;
  padding: 24px 0 32px;
  color: #52617d;
  font-size: 13px;
  font-weight: 700;
}

@media (max-width: 860px) {
  .site-shell {
    width: min(100% - 22px, 680px);
  }

  .topbar,
  .blog-list-card {
    align-items: flex-start;
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
  }

  .top-actions {
    width: 100%;
    justify-content: stretch;
  }

  .ghost-link,
  .primary-link {
    flex: 1;
  }

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

  .side-card {
    position: static;
  }
}