:root {
  --text: #111318;
  --muted: #5d6675;
  --line: rgba(17, 19, 24, 0.1);
  --blue: #2563eb;
  --soft: #f5f7fb;
}

* {
  box-sizing: border-box;
}

html {
  background: #ffffff;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  background: linear-gradient(180deg, #ffffff 0%, var(--soft) 100%);
  max-width: 100%;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.blog-topbar {
  position: sticky;
  top: 12px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  width: min(1120px, calc(100% - 32px));
  margin: 12px auto 0;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
}

.brand img {
  display: block;
  border-radius: 10px;
}

.blog-topbar nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.blog-topbar nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 13px;
  border-radius: 999px;
  color: #20242c;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
}

.blog-topbar .primary-link {
  color: #ffffff;
  background: #111318;
  white-space: nowrap;
}

.mobile-nav-menu {
  display: none;
  position: relative;
}

.mobile-nav-menu summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  cursor: pointer;
  list-style: none;
}

.mobile-nav-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-nav-menu summary span {
  position: absolute;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: #111318;
}

.mobile-nav-menu summary span:nth-child(1) {
  transform: translateY(-5px);
}

.mobile-nav-menu summary span:nth-child(3) {
  transform: translateY(5px);
}

.mobile-nav-menu[open] summary span:nth-child(1) {
  transform: rotate(45deg);
}

.mobile-nav-menu[open] summary span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-menu[open] summary span:nth-child(3) {
  transform: rotate(-45deg);
}

.mobile-nav-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  display: grid;
  min-width: 148px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.14);
}

.blog-topbar .mobile-nav-panel a {
  justify-content: flex-start;
  min-height: 40px;
  padding: 0 12px;
  border-radius: 6px;
}

.blog-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(72px, 10vw, 132px) 0 96px;
  min-width: 0;
}

.blog-hero {
  max-width: 840px;
}

.kicker {
  margin: 0 0 16px;
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.blog-hero h1 {
  margin: 0;
  max-width: 720px;
  font-size: 4.6rem;
  line-height: 1;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
}

.button.primary {
  color: #ffffff;
  background: #111318;
}

.button.secondary {
  border: 1px solid var(--line);
  background: #ffffff;
}

.blog-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-top: clamp(72px, 11vw, 128px);
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.blog-preview-grid article {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.blog-preview-grid h2 {
  margin: 0;
  font-size: 1.08rem;
  letter-spacing: -0.03em;
}

.blog-preview-grid p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.article-shell {
  width: min(980px, calc(100% - 32px));
  padding-top: 72px;
}

.blog-article {
  max-width: 760px;
  margin: 0 auto;
  min-width: 0;
}

.blog-article h1 {
  margin: 0;
  font-size: 2.72rem;
  line-height: 1.1;
  letter-spacing: 0;
}

.article-dek {
  margin-top: 16px;
  color: #20242c;
  font-size: 1.18rem;
  line-height: 1.5;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.blog-article h2 {
  margin: 56px 0 14px;
  font-size: 1.68rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.blog-article h3 {
  margin: 34px 0 10px;
  font-size: 1.14rem;
  line-height: 1.35;
  letter-spacing: 0;
}

.blog-article p,
.blog-article li {
  font-size: 1.02rem;
}

.blog-article p {
  margin: 18px 0 0;
}

.blog-article ul,
.blog-article ol {
  margin: 18px 0 0;
  padding-left: 24px;
}

.blog-article li + li {
  margin-top: 7px;
}

.blog-article blockquote {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 4px solid var(--blue);
  background: #ffffff;
}

.blog-article blockquote p {
  margin: 0;
}

.article-visual {
  margin: 34px 0 0;
  max-width: 100%;
  overflow: hidden;
}

.article-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.article-visual figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.portrait-visual {
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.article-cta {
  margin: 42px 0 0;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: #ffffff;
  max-width: 100%;
}

.article-cta h2 {
  margin: 0;
  font-size: 1.32rem;
}

.article-cta p {
  margin-top: 12px;
}

.strong-cta {
  border-color: rgba(17, 19, 24, 0.14);
  background: #111318;
  color: #ffffff;
}

.strong-cta p {
  color: rgba(255, 255, 255, 0.78);
}

.strong-cta .button.secondary {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.32);
  background: transparent;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.checklist li::marker {
  color: var(--blue);
}

@media (max-width: 720px) {
  .blog-topbar {
    align-items: flex-start;
  }

  .blog-topbar nav {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 6px;
  }

  .blog-topbar .primary-link {
    min-height: 40px;
    max-width: 132px;
    padding: 0 13px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .blog-topbar nav > a:not(.primary-link) {
    display: none;
  }

  .mobile-nav-menu {
    display: inline-flex;
  }

  .blog-hero h1 {
    max-width: 680px;
    font-size: 2.7rem;
  }

  .blog-preview-grid {
    grid-template-columns: 1fr;
  }

  .blog-article h1 {
    font-size: 2rem;
    line-height: 1.12;
  }

  .blog-article h2 {
    font-size: 1.42rem;
  }

  .article-dek {
    font-size: 1.05rem;
  }

  .blog-article p,
  .blog-article li {
    font-size: 1rem;
  }

  .article-shell {
    padding-top: 48px;
  }
}