.article-page {
  background:
    radial-gradient(circle at 8% 8%, rgba(191, 233, 220, .48), transparent 22rem),
    radial-gradient(circle at 92% 10%, rgba(217, 239, 145, .44), transparent 20rem),
    var(--paper);
}

.article-header {
  position: relative;
  overflow: hidden;
  padding: 34px 0 90px;
  color: #fff;
  background:
    radial-gradient(circle at 18% 20%, rgba(217, 239, 145, .24), transparent 22rem),
    linear-gradient(135deg, #08282f, #123c45 54%, #22656b);
}

.article-nav {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.article-nav > a:last-child {
  color: var(--lime);
  font-weight: 800;
}

.article-hero {
  max-width: 900px;
  padding-top: 70px;
}

.article-hero h1 {
  margin: 0 0 22px;
  font-size: clamp(46px, 7vw, 82px);
  line-height: 1.04;
  letter-spacing: -.055em;
}

.article-hero p {
  max-width: 720px;
  margin: 0;
  color: #d4e2df;
  font-size: 21px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 70px;
  padding: 78px 0 110px;
}

.article-content {
  min-width: 0;
}

.article-content section {
  padding: 0 0 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
}

.article-content h2 {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: clamp(31px, 4vw, 46px);
  line-height: 1.12;
  letter-spacing: -.03em;
}

.article-content h3 {
  margin: 28px 0 8px;
  color: var(--ink);
  font-size: 24px;
}

.article-content p,
.article-content li {
  color: var(--text);
  font-size: 18px;
}

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

.article-content ul,
.article-content ol {
  padding-right: 24px;
}

.note-box {
  margin: 30px 0;
  padding: 24px;
  color: var(--ink);
  background: rgba(191, 233, 220, .45);
  border-right: 5px solid #398273;
  border-radius: 18px;
}

.article-aside {
  position: sticky;
  top: 24px;
  align-self: start;
  display: grid;
  gap: 18px;
}

.toc,
.article-disclaimer {
  padding: 22px;
  background: rgba(255, 253, 250, .82);
  border: 1px solid rgba(18, 60, 69, .08);
  border-radius: 20px;
  box-shadow: 0 14px 50px rgba(14, 55, 62, .08);
}

.toc strong,
.article-disclaimer strong {
  display: block;
  margin-bottom: 12px;
  color: var(--ink);
}

.toc a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
}

.toc a:hover {
  color: var(--ink);
}

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

.article-footer {
  padding: 38px 0;
  background: var(--ink-2);
  color: #c7d7d4;
}

.article-footer .shell {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.article-footer a {
  color: var(--lime);
  font-weight: 800;
}

@media (max-width: 850px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .article-aside {
    position: static;
    order: -1;
  }
}

@media (max-width: 520px) {
  .article-header {
    padding-bottom: 70px;
  }

  .article-nav,
  .article-footer .shell {
    flex-direction: column;
    align-items: flex-start;
  }
}