:root {
  --brand-dark: #2b2b2b;
  --brand-graphite: #171717;
  --brand-surface: #f7f5f2;
  --brand-border: #e4ded7;
  --accent: #d97a32;
  --accent-strong: #b85f1f;
  --muted: #6b7280;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--brand-surface);
  color: var(--brand-dark);
  font-family: Inter, Manrope, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

.article-header {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--brand-border);
  background: rgba(255, 255, 255, 0.86);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.article-brand,
.article-back,
.article-index-card {
  color: inherit;
  text-decoration: none;
}

.article-brand strong {
  color: var(--brand-dark);
  font-size: 18px;
  line-height: 1;
}

.article-brand span {
  color: var(--accent);
}

.article-back {
  min-height: 38px;
  display: inline-grid;
  place-items: center;
  padding: 0 14px;
  border: 1px solid var(--brand-border);
  border-radius: 8px;
  background: #ffffff;
  font-size: 14px;
  font-weight: 700;
}

.article-back:hover,
.article-index-card:hover {
  border-color: rgba(217, 122, 50, 0.58);
}

.article-shell {
  width: min(100% - 40px, 920px);
  margin: 0 auto;
  padding: clamp(36px, 6vw, 72px) 0;
}

.article-content {
  display: grid;
  gap: 18px;
}

.article-kicker {
  margin: 0;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.article-content h1,
.article-content h2,
.article-content h3 {
  max-width: 820px;
  margin: 0;
  color: var(--brand-graphite);
  line-height: 1.18;
}

.article-content h1 {
  font-size: clamp(34px, 6vw, 56px);
}

.article-content h2 {
  margin-top: 24px;
  font-size: clamp(24px, 4vw, 34px);
}

.article-content h3 {
  margin-top: 12px;
  font-size: 22px;
}

.article-content p,
.article-content ul {
  max-width: 760px;
  margin: 0;
}

.article-content ul {
  display: grid;
  gap: 8px;
  padding-left: 22px;
}

.article-content code {
  padding: 2px 6px;
  border: 1px solid var(--brand-border);
  border-radius: 6px;
  background: #ffffff;
  color: var(--brand-graphite);
  font-size: 0.9em;
}

.article-content figure {
  margin: 14px 0 22px;
}

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

.article-content figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.article-state {
  color: var(--muted);
}

.article-index-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.article-index-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--brand-border);
}

.article-index-card:last-child {
  border-bottom: 1px solid var(--brand-border);
}

.article-index-card span {
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 900;
}

.article-index-card strong {
  color: var(--brand-graphite);
  font-size: 17px;
}

@media (max-width: 640px) {
  .article-header {
    min-height: 64px;
    padding: 0 18px;
  }

  .article-shell {
    width: min(100% - 28px, 920px);
    padding: 30px 0 48px;
  }

  .article-index-card {
    grid-template-columns: 32px minmax(0, 1fr);
  }
}