:root {
  --c-bg: #fafaf7;
  --c-surface: #ffffff;
  --c-text: #1a1a17;
  --c-text-muted: #6b6b63;
  --c-border: rgba(26, 26, 23, 0.08);
  --c-border-strong: rgba(26, 26, 23, 0.15);
  --c-accent: var(--page-accent, #0f6e56);
  --c-accent-soft: var(--page-soft, #e1f5ee);
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "DM Sans", system-ui, sans-serif;
  --max-w: 1200px;
  --article-w: 760px;
  --radius: 14px;
  --radius-lg: 24px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 250, 247, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
}

.nav-inner,
.footer-grid,
.footer-bottom,
.hero-inner,
.article-layout,
.related-section,
.cta-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.nav-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.nav-logo-mark {
  width: 36px;
  height: 36px;
  display: block;
  object-fit: contain;
  padding: 2px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  background: #fff;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  border-radius: 12px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-text);
  margin: 4px auto;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--c-text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--c-text);
}

.nav-cta {
  background: var(--c-accent);
  color: #fff !important;
  padding: 0.8rem 1.25rem;
  border-radius: 14px;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--c-accent) 20%, transparent);
  outline-offset: 3px;
}

.hero {
  padding: 4.5rem 0 2.5rem;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent);
  text-decoration: none;
  font-weight: 600;
}

.hero-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 380px);
  gap: 2rem;
  align-items: end;
}

.eyebrow {
  display: inline-block;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: var(--c-accent-soft);
  color: var(--c-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 1rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 5vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 12ch;
}

.hero-intro {
  max-width: 48rem;
  font-size: 1.18rem;
  color: var(--c-text-muted);
}

.meta-card,
.summary-card,
.article-body,
.related-card,
.cta-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(26, 26, 23, 0.04);
}

.meta-card {
  padding: 1.2rem 1.3rem;
}

.hero-side {
  display: grid;
  gap: 1rem;
}

.article-hero-image {
  margin: 0;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  background: var(--c-accent-soft);
  box-shadow: 0 16px 40px rgba(26, 26, 23, 0.08);
}

.article-hero-image img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  padding: 0.75rem;
}

.meta-kicker {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--c-text-muted);
  font-size: 0.88rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.2rem;
  font-size: 0.95rem;
}

.meta-row span {
  color: var(--c-text-muted);
}

.meta-row strong {
  color: var(--c-text);
  font-weight: 700;
}

.article-layout {
  display: grid;
  grid-template-columns: 270px minmax(0, var(--article-w));
  gap: 2rem;
  align-items: start;
  padding-bottom: 4.5rem;
}

.summary-card {
  position: sticky;
  top: 6.5rem;
  padding: 1.35rem;
}

.summary-card h2,
.article-body h2,
.related-section h2,
.cta-card h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.summary-card p,
.summary-card li {
  color: var(--c-text-muted);
  font-size: 0.96rem;
}

.summary-list,
.checklist,
.related-list,
.article-body ul,
.article-body ol {
  margin: 0;
  padding-left: 1.15rem;
}

.summary-list li,
.checklist li,
.article-body li {
  margin-bottom: 0.7rem;
}

.article-body {
  padding: 2rem;
}

.article-body > *:first-child {
  margin-top: 0;
}

.article-body p,
.article-body ul,
.article-body ol,
.article-body blockquote,
.article-body .callout,
.article-body .steps-card {
  margin: 1rem 0 1.2rem;
}

.article-body h2 {
  margin-top: 2.5rem;
}

.article-body h3 {
  margin: 1.8rem 0 0.6rem;
  font-size: 1.12rem;
  line-height: 1.35;
}

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

.article-body p,
.article-body li,
.article-body blockquote {
  color: #2d2d29;
}

.article-body ul,
.article-body ol {
  padding-left: 1.35rem;
}

.article-body a {
  color: var(--c-accent);
}

.callout,
.steps-card {
  padding: 1.3rem 1.4rem;
  border-radius: 18px;
  border: 1px solid var(--c-border);
  background: color-mix(in srgb, var(--c-accent-soft) 50%, white);
}

.callout p:last-child,
.steps-card p:last-child {
  margin-bottom: 0;
}

.steps-card ol {
  margin-top: 0.8rem;
}

.mini-label {
  display: inline-block;
  margin-bottom: 0.65rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent);
}

blockquote {
  padding: 1.15rem 1.25rem;
  border-left: 3px solid var(--c-accent);
  background: rgba(26, 26, 23, 0.02);
  border-radius: 0 16px 16px 0;
}

.related-section {
  padding-bottom: 4.5rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.related-card {
  display: block;
  padding: 1.4rem;
  text-decoration: none;
}

.related-card:hover,
.related-card:focus-visible {
  border-color: var(--c-border-strong);
  transform: translateY(-2px);
}

.related-card .tag {
  display: inline-block;
  margin-bottom: 0.85rem;
  color: var(--c-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.related-card h3 {
  margin: 0 0 0.6rem;
  font-size: 1.28rem;
  line-height: 1.2;
}

.related-card p {
  margin: 0;
  color: var(--c-text-muted);
}

.cta-wrap {
  padding-bottom: 4.5rem;
}

.cta-card {
  padding: 2rem;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--c-accent-soft) 75%, white), #fff);
}

.cta-card p {
  max-width: 44rem;
  color: var(--c-text-muted);
}

.cta-card a {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.9rem 1.25rem;
  border-radius: 14px;
  background: var(--c-accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}

footer {
  border-top: 1px solid var(--c-border);
  padding: 2.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr;
  gap: 1.5rem;
}

.footer-brand p,
.footer-col a,
.footer-bottom {
  color: var(--c-text-muted);
}

.footer-brand p {
  max-width: 28rem;
  margin-top: 1rem;
}

.footer-col h4 {
  margin: 0 0 0.9rem;
  font-size: 0.95rem;
}

.footer-col a {
  display: block;
  margin-bottom: 0.55rem;
  text-decoration: none;
}

.social-links {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.social-links a {
  color: var(--c-text-muted);
  font-weight: 700;
  text-decoration: none;
}

.social-links a:hover,
.social-links a:focus-visible {
  color: var(--c-accent);
}

.footer-bottom {
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.92rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .article-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .summary-card {
    position: static;
  }

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

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.75rem);
    z-index: 20;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.75rem;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: 18px;
    box-shadow: 0 20px 45px rgba(26, 26, 23, 0.08);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    display: block;
    padding: 0.8rem 0.9rem;
    border-radius: 12px;
  }

  .nav-cta {
    text-align: center;
  }

  .hero {
    padding: 2.25rem 0 1.5rem;
  }

  .hero-grid,
  .hero-side {
    gap: 1rem;
  }

  .hero h1 {
    max-width: 15ch;
    font-size: clamp(2.2rem, 12vw, 3.2rem);
    line-height: 1.03;
    letter-spacing: 0;
  }

  .hero-intro {
    font-size: 1.06rem;
  }

  .article-hero-image {
    aspect-ratio: 4 / 3;
  }

  .meta-card,
  .summary-card {
    padding: 1rem;
  }

  .article-body {
    order: 1;
  }

  .summary-card {
    order: 2;
  }

  .article-body,
  .cta-card {
    padding: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}