/* ===== Sections ===== */
.section {
  padding: var(--sp-16) 0;
}

.section--bg {
  background: var(--color-surface);
}

/* ===== Hero ===== */
.hero {
  padding: var(--sp-20) 0;
  text-align: center;
  background: var(--color-primary);
}

.hero__eyebrow {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--sp-4);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--sp-6);
  line-height: 1.2;
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: rgba(255, 255, 255, 0.80);
  max-width: 640px;
  margin: 0 auto var(--sp-8);
  line-height: 1.8;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  justify-content: center;
}

/* ===== Grid ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
}

/* ===== Guidebook CTA ===== */
.guidebook-cta {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--sp-12);
  display: flex;
  gap: var(--sp-8);
  align-items: center;
}

.guidebook-cta__img {
  width: 160px;
  flex-shrink: 0;
  border-radius: var(--radius);
}

.guidebook-cta__body {
  flex: 1;
}

.guidebook-cta__title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: var(--sp-4);
  color: var(--color-primary);
  line-height: 1.4;
}

.guidebook-cta__lead {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  margin-bottom: var(--sp-4);
  line-height: 1.8;
}

.guidebook-cta__list {
  list-style: disc;
  padding-left: var(--sp-6);
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  margin-bottom: var(--sp-6);
}

.guidebook-cta__list li {
  margin-bottom: 0.25rem;
}

/* ===== About section ===== */
.about-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: center;
}

.about-section__img {
  border-radius: var(--radius);
  width: 100%;
}

.about-section__body .section-title {
  margin-bottom: var(--sp-4);
}

.about-section__body p {
  color: var(--color-text-sub);
  line-height: 1.8;
  margin-bottom: var(--sp-6);
}

/* ===== Article layout ===== */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--sp-12);
  align-items: flex-start;
}

.article-sidebar {
  position: sticky;
  top: 80px;
}

/* ===== Related articles ===== */
.related-articles {
  padding-top: var(--sp-12);
  margin-top: var(--sp-12);
  border-top: 1px solid var(--color-border);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .article-sidebar {
    position: static;
  }

  .guidebook-cta {
    flex-direction: column;
    padding: var(--sp-8);
  }

  .guidebook-cta__img {
    width: 120px;
  }

  .about-section {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: flex !important;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #FAFAF8;
    border-bottom: 1px solid #E8DFD0;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--sp-6);
    gap: var(--sp-4);
    box-shadow: 0 4px 16px rgba(22, 32, 46, 0.10);
    z-index: 99;
  }

  .site-nav.is-open {
    display: flex;
  }
}

@media (max-width: 600px) {
  .grid-3,
  .grid-4,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .section {
    padding: var(--sp-12) 0;
  }

  .hero {
    padding: var(--sp-12) 0;
  }

  .hero__title {
    font-size: 2rem;
  }

  .comparison-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}