@layer reset, frame, components, responsive;

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    overflow-x: clip;
  }

  img {
    display: block;
    max-width: 100%;
    height: auto;
  }

  a {
    text-underline-offset: 0.2em;
  }
}

@layer frame {
  .site-header,
  .topic-nav,
  .page-footer {
    padding-inline: max(1.25rem, calc((100vw - 78rem) / 2));
  }

  .site-header {
    display: flex;
    min-height: 5.5rem;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
  }

  .identity {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
  }

  .identity-mark {
    display: grid;
    width: 2.7rem;
    height: 2.7rem;
    place-items: center;
  }

  .identity-copy {
    display: grid;
    gap: 0.15rem;
  }

  .header-note {
    max-width: 19rem;
    text-align: right;
  }

  .topic-nav {
    position: relative;
    z-index: 4;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding-block: 0.7rem;
  }

  .topic-nav a {
    display: inline-flex;
    min-height: 2.75rem;
    align-items: center;
    padding: 0.55rem 0.9rem;
    text-decoration: none;
  }

  main {
    display: block;
  }

  .hero {
    display: grid;
    min-height: min(46rem, calc(100svh - 8.5rem));
    grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr);
    align-items: stretch;
  }

  .hero-copy {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(3.5rem, 7vw, 8.5rem) max(1.25rem, calc((100vw - 78rem) / 2));
    padding-right: clamp(2rem, 7vw, 7rem);
  }

  .hero-art {
    position: relative;
    min-height: 34rem;
    overflow: hidden;
  }

  .hero-art img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .hero-caption {
    position: absolute;
    right: 1.2rem;
    bottom: 1.2rem;
    left: 1.2rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 1rem;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 2rem;
  }

  .hero-actions a,
  .text-link {
    display: inline-flex;
    min-height: 3rem;
    align-items: center;
  }

  .hero-actions a {
    padding: 0.7rem 1rem;
    text-decoration: none;
  }

  .signal-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0;
    padding: 0 max(1.25rem, calc((100vw - 78rem) / 2));
  }

  .signal {
    padding: 1.4rem 1.25rem;
  }

  .reading-shell {
    display: grid;
    width: min(78rem, calc(100% - 2.5rem));
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: clamp(2rem, 7vw, 7rem);
    margin-inline: auto;
    padding-block: clamp(4.5rem, 9vw, 9rem);
  }

  .contents-rail {
    position: sticky;
    top: 1rem;
    align-self: start;
  }

  .contents-rail ol {
    display: grid;
    gap: 0.55rem;
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
  }

  .contents-rail a {
    display: block;
    padding-block: 0.65rem;
    text-decoration: none;
  }

  .guide-flow {
    min-width: 0;
  }

  .guide-section {
    display: grid;
    grid-template-columns: minmax(0, 12rem) minmax(0, 1fr);
    gap: clamp(1.5rem, 5vw, 4rem);
    padding-block: clamp(3rem, 7vw, 6rem);
  }

  .section-kicker {
    margin: 0.25rem 0 0;
  }

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

  .section-body > :last-child {
    margin-bottom: 0;
  }

  .plain-card,
  .warning-card,
  .answer-card,
  .source-card,
  .price-card,
  .myth-card {
    padding: clamp(1.35rem, 3vw, 2.25rem);
  }

  .plain-card,
  .warning-card {
    margin-block: 2rem;
  }

  .definition-pair {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-block: 2rem;
  }

  .comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin-top: 2rem;
  }

  .comparison-card {
    min-height: 15rem;
    padding: 1.4rem;
  }

  .comparison-card dl {
    display: grid;
    gap: 0.8rem;
    margin-bottom: 0;
  }

  .comparison-card div {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: 0.75rem;
  }

  .comparison-card dt,
  .comparison-card dd {
    margin: 0;
  }

  .art-break {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.72fr);
    align-items: center;
    gap: 2rem;
    margin-block: 2.5rem;
    padding: 1rem;
  }

  .art-break img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
  }

  .question-band {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
    margin-top: 3rem;
    padding: clamp(1.5rem, 4vw, 3rem);
  }

  .question-band a {
    display: inline-flex;
    min-height: 3rem;
    align-items: center;
    white-space: nowrap;
  }

  .page-hero {
    display: grid;
    width: min(78rem, calc(100% - 2.5rem));
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.62fr);
    align-items: end;
    gap: clamp(2rem, 6vw, 6rem);
    margin-inline: auto;
    padding-block: clamp(4rem, 10vw, 8rem);
  }

  .page-hero-art {
    align-self: stretch;
    min-height: 22rem;
  }

  .page-hero-art img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .page-content {
    width: min(66rem, calc(100% - 2.5rem));
    margin-inline: auto;
    padding-block: 1rem clamp(5rem, 10vw, 9rem);
  }

  .question-cluster {
    display: grid;
    grid-template-columns: minmax(0, 0.46fr) minmax(0, 1fr);
    gap: clamp(1.5rem, 5vw, 4rem);
    padding-block: clamp(2.5rem, 6vw, 5rem);
  }

  .answer-list {
    display: grid;
    gap: 0.85rem;
  }

  .answer-card h3,
  .myth-card h3,
  .price-card h3 {
    margin-top: 0;
  }

  .answer-card > :last-child,
  .myth-card > :last-child,
  .price-card > :last-child {
    margin-bottom: 0;
  }

  .amount-questions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
    margin-block: 1.5rem;
    padding: 0;
    list-style: none;
  }

  .amount-questions li {
    padding: 0.8rem 1rem;
  }

  .price-grid,
  .myth-grid,
  .source-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-block: 2rem 4rem;
  }

  .source-card a {
    display: inline-block;
    margin-top: 0.4rem;
    padding-block: 0.6rem;
  }

  .page-footer {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 2rem;
    padding-block: 2.5rem 3rem;
  }

  .footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.25rem 1.25rem;
  }

  .footer-links a {
    display: inline-block;
    padding-block: 0.65rem;
  }
}

@layer components {
  .eyebrow,
  .section-kicker,
  .card-label,
  .source-kind {
    display: block;
  }

  .lede {
    max-width: 42rem;
  }

  .mini-rule {
    width: 4.5rem;
    height: 0.18rem;
    margin-block: 1.4rem;
  }

  .quiet-note {
    max-width: 44rem;
  }

  .source-list {
    margin: 1rem 0 0;
    padding-left: 1.25rem;
  }

  .source-list li + li {
    margin-top: 0.7rem;
  }
}

@layer responsive {
  @media (max-width: 840px) {
    .hero,
    .page-hero {
      grid-template-columns: 1fr;
    }

    .hero-copy {
      padding-right: max(1.25rem, calc((100vw - 78rem) / 2));
    }

    .hero-art {
      min-height: 23rem;
    }

    .page-hero-art {
      min-height: 18rem;
    }

    .reading-shell {
      grid-template-columns: 1fr;
    }

    .contents-rail {
      position: static;
    }

    .contents-rail ol {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .guide-section,
    .question-cluster {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 620px) {
    .site-header {
      min-height: auto;
      align-items: flex-start;
      padding-block: 1rem;
    }

    .header-note {
      display: none;
    }

    .topic-nav {
      gap: 0.2rem;
      padding-block: 0.45rem;
    }

    .topic-nav a {
      flex: 1 1 calc(50% - 0.2rem);
      justify-content: center;
      text-align: center;
    }

    .hero {
      min-height: auto;
    }

    .hero-copy {
      padding-block: 4rem;
    }

    .hero-art {
      min-height: 19rem;
    }

    .hero-caption {
      display: block;
    }

    .signal-row,
    .comparison-grid,
    .definition-pair,
    .amount-questions,
    .price-grid,
    .myth-grid,
    .source-grid,
    .art-break,
    .question-band,
    .page-footer {
      grid-template-columns: 1fr;
    }

    .signal {
      padding-inline: 0;
    }

    .contents-rail ol {
      grid-template-columns: 1fr;
    }

    .guide-section {
      padding-block: 3.25rem;
    }

    .comparison-card {
      min-height: 0;
    }

    .question-band a {
      white-space: normal;
    }

    .page-footer,
    .footer-links {
      justify-content: flex-start;
    }
  }

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