/* Field Guide is the product identity. Shared behavior and accessibility live in styles.css. */
@layer field-guide {
  body {
    background: var(--paper);
  }

  .site-header, .site-header.is-scrolled {
    position: relative;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    backdrop-filter: none;
    box-shadow: none;
  }
  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto auto;
    min-height: 6.25rem;
    gap: 2.5rem;
  }

  .brand {
    gap: 0.9rem;
  }

  .brand-mark {
    width: 3.25rem;
    height: 3.25rem;
  }

  .brand-copy {
    display: grid;
    gap: 0.2rem;
  }

  .brand-copy strong {
    font: 500 1.65rem/1.1 var(--display);
    letter-spacing: -0.02em;
  }

  .brand-copy span {
    font: 0.72rem/1.4 var(--sans);
    letter-spacing: 0.04em;
  }

  .primary-nav {
    gap: 2rem;
  }

  .primary-nav a {
    color: var(--ink);
    font-size: 0.88rem;
    font-weight: 500;
    padding-block: 0.75rem;
  }

  .header-action {
    border-color: var(--line-strong);
    background: transparent;
    color: var(--ink);
    font-weight: 600;
  }

  .hero {
    padding: 4.5rem 0 3.5rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 1.5rem;
    align-items: center;
  }

  .hero h1 {
    max-width: 15ch;
    font-size: clamp(3.2rem, 6vw, 5.55rem);
    line-height: 1.04;
    letter-spacing: -0.035em;
  }

  .hero-context {
    color: var(--blue);
    font-size: 0.73rem;
    letter-spacing: 0.17em;
    text-transform: uppercase;
    margin-bottom: 1.4rem;
  }

  .hero-intro {
    max-width: 42ch;
    margin-top: 1.4rem;
    font-size: 1.08rem;
    line-height: 1.7;
  }

  .hero-actions {
    margin-top: 1.8rem;
    gap: 0.85rem;
  }

  .button {
    gap: 0.75rem;
    font-weight: 500;
    font-size: 1rem;
    min-height: 3.2rem;
    padding: 0.75rem 1.2rem;
    border-radius: 3px;
  }

  .button-primary {
    background: var(--coral-deep);
    border-color: var(--coral-deep);
    color: white;
  }

  .button-secondary {
    background: transparent;
    border-color: var(--line-strong);
  }

  .hero .command-dock {
    gap: 0.7rem; margin-top: 1.8rem; padding: 0.85rem;
    background: var(--paper-soft); border: 1px solid var(--line); color: var(--ink); border-radius: 3px;
  }
  .hero .command-dock > div {
    display: grid;
    gap: 0.35rem;
  }

  .hero .command-label {
    font-size: 0.65rem;
    color: var(--muted);
    letter-spacing: 0.04em;
    font-weight: 500;
    text-transform: none;
  }

  .hero .command-dock code {
    font-size: 0.68rem;
    line-height: 1.7;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .hero .copy-button {
    flex: 0 0 auto;
    background: transparent;
    border-color: var(--line-strong);
    color: var(--ink);
  }

  .proof-row {
    margin-top: 1.4rem;
    border-top: none;
  }

  .proof-row > div {
    flex-direction: row-reverse;
    justify-content: flex-end;
    align-items: baseline;
    gap: 0.4rem;
    padding: 0.25rem 0.65rem 0.25rem 0;
  }

  .proof-row > div + div {
    padding-left: 0.65rem;
  }

  .proof-row dd {
    font-size: 1.1rem;
  }

  .proof-row dt {
    font-weight: 400;
    font-size: 0.71rem;
    text-transform: none;
  }

  .field-guide-art {
    position: relative;
    min-width: 0;
  }

  .field-guide-art img {
    width: 100%;
    height: auto;
  }

  .field-guide-art figcaption {
    margin-top: 0.5rem;
    text-align: center;
    font: 500 1.2rem/1.4 var(--display);
    color: var(--muted);
  }

  .section {
    padding-block: clamp(4rem, 7vw, 6.5rem);
    scroll-margin-top: 2rem;
  }

  h2 {
    font-size: clamp(2.5rem, 4vw, 4rem);
    line-height: 1.12;
  }

  .eyebrow {
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.17em;
  }

  .eyebrow::before {
    width: 1.25rem;
    height: 1px;
  }

  .signal-strip {
    background: transparent;
    border-color: var(--line);
  }

  .signal-track {
    width: auto;
    flex-wrap: wrap;
    gap: 0.6rem 1.5rem;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-transform: none;
    color: var(--muted);
  }

  .signal-track i {
    width: 0.2rem;
  }

  .library {
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }

  .library-heading {
    gap: 2.5rem;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    align-items: center;
  }

  .library-heading h2 {
    max-width: 20ch;
  }

  .library-heading > p {
    font-size: 1rem;
    max-width: 47ch;
  }

  .filter-bar {
    margin: 2.5rem 0 0.5rem;
    gap: 0.25rem;
  }

  .filter-bar button {
    border-color: transparent;
    border-radius: 3px;
    font-weight: 500;
    font-size: 0.8rem;
  }

  .filter-bar button[aria-pressed="true"] {
    background: var(--paper-soft);
    color: var(--ink);
    border-color: var(--line);
  }

  .filter-bar button[aria-pressed="true"] span {
    background: var(--paper);
    color: var(--ink);
  }

  .skill-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 3rem;
    border: 0;
    background: transparent;
  }

  .skill-card, .skill-card-feature {
    display: grid; grid-template-columns: 2.5rem minmax(0, 1fr); grid-template-rows: auto auto auto auto;
    grid-column: auto; gap: 0.4rem 0.75rem; min-height: 0; padding: 1.75rem 0;
    border-top: 1px solid var(--line); background: transparent; color: var(--ink); overflow: visible;
  }
  .skill-card::after {
    content: none;
  }

  .card-topline {
    display: contents;
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0;
    text-transform: none;
    color: var(--muted);
  }

  .card-topline span:first-child {
    display: none;
  }

  .card-topline span:last-child {
    grid-column: 1;
    grid-row: 1;
    padding-top: 0.25rem;
    font-family: var(--display);
  }

  .skill-card h3 {
    max-width: none;
    grid-column: 2;
    grid-row: 1;
    margin: 0;
    padding: 0;
    font-size: 1.75rem;
  }

  .skill-card p, .skill-card-feature p {
    grid-column: 2;
    margin: 0;
    max-width: 45ch;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.65;
  }

  .skill-card ul {
    grid-column: 2;
    margin: 0.25rem 0 0;
    gap: 0.3rem 1rem;
  }

  .skill-card li {
    padding: 0;
    border: 0;
    border-radius: 0;
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--muted);
  }

  .skill-card > a {
    grid-column: 2;
    justify-self: start;
    margin-top: 0.4rem;
    color: var(--blue);
    font-size: 0.8rem;
    font-weight: 500;
    text-decoration: none;
  }

  .skill-card:hover, .skill-card-feature:hover {
    transform: none;
    box-shadow: none;
    background: transparent;
  }

  .skill-card > a:hover, .skill-card-feature > a:hover {
    color: var(--blue);
    text-decoration: underline;
  }

  .capabilities-heading, .section-heading {
    gap: 2.5rem;
  }

  .capabilities-heading h2 {
    max-width: 20ch;
  }

  .capabilities-heading > p {
    font-size: 1rem;
  }

  .capability-explorer {
    margin-top: 2.5rem;
    border-color: var(--line);
    min-height: 35rem;
  }

  .capability-tabs {
    background: var(--paper);
    border-color: var(--line);
  }

  .capability-tabs button {
    min-height: 4.65rem;
    padding: 0.85rem 1.15rem;
  }

  .capability-tabs button[aria-selected="true"] {
    background: var(--paper-soft);
    color: var(--ink);
    box-shadow: inset 3px 0 var(--coral);
  }

  .capability-tabs button[aria-selected="true"] small {
    color: var(--muted);
  }

  .capability-tabs button[aria-selected="true"] .capability-index {
    color: var(--blue);
  }

  .capability-tabs small {
    font-weight: 500;
    font-size: 0.65rem;
  }

  .capability-tabs strong {
    font-weight: 500;
  }

  .capability-index {
    font-size: 1.4rem;
  }

  .capability-stage {
    background: var(--blue-surface);
  }

  .review-verdict {
    background: var(--panel);
  }

  .review-contract {
    border: 0;
    background: transparent;
    gap: 1.5rem;
    margin-top: 2rem;
  }

  .review-contract li {
    min-height: 0;
    border-top: 1px solid var(--line);
    padding: 1.25rem 0;
    background: transparent;
  }

  .review-contract strong {
    margin-top: 1rem;
    font-weight: 600;
  }

  .capability-cta {
    margin-top: 1.5rem;
    background: var(--paper-soft);
    color: var(--ink);
    border-block: 1px solid var(--line);
  }

  .capability-cta .eyebrow, .capability-cta .text-link {
    color: var(--blue);
  }

  .capability-command {
    background: var(--panel);
  }

  .journey-step {
    border-color: var(--line);
  }

  .step-number {
    font-size: 2rem;
  }

  .step-label {
    font-weight: 500;
  }

  .flagship {
    background: var(--blue-surface);
  }

  .route-cloud {
    border-color: rgb(255 255 255 / 30%);
    background: transparent;
    box-shadow: none;
    transform: none;
  }

  .route {
    border-radius: 2px;
  }

  .landscape-hero-copy h1 {
    max-width: 18ch;
    font-size: clamp(3rem, 5.5vw, 5.4rem);
    line-height: 1.08;
  }

  .landscape-hero-copy > p:last-child {
    font-size: 1rem;
    line-height: 1.8;
  }

  .verdict-key {
    background: var(--paper-soft);
    border-color: var(--line);
    border-radius: 2px;
  }

  .verdict-key h2 {
    font: 500 1.8rem/1.2 var(--display);
  }

  .comparison-section-heading h2 {
    max-width: 20ch;
  }

  .comparison-cards {
    gap: 0;
    margin-top: 2.5rem;
  }

  .comparison-card {
    padding: 2.5rem 0;
    border: 0;
    border-top: 1px solid var(--line-strong);
    background: transparent;
    border-radius: 0;
  }

  .comparison-card h3 {
    font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  }

  .comparison-kicker {
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.12em;
  }

  .comparison-summary {
    max-width: 70ch;
    margin-top: 1.5rem;
    font-size: 1rem;
    color: var(--muted);
  }

  .comparison-facts {
    gap: 1.5rem 2.5rem;
    border: 0;
    margin-top: 2rem;
  }

  .comparison-facts > div {
    min-height: 0;
    padding: 1rem 0 0;
    border: 0;
    border-top: 1px solid var(--line);
  }

  .comparison-facts dt {
    font-size: 0.68rem;
    font-weight: 500;
  }

  .comparison-facts dd {
    font-size: 0.9rem;
    line-height: 1.75;
  }

  .comparison-card > footer {
    font-weight: 500;
  }

  .fit-badge {
    border-radius: 2px;
    font-weight: 500;
    font-size: 0.65rem;
  }

  .method-grid {
    border: 0;
    background: transparent;
    gap: 1.5rem;
    margin-top: 2.5rem;
  }

  .method-grid li {
    border-top: 1px solid var(--line);
    background: transparent;
    padding: 1.25rem 0;
    min-height: 0;
  }

  .method-grid h3 {
    margin-top: 1.25rem;
  }

  .comparison-list, .compatibility {
    border-color: var(--line);
  }

  .compatibility {
    background: var(--paper-soft);
    color: var(--ink);
  }

  .landscape-hero {
    padding-top: 3.5rem;
    background: var(--paper);
  }

  .landscape-hero-copy, .verdict-key {
    min-width: 0;
  }

  .landscape-hero-copy h1 {
    overflow-wrap: anywhere;
  }

  .verdict-key h2 {
    overflow-wrap: anywhere;
  }

  .landscape-teaser, .instructions {
    background: var(--paper-soft);
  }


  .principles-intro {
    top: 2rem;
  }

  .about-mark {
    max-width: 9rem;
    justify-self: center;
  }

  .site-footer .brand-copy strong {
    font-size: 1.6rem;
  }

  .site-footer .brand-copy span {
    color: rgb(255 255 255 / 70%);
  }


  @media (max-width: 1000px) {
    .header-inner {
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 0.5rem 1rem;
      min-height: 0;
      padding-block: 1rem 0.5rem;
    }

    .primary-nav {
      grid-column: 1 / -1;
      grid-row: 2;
      justify-content: flex-start;
      gap: 2rem;
      padding: 0;
    }

    .hero {
      padding-top: 3rem;
    }

    .hero-grid {
      grid-template-columns: 1fr;
      gap: 2rem;
    }

    .hero-copy {
      max-width: 40rem;
    }

    .hero h1 {
      font-size: clamp(3.5rem, 8vw, 5.5rem);
    }

    .field-guide-art {
      max-width: 42rem;
      justify-self: center;
    }

    .field-guide-art figcaption {
      margin-top: 0;
    }

    .library-heading {
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }

    .capabilities-heading, .section-heading {
      grid-template-columns: 1fr;
    }

    .capability-explorer {
      grid-template-columns: 1fr;
      min-height: 0;
    }

    .capability-tablist {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .capability-stage {
      min-height: 32rem;
    }


    .landscape-hero-grid {
      grid-template-columns: minmax(0, 1fr);
    }

  }
  @media (max-width: 680px) {
    .brand {
      gap: 0.55rem;
    }

    .brand-mark {
      width: 2.4rem;
      height: 2.4rem;
    }

    .brand-copy strong {
      font-size: 1.23rem;
    }

    .brand-copy span {
      font-size: 0.6rem;
    }

    .header-action {
      min-height: 2.75rem;
      padding-inline: 0.6rem;
      font-size: 0.72rem;
    }

    .primary-nav {
      gap: 1.5rem;
      justify-content: space-between;
    }

    .primary-nav a {
      font-size: 0.8rem;
    }

    .hero {
      padding-block: 2.5rem 2rem;
    }

    .hero h1 {
      font-size: clamp(3.15rem, 10.5vw, 4.5rem);
    }

    .hero-intro {
      font-size: 1rem;
    }

    .hero-actions {
      flex-direction: row;
      align-items: stretch;
      gap: 0.65rem;
    }

    .hero-actions .button {
      width: auto;
      flex: 1 1 auto;
      padding-inline: 0.8rem;
      font-size: 0.9rem;
    }

    .hero .command-dock {
      flex-direction: row;
      align-items: center;
    }

    .hero .command-dock > div {
      display: grid;
    }

    .proof-row > div, .proof-row > div + div {
      flex-direction: column-reverse;
      align-items: flex-start;
    }

    .proof-row dt {
      margin-top: 0.2rem;
    }

    .field-guide-art figcaption {
      font-size: 1rem;
    }

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

    .skill-card {
      padding-block: 1.5rem;
    }

    .skill-card h3 {
      font-size: 1.6rem;
    }

    .filter-bar {
      gap: 0.25rem;
    }

    .capability-stage {
      min-height: 0;
    }

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

    .review-contract p {
      font-size: 0.8rem;
    }


    .about-mark {
      max-width: 5rem;
      justify-self: start;
    }

  }
}