/* ============================================================
   NW Agentic — Architecture page styles
   nwagentic.ai
   ============================================================
   Long-form trust page. Lots of dense content; use generous
   whitespace and clear section rhythm.

   Depends on: tokens.css, base.css, partials.css, pages/tier.css
   (reuses tier-section-head and faq-list).

   See DESIGN.md §5.5.
   ============================================================ */

@layer components {

  /* Hero */
  .arch-hero {
    background: var(--navy-deep);
    color: var(--text-on-dark);
    padding-block: 9rem 6rem;
    position: relative;
    overflow: hidden;
  }
  .arch-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
      radial-gradient(900px 500px at 100% 0%, rgba(37, 99, 235, 0.18), transparent 60%),
      radial-gradient(700px 500px at 0% 100%, rgba(245, 158, 11, 0.12), transparent 60%);
    pointer-events: none;
  }
  .arch-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 880px;
  }
  .arch-hero__chip {
    display: inline-block;
    font-size: var(--fs-eyebrow);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--tr-eyebrow);
    text-transform: uppercase;
    color: var(--blue-bright);
    background: rgba(96, 165, 250, 0.12);
    border: 1px solid rgba(96, 165, 250, 0.3);
    padding: 0.4em 1em;
    border-radius: var(--radius-pill);
    margin-block-end: var(--space-6);
  }
  .arch-hero h1 {
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    font-weight: var(--fw-extrabold);
    line-height: var(--lh-display);
    letter-spacing: var(--tr-display);
    color: var(--text-on-dark);
    margin-block-end: var(--space-6);
    text-wrap: balance;
  }
  .arch-hero h1 em,
  .arch-hero h1 .accent {
    color: var(--blue-bright);
    font-style: normal;
  }
  .arch-hero__sub {
    font-size: var(--fs-body-lg);
    color: var(--text-on-dark-soft);
    line-height: var(--lh-body);
    max-width: 640px;
  }

  /* Spectrum diagram (the signature) */
  .spectrum-section {
    padding-block: var(--section-y-desktop);
    background: var(--bg-subtle);
  }
  .spectrum-diagram {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-12);
    overflow: hidden;
  }
  @media (max-width: 767px) {
    .spectrum-diagram { padding: var(--space-6); }
  }
  .spectrum-diagram svg {
    width: 100%;
    height: auto;
    max-height: 480px;
    display: block;
  }
  .spectrum-legend {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border);
  }
  @media (max-width: 767px) {
    .spectrum-legend { grid-template-columns: 1fr; }
  }
  .spectrum-legend__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
  }
  .spectrum-legend__chip {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border-radius: 4px;
    margin-top: 4px;
  }
  .spectrum-legend__chip--core  { background: #ffffff; border: 1px solid var(--border-strong); }
  .spectrum-legend__chip--forge { background: var(--blue); }
  .spectrum-legend__chip--edge  { background: var(--amber-light); }
  .spectrum-legend__title {
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: 0.25rem;
  }
  .spectrum-legend__detail {
    font-size: var(--fs-body-sm);
    color: var(--text-tertiary);
    line-height: 1.55;
  }

  /* Security model table */
  .security-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
  }
  .security-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    font-size: var(--fs-body);
  }
  .security-table th,
  .security-table td {
    padding: var(--space-4) var(--space-6);
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--border);
  }
  .security-table th {
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    background: var(--bg-subtle);
    white-space: nowrap;
    font-size: var(--fs-body-sm);
    letter-spacing: 0.02em;
    text-transform: uppercase;
  }
  .security-table tr:last-child td { border-bottom: none; }
  .security-table td:first-child {
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    width: 32%;
  }
  .security-table td {
    color: var(--text-secondary);
  }

  /* Privacy boundary illustration */
  .privacy-illustration {
    background: var(--navy-deep);
    color: var(--text-on-dark);
    border-radius: var(--radius-lg);
    padding: var(--space-12);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
  }
  @media (max-width: 1023px) {
    .privacy-illustration { grid-template-columns: 1fr; padding: var(--space-8); }
  }
  .privacy-illustration h2 { color: var(--text-on-dark); }
  .privacy-illustration p { color: var(--text-on-dark-soft); }
  .privacy-illustration svg { width: 100%; height: auto; }

  /* Self-healing stages */
  .recovery-stages {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-3);
    counter-reset: rstage;
  }
  @media (max-width: 1023px) {
    .recovery-stages { grid-template-columns: repeat(2, 1fr); }
  }
  @media (max-width: 539px) {
    .recovery-stages { grid-template-columns: 1fr; }
  }
  .recovery-stage {
    counter-increment: rstage;
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    border-top: 3px solid var(--blue);
    position: relative;
  }
  .recovery-stage:nth-child(1) { border-top-color: #16a34a; }
  .recovery-stage:nth-child(2) { border-top-color: var(--blue); }
  .recovery-stage:nth-child(3) { border-top-color: #f59e0b; }
  .recovery-stage:nth-child(4) { border-top-color: #f97316; }
  .recovery-stage:nth-child(5) { border-top-color: #ef4444; }
  .recovery-stage__num {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-2);
  }
  .recovery-stage__title {
    font-size: 1rem;
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
  }
  .recovery-stage__body {
    font-size: var(--fs-body-sm);
    color: var(--text-tertiary);
    line-height: 1.55;
  }

  /* Observability tiers */
  .obs-tiers {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
  @media (max-width: 1023px) {
    .obs-tiers { grid-template-columns: 1fr; }
  }
  .obs-tier {
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
  }
  .obs-tier__heading {
    font-size: var(--fs-eyebrow);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--tr-eyebrow);
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: var(--space-3);
  }
  .obs-tier__items {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }
  .obs-tier__items li {
    font-size: var(--fs-body-sm);
    color: var(--text-secondary);
    padding-left: 1.25rem;
    position: relative;
    line-height: 1.55;
  }
  .obs-tier__items li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 6px;
    height: 1px;
    background: var(--text-tertiary);
  }

  /* Two-column claim/proof grid for audit / cost governance */
  .claim-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
  @media (max-width: 767px) {
    .claim-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  }
  .claim h3 {
    font-size: var(--fs-h4);
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-3);
  }
  .claim p {
    color: var(--text-secondary);
    line-height: var(--lh-body);
  }
  .claim p + p { margin-top: var(--space-3); }
}