/* ============================================================
   NW Agentic — Tier subpage styles
   nwagentic.ai
   ============================================================
   Shared styles for /platform/core/, /platform/forge/, and
   /platform/private-edge/. Per-tier accent color is driven by
   a wrapper class on <body> — body.tier-page--core / --forge / --edge.

   Depends on: tokens.css, base.css, partials.css.
   See DESIGN.md §5.3.
   ============================================================ */

@layer components {

  /* Per-tier accent — overrides --tier-color used by accents below.
     Core uses navy ink because pure white is unreadable as an
     accent. The colored chip in the hero still shows the white square. */
  body.tier-page--core  { --tier-color: var(--text-primary); --tier-bg-soft: rgba(15, 28, 46, 0.04); }
  body.tier-page--forge { --tier-color: var(--blue);          --tier-bg-soft: rgba(37, 99, 235, 0.08); }
  body.tier-page--edge  { --tier-color: var(--amber);         --tier-bg-soft: rgba(245, 158, 11, 0.10); }

  /* ─────────────────────────────────────────────────────────
     HERO
     ───────────────────────────────────────────────────────── */
  .tier-hero {
    background: var(--navy-deep);
    color: var(--text-on-dark);
    padding-block: 9rem 5rem;
    position: relative;
    overflow: hidden;
  }
  .tier-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
      radial-gradient(900px 500px at 90% 10%, rgba(37, 99, 235, 0.18), transparent 60%),
      radial-gradient(700px 500px at 5% 95%, rgba(245, 158, 11, 0.12), transparent 60%);
    pointer-events: none;
  }
  .tier-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 880px;
  }
  .tier-hero__chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--fs-eyebrow);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--tr-eyebrow);
    text-transform: uppercase;
    color: var(--text-on-dark);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 0.4em 1em;
    border-radius: var(--radius-pill);
    margin-block-end: var(--space-6);
  }
  .tier-hero__chip-square {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    flex-shrink: 0;
  }
  body.tier-page--core  .tier-hero__chip-square { background: #ffffff; border: 1px solid rgba(255, 255, 255, 0.5); }
  body.tier-page--forge .tier-hero__chip-square { background: var(--blue); }
  body.tier-page--edge  .tier-hero__chip-square { background: var(--amber-light); }

  .tier-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;
  }
  .tier-hero h1 em,
  .tier-hero h1 .accent {
    color: var(--blue-bright);
    font-style: normal;
  }
  body.tier-page--edge .tier-hero h1 em,
  body.tier-page--edge .tier-hero h1 .accent { color: var(--amber-light); }

  .tier-hero__sub {
    font-size: var(--fs-body-lg);
    color: var(--text-on-dark-soft);
    line-height: var(--lh-body);
    max-width: 640px;
    margin-block-end: var(--space-8);
  }
  .tier-hero__actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
  }

  /* ─────────────────────────────────────────────────────────
     "WHO THIS IS FOR" — three bullets
     ───────────────────────────────────────────────────────── */
  .who-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
  @media (max-width: 1023px) {
    .who-grid { grid-template-columns: 1fr; }
  }
  .who-card {
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    border-left: 3px solid var(--tier-color);
  }
  .who-card__title {
    font-size: 1.0625rem;
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
  }
  .who-card__body {
    font-size: var(--fs-body-sm);
    color: var(--text-secondary);
    line-height: 1.6;
  }

  /* ─────────────────────────────────────────────────────────
     "WHAT'S INCLUDED" — checklist
     ───────────────────────────────────────────────────────── */
  .included-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4) var(--space-12);
  }
  @media (max-width: 767px) {
    .included-grid { grid-template-columns: 1fr; gap: var(--space-3); }
  }
  .included-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding-block: var(--space-3);
    border-bottom: 1px solid var(--border);
  }
  .included-item:last-child,
  .included-grid > .included-item:nth-last-child(-n+2) { border-bottom: none; }
  @media (max-width: 767px) {
    .included-grid > .included-item:nth-last-child(-n+2) { border-bottom: 1px solid var(--border); }
    .included-grid > .included-item:last-child { border-bottom: none; }
  }
  .included-item__icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--tier-bg-soft);
    color: var(--tier-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 2px;
  }
  .included-item__icon svg { width: 12px; height: 12px; }
  .included-item__text {
    font-size: var(--fs-body);
    color: var(--text-secondary);
    line-height: 1.55;
  }
  .included-item__text strong {
    color: var(--text-primary);
    font-weight: var(--fw-semibold);
  }

  /* ─────────────────────────────────────────────────────────
     OPERATING MODEL — three columns: NWA / You / System
     ───────────────────────────────────────────────────────── */
  .operating {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
  @media (max-width: 1023px) {
    .operating { grid-template-columns: 1fr; }
  }
  .operating-col {
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
  }
  .operating-col__heading {
    font-size: var(--fs-eyebrow);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--tr-eyebrow);
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border);
  }
  .operating-col__heading--accent {
    color: var(--tier-color);
    border-bottom-color: var(--tier-color);
  }
  .operating-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }
  .operating-col li {
    font-size: var(--fs-body-sm);
    color: var(--text-secondary);
    line-height: 1.55;
    padding-left: 1.25rem;
    position: relative;
  }
  .operating-col li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 6px;
    height: 1px;
    background: var(--text-tertiary);
  }

  /* ─────────────────────────────────────────────────────────
     ARCHITECTURE BAND — diagram + paragraph
     ───────────────────────────────────────────────────────── */
  .tier-arch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
    padding: var(--space-12);
    background: var(--navy-deep);
    border-radius: var(--radius-lg);
    color: var(--text-on-dark);
  }
  @media (max-width: 1023px) {
    .tier-arch { grid-template-columns: 1fr; padding: var(--space-8); }
  }
  .tier-arch h2 { color: var(--text-on-dark); }
  .tier-arch p { color: var(--text-on-dark-soft); }
  .tier-arch__visual {
    background: var(--navy-mid);
    border: 1px solid var(--border-on-dark);
    border-radius: var(--radius);
    padding: var(--space-6);
  }
  .tier-arch__visual svg { width: 100%; height: auto; }

  /* ─────────────────────────────────────────────────────────
     PRICING POINTER — tier specific
     ───────────────────────────────────────────────────────── */
  .tier-pricing {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-6);
    padding: var(--space-8) var(--space-12);
    background: var(--bg-subtle);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    border-left: 4px solid var(--tier-color);
  }
  .tier-pricing__amount {
    font-size: var(--fs-h3);
    font-weight: var(--fw-bold);
    color: var(--text-primary);
  }
  .tier-pricing__note {
    font-size: var(--fs-body-sm);
    color: var(--text-tertiary);
    margin-top: 0.25rem;
  }

  /* ─────────────────────────────────────────────────────────
     FAQ — schema-friendly accordion
     ───────────────────────────────────────────────────────── */
  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: 880px;
    margin-inline: auto;
    border-top: 1px solid var(--border);
  }
  .faq-item {
    border-bottom: 1px solid var(--border);
    padding-block: var(--space-6);
  }
  .faq-item summary {
    list-style: none;
    cursor: pointer;
    font-size: var(--fs-body-lg);
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '+';
    color: var(--tier-color);
    font-size: 1.5rem;
    font-weight: var(--fw-regular);
    transition: transform var(--t);
  }
  .faq-item[open] summary::after { transform: rotate(45deg); }
  .faq-item__body {
    padding-top: var(--space-4);
    color: var(--text-secondary);
    line-height: var(--lh-body);
  }
  .faq-item__body p + p { margin-top: var(--space-3); }

  /* ─────────────────────────────────────────────────────────
     SECTION HEAD (left-aligned, narrower)
     ───────────────────────────────────────────────────────── */
  .tier-section-head {
    margin-bottom: var(--space-8);
    max-width: 720px;
  }
  .tier-section-head h2 {
    font-size: clamp(1.625rem, 3vw, 2.25rem);
    margin-bottom: var(--space-3);
    text-wrap: balance;
  }
  .tier-section-head p {
    font-size: var(--fs-body-lg);
    color: var(--text-secondary);
    line-height: 1.6;
  }
}
