/* ============================================================
   NW Agentic — Platform overview page styles
   nwagentic.ai
   ============================================================
   Page-unique sections only.

   Depends on: tokens.css, base.css, partials.css, pages/home.css
   (the platform page reuses tier-trio, deployment-spectrum,
   workflow-preview, and section-head from home.css).

   See DESIGN.md §5.2 for the page spec.
   ============================================================ */

@layer components {

  /* Hero — narrower than the home hero, no canvas (this page
     is content-dense; we keep motion to the home hero only). */
  .platform-hero {
    background: var(--navy-deep);
    color: var(--text-on-dark);
    padding-block: 9rem 5rem;
    position: relative;
    overflow: hidden;
  }
  .platform-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--brand-gradient-soft);
    opacity: 0.18;
    pointer-events: none;
  }
  .platform-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 880px;
  }
  .platform-hero__eyebrow {
    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);
  }
  .platform-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;
  }
  .platform-hero h1 em,
  .platform-hero h1 .accent {
    color: var(--blue-bright);
    font-style: normal;
  }
  .platform-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);
  }
  .platform-hero__actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
  }

  /* ─────────────────────────────────────────────────────────
     LIFECYCLE DIAGRAM
     ───────────────────────────────────────────────────────── */
  .lifecycle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-12);
  }
  @media (max-width: 767px) {
    .lifecycle { padding: var(--space-6); }
  }
  .lifecycle__steps {
    display: flex;
    align-items: stretch;
    gap: 0;
    flex-wrap: wrap;
    counter-reset: lifestep;
  }
  .lifecycle__step {
    counter-increment: lifestep;
    flex: 1 1 0;
    min-width: 160px;
    padding: var(--space-4);
    position: relative;
    text-align: center;
  }
  .lifecycle__step::after {
    content: '\2192';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 1.25rem;
  }
  .lifecycle__step:last-child::after { display: none; }
  @media (max-width: 767px) {
    .lifecycle__step::after {
      content: '\2193';
      right: 50%;
      top: auto;
      bottom: -16px;
      transform: translateX(50%);
    }
  }
  .lifecycle__step-name {
    font-size: var(--fs-body-sm);
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
  }
  .lifecycle__step-detail {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    line-height: 1.5;
  }
  .lifecycle__step::before {
    content: counter(lifestep, decimal-leading-zero);
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--blue);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-2);
  }

  /* ─────────────────────────────────────────────────────────
     ENTITY MODEL — visual stages
     ───────────────────────────────────────────────────────── */
  .entity-stages {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }
  @media (max-width: 1023px) {
    .entity-stages { grid-template-columns: repeat(2, 1fr); }
  }
  @media (max-width: 539px) {
    .entity-stages { grid-template-columns: 1fr; }
  }
  .entity-stage {
    padding: var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    position: relative;
  }
  .entity-stage__num {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--blue);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-3);
  }
  .entity-stage__name {
    font-size: 1.0625rem;
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
  }
  .entity-stage__detail {
    font-size: var(--fs-body-sm);
    color: var(--text-tertiary);
    line-height: 1.55;
  }

  /* ─────────────────────────────────────────────────────────
     GUARDRAILS GRID
     ───────────────────────────────────────────────────────── */
  .guardrails {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
  @media (max-width: 767px) {
    .guardrails { grid-template-columns: 1fr; }
  }
  .guardrail {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-6);
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
  }
  .guardrail__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--brand-gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue);
  }
  .guardrail__title {
    font-size: 1.0625rem;
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
  }
  .guardrail__body {
    font-size: var(--fs-body-sm);
    color: var(--text-secondary);
    line-height: 1.6;
  }

  /* ─────────────────────────────────────────────────────────
     RESPONSIBILITY MATRIX TABLE
     ───────────────────────────────────────────────────────── */
  .responsibility-table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
  }
  .responsibility-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    font-size: var(--fs-body-sm);
  }
  .responsibility-table th,
  .responsibility-table td {
    padding: var(--space-4) var(--space-6);
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--border);
  }
  .responsibility-table th {
    font-weight: var(--fw-semibold);
    color: var(--text-primary);
    background: var(--bg-subtle);
    white-space: nowrap;
  }
  .responsibility-table tr:last-child td { border-bottom: none; }
  .responsibility-table td:first-child {
    font-weight: var(--fw-medium);
    color: var(--text-primary);
    white-space: nowrap;
  }
  .responsibility-table .resp-square {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 3px;
    vertical-align: middle;
    margin-right: 0.4rem;
  }
  .responsibility-table .resp-yes { color: var(--success); font-weight: var(--fw-semibold); }
  .responsibility-table .resp-no  { color: var(--text-tertiary); }
}