/* ==========================================================================
   Components — shared chrome and reusable pieces.
   Loaded by every page. Replaces the old topbar.css, footer.css,
   tool-card.css and reveal.css.

   .section-head lives here rather than in home.css because render.js
   injects it on /directory/ too; when it lived in home.css those headings
   rendered unstyled.
   ========================================================================== */

/* ---- Topbar -------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 60px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand:hover { color: var(--ink); }

.brand-mark {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  text-transform: uppercase;
}

.topbar nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

.topbar nav a {
  color: var(--muted);
  font-size: var(--text-sm);
  text-decoration: none;
}

.topbar nav a:hover { color: var(--ink); }

/* Current page gets weight and a rule, not just a hue shift — color alone
   is too weak an indicator for low-vision users. */
.topbar nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: var(--weight-medium);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}

/* The persistent lead-capture CTA. Styled as a button, so it reads as an
   action rather than a fifth nav item. */
.topbar nav a.topbar-cta {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  color: var(--accent);
  font-weight: var(--weight-medium);
}

.topbar nav a.topbar-cta:hover {
  background: var(--accent);
  color: var(--on-accent);
}

.topbar nav a.topbar-cta[aria-current="page"] {
  background: var(--accent);
  color: var(--on-accent);
  border-bottom-color: var(--accent);
  padding-bottom: var(--space-2);
}

/* ---- Footer -------------------------------------------------------------- */

.site-footer {
  margin-top: var(--space-9);
  border-top: 1px solid var(--rule);
  padding: var(--space-6) 0 var(--space-7);
}

/* Five columns, the way SWD uses its footer: a site map in disguise that
   keeps the free material one click from anywhere. */
.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-5);
}

.footer-col h2 {
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3) var(--space-5);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--rule);
}

.footer-note {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-sm);
  max-width: var(--measure);
}

.site-footer nav ul {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer nav a {
  color: var(--muted);
  font-size: var(--text-sm);
  text-decoration: none;
}

.site-footer nav a:hover { color: var(--ink); }
.site-footer nav a[aria-current="page"] { color: var(--ink); }

/* ---- Buttons ------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--on-accent);
}

.btn-outline {
  border-color: var(--rule);
  color: var(--ink);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* ---- Eyebrow / chips ----------------------------------------------------- */

.eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
}

.chip-live {
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  color: var(--accent);
}

/* ---- Section heading ----------------------------------------------------- */

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2) var(--space-5);
  margin-bottom: var(--space-5);
}

.section-head p {
  margin: 0;
  max-width: var(--measure);
  color: var(--muted);
  font-size: var(--text-sm);
}

/* ---- Tool cards ---------------------------------------------------------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.tool-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.tool-tag {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
}

.tool-card h3 {
  font-size: var(--text-lg);
}

.tool-card p {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-sm);
}

.tool-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-3);
  font-size: var(--text-sm);
}

.tool-status {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.tool-status.is-live { color: var(--accent); }
.tool-status.is-planned { color: var(--muted); }

.tool-link { font-weight: var(--weight-medium); }

.tool-grid-empty {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-sm);
}

/* ---- Scroll reveal -------------------------------------------------------
   Scoped to .js so the content is visible when JavaScript fails, is
   blocked, or is disabled. Previously an unscoped opacity:0 meant a script
   failure rendered whole pages blank. */

.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.js .reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---- Page template -------------------------------------------------------
   One template for every content page. Replaces the three forked .page
   blocks and the separate .page-head that used to live inline in four
   different files, each drifting from the others. */

.page-header {
  padding-block: var(--space-7) var(--space-6);
  border-bottom: 1px solid var(--rule);
}

.page-header .eyebrow {
  margin-bottom: var(--space-3);
}

.page-header h1 {
  max-width: 24ch;
}

.page-header p {
  margin-top: var(--space-4);
  max-width: var(--measure);
  font-family: var(--font-serif);
  font-size: var(--text-md);
  line-height: var(--leading-snug);
  color: var(--muted);
}

.page-body {
  padding-block: var(--space-7) var(--space-8);
}

/* Long-form prose. */
.prose {
  max-width: var(--measure);
}

.prose p {
  color: var(--muted);
}

.prose p + p,
.prose ul + p,
.prose p + ul {
  margin-top: var(--space-4);
}

.prose h2 {
  margin-top: var(--space-7);
  margin-bottom: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--rule);
}

.prose h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.prose h3 {
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

.prose ul {
  margin: 0;
  padding-left: var(--space-5);
  color: var(--muted);
}

.prose li + li {
  margin-top: var(--space-2);
}

/* ---- Card grid -----------------------------------------------------------
   Used by the hub pages and the homepage "explore" strip. */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-4);
}

.nav-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-5);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--transition);
}

.nav-card:hover {
  border-color: var(--accent);
  color: var(--ink);
}

/* Heading level varies by context: h2 on a hub page where the cards are the
   top-level sections, h3 on the homepage where they sit under a section
   heading. Both look the same. */
.nav-card h2,
.nav-card h3 {
  font-size: var(--text-lg);
}

.nav-card p {
  color: var(--muted);
  font-size: var(--text-sm);
}

.nav-card .card-more {
  margin-top: auto;
  padding-top: var(--space-3);
  color: var(--accent);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

/* ---- Offerings -----------------------------------------------------------
   The "three ways to work with this" row. */

.offerings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}

.offering {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-4);
  border-top: 2px solid var(--rule);
}

.offering.is-available {
  border-top-color: var(--accent);
}

.offering h2,
.offering h3 {
  font-size: var(--text-lg);
}

.offering p {
  color: var(--muted);
  font-size: var(--text-sm);
}

.offering .offering-action {
  margin-top: auto;
  padding-top: var(--space-4);
}

/* ---- To-be-built placeholder ---------------------------------------------
   Every unfinished section says what will go there and offers a live next
   step, so an empty page still does something useful. Grep for
   "placeholder" to find the whole backlog. */

.offerings + .placeholder,
.card-grid + .placeholder,
.prose + .placeholder {
  margin-top: var(--space-7);
}

.placeholder {
  padding: var(--space-6);
  border: 1px dashed var(--rule);
  border-radius: var(--radius-md);
  background: var(--surface);
  max-width: var(--measure);
}

.placeholder .eyebrow {
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.placeholder p {
  color: var(--muted);
}

.placeholder p + p {
  margin-top: var(--space-4);
}

/* Inline "to be built" marker, used in the site map listing. */
.sitemap-note {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
}

/* ---- CTA band ------------------------------------------------------------ */

.cta-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.cta-band p {
  color: var(--muted);
  max-width: 52ch;
}

.cta-band h2 {
  margin-bottom: var(--space-2);
}

/* ---- Responsive ----------------------------------------------------------
   Breakpoints for the whole site: 900px (layout collapse) and 600px
   (single column / stacked chrome). Keep new queries on these two values. */

@media (max-width: 600px) {
  .topbar-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    padding-block: var(--space-3);
  }

  .topbar nav ul {
    gap: var(--space-4);
  }

  .site-footer-inner {
    flex-direction: column;
  }

  .page-header {
    padding-block: var(--space-6) var(--space-5);
  }

  .page-body {
    padding-block: var(--space-6);
  }

  .placeholder,
  .cta-band {
    padding: var(--space-5);
  }

  .cta-band .btn {
    width: 100%;
  }
}