/* ============================================
   Hub Job List — Library Desk & Resource Atlas
   Pure CSS, system fonts, no external deps
   D3: hybrid_editorial_conversion_grid
   D4: narrow_content_wide_media_system
   ============================================ */

/* --------------------------------------------
   TOKENS (D4: WT6 width tokens)
   -------------------------------------------- */
:root {
  /* Spacing (rhythmic, D3: GG4) */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-s: 0.75rem;
  --space-m: 1rem;
  --space-l: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;

  /* Gaps (D3: GG4 rhythmic_variable) */
  --gap-tight: 0.5rem;
  --gap-base: 1rem;
  --gap-wide: 1.5rem;
  --gap-loose: 2rem;
  --gap-xloose: 2.5rem;

  /* Width tokens (D4: Wn, Wb, Ww, Wx, Wi, Wf) */
  --w-narrow: 42rem;   /* Wn: readable content */
  --w-base: 48rem;     /* Wb: base content */
  --w-wide: 64rem;     /* Ww: wide sections */
  --w-extra: 80rem;    /* Wx: atlas, catalog full */
  --w-inset: 36rem;    /* Wi: aside panels */
  --w-full: 100%;      /* Wf */

  /* Typography */
  --text-xs: 0.8125rem;
  --text-s: 0.875rem;
  --text-base: 1rem;
  --text-m: 1.0625rem;
  --text-l: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;

  --line-tight: 1.25;
  --line-base: 1.5;
  --line-relaxed: 1.6;

  /* Colors (library/atlas: muted, warm) */
  --color-bg: #f8f7f4;
  --color-bg-alt: #f0eeea;
  --color-bg-panel: #e8e6e0;
  --color-bg-shelf: #e2dfd8;
  --color-text: #1c1b19;
  --color-text-muted: #5a5854;
  --color-accent: #3d4a3a;
  --color-accent-hover: #4d5a4a;
  --color-border: #d2cfc8;
  --color-border-light: #e4e2dc;

  /* Focus (accessibility) */
  --focus-ring: 2px solid var(--color-accent);
  --focus-offset: 2px;
}

/* --------------------------------------------
   BASE / RESET
   -------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: var(--text-base);
  line-height: var(--line-base);
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* --------------------------------------------
   TYPOGRAPHY
   -------------------------------------------- */
h1, h2, h3, h4 {
  line-height: var(--line-tight);
  margin-top: 0;
}

h1 { font-size: var(--text-2xl); margin-bottom: var(--space-m); }
h2 { font-size: var(--text-xl); margin-bottom: var(--space-s); }
h3 { font-size: var(--text-l); margin-bottom: var(--space-s); }

p {
  margin: 0 0 var(--space-m);
}

p:last-child {
  margin-bottom: 0;
}

.eyebrow {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-xs);
}

.text-muted {
  color: var(--color-text-muted);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------
   LAYOUT / GRID (D3: 12_col_standard, SG6 aside_track)
   -------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--w-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-l);
  padding-right: var(--space-l);
}

.container--narrow { max-width: var(--w-narrow); }
.container--base { max-width: var(--w-base); }
.container--wide { max-width: var(--w-wide); }
.container--extra { max-width: var(--w-extra); }

/* --------------------------------------------
   CONTAINERS (D4: CF5 narrow_content_wide_media)
   -------------------------------------------- */
.section-inner {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-l);
  padding-right: var(--space-l);
}

.section-inner--w-wide { max-width: var(--w-wide); }
.section-inner--w-extra { max-width: var(--w-extra); }
.section-inner--w-base { max-width: var(--w-base); }
.section-inner--w-narrow { max-width: var(--w-narrow); }

/* --------------------------------------------
   COMPONENTS: Header / Nav
   -------------------------------------------- */
.site-header {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-m) 0;
}

.nav-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-m);
}

.site-logo {
  font-weight: 600;
  font-size: var(--text-m);
  color: var(--color-text);
}

.site-logo:hover {
  text-decoration: none;
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: var(--space-xs) var(--space-s);
  font-size: var(--text-l);
  cursor: pointer;
  color: var(--color-text);
}

.nav-toggle:hover {
  background: var(--color-bg-panel);
}

.nav-toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-l);
}

.nav-links a {
  font-size: var(--text-s);
}

/* --------------------------------------------
   COMPONENTS: Hero (D1: hero_with_featured_links_panel)
   -------------------------------------------- */
.hero-library-desk {
  padding: var(--space-2xl) 0 var(--space-xl);
}

.hero-split {
  display: grid;
  grid-template-columns: 1fr minmax(16rem, var(--w-inset));
  gap: var(--space-2xl);
  align-items: start;
}

.hero-intro .eyebrow {
  margin-bottom: var(--space-xs);
}

.hero-intro h1 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-m);
}

.hero-subtext {
  max-width: 38rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-l);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-m);
  margin-bottom: var(--space-l);
}

.cta-primary {
  font-weight: 600;
}

.cta-secondary {
  font-size: var(--text-s);
  color: var(--color-text-muted);
}

.cta-secondary:hover {
  color: var(--color-accent);
}

/* Desk Drawer panel (right) */
.desk-drawer {
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border-light);
  padding: var(--space-l);
  border-radius: 2px;
}

.desk-drawer h2 {
  font-size: var(--text-s);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-m);
}

.desk-drawer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.desk-drawer-links li {
  margin-bottom: var(--space-xs);
}

.desk-drawer-links a {
  display: block;
  padding: var(--space-xs) 0;
  font-size: var(--text-s);
}

.desk-drawer-footer {
  margin-top: var(--space-l);
  padding-top: var(--space-m);
  border-top: 1px solid var(--color-border-light);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* Atlas legend chips (under hero) */
.atlas-legend-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-s);
  margin-top: var(--space-xl);
  padding-top: var(--space-m);
  border-top: 1px solid var(--color-border-light);
}

.atlas-legend-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.atlas-legend-chip::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-accent);
  border-radius: 1px;
}

.atlas-legend-chip[data-legend="paths"]::before { background: var(--color-text-muted); }
.atlas-legend-chip[data-legend="featured"]::before { background: var(--color-accent); }
.atlas-legend-chip[data-legend="shelf"]::before { background: var(--color-border); }

/* --------------------------------------------
   COMPONENTS: Resource Atlas (D2: R6 hub_tiles_then_deep_links)
   -------------------------------------------- */
.resource-atlas {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-alt);
}

.atlas-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-m);
  margin-bottom: var(--space-xl);
}

.atlas-header h2 {
  margin: 0;
}

.atlas-usage {
  font-size: var(--text-s);
  color: var(--color-text-muted);
  max-width: 28rem;
}

.atlas-tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-loose);
}

.atlas-tile {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  padding: var(--space-l);
  border-radius: 2px;
}

.atlas-tile h3 {
  font-size: var(--text-m);
  margin: 0 0 var(--space-m);
  padding-bottom: var(--space-s);
  border-bottom: 1px solid var(--color-border-light);
}

.atlas-tile-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.atlas-tile-links li {
  margin-bottom: var(--space-xs);
}

.atlas-tile-links a {
  font-size: var(--text-s);
}

/* --------------------------------------------
   COMPONENTS: Learning Paths (D2: P7 intake_to_outcome_map)
   -------------------------------------------- */
.learning-paths {
  padding: var(--space-2xl) 0;
}

.learning-paths h2 {
  margin-bottom: var(--space-l);
}

.path-blocks {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.path-block {
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-m);
}

.path-block h3 {
  font-size: var(--text-m);
  margin: 0 0 var(--space-s);
  color: var(--color-text-muted);
}

.path-block .path-intake {
  font-style: italic;
  font-size: var(--text-s);
  margin-bottom: var(--space-s);
}

.path-block .path-outcome {
  font-size: var(--text-s);
  color: var(--color-text-muted);
  margin-top: var(--space-s);
}

.path-block-links {
  list-style: none;
  margin: var(--space-s) 0 0;
  padding: 0;
}

.path-block-links li {
  margin-bottom: var(--space-xs);
}

.path-block-links a {
  font-size: var(--text-s);
}

/* --------------------------------------------
   COMPONENTS: Featured Shelf Pick (D2: R2 featured_resource_plus_list)
   -------------------------------------------- */
.featured-shelf-pick {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-alt);
}

.featured-shelf-pick h2 {
  margin-bottom: var(--space-l);
}

.featured-split {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.featured-excerpt {
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border-light);
  padding: var(--space-xl);
  border-radius: 2px;
}

.featured-excerpt h3 {
  margin: 0 0 var(--space-m);
}

.featured-excerpt p {
  margin: 0;
  color: var(--color-text-muted);
}

.featured-excerpt .cta-row {
  margin-top: var(--space-m);
  margin-bottom: 0;
}

.featured-related h3 {
  font-size: var(--text-s);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-m);
}

.featured-related-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.featured-related-links li {
  margin-bottom: var(--space-s);
}

/* --------------------------------------------
   COMPONENTS: Shelf Catalog (D2: R3 category_blocks_with_links)
   -------------------------------------------- */
.shelf-catalog {
  padding: var(--space-2xl) 0;
}

.shelf-catalog h2 {
  margin-bottom: var(--space-xl);
}

.shelf-groups {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl);
}

.shelf-group {
  border: 1px solid var(--color-border-light);
  background: var(--color-bg);
  padding: var(--space-l);
  border-radius: 2px;
}

.shelf-group h3 {
  font-size: var(--text-m);
  margin: 0 0 var(--space-s);
  padding-bottom: var(--space-s);
  border-bottom: 1px solid var(--color-border-light);
}

.shelf-group-desc {
  font-size: var(--text-s);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-m);
}

.shelf-group-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.shelf-group-links li {
  margin-bottom: var(--space-xs);
}

.shelf-group-links a {
  font-size: var(--text-s);
}

/* --------------------------------------------
   COMPONENTS: Full Catalog Rows (D2: R5 resource_rows_with_meta)
   -------------------------------------------- */
.full-catalog {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-alt);
}

.full-catalog h2 {
  margin-bottom: var(--space-xl);
}

.catalog-rows {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.catalog-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-l);
  align-items: baseline;
  padding: var(--space-m) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.catalog-row:last-child {
  border-bottom: none;
}

.catalog-row-meta {
  display: flex;
  gap: var(--space-m);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.catalog-row-helper {
  background: var(--color-bg-panel);
  padding: var(--space-m);
  border-radius: 2px;
  margin-top: var(--space-m);
  grid-column: 1 / -1;
}

.catalog-row-helper p {
  margin: 0;
  font-size: var(--text-s);
}

.catalog-row-helper a {
  font-weight: 600;
}

/* --------------------------------------------
   COMPONENTS: About / Operator (D2: X2 content_plus_aside_notes)
   -------------------------------------------- */
.about-section {
  padding: var(--space-2xl) 0;
}

.about-split {
  display: grid;
  grid-template-columns: 1fr minmax(14rem, 20rem);
  gap: var(--space-2xl);
  align-items: start;
}

.about-content p {
  max-width: 42rem;
}

.about-aside {
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border-light);
  padding: var(--space-l);
  border-radius: 2px;
}

.about-aside h3 {
  font-size: var(--text-s);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-m);
}

.about-aside p {
  margin: 0 0 var(--space-s);
  font-size: var(--text-s);
}

.about-aside p:last-child {
  margin-bottom: 0;
}

.disclaimer {
  font-size: var(--text-s);
  color: var(--color-text-muted);
  margin-top: var(--space-l);
  padding-top: var(--space-m);
  border-top: 1px solid var(--color-border-light);
}

/* --------------------------------------------
   COMPONENTS: Contact CTA (D2: A3 split_cta_text_action)
   -------------------------------------------- */
.contact-cta {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-alt);
}

.contact-cta-split {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-xl);
}

.contact-cta-text h2 {
  margin: 0 0 var(--space-s);
}

.contact-cta-text p {
  margin: 0;
  color: var(--color-text-muted);
}

.contact-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-m);
}

.contact-cta-actions a {
  font-weight: 600;
}

/* --------------------------------------------
   COMPONENTS: Footer
   -------------------------------------------- */
.site-footer {
  padding: var(--space-xl) 0 var(--space-l);
  border-top: 1px solid var(--color-border-light);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-m);
}

.footer-micro {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-m);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  font-size: var(--text-s);
}

/* --------------------------------------------
   POST TEMPLATE: Article layout
   -------------------------------------------- */
.post-utility-strip {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-s) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.post-utility-strip a {
  color: var(--color-text-muted);
}

.post-utility-strip a:hover {
  color: var(--color-accent);
}

.post-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-s);
  margin: var(--space-m) 0;
  font-size: var(--text-s);
}

.post-breadcrumb a {
  color: var(--color-text-muted);
}

.post-breadcrumb a:hover {
  color: var(--color-accent);
}

.post-breadcrumb span {
  color: var(--color-border);
}

.post-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-m);
  font-size: var(--text-s);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.article-body {
  max-width: var(--w-narrow);
  margin: 0 auto var(--space-2xl);
}

.article-body h2 { margin-top: var(--space-2xl); }
.article-body h3 { margin-top: var(--space-xl); }

/* Takeaways panel (collapsible) */
.takeaways-panel {
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border-light);
  padding: var(--space-l);
  margin-bottom: var(--space-xl);
  border-radius: 2px;
}

.takeaways-panel h3 {
  font-size: var(--text-m);
  margin: 0 0 var(--space-s);
}

.takeaways-panel-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--color-accent);
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.takeaways-panel-toggle:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

.takeaways-panel-content {
  margin-top: var(--space-s);
}

.takeaways-panel-content ul {
  margin: 0;
  padding-left: var(--space-l);
}

.takeaways-panel-content li {
  margin-bottom: var(--space-xs);
}

/* Cross-links section */
.cross-links {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border-light);
}

.cross-links-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.cross-links-group h3 {
  font-size: var(--text-s);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-m);
}

.cross-links-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.cross-links-group li {
  margin-bottom: var(--space-xs);
}

.cross-links-group a {
  font-size: var(--text-s);
}

.post-contact-mini {
  margin-top: var(--space-xl);
  padding: var(--space-m);
  background: var(--color-bg-alt);
  border-radius: 2px;
  font-size: var(--text-s);
}

.post-contact-mini p {
  margin: 0;
}

/* --------------------------------------------
   CONTACT PAGE
   -------------------------------------------- */
.contact-page-main {
  padding: var(--space-2xl) 0;
}

.contact-info {
  max-width: var(--w-narrow);
}

.contact-info dl {
  margin: 0 0 var(--space-xl);
}

.contact-info dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-top: var(--space-m);
}

.contact-info dt:first-child {
  margin-top: 0;
}

.contact-info dd {
  margin: var(--space-xs) 0 0;
}

.contact-form-stub {
  margin-top: var(--space-2xl);
  padding: var(--space-l);
  border: 1px dashed var(--color-border);
  background: var(--color-bg-alt);
  border-radius: 2px;
}

.contact-form-stub p {
  margin: 0;
  font-size: var(--text-s);
  color: var(--color-text-muted);
}

.contact-form-stub strong {
  display: block;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

/* --------------------------------------------
   PRIVACY PAGE
   -------------------------------------------- */
.privacy-main {
  padding: var(--space-2xl) 0;
}

.privacy-main h2 {
  margin-top: var(--space-2xl);
}

.privacy-main h2:first-child {
  margin-top: 0;
}

.privacy-main p,
.privacy-main ul {
  max-width: var(--w-narrow);
}

.privacy-main ul {
  padding-left: var(--space-l);
}

/* --------------------------------------------
   UTILITIES
   -------------------------------------------- */
.band {
  width: 100%;
}

.band--atlas {
  /* D4: BR3 section_full_bleed_rare - atlas only */
  background: var(--color-bg-alt);
}

/* --------------------------------------------
   RESPONSIVE (D3: BP4, CL1/CL4/CL6)
   -------------------------------------------- */
@media (max-width: 64rem) {
  .hero-split {
    grid-template-columns: 1fr;
  }

  .desk-drawer {
    order: -1;
    max-width: 100%;
  }

  .atlas-tiles {
    grid-template-columns: repeat(2, 1fr);
  }

  .path-blocks {
    grid-template-columns: 1fr;
  }

  .featured-split {
    grid-template-columns: 1fr;
  }

  .shelf-groups {
    grid-template-columns: 1fr;
  }

  .about-split {
    grid-template-columns: 1fr;
  }

  .about-aside {
    order: -1;
  }

  .catalog-row {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .catalog-row-meta {
    margin-top: var(--space-xs);
  }

  .cross-links-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 48rem) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: var(--space-s);
  }

  .nav-links.is-open {
    display: flex;
  }

  .atlas-tiles {
    grid-template-columns: 1fr;
  }

  .contact-cta-split {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 36rem) {
  .container,
  .section-inner {
    padding-left: var(--space-m);
    padding-right: var(--space-m);
  }

  .hero-intro h1 {
    font-size: var(--text-2xl);
  }

  .takeaways-panel-toggle {
    display: block;
  }

  .takeaways-panel-content.is-collapsed {
    display: none;
  }
}

/* Desktop: always show takeaways (toggle hidden) */
@media (min-width: 36.01rem) {
  .takeaways-panel-content.is-collapsed {
    display: block;
  }
}