/* ============================================================
   Component Styles
   ============================================================ */

/* ---- Header ----------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--header-height);
  background: var(--color-moss);
  border-bottom: 3px solid var(--color-gold);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-lg);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}
.site-logo svg { width: 38px; height: 38px; }
.site-logo-text {
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.2;
  color: #fff;
}
.site-logo-text span {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--color-gold);
  letter-spacing: 0.06em;
}
.site-logo:hover .site-logo-text { color: var(--color-gold); }

/* Nav */
.site-nav { display: flex; align-items: center; gap: var(--space-xs); }

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,.85);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.nav-link svg { width: 16px; height: 16px; flex-shrink: 0; }
.nav-link:hover {
  background: rgba(255,255,255,.12);
  color: #fff;
  text-decoration: none;
}

.nav-link.active {
  background: var(--color-gold);
  color: var(--color-moss);
  font-weight: 700;
}
.nav-link.active:hover { background: #daa52e; }

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: 2px solid rgba(255,255,255,.5);
  border-radius: var(--radius);
  padding: 6px 10px;
  cursor: pointer;
  color: #fff;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--color-moss);
    border-bottom: 3px solid var(--color-gold);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-sm) var(--gutter) var(--space-md);
    gap: 2px;
    box-shadow: var(--shadow-lg);
  }
  .site-nav.open { display: flex; }
  .nav-link { font-size: 0.95rem; padding: 10px 14px; }
}

/* ---- Footer ----------------------------------------------- */
.site-footer {
  background: var(--color-moss);
  color: rgba(255,255,255,.8);
  border-top: 3px solid var(--color-gold);
  padding-block: var(--space-xl) var(--space-lg);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
  margin-top: 0;
}

.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 6px; }
.footer-col a {
  color: rgba(255,255,255,.75);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--color-gold); text-decoration: none; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.15);
  padding-top: var(--space-md);
  font-size: 0.8rem;
  color: rgba(255,255,255,.5);
  text-align: center;
}

/* ---- Breadcrumbs ------------------------------------------ */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: var(--space-lg);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.breadcrumbs a { color: var(--color-olive); font-weight: 500; }
.breadcrumbs a:hover { color: var(--color-copper); }
.breadcrumb-sep { color: var(--color-border); }
.breadcrumbs span[aria-current] { color: var(--color-copper); font-weight: 600; }

/* ---- Page header area ------------------------------------- */
.page-hero {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 2px solid var(--color-border);
}

/* ---- Cards ----------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-block: var(--space-lg);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-gold);
  transform: translateY(-2px);
}
.card-icon { font-size: 1.8rem; line-height: 1; }
.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-olive);
  margin: 0;
}
.card-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  flex: 1;
  margin: 0;
}
.card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-copper);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-xs);
}
.card-link:hover { color: var(--color-gold); text-decoration: none; }
.card-link::after { content: ' →'; }

/* Card as full link */
a.card { text-decoration: none; }
a.card .card-title { color: var(--color-olive); }
a.card:hover .card-title { color: var(--color-copper); }

/* ---- Homepage intro text ---------------------------------- */
.home-intro {
  margin-bottom: var(--space-2xl);
  padding-block: var(--space-lg);
}

.home-intro p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  max-width: 100%;
  margin-bottom: var(--space-md);
}

.home-intro .home-intro-lead {
  font-size: 1.1rem;
  color: var(--color-moss);
  font-weight: 500;
}

/* ---- Hero (homepage) -------------------------------------- */
.hero {
  background: var(--gradient-hero);
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 5vw, 4rem);
  margin-bottom: var(--space-2xl);
  color: #fff;
  text-align: center;
}
.hero h1 {
  -webkit-text-fill-color: #fff;
  background: none;
  color: #fff;
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: var(--space-md);
}
.hero p {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: rgba(255,255,255,.88);
  max-width: 700px;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

/* ---- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--color-gold);
  color: var(--color-moss);
  border-color: var(--color-gold);
}
.btn-primary:hover {
  background: #daa52e;
  text-decoration: none;
  color: var(--color-moss);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(201,151,43,.4);
}
.btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.6);
}
.btn-secondary:hover {
  background: rgba(255,255,255,.15);
  color: #fff;
  text-decoration: none;
  border-color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--color-olive);
  border-color: var(--color-olive);
}
.btn-outline:hover {
  background: var(--color-olive);
  color: #fff;
  text-decoration: none;
}

/* ---- Section titles --------------------------------------- */
.section-title {
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  color: var(--color-olive);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.section-title::after {
  content: '';
  flex: 1;
  height: 2px;
  background: var(--color-border);
  margin-left: var(--space-sm);
}

/* ---- Copy button ------------------------------------------ */
.code-wrapper { position: relative; }

.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 4px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition), background var(--transition), color var(--transition);
  letter-spacing: 0.04em;
  z-index: 10;
}
.code-wrapper:hover .copy-btn,
.copy-btn:focus { opacity: 1; }
.copy-btn.copied {
  background: var(--color-olive);
  color: #fff;
  border-color: var(--color-olive);
  opacity: 1;
}

/* ---- Mermaid diagrams ------------------------------------- */
.mermaid-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-block: var(--space-lg);
  overflow-x: auto;
  text-align: center;
}

/* ---- Accordions (FAQ) ------------------------------------- */
.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-sm);
  overflow: hidden;
  background: var(--color-surface);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-olive);
  transition: background var(--transition), color var(--transition);
}
.accordion-trigger:hover { background: var(--color-surface-2); color: var(--color-copper); }
.accordion-trigger[aria-expanded="true"] { color: var(--color-copper); }

.accordion-chevron {
  flex-shrink: 0;
  width: 18px; height: 18px;
  transition: transform 200ms ease;
  color: var(--color-gold);
}
.accordion-trigger[aria-expanded="true"] .accordion-chevron { transform: rotate(180deg); }

.accordion-body {
  display: none;
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: var(--line-height);
}
.accordion-body.open { display: block; }
.accordion-body p:last-child { margin-bottom: 0; }

/* ---- Checkboxes ------------------------------------------- */
.task-list { list-style: none; padding-left: 0; }
.task-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.task-list input[type="checkbox"] {
  accent-color: var(--color-olive);
  width: 1rem;
  height: 1rem;
  margin-top: 0.25rem;
  flex-shrink: 0;
  cursor: pointer;
}
.task-list .task-label { cursor: pointer; transition: color var(--transition); }
.task-list input[type="checkbox"]:checked + .task-label {
  text-decoration: line-through;
  color: var(--color-muted);
}

/* ---- Related content -------------------------------------- */
.related-section {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 2px solid var(--color-border);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.related-card {
  display: block;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
}
.related-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-gold);
  transform: translateY(-2px);
  text-decoration: none;
}
.related-card-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: 4px;
}
.related-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-olive);
  line-height: 1.35;
}
.related-card:hover .related-card-title { color: var(--color-copper); }

/* ---- Pillar index — in-this-section ----------------------- */
.in-section { margin-block: var(--space-lg); }

/* ---- Article nav (prev/next) ------------------------------ */
.article-nav {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 2px solid var(--color-border);
}
.article-nav-prev,
.article-nav-next {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition);
}
.article-nav-next { text-align: right; align-items: flex-end; }
.article-nav-prev:hover,
.article-nav-next:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}
.article-nav-meta {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-gold);
}
.article-nav-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-olive);
}

/* ---- Skip link -------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-gold);
  color: var(--color-moss);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  z-index: 9999;
  transition: top var(--transition);
}
.skip-link:focus { top: var(--space-sm); }

/* ---- Back link -------------------------------------------- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-olive);
  text-decoration: none;
  margin-bottom: var(--space-lg);
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: all var(--transition);
}
.back-link:hover {
  background: var(--color-olive);
  color: #fff;
  border-color: var(--color-olive);
  text-decoration: none;
}
.back-link::before { content: '←'; }

/* ---- Prism theme override (light, olive tones) ------------ */
code[class*="language-"],
pre[class*="language-"] {
  color: #3a3520;
  background: var(--color-code-bg);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  text-shadow: none;
  tab-size: 2;
}
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #7a7560; font-style: italic; }
.token.punctuation { color: #5a5240; }
.token.property, .token.tag, .token.boolean, .token.number { color: #b05e2f; }
.token.selector, .token.attr-name, .token.string, .token.char { color: #4a5e2a; }
.token.atrule, .token.attr-value, .token.keyword { color: #6b7c3a; font-weight: 600; }
.token.function, .token.class-name { color: #c9972b; }
.token.regex, .token.important, .token.variable { color: #b05e2f; }
.token.operator { color: #5a5240; }
.token.url { color: #4a5e2a; }

/* ---- Responsive helpers ----------------------------------- */
@media (max-width: 600px) {
  .hero-buttons { flex-direction: column; align-items: center; }
  .article-nav { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
}