/* ============================================================
   COMPONENTS
   Header, Footer, Breadcrumbs, Cards, Accordions,
   Checkboxes, Copy button, Content page layout, Homepage
   ============================================================ */

/* ═══════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-padding);
  gap: var(--space-6);
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--duration-fast) var(--easing-standard);
}
.header-logo:hover { opacity: 0.85; text-decoration: none; }
.header-logo svg { width: 40px; height: 40px; }
.header-logo-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

/* Nav */
.main-nav { display: flex; align-items: center; }
.nav-list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--space-1);
}
.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary-700);
  transition: background-color var(--duration-fast) var(--easing-standard),
              color var(--duration-fast) var(--easing-standard),
              transform var(--duration-fast) var(--easing-spring);
}
.nav-link:hover {
  background-color: var(--color-primary-50);
  color: var(--color-primary-900);
  text-decoration: none;
  transform: translateY(-1px);
}
.nav-link--active {
  background: var(--gradient-brand-soft);
  color: var(--color-primary-800);
  font-weight: var(--font-weight-semibold);
}
.nav-link--active::after {
  content: '';
  display: block;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
  position: absolute;
  bottom: -1px;
  left: var(--space-4);
  right: var(--space-4);
}
.nav-link { position: relative; }

.nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast);
}
.nav-toggle:hover { background-color: var(--color-primary-50); }
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-700);
  border-radius: var(--radius-full);
  transition: transform var(--duration-base) var(--easing-spring),
              opacity var(--duration-fast);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) var(--page-padding);
    box-shadow: var(--shadow-lg);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--duration-base) var(--easing-decelerate),
                opacity var(--duration-base) var(--easing-decelerate);
  }
  .main-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-list { flex-direction: column; gap: var(--space-1); }
  .nav-link { padding: var(--space-3) var(--space-4); }
}

/* ═══════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════ */
.site-footer {
  background: var(--color-primary-950);
  color: var(--color-primary-200);
  padding: var(--space-12) var(--page-padding) var(--space-8);
  margin-top: auto;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr repeat(3, auto);
  gap: var(--space-10);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: var(--space-8);
}
.footer-brand .header-logo-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: var(--font-size-xl);
  display: block;
  margin-bottom: var(--space-3);
}
.footer-tagline { color: var(--color-primary-300); font-size: var(--font-size-sm); }
.footer-col h4 {
  color: var(--color-accent-300);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
  margin-top: 0;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: var(--space-2); }
.footer-col a {
  color: var(--color-primary-300);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--duration-fast);
}
.footer-col a:hover { color: var(--color-accent-300); text-decoration: none; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-primary-400);
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ═══════════════════════════════════════════════════════════
   BREADCRUMBS
   ═══════════════════════════════════════════════════════════ */
.breadcrumbs {
  margin-bottom: var(--space-4);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.breadcrumbs li { display: flex; align-items: center; gap: var(--space-2); }
.breadcrumbs li:not(:last-child)::after {
  content: '/';
  color: var(--color-border-accent);
}
.breadcrumbs a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--duration-fast);
}
.breadcrumbs a:hover { color: var(--color-link-hover); }
.breadcrumbs [aria-current="page"] {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}

/* ═══════════════════════════════════════════════════════════
   CONTENT PAGE LAYOUT
   ═══════════════════════════════════════════════════════════ */
.content-page {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-10) var(--page-padding) var(--space-16);
}

.content-header { margin-bottom: var(--space-8); }

.content-title {
  font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
  font-weight: var(--font-weight-extrabold);
  line-height: var(--line-height-tight);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-2);
}

.content-body { width: 100%; }

/* Rendering-impact badges */
.content-body li strong:first-child,
.content-body p > strong:first-child {
  color: var(--color-primary-800);
}

/* ═══════════════════════════════════════════════════════════
   CODE BLOCKS WITH HEADER BAR (language label + copy button)
   ═══════════════════════════════════════════════════════════ */
.code-block-wrapper {
  position: relative;
  margin: var(--space-6) 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-code-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

/* Header bar sits above the <pre> */
.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary-100);
  border-bottom: 1px solid var(--color-code-border);
  gap: var(--space-3);
}

.code-language {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary-700);
}

/* Override pre styles when inside wrapper — remove its own border/radius/shadow */
.code-block-wrapper pre[class*="language-"],
.code-block-wrapper pre {
  margin: 0;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.copy-btn {
  flex-shrink: 0;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary-700);
  background: var(--color-surface);
  border: 1px solid var(--color-code-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--easing-standard),
              color var(--duration-fast) var(--easing-standard),
              transform var(--duration-fast) var(--easing-spring);
  white-space: nowrap;
}
.copy-btn:hover {
  background-color: var(--color-primary-600);
  color: #fff;
  border-color: var(--color-primary-600);
  transform: translateY(-1px);
}
.copy-btn.copied {
  background: var(--color-primary-600);
  color: #fff;
  border-color: var(--color-primary-600);
}

/* ═══════════════════════════════════════════════════════════
   FAQ ACCORDIONS
   ═══════════════════════════════════════════════════════════ */
.faq-accordion { margin: var(--space-6) 0; }

.faq-accordion details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  background: var(--color-surface);
  transition: box-shadow var(--duration-fast) var(--easing-standard);
  overflow: hidden;
}
.faq-accordion details:hover {
  box-shadow: var(--shadow-md);
}
.faq-accordion details[open] {
  border-color: var(--color-primary-400);
  box-shadow: var(--shadow-md);
}

.faq-accordion summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-800);
  font-size: var(--font-size-base);
  list-style: none;
  transition: background-color var(--duration-fast);
  user-select: none;
}
/* Text wrapper — keeps question as one flex item so code tags inside aren't scattered by space-between */
.faq-accordion summary .faq-question-text {
  flex: 1;
  min-width: 0;
}
/* Inline code inside accordion headers — use the same proportional font as the heading
   so Fira Code's wider monospace metrics do not create visual "extra space" around identifiers */
.faq-accordion summary .faq-question-text code {
  font-family: inherit !important;
  font-size: inherit !important;
  font-weight: var(--font-weight-semibold);
  background: none !important;
  border: none !important;
  padding: 0 !important;
  margin: 0 !important;
  border-radius: 0 !important;
  color: var(--color-primary-600);
  letter-spacing: inherit;
  word-spacing: inherit;
}
.faq-accordion summary::-webkit-details-marker { display: none; }
.faq-accordion details[open] > summary {
  background: var(--color-primary-50);
  border-bottom: 1px solid var(--color-border);
}
.faq-accordion summary:hover { background: var(--color-primary-50); }
.faq-accordion summary::after {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%237C3AED' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  transition: transform var(--duration-base) var(--easing-spring);
}
.faq-accordion details[open] > summary::after {
  transform: rotate(180deg);
}

.faq-answer {
  padding: var(--space-5) var(--space-5);
  color: var(--color-text-body);
}
.faq-answer p:last-child { margin-bottom: 0; }

/* ═══════════════════════════════════════════════════════════
   INTERACTIVE CHECKBOXES
   ═══════════════════════════════════════════════════════════ */
.task-list-item {
  list-style: none !important;
  margin-left: calc(-1 * var(--space-6));
  padding-left: var(--space-8);
  position: relative;
}
.task-list-item input[type="checkbox"] {
  position: absolute;
  left: var(--space-1);
  top: 0.3em;
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary-600);
  cursor: pointer;
}
.task-list-item label { cursor: pointer; }
.task-list-item input[type="checkbox"]:checked + label,
.task-list-item.is-checked label {
  text-decoration: line-through;
  color: var(--color-text-muted);
}
.task-list-item input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ═══════════════════════════════════════════════════════════
   HOMEPAGE
   ═══════════════════════════════════════════════════════════ */
.home-page { overflow: hidden; }

/* Hero */
.hero {
  position: relative;
  background: var(--gradient-hero);
  color: #fff;
  padding: clamp(var(--space-16), 10vw, var(--space-24)) var(--page-padding) clamp(var(--space-16), 8vw, var(--space-20));
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 30% 50%, rgba(139,92,246,0.3) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 60%, rgba(249,115,22,0.2) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
}
.hero-eyebrow {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-300);
  margin-bottom: var(--space-4);
}
.hero h1 {
  font-size: clamp(var(--font-size-4xl), 7vw, var(--font-size-6xl));
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  color: #fff;
  margin-bottom: var(--space-6);
  max-width: 18ch;
}
.hero h1 span {
  background: linear-gradient(90deg, #FBBF24, #F97316);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-description {
  font-size: clamp(var(--font-size-base), 2vw, var(--font-size-xl));
  line-height: var(--line-height-relaxed);
  color: rgba(255,255,255,0.85);
  max-width: 55ch;
  margin-bottom: var(--space-10);
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition: transform var(--duration-base) var(--easing-spring),
              box-shadow var(--duration-base) var(--easing-standard),
              background-color var(--duration-fast);
  cursor: pointer;
  border: none;
}
.btn:hover { transform: translateY(-2px); text-decoration: none; }
.btn-primary {
  background: linear-gradient(135deg, #FBBF24, #F97316);
  color: #fff;
  box-shadow: 0 4px 16px rgba(249,115,22,0.4);
}
.btn-primary:hover {
  box-shadow: 0 8px 24px rgba(249,115,22,0.5);
  color: #fff;
}
.btn-secondary {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.btn-icon { font-size: 1.25em; line-height: 1; }

/* Section layout */
.section {
  padding: clamp(var(--space-12), 6vw, var(--space-20)) var(--page-padding);
}
.section--alt { background: var(--color-bg-secondary); }
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}
.section-eyebrow {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-600);
  margin-bottom: var(--space-3);
}
.section-title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
  font-weight: var(--font-weight-extrabold);
}
.section-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: var(--space-4) auto 0;
  line-height: var(--line-height-relaxed);
}

/* Pillar cards */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}
/* Pillar cards — ghost-link pattern avoids nested <a> tags */
.pillar-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-decoration: none;
  position: relative;
  transition: transform var(--duration-base) var(--easing-spring),
              box-shadow var(--duration-base) var(--easing-standard),
              border-color var(--duration-fast);
  box-shadow: var(--shadow-card);
}

/* Card hover driven by the heading link inside it */
.pillar-card:has(.pillar-card-heading-link:hover),
.pillar-card:has(.pillar-card-heading-link:focus-visible) {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-300);
}

/* The heading link stretches to fill the whole card (ghost button pattern) */
.pillar-card-heading-link {
  text-decoration: none;
  color: inherit;
}
.pillar-card-heading-link::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-2xl);
}

/* Inner links and icon sit above the ghost overlay */
.pillar-card-links,
.pillar-icon {
  position: relative;
  z-index: 1;
}
.pillar-card > p {
  position: relative;
  z-index: 1;
}
.pillar-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  font-size: 1.75rem;
}
.pillar-icon--violet { background: var(--color-primary-100); }
.pillar-icon--orange { background: #FEF3C7; }
.pillar-icon--teal   { background: #D1FAE5; }

.pillar-card h3 {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  margin: 0 0 var(--space-3);
}
.pillar-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  flex: 1;
  margin-bottom: var(--space-5);
}
.pillar-card-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
  margin-top: auto;
}
.pillar-card-links a {
  font-size: var(--font-size-sm);
  color: var(--color-primary-700);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  transition: color var(--duration-fast), gap var(--duration-fast);
}
.pillar-card-links a::before {
  content: '→';
  opacity: 0.5;
  transition: opacity var(--duration-fast), transform var(--duration-fast);
}
.pillar-card-links a:hover {
  color: var(--color-link-hover);
  gap: var(--space-3);
}
.pillar-card-links a:hover::before {
  opacity: 1;
  transform: translateX(3px);
}

/* Features strip */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}
.feature-item {
  text-align: center;
  padding: var(--space-6);
}
.feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
  display: block;
}
.feature-item h4 {
  font-size: var(--font-size-base);
  color: var(--color-primary-800);
  margin: 0 0 var(--space-2);
}
.feature-item p { font-size: var(--font-size-sm); margin: 0; }

/* Intro text section */
.intro-section {
  max-width: var(--content-width);
  margin: 0 auto;
}
.intro-section p {
  font-size: clamp(var(--font-size-base), 2vw, var(--font-size-lg));
  line-height: var(--line-height-relaxed);
}