/* ═══════════════════════════════════════════════
   Design Tokens
   ═══════════════════════════════════════════════ */
:root {
  /* Accent */
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-subtle: rgba(99, 102, 241, 0.08);
  --shadow-accent: 0 4px 14px rgba(99, 102, 241, 0.25);

  /* Surfaces — all white */
  --surface: #ffffff;
  --surface-alt: #f5f5f7;

  /* Text — Apple palette */
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-muted: #86868b;

  /* Borders & Shadows */
  --border: #e5e5e7;
  --border-hover: #d2d2d7;
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;

  /* Transitions */
  --transition-base: 0.2s ease;
  --transition-fast: 0.15s ease;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Plus Jakarta Sans', 'Inter', -apple-system, sans-serif;

  /* Layout */
  --max-width: 72rem;
}

/* ═══════════════════════════════════════════════
   Global: prevent horizontal overflow on mobile
   ═══════════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; }
html { width: 100%; }
body { overflow-x: hidden; width: 100%; max-width: 100vw; }

/* ═══════════════════════════════════════════════
   Shared Design System — Subpage Hero & Sections
   ═══════════════════════════════════════════════ */

/* Subpage Hero */
.hero-section {
  padding: 8rem 1.5rem 4rem;
  background: var(--surface);
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 1.5rem;
}
.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 48rem;
  margin: 0 auto 2.5rem;
  text-align: center;
}

/* CTA Buttons */
.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: var(--text-primary);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: box-shadow var(--transition-base), background var(--transition-base);
}
.cta-primary:hover {
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15);
}
.cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: var(--surface);
  color: var(--text-primary);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: border-color var(--transition-base);
}
.cta-secondary:hover {
  border-color: var(--text-primary);
}

/* Sections */
.section {
  padding: 6rem 1.5rem;
  background: var(--surface);
}
.section-alt {
  padding: 6rem 1.5rem;
  background: var(--surface-alt);
}
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 1.5rem;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 48rem;
  margin: 0 auto 3.5rem;
  line-height: 1.6;
}

/* Final CTA */
.final-cta {
  padding: 8rem 1.5rem;
  background: var(--surface);
  text-align: center;
}
.final-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
}
.final-cta p {
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* Shared Responsive */
@media (max-width: 768px) {
  .hero-title, .final-cta h2 { font-size: 2rem; }
  .section-title { font-size: 2rem; }
  .hero-section { padding: 6rem 1rem 3rem; }
  .section, .section-alt { padding: 4rem 1rem; }
  .final-cta { padding: 4rem 1rem; }
  .cta-buttons { flex-direction: column; align-items: center; }
}

/* ═══════════════════════════════════════════════
   Mega Menu Navigation
   ═══════════════════════════════════════════════ */

/* Vercel-style mega menu */
.mega-menu-trigger {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 1rem;
  color: #525252;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
  background: transparent;
  border: none;
  border-radius: 9999px;
}

.mega-menu-trigger:hover,
.mega-menu-trigger.active {
  background: #f5f5f5;
  color: #000;
}

.mega-menu-arrow {
  width: 14px;
  height: 14px;
  transition: transform 0.2s;
}

.mega-menu.open .mega-menu-arrow {
  transform: rotate(180deg);
}

.mega-menu-panel {
  position: absolute;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  top: 100%;
  margin-top: 0.25rem;
  background: #fafafa;
  border: 1px solid #e5e5e5;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
  z-index: 100;
}

.mega-menu.open .mega-menu-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.mega-menu-content {
  padding: 1.5rem 1.75rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  min-width: 800px;
}

.mega-menu-column h3 {
  font-size: 0.6875rem;
  font-weight: 600;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.mega-menu-item {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 0.5rem;
  margin: 0 -0.5rem 0.25rem -0.5rem;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: background 0.15s;
}

.mega-menu-item:hover {
  background: rgba(255, 255, 255, 0.7);
}

.mega-menu-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f0f0f0;
  border-radius: 0.5rem;
  border: 1px solid #e0e0e0;
  transition: all 0.2s;
}

.mega-menu-item:hover .mega-menu-icon {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
  border-color: rgba(102, 126, 234, 0.2);
}

.mega-menu-icon svg {
  width: 20px;
  height: 20px;
  color: #171717;
  transition: color 0.2s;
}

.mega-menu-item:hover .mega-menu-icon svg {
  color: #667eea;
}

.mega-menu-text {
  flex: 1;
  min-width: 0;
}

.mega-menu-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: #171717;
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.mega-menu-desc {
  font-size: 0.75rem;
  color: #737373;
  line-height: 1.5;
}

.nav-link {
  padding: 0.5rem 1rem;
  color: #525252;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  border-radius: 9999px;
}

.nav-link:hover {
  background: #f5f5f5;
  color: #000;
}

/* Subtle overlay when menu is open */
.mega-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.05);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  z-index: 99;
}

.mega-menu.open ~ .mega-menu-overlay {
  opacity: 1;
  visibility: visible;
}

/* Skip to main content link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  z-index: 9999;
}
.skip-link:focus {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  width: auto;
  height: auto;
  overflow: visible;
  background: #fff;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.375rem;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  color: var(--text-primary);
  text-decoration: none;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ═══════════════════════════════════════════════
   Keyboard Focus Indicators (WCAG 2.4.7)
   ═══════════════════════════════════════════════ */

/* Global focus ring */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Navigation links */
.nav-link:focus-visible {
  background: #f5f5f5;
  color: #000;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Mega menu trigger */
.mega-menu-trigger:focus-visible {
  background: #f5f5f5;
  color: #000;
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Mega menu items */
.mega-menu-item:focus-visible {
  background: rgba(255, 255, 255, 0.7);
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

/* CTA buttons */
.cta-primary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.cta-secondary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-color: var(--accent);
}

/* Cards */
.card:focus-visible,
.benefit-card:focus-visible,
.link-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

/* Card links */
.card-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Accent buttons */
.btn-accent:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px var(--accent);
}

/* Pricing CTAs */
.pricing-cta:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* FAQ buttons */
.faq-question:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}