:root {
  --bg-hero: #0A1628;
  --bg-secondary-dark: #0F2040;
  --gradient-accent: linear-gradient(135deg, #1A6FE8 0%, #0EA5E9 100%);
  --bg-light: #FFFFFF;
  --bg-alt: #F7F9FC;
  --cta-primary: #1A6FE8;
  --cta-primary-hover: #155DC2;
  --accent-glow: rgba(26, 111, 232, 0.15);
  --text-dark-heading: #FFFFFF;
  --text-dark-body: #A8BFDB;
  --text-light-heading: #0A1628;
  --text-light-body: #4B5563;
  --success: #10B981;
  --border-light: #E5EAF0;
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --container-max: 1200px;
  --container-px: 24px;
  --section-py: 96px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 999px;
  --transition: 200ms ease;
}

html {
  scroll-behavior: smooth;
}

body.ds {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-light-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.ds-container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-px);
  padding-right: var(--container-px);
}

.ds-section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

.ds-hero-headline {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.ds-section-headline {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
}

.ds-sub-headline {
  font-size: 24px;
  font-weight: 600;
}

.ds-body-lg {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.7;
}

.ds-body {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
}

.ds-caption {
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--cta-primary);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  background: var(--cta-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -4px rgba(26, 111, 232, 0.35);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--cta-primary);
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--cta-primary);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-ghost:hover {
  background: rgba(26, 111, 232, 0.06);
}

.btn-dark-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-dark-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(26, 111, 232, 0.1);
  color: var(--cta-primary);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(26, 111, 232, 0.2);
}

.section-label-dark {
  background: rgba(26, 111, 232, 0.15);
  color: #7EB8FF;
  border-color: rgba(26, 111, 232, 0.3);
}

.stat-card {
  text-align: center;
}

.stat-card-number {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.stat-card-label {
  font-size: 13px;
  font-weight: 500;
  margin-top: 4px;
  line-height: 1.3;
}

.feature-card {
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.08), 0 4px 8px -4px rgba(0, 0, 0, 0.04);
}

.feature-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-light-heading);
  margin-bottom: 8px;
}

.feature-card-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-light-body);
}

.framework-badge {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-light);
  color: var(--text-light-body);
  background: var(--bg-light);
}

.framework-badge-dark {
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-dark-body);
  background: rgba(255, 255, 255, 0.05);
}

.ds-accordion {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: var(--bg-light);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.ds-accordion:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.ds-accordion summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-light-heading);
  display: flex;
  align-items: center;
}

.ds-accordion summary::-webkit-details-marker {
  display: none;
}

.ds-accordion summary::before {
  content: '+';
  margin-right: 12px;
  font-weight: 600;
  font-size: 20px;
  color: #9ca3af;
  display: inline-block;
  width: 20px;
  flex-shrink: 0;
  transition: color var(--transition);
}

.ds-accordion[open] summary::before {
  content: '\2212';
  color: var(--cta-primary);
}

.ds-accordion > div {
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-light-body);
}

.ds-divider {
  width: 100%;
  height: 1px;
  background: var(--border-light);
}

.ds-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: 72px;
  display: flex;
  align-items: center;
  transition: background-color 250ms ease, box-shadow 250ms ease, border-color 250ms ease;
}
.ds-nav-desktop { display: none !important; }
.ds-nav-mobile-btn { display: block; }
@media (min-width: 1024px) {
  .ds-nav-desktop { display: flex !important; flex-direction: row !important; flex-wrap: nowrap !important; align-items: center !important; gap: 0.5rem; font-size: 0.875rem; }
  .ds-nav-mobile-btn { display: none !important; }
  .ds-nav .ds-nav-mobile-btn { display: none !important; }
  button.ds-nav-mobile-btn { display: none !important; }
}

.ds-nav.nav-scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.ds-nav.nav-scrolled .nav-brand-text { color: var(--text-light-heading); }
.ds-nav.nav-scrolled .nav-link-item { color: var(--text-light-body); }
.ds-nav.nav-scrolled .nav-link-item:hover { color: var(--text-light-heading); }
.ds-nav.nav-scrolled .nav-signin { color: var(--text-light-body); border-color: var(--border-light); }
.ds-nav.nav-scrolled .nav-signin:hover { color: var(--text-light-heading); border-color: #c5cdd8; }

.nav-brand-text { color: #FFFFFF; transition: color 250ms ease; }
.nav-link-item { color: rgba(255,255,255,0.7); transition: color 200ms ease; cursor: pointer; }
.nav-link-item:hover { color: #FFFFFF; }
.nav-link-highlight { color: var(--cta-primary); transition: color 200ms ease; }
.ds-nav.nav-scrolled .nav-link-highlight { color: var(--cta-primary); }
.nav-signin {
  color: rgba(255,255,255,0.7);
  border: 1.5px solid rgba(255,255,255,0.2);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: all 200ms ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.nav-cta-desktop {
  display: none !important;
}
@media (min-width: 1024px) {
  .nav-cta-desktop { display: inline-flex !important; }
}
.nav-signin:hover { color: #FFFFFF; border-color: rgba(255,255,255,0.4); }

.nav-group { position: relative; }
.nav-group .mega-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 200ms ease, transform 200ms ease;
  padding-top: 12px;
}
.nav-group:hover .mega-dropdown,
.nav-group button[aria-expanded="true"] + .mega-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-panel {
  background: #FFFFFF;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  padding: 24px;
  min-width: 280px;
}

.mega-panel-wide { min-width: 520px; }

.mega-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-light-body);
  font-size: 14px;
  font-weight: 500;
  transition: all 150ms ease;
  text-decoration: none;
}
.mega-link:hover {
  background: var(--bg-alt);
  color: var(--text-light-heading);
}
.mega-link-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mega-card {
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  padding: 20px;
  color: #FFFFFF;
}
.mega-card a {
  color: #FFFFFF;
  font-weight: 600;
  font-size: 13px;
  text-decoration: none;
  opacity: 0.9;
  transition: opacity 150ms;
}
.mega-card a:hover { opacity: 1; }

.mega-heading {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #9ca3af;
  margin-bottom: 8px;
  padding: 0 12px;
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg-hero);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-overlay.open { transform: translateX(0); }

.mobile-nav-section { border-bottom: 1px solid rgba(255,255,255,0.08); }

.mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 24px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 150ms;
  text-align: left;
}
.mobile-nav-toggle:hover { color: #FFFFFF; }
.mobile-nav-toggle svg {
  width: 16px;
  height: 16px;
  opacity: 0.5;
  transition: transform 250ms ease;
  flex-shrink: 0;
}
.mobile-nav-section.open .mobile-nav-toggle svg { transform: rotate(180deg); }

.mobile-nav-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease, visibility 0s 300ms;
  visibility: hidden;
}
.mobile-nav-section.open .mobile-nav-panel { max-height: 400px; visibility: visible; transition: max-height 300ms ease, visibility 0s 0s; }

.mobile-overlay-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: color 150ms, background 150ms;
}
.mobile-overlay-link:hover { color: #FFFFFF; background: rgba(255,255,255,0.04); }

.mobile-overlay-sub {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 24px 10px 32px;
  font-size: 15px;
  font-weight: 400;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 150ms, background 150ms;
}
.mobile-overlay-sub:hover { color: #FFFFFF; background: rgba(255,255,255,0.04); }

.ds-footer {
  background: var(--bg-hero);
  padding: 80px 0 48px;
}

.ds-footer-heading {
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.ds-footer-link {
  display: block;
  color: #8A9BB0;
  font-size: 14px;
  padding: 4px 0;
  text-decoration: none;
  transition: color 150ms ease;
}
.ds-footer-link:hover { color: #FFFFFF; }

.ds-footer-social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: #FFFFFF;
  opacity: 0.6;
  transition: opacity 150ms ease;
}
.ds-footer-social:hover { opacity: 1; }

.ds-footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 40px;
  padding-top: 24px;
}

.ds-footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 500;
  color: #8A9BB0;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-static {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}
.nav-static .nav-brand-text { color: var(--text-light-heading); }
.nav-static .nav-link-item { color: var(--text-light-body); }
.nav-static .nav-link-item:hover { color: var(--text-light-heading); }
.nav-static .nav-link-highlight { color: var(--cta-primary); }
.nav-static .nav-signin { color: var(--text-light-body); border-color: var(--border-light); }
.nav-static .nav-signin:hover { color: var(--text-light-heading); border-color: #c5cdd8; }

@media (max-width: 768px) {
  .ds-hero-headline {
    font-size: 36px;
  }
  .ds-section-headline {
    font-size: 28px;
  }
  .ds-sub-headline {
    font-size: 20px;
  }
  .ds-section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .btn-primary,
  .btn-ghost,
  .btn-dark-ghost {
    padding: 12px 24px;
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .ds-hero-headline {
    font-size: 28px;
  }
  .ds-section-headline {
    font-size: 24px;
  }
  .ds-section {
    padding-top: 48px;
    padding-bottom: 48px;
  }
  .stat-card-number {
    font-size: 28px;
  }
}

@media (min-width: 768px) {
  .md\:col-span-3 { grid-column: span 3 / span 3; }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .md\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .md\:order-1 { order: 1; }
  .md\:order-2 { order: 2; }
}

@media (min-width: 1024px) {
  .lg\:flex { display: flex; }
  .lg\:col-span-2 { grid-column: span 2 / span 2; }
  .lg\:gap-8 { gap: 2rem; }
  .lg\:gap-16 { gap: 4rem; }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .lg\:text-5xl { font-size: 3rem; line-height: 1; }
  .lg\:text-\[40px\] { font-size: 40px; }
}

@media (min-width: 1280px) {
  .xl\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .xl\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}