:root {
  --color-bg: #0a0e17;
  --color-bg-alt: #111827;
  --color-bg-card: #1a2332;
  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;
  --color-text-heading: #f9fafb;
  --color-primary: #06b6d4;
  --color-primary-dark: #0891b2;
  --color-accent: #8b5cf6;
  --color-accent-dark: #7c3aed;
  --color-border: #374151;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.2s ease;
  --max-width: 1200px;
  --header-height: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-heading);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin-bottom: 1rem; }

ul, ol { margin-bottom: 1rem; padding-left: 1.5rem; }
li { margin-bottom: 0.5rem; }

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

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 14, 23, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo img { height: 40px; width: auto; }
.logo__text { font-size: 1.25rem; font-weight: 700; color: var(--color-text-heading); }

.nav { display: none; }
.nav__list { display: flex; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.nav__link {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.9375rem;
  padding: 0.5rem 0;
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width var(--transition);
}
.nav__link:hover { color: var(--color-text-heading); }
.nav__link:hover::after { width: 100%; }

.nav__dropdown { position: relative; }
.nav__dropdown-toggle { cursor: pointer; display: flex; align-items: center; gap: 0.25rem; }
.nav__dropdown-toggle::after { content: '▾'; font-size: 0.75rem; }
.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 0;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  box-shadow: var(--shadow-lg);
}
.nav__dropdown:hover .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav__dropdown-link {
  display: block;
  padding: 0.5rem 1.25rem;
  color: var(--color-text);
  font-size: 0.875rem;
}
.nav__dropdown-link:hover { background: var(--color-bg-alt); color: var(--color-primary); }

.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  padding: 2rem 1.5rem;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  z-index: 999;
}
.mobile-nav.active { transform: translateX(0); }
.mobile-nav__list { list-style: none; }
.mobile-nav__link {
  display: block;
  padding: 1rem 0;
  color: var(--color-text);
  font-size: 1.125rem;
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav__submenu { padding-left: 1rem; }
.mobile-nav__submenu-link { font-size: 1rem; color: var(--color-text-muted); }

@media (min-width: 1024px) {
  .nav { display: block; }
  .menu-toggle { display: none; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(6, 182, 212, 0.3);
  color: #fff;
}

.btn--secondary {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}
.btn--secondary:hover {
  background: var(--color-primary);
  color: var(--color-bg);
}

.btn--ghost {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn--lg { padding: 1rem 2.5rem; font-size: 1.125rem; }
.btn--sm { padding: 0.625rem 1.25rem; font-size: 0.875rem; }

/* Hero Section */
.hero {
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
  animation: pulse 15s ease-in-out infinite;
  z-index: -1;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.hero__content { max-width: 800px; margin: 0 auto; text-align: center; }
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 0.5rem 1rem;
  border-radius: 100px;
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}
.hero__title { margin-bottom: 1.5rem; }
.hero__title span { 
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__description {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  line-height: 1.8;
}
.hero__buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Sections */
.section { padding: 5rem 0; }
.section--alt { background: var(--color-bg-alt); }

.section__header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}
.section__label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}
.section__title { margin-bottom: 1rem; }
.section__description { color: var(--color-text-muted); font-size: 1.125rem; }

/* Cards */
.cards { display: grid; gap: 1.5rem; }
.cards--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.cards--3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.cards--4 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
}
.card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(139, 92, 246, 0.2));
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}
.card__title { font-size: 1.25rem; margin-bottom: 0.75rem; }
.card__text { color: var(--color-text-muted); font-size: 0.9375rem; margin-bottom: 1rem; }
.card__link { font-weight: 600; font-size: 0.9375rem; display: inline-flex; align-items: center; gap: 0.5rem; }
.card__link::after { content: '→'; transition: transform var(--transition); }
.card__link:hover::after { transform: translateX(4px); }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 2rem; text-align: center; }
.stat__value {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat__label { color: var(--color-text-muted); font-size: 0.9375rem; margin-top: 0.5rem; }

/* Features List */
.features-list { list-style: none; padding: 0; }
.features-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}
.features-list li:last-child { border-bottom: none; }
.features-list__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-bg);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: bold;
}

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 3rem; align-items: center; }
@media (min-width: 768px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-alt));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  margin: 3rem 0;
}
.cta-banner__title { margin-bottom: 1rem; }
.cta-banner__text { color: var(--color-text-muted); margin-bottom: 2rem; max-width: 600px; margin-left: auto; margin-right: auto; }

/* Breadcrumbs */
.breadcrumbs {
  padding: 1rem 0;
  font-size: 0.875rem;
}
.breadcrumbs__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}
.breadcrumbs__item { display: flex; align-items: center; gap: 0.5rem; }
.breadcrumbs__item:not(:last-child)::after { content: '/'; color: var(--color-text-muted); }
.breadcrumbs__link { color: var(--color-text-muted); }
.breadcrumbs__link:hover { color: var(--color-primary); }
.breadcrumbs__current { color: var(--color-text); }

/* Page Header */
.page-header {
  padding: 4rem 0 3rem;
  text-align: center;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.page-header__title { margin-bottom: 1rem; }
.page-header__description { color: var(--color-text-muted); font-size: 1.125rem; max-width: 700px; margin: 0 auto; }

/* Content */
.content { padding: 4rem 0; }
.content__wrapper { max-width: 800px; margin: 0 auto; }
.content h2 { margin-top: 3rem; }
.content h3 { margin-top: 2rem; }
.content ul, .content ol { margin-bottom: 1.5rem; }
.content p + ul, .content p + ol { margin-top: -0.5rem; }

/* Tables */
.table-wrapper { overflow-x: auto; margin: 2rem 0; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}
th, td {
  padding: 1rem 1.25rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
th { background: var(--color-bg-alt); font-weight: 600; color: var(--color-text-heading); }
tr:last-child td { border-bottom: none; }
tr:hover { background: rgba(6, 182, 212, 0.05); }

/* Forms */
.form { display: grid; gap: 1.5rem; }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-label { font-weight: 500; font-size: 0.9375rem; }
.form-input, .form-textarea, .form-select {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  font-size: 1rem;
  color: var(--color-text);
  transition: border-color var(--transition);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary);
}
.form-textarea { min-height: 150px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 640px) { .form-row { grid-template-columns: 1fr 1fr; } }

/* FAQ */
.faq-list { display: grid; gap: 1rem; }
.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  color: var(--color-text-heading);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--color-bg-alt); }
.faq-question::after { content: '+'; font-size: 1.25rem; color: var(--color-primary); transition: transform var(--transition); }
.faq-item.active .faq-question::after { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-answer__inner { padding: 0 1.5rem 1.25rem; color: var(--color-text-muted); }
.faq-item.active .faq-answer { max-height: 500px; }

/* Pricing */
.pricing-cards { display: grid; gap: 2rem; }
@media (min-width: 900px) { .pricing-cards { grid-template-columns: repeat(3, 1fr); } }
.pricing-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  transition: all var(--transition);
}
.pricing-card--featured {
  border-color: var(--color-primary);
  transform: scale(1.02);
}
.pricing-card--featured::before {
  content: 'Most Popular';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  padding: 0.375rem 1rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}
.pricing-card:hover { border-color: var(--color-primary); }
.pricing-card__name { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.5rem; }
.pricing-card__description { color: var(--color-text-muted); font-size: 0.9375rem; margin-bottom: 1.5rem; }
.pricing-card__price { margin-bottom: 1.5rem; }
.pricing-card__amount { font-size: 2.5rem; font-weight: 800; }
.pricing-card__period { color: var(--color-text-muted); font-size: 0.9375rem; }
.pricing-card__features { list-style: none; padding: 0; margin-bottom: 2rem; }
.pricing-card__features li { display: flex; align-items: center; gap: 0.75rem; padding: 0.625rem 0; font-size: 0.9375rem; }
.pricing-card__features li::before { content: '✓'; color: var(--color-success); font-weight: bold; }
.pricing-card .btn { width: 100%; }

/* Footer */
.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
  margin-top: auto;
}
.footer__grid {
  display: grid;
  gap: 3rem;
  margin-bottom: 3rem;
}
@media (min-width: 640px) { .footer__grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }

.footer__brand { max-width: 300px; }
.footer__brand .logo { margin-bottom: 1rem; }
.footer__brand p { color: var(--color-text-muted); font-size: 0.9375rem; }

.footer__heading { font-size: 1rem; font-weight: 600; margin-bottom: 1.25rem; color: var(--color-text-heading); }
.footer__list { list-style: none; padding: 0; margin: 0; }
.footer__list li { margin-bottom: 0.75rem; }
.footer__list a { color: var(--color-text-muted); font-size: 0.9375rem; }
.footer__list a:hover { color: var(--color-primary); }

.footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-align: center;
}
@media (min-width: 768px) {
  .footer__bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}
.footer__copyright { color: var(--color-text-muted); font-size: 0.875rem; }
.footer__legal { display: flex; gap: 1.5rem; }
.footer__legal a { color: var(--color-text-muted); font-size: 0.875rem; }

/* Utilities */
.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-primary);
  color: var(--color-bg);
  padding: 0.75rem 1.5rem;
  z-index: 9999;
  font-weight: 600;
}
.skip-link:focus { top: 0; }

/* Animations */
@media (prefers-reduced-motion: no-preference) {
  .fade-in { animation: fadeIn 0.6s ease forwards; }
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
}