/* Базовые переменные */
:root {
  --bg-color: #ffffff;
  --bg-soft: #f6f9fe;
  --text-primary: #222222;
  --text-secondary: #555f6f;
  --accent-color: #106eea;
  --accent-hover: #3284f1;
  --glass-bg: #ffffff;
  --glass-border: #e3ebf7;
  --success-color: #15975b;
  --error-color: #d64343;
  --shadow-soft: 0 8px 24px rgba(16, 110, 234, 0.08);
}

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

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body {
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fbff 42%, #ffffff 100%);
  color: var(--text-primary);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}
.section-title {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  text-align: center;
  color: var(--text-primary);
}
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }
.text-gray { color: var(--text-secondary); }

/* Badge */
.badge {
  display: inline-block;
  padding: 6px 16px;
  background: #eaf3ff;
  color: var(--accent-color);
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid #c9dffd;
}

/* Buttons */
.btn-primary {
  display: inline-block;
  background: var(--accent-color);
  color: #fff;
  padding: 14px 28px; /* Slightly larger */
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid var(--accent-color);
}
.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 10px 24px rgba(16, 110, 234, 0.22);
  transform: translateY(-2px);
}
.btn-secondary {
  display: inline-block;
  background: #ffffff;
  color: var(--text-primary);
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid var(--glass-border);
}
.btn-secondary:hover {
  background: var(--bg-soft);
  border-color: #c9dffd;
  transform: translateY(-2px);
}

/* Header */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  z-index: 100;
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 2px 15px rgba(16, 38, 84, 0.08);
}
.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}
.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--accent-color);
}
.nav-links {
  display: flex;
  gap: 20px;
}
.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color 0.3s;
}
.nav-links a:hover {
  color: var(--accent-color);
}
.navbar .btn-primary {
  white-space: nowrap;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 100px;
  overflow: hidden;
}
.hero-bg-image,
.hero-bg-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-bg-image {
  --parallax-offset: 0px;
  inset: -8%;
  background-image: url("../images/hero-corporate-abstract.png");
  background-size: cover;
  background-position: center;
  opacity: 1;
  transform: translate3d(0, var(--parallax-offset), 0) scale(1.08);
  will-change: transform;
}
.hero-bg-overlay {
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.78) 0%, rgba(255, 255, 255, 0.58) 48%, rgba(255, 255, 255, 0.18) 100%),
    linear-gradient(180deg, rgba(246, 249, 254, 0.04) 0%, rgba(255, 255, 255, 0.46) 78%, var(--bg-color) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
}
.hero-content h1 {
  font-size: 4rem;
  margin-bottom: 24px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.hero .subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}
.hero-bg-glow {
  position: absolute;
  top: 44%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(16, 110, 234, 0.12) 0%, transparent 58%);
  transform: translate(-50%, -50%);
  z-index: 0;
  pointer-events: none;
}

/* Sections */
.section {
  padding: 100px 0;
}
.dark-section {
  background:
    linear-gradient(135deg, rgba(16, 110, 234, 0.05) 0%, rgba(255, 255, 255, 0) 42%),
    linear-gradient(180deg, #f6f9fe 0%, #ffffff 100%);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}

/* Glass Cards */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: 32px;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow-soft);
}
.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 28px rgba(16, 110, 234, 0.14);
  border-color: #c9dffd;
}
.glass-card h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.glass-card p {
  color: var(--text-secondary);
}

/* Grids */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

/* Value Grid */
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.value-card {
  background: #ffffff;
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: 32px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.value-card:hover {
  transform: translateY(-4px);
  border-color: #c9dffd;
  box-shadow: 0 12px 28px rgba(16, 110, 234, 0.14);
}
.value-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.value-card h3 {
  margin-bottom: 16px;
  color: var(--accent-color);
}
.value-card ul {
  list-style: none;
  color: var(--text-secondary);
}
.value-card li {
  margin-bottom: 12px;
  position: relative;
  padding-left: 20px;
}
.value-card li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

/* Tech Layout */
.tech-layout {
  display: flex;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
}
.tech-text {
  flex: 1;
  min-width: 300px;
}
.tech-illustration {
  flex: 1;
  min-width: 300px;
}
.tech-list {
  list-style: none;
}
.tech-list li {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 16px 20px;
  border-radius: 8px;
  margin-bottom: 12px;
  color: var(--text-secondary);
}
.tech-list b {
  color: var(--text-primary);
}

/* Pricing / Comparison */
.pricing-comparison {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}
.comparison-card {
  flex: 1;
  min-width: 300px;
  max-width: 500px;
}
.comparison-card ul {
  list-style: none;
  margin-top: 24px;
}
.comparison-card li {
  margin-bottom: 16px;
  padding-left: 32px;
  position: relative;
  color: var(--text-secondary);
  overflow-wrap: anywhere;
}
.comparison-card.highlight {
  border-color: var(--accent-color);
  box-shadow: 0 12px 28px rgba(16, 110, 234, 0.15);
}
.comparison-card.highlight li {
  color: var(--text-primary);
}
.list-negative li::before {
  content: '✕';
  position: absolute;
  left: 0;
  color: var(--error-color);
  font-weight: bold;
}
.list-positive li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success-color);
  font-weight: bold;
}

/* Docs Grid */
.docs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 40px;
}
.doc-link {
  display: block;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  font-weight: 600;
  transition: all 0.3s ease;
}
.doc-link:hover {
  background: var(--bg-soft);
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}
.doc-link .icon {
  display: block;
  font-size: 2rem;
  margin-bottom: 8px;
}

/* FAQ Accordion */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  margin-bottom: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px;
  cursor: pointer;
  user-select: none;
}
.faq-question h4 {
  margin: 0;
  font-size: 1.1rem;
}
.faq-icon {
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform 0.3s ease;
}
.faq-answer {
  max-height: 0;
  padding: 0 24px;
  background: #f8fbff;
  color: var(--text-secondary);
  transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 24px 24px;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--accent-color);
}
.faq-item.active {
  border-color: var(--accent-color);
}

/* Footer */
.footer {
  background: #f6f9fe;
  padding: 60px 0 40px;
  border-top: 1px solid var(--glass-border);
}
.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
}
.footer h3, .footer h4 {
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer a:hover {
  color: var(--accent-color);
}

/* Animations */
.reveal {
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}
.reveal.active {
  opacity: 1;
  transform: translate(0, 0);
}
.fade-bottom { transform: translateY(40px); }
.fade-left { transform: translateX(-40px); }
.fade-right { transform: translateX(40px); }
.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }
.delay-3 { transition-delay: 0.6s; }

/* Responsive */
@media (max-width: 1120px) {
  .nav-links {
    display: none;
  }

  .hero-content h1 {
    font-size: 3.2rem;
  }
}

@media (max-width: 768px) {
  .hero-content h1 { font-size: 2.3rem; }
  .hero-actions { flex-direction: column; }
  .tech-layout { flex-direction: column; }
  .fade-left,
  .fade-right {
    transform: translateY(32px);
  }
  .hero-bg-image {
    opacity: 0.62;
    background-position: 68% center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }

  .logo-text {
    font-size: 1.25rem;
  }

  .navbar .btn-primary {
    padding: 10px 14px;
    font-size: 0.9rem;
  }

  .hero-content h1 {
    font-size: 1.95rem;
  }

  .tech-text,
  .tech-illustration,
  .comparison-card {
    min-width: 0;
    width: 100%;
  }

  .hero-bg-glow {
    width: 300px;
    height: 300px;
  }

  .hero-bg-image {
    inset: 0;
    transform: translate3d(0, var(--parallax-offset), 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-bg-image {
    transform: scale(1.08);
    will-change: auto;
  }
}