:root {
  --bg-main: #050b16;
  --bg-card: #0b1424;
  --bg-card-hover: #111f35;
  --bg-input: #0d1829;
  --accent: #00aeef;
  --accent-light: #58cfff;
  --accent-dark: #0094ca;
  --text-main: #ffffff;
  --text-muted: #9eb3c9;
  --border-color: rgba(255,255,255,0.08);
  --shadow-main: 0 0 30px rgba(0,174,239,0.15);
  --shadow-hover: 0 20px 40px rgba(0,174,239,0.2);
  --radius: 20px;
  --radius-sm: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  background: var(--bg-main);
  color: var(--text-main);
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 11, 22, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.logo {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.logo-title {
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.2;
  color: var(--text-main);
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--accent);
  line-height: 1.2;
}

.nav-link {
  color: #fff !important;
  opacity: 0.85;
  padding: 0.5rem 1rem !important;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1rem;
  right: 1rem;
  height: 2px;
  background: var(--accent-light);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-link:hover,
.nav-link.active {
  opacity: 1;
  color: var(--accent-light) !important;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.navbar-toggler {
  border: 1px solid rgba(255,255,255,0.2);
  padding: 0.5rem 0.75rem;
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.85%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Buttons */
.btn-primary {
  background: var(--accent);
  border: none;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  box-shadow: 0 4px 15px rgba(0,174,239,0.3);
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,174,239,0.4);
  color: #fff;
}

.btn-outline-light {
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-sm);
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  transition: all var(--transition);
}

.btn-outline-light:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.6);
  color: #fff;
  transform: translateY(-2px);
}

/* Hero */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 70% 40%, rgba(0,174,239,0.15) 0%, transparent 50%),
    radial-gradient(circle at 30% 80%, rgba(88,207,255,0.08) 0%, transparent 40%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,174,239,0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: 0.875rem;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 1rem 0 1.25rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  margin-bottom: 1.25rem;
  font-weight: 500;
}

.hero-text {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-image {
  width: 100%;
  max-width: 460px;
  filter: drop-shadow(0 0 20px rgba(0,174,239,0.4)) drop-shadow(0 0 60px rgba(0,174,239,0.25));
  animation: float 6s ease-in-out infinite;
  position: relative;
  z-index: 1;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

/* Sections */
.section {
  padding: 100px 0;
  position: relative;
}

.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 3.5rem;
  letter-spacing: -0.02em;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  margin: 1rem auto 0;
  border-radius: 2px;
}

.section-services {
  background: linear-gradient(180deg, var(--bg-main) 0%, rgba(0,174,239,0.02) 50%, var(--bg-main) 100%);
}

.section-workflow {
  background: var(--bg-main);
}

.section-advantages {
  background: linear-gradient(180deg, rgba(0,174,239,0.02) 0%, var(--bg-main) 100%);
}

.section-experience {
  background: var(--bg-main);
}

.section-about {
  background: linear-gradient(180deg, var(--bg-main) 0%, rgba(0,174,239,0.03) 100%);
}

.section-results {
  background: var(--bg-main);
}

.section-contacts {
  background: linear-gradient(180deg, rgba(0,174,239,0.03) 0%, var(--bg-main) 100%);
}

/* Cards */
.service-card,
.case-card,
.advantage-card,
.workflow-card,
.about-box,
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  height: 100%;
  transition: all var(--transition);
}

.service-card,
.case-card,
.advantage-card,
.workflow-card {
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.service-card::before,
.case-card::before,
.advantage-card::before,
.workflow-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.service-card:hover::before,
.case-card:hover::before,
.advantage-card:hover::before,
.workflow-card:hover::before {
  transform: scaleX(1);
}

.service-card:hover,
.case-card:hover,
.advantage-card:hover,
.workflow-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  background: var(--bg-card-hover);
  border-color: rgba(0,174,239,0.2);
}

.service-card h3,
.case-card h3,
.advantage-card h3,
.workflow-card h3 {
  font-weight: 700;
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.service-card p,
.case-card p,
.advantage-card p,
.workflow-card p {
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
  font-size: 0.95rem;
}

.service-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.service-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent-light);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition);
}

.service-link:hover {
  color: var(--accent-light);
  transform: translateX(4px);
}

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

.workflow-number {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.workflow-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.advantage-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

/* About */
.about-box {
  padding: 3rem;
}

.about-box p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.about-box .lead {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-main);
}

.about-stats {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.stat-item {
  background: #0d1829;
  padding: 1.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

.stat-item:hover {
  border-color: rgba(0,174,239,0.3);
  box-shadow: var(--shadow-main);
}

.stat-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

/* Contact form */
.contact-form {
  padding: 2.5rem;
}

.form-label {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-control {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  transition: all var(--transition);
}

.form-control:focus {
  background: var(--bg-input);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,174,239,0.15);
  outline: none;
}

.form-control::placeholder {
  color: rgba(158,179,201,0.6);
}

.form-control.is-invalid {
  border-color: #ef4444;
}

/* Footer */
.footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border-color);
  margin-top: 60px;
  background: rgba(5,11,22,0.6);
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent-light);
}

.footer-contacts a {
  transition: color var(--transition);
}

.footer-contacts a:hover {
  color: var(--accent-light) !important;
}

/* Scroll animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 991px) {
  .hero {
    text-align: center;
    padding-top: 80px;
    min-height: auto;
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-text {
    margin: 0 auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    margin-top: 3rem;
    max-width: 320px;
  }

  .navbar-collapse {
    padding: 1rem 0;
    background: rgba(5,11,22,0.98);
    border-radius: 0 0 var(--radius) var(--radius);
    margin-top: 0.5rem;
    border: 1px solid var(--border-color);
    border-top: none;
  }

  .nav-link {
    padding: 0.75rem 1rem !important;
    text-align: center;
  }

  .nav-link::after {
    display: none;
  }

  .btn.ms-lg-3 {
    margin-left: 0 !important;
    width: 100%;
    text-align: center;
  }

  .section {
    padding: 70px 0;
  }

  .about-box {
    padding: 2rem;
  }
}

@media (max-width: 576px) {
  .hero {
    padding-top: 60px;
    min-height: auto;
  }

  .hero-title {
    font-size: 1.9rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.6rem;
    margin-bottom: 2.5rem;
  }

  .service-card,
  .case-card,
  .advantage-card,
  .workflow-card {
    padding: 1.5rem;
  }

  .contact-form {
    padding: 1.5rem;
  }

  .about-box {
    padding: 1.5rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .hero-buttons .btn {
    width: 100%;
    max-width: 280px;
  }
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.contact-link {
  color: #ffffff;
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition);
}
.contact-link:hover {
  color: var(--accent-light);
}

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  background: #ffffff;
  color: #050b16;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-main);
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateX(120%);
  opacity: 0;
  min-width: 280px;
  font-weight: 500;
}
.toast.show {
  transform: translateX(0);
  opacity: 1;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.toast-success {
  border-left: 4px solid #28a745;
}
.toast-error {
  border-left: 4px solid #dc3545;
}
.toast-close {
  margin-left: auto;
  background: none;
  border: none;
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  color: #9eb3c9;
  padding: 0;
}
.toast-close:hover {
  color: #050b16;
}
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(11, 20, 36, 0.95);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1rem 0;
  transform: translateY(100%);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  z-index: 10000;
  backdrop-filter: blur(10px);
}
.cookie-banner.show {
  transform: translateY(0);
  opacity: 1;
}
.cookie-banner .btn {
  min-width: 120px;
}