/* ===================================
   VK ВЗЛОМ - ПРЕМИУМ ТЕМНЫЙ ДИЗАЙН
   Кибер-Хакер Эстетика для Яндекс SEO
   =================================== */

/* === CSS ПЕРЕМЕННЫЕ === */
:root {
  /* Цветовая палитра */
  --bg-primary: #0a0e27;
  --bg-secondary: #111633;
  --bg-card: rgba(17, 22, 51, 0.6);
  --bg-card-hover: rgba(17, 22, 51, 0.9);
  
  --accent-primary: #00ff88;
  --accent-secondary: #00d4ff;
  --accent-danger: #ff0055;
  --accent-warning: #ffbb00;
  
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  
  --border-color: rgba(0, 255, 136, 0.2);
  --border-hover: rgba(0, 255, 136, 0.5);
  
  /* Градиенты */
  --gradient-primary: linear-gradient(135deg, #00ff88 0%, #00d4ff 100%);
  --gradient-dark: linear-gradient(180deg, #0a0e27 0%, #111633 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(0, 255, 136, 0.15), transparent 50%);
  
  /* Тени */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.3);
  --shadow-glow-hover: 0 0 30px rgba(0, 255, 136, 0.5);
  
  /* Типографика */
  --font-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Roboto Mono', 'Courier New', monospace;
  
  /* Размеры */
  --container-max: 1200px;
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === ГЛОБАЛЬНЫЕ СТИЛИ === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Matrix Background Effect */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(0, 255, 136, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* === ТИПОГРАФИКА === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-primary);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--accent-primary);
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--accent-secondary);
  text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

/* === LAYOUT === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem;
}

/* === HEADER === */
.header {
  position: sticky;
  top: 0;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  padding: 1.5rem 0;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-primary);
  text-shadow: 0 0 20px rgba(0, 255, 136, 0.5);
}

.nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
}

.nav a:hover {
  color: var(--accent-primary);
}

.nav a:hover::after {
  width: 100%;
}

/* === BUTTONS === */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 1rem;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--bg-primary);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-hover);
  color: var(--bg-primary);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent-primary);
  color: var(--accent-primary);
}

.btn-outline:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.btn-large {
  padding: 1.25rem 3rem;
  font-size: 1.125rem;
}

/* === CARDS === */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  transition: var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === GRID === */
.grid {
  display: grid;
  gap: 2rem;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* === HERO SECTION === */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 3rem 0;
  background: var(--gradient-glow);
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

/* === USP BOXES === */
.usp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.usp-box {
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

.usp-box:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.usp-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.usp-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent-primary);
}

/* === SERVICES === */
.service-card {
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition);
}

.service-card:hover::before {
  transform: scaleX(1);
}

/* === PROCESS STEPS === */
.steps {
  counter-reset: step-counter;
}

.step-item {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  counter-increment: step-counter;
}

.step-number::before {
  content: counter(step-counter);
}

.step-content h3 {
  margin-bottom: 0.5rem;
}

/* === FAQ ACCORDION === */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-question:hover {
  color: var(--accent-primary);
}

.faq-icon {
  transition: var(--transition);
  color: var(--accent-primary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 1.5rem 1.5rem;
  color: var(--text-secondary);
}

/* === REVIEWS === */
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  position: relative;
}

.review-header {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  align-items: center;
}

.review-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--bg-primary);
}

.review-info h4 {
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.review-rating {
  color: var(--accent-warning);
}

.review-text {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === BREADCRUMBS === */
.breadcrumbs {
  padding: 1rem 0;
  font-size: 0.875rem;
}

.breadcrumbs a {
  color: var(--text-muted);
}

.breadcrumbs a:hover {
  color: var(--accent-primary);
}

.breadcrumbs span {
  color: var(--text-muted);
  margin: 0 0.5rem;
}

/* === FOOTER === */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 1.5rem;
  margin-top: 5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-primary);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
  }
  50% {
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.6);
  }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

.glow {
  animation: glow 2s ease-in-out infinite;
}

/* === UTILITIES === */
.text-center {
  text-align: center;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.hidden {
  display: none;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  .nav {
    flex-direction: column;
    gap: 1rem;
  }
  
  .hero {
    min-height: 70vh;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .step-item {
    flex-direction: column;
    gap: 1rem;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .section {
    padding: 3rem 0;
  }
}

/* === PRINT === */
@media print {
  .header,
  .footer,
  .btn,
  .nav {
    display: none;
  }
}