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

:root {
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --secondary: #06b6d4;
  --accent: #14b8a6;
  --dark: #0f172a;
  --dark-lighter: #1e293b;
  --dark-card: #1a2332;
  --gray: #64748b;
  --gray-light: #cbd5e1;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --white: #ffffff;
  --spacing: 8px;
  --border-radius: 12px;
  --transition: 0.3s ease;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--dark);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

.hidden {
  display: none !important;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: calc(var(--spacing) * 2) 0;
  z-index: 100;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing) * 3);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 1.5);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  animation: logoFloat 3s ease-in-out infinite;
}

.logo-icon::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background: var(--white);
  border-radius: 4px;
  animation: logoRotate 4s linear infinite;
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

@keyframes logoRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing) * 3);
}

.nav-links a {
  color: var(--gray-light);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--white);
}

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

.btn {
  padding: calc(var(--spacing) * 1.5) calc(var(--spacing) * 3);
  border-radius: var(--border-radius);
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1rem;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--white);
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(14, 165, 233, 0.4);
}

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

.btn-outline:hover {
  background: var(--primary);
  transform: translateY(-2px);
}

.btn-large {
  padding: calc(var(--spacing) * 2) calc(var(--spacing) * 4);
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.particle-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

#particles {
  width: 100%;
  height: 100%;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--spacing) * 10) calc(var(--spacing) * 3);
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 1200px;
  text-align: center;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  margin-bottom: calc(var(--spacing) * 3);
  line-height: 1.2;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { filter: hue-rotate(0deg); }
  50% { filter: hue-rotate(20deg); }
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--gray-light);
  margin-bottom: calc(var(--spacing) * 5);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: calc(var(--spacing) * 2);
  justify-content: center;
  margin-bottom: calc(var(--spacing) * 8);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: calc(var(--spacing) * 6);
  justify-content: center;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--gray-light);
  font-size: 1rem;
  margin-top: calc(var(--spacing));
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing) * 3);
}

.services-section,
.about-section {
  padding: calc(var(--spacing) * 12) 0;
  position: relative;
  z-index: 1;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: calc(var(--spacing) * 2);
}

.section-subtitle {
  text-align: center;
  color: var(--gray-light);
  font-size: 1.2rem;
  margin-bottom: calc(var(--spacing) * 8);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: calc(var(--spacing) * 3);
  margin-bottom: calc(var(--spacing) * 10);
}

.service-category {
  background: var(--dark-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing) * 4);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

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

.service-category:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 8px 32px rgba(14, 165, 233, 0.2);
}

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

.category-icon {
  font-size: 3rem;
  margin-bottom: calc(var(--spacing) * 2);
}

.service-category h3 {
  font-size: 1.5rem;
  margin-bottom: calc(var(--spacing) * 2);
}

.service-category ul {
  list-style: none;
}

.service-category li {
  padding: calc(var(--spacing)) 0;
  color: var(--gray-light);
  position: relative;
  padding-left: calc(var(--spacing) * 3);
}

.service-category li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.cta-banner {
  background: linear-gradient(135deg, var(--dark-lighter), var(--dark-card));
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing) * 6);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
  animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
}

.cta-banner h3 {
  font-size: 2rem;
  margin-bottom: calc(var(--spacing) * 2);
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: var(--gray-light);
  margin-bottom: calc(var(--spacing) * 3);
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: calc(var(--spacing) * 4);
}

.feature {
  text-align: center;
  padding: calc(var(--spacing) * 4);
}

.feature-icon {
  font-size: 4rem;
  margin-bottom: calc(var(--spacing) * 2);
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

.feature:nth-child(2) .feature-icon {
  animation-delay: 0.5s;
}

.feature:nth-child(3) .feature-icon {
  animation-delay: 1s;
}

.feature:nth-child(4) .feature-icon {
  animation-delay: 1.5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.feature h3 {
  font-size: 1.5rem;
  margin-bottom: calc(var(--spacing) * 2);
}

.feature p {
  color: var(--gray-light);
  line-height: 1.8;
}

.footer {
  background: var(--dark-lighter);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: calc(var(--spacing) * 8) 0 calc(var(--spacing) * 4) 0;
  position: relative;
  z-index: 1;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: calc(var(--spacing) * 6);
  margin-bottom: calc(var(--spacing) * 6);
}

.footer-brand p {
  color: var(--gray-light);
  margin-top: calc(var(--spacing) * 2);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: calc(var(--spacing) * 4);
}

.footer-links h4 {
  margin-bottom: calc(var(--spacing) * 2);
}

.footer-links a {
  display: block;
  color: var(--gray-light);
  text-decoration: none;
  margin-bottom: calc(var(--spacing));
  transition: color var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: calc(var(--spacing) * 4);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--gray);
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--dark-lighter);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing) * 6);
  max-width: 450px;
  width: 90%;
  position: relative;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(30px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: calc(var(--spacing) * 2);
  right: calc(var(--spacing) * 2);
  background: none;
  border: none;
  color: var(--gray-light);
  font-size: 2rem;
  cursor: pointer;
  transition: color var(--transition);
}

.modal-close:hover {
  color: var(--white);
}

.auth-form h2 {
  font-size: 2rem;
  margin-bottom: calc(var(--spacing));
  text-align: center;
}

.auth-subtitle {
  text-align: center;
  color: var(--gray-light);
  margin-bottom: calc(var(--spacing) * 4);
}

.form-group {
  margin-bottom: calc(var(--spacing) * 3);
}

.form-group label {
  display: block;
  margin-bottom: calc(var(--spacing));
  font-weight: 500;
  color: var(--gray-light);
}

.form-group input {
  width: 100%;
  padding: calc(var(--spacing) * 1.5);
  background: var(--dark);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: calc(var(--border-radius) / 2);
  color: var(--white);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
}

.auth-form .btn {
  width: 100%;
  margin-top: calc(var(--spacing) * 2);
}

.auth-switch {
  text-align: center;
  margin-top: calc(var(--spacing) * 3);
  color: var(--gray-light);
}

.auth-switch a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.auth-switch a:hover {
  text-decoration: underline;
}

.admin-container {
  display: grid;
  grid-template-columns: 250px 1fr 350px;
  min-height: calc(100vh - 80px);
  margin-top: 80px;
}

.admin-sidebar {
  background: var(--dark-lighter);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  padding: calc(var(--spacing) * 3);
}

.sidebar-section h3 {
  font-size: 1.2rem;
  margin-bottom: calc(var(--spacing) * 2);
  color: var(--gray-light);
}

.category-filter {
  display: block;
  width: 100%;
  padding: calc(var(--spacing) * 1.5);
  background: transparent;
  border: none;
  color: var(--gray-light);
  text-align: left;
  cursor: pointer;
  border-radius: calc(var(--border-radius) / 2);
  transition: all var(--transition);
  font-size: 0.95rem;
  margin-bottom: calc(var(--spacing));
}

.category-filter:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--white);
}

.category-filter.active {
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
}

.admin-main {
  padding: calc(var(--spacing) * 4);
  overflow-y: auto;
}

.admin-header {
  margin-bottom: calc(var(--spacing) * 4);
}

.admin-header h1 {
  font-size: 2.5rem;
  margin-bottom: calc(var(--spacing));
}

.admin-header p {
  color: var(--gray-light);
  font-size: 1.1rem;
}

.services-catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: calc(var(--spacing) * 3);
}

.service-card {
  background: var(--dark-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing) * 3);
  transition: all var(--transition);
}

.service-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.2);
}

.service-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: calc(var(--spacing) * 2);
}

.service-name {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: calc(var(--spacing) / 2);
}

.service-category-badge {
  display: inline-block;
  padding: calc(var(--spacing) / 2) calc(var(--spacing) * 1.5);
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.service-description {
  color: var(--gray-light);
  margin-bottom: calc(var(--spacing) * 2);
  line-height: 1.6;
  font-size: 0.95rem;
}

.service-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.service-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.service-provider {
  display: flex;
  align-items: center;
  gap: calc(var(--spacing));
  margin-top: calc(var(--spacing));
  padding-top: calc(var(--spacing));
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.85rem;
  color: var(--gray);
}

.add-to-cart {
  padding: calc(var(--spacing)) calc(var(--spacing) * 2);
  font-size: 0.9rem;
}

.cart-sidebar {
  background: var(--dark-lighter);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding: calc(var(--spacing) * 3);
  display: flex;
  flex-direction: column;
}

.cart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: calc(var(--spacing) * 3);
  padding-bottom: calc(var(--spacing) * 2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cart-header h3 {
  font-size: 1.5rem;
}

.cart-badge {
  background: var(--primary);
  color: var(--white);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 600;
}

.cart-items {
  flex: 1;
  overflow-y: auto;
  margin-bottom: calc(var(--spacing) * 3);
}

.empty-cart {
  text-align: center;
  padding: calc(var(--spacing) * 6) 0;
  color: var(--gray);
}

.empty-cart-subtitle {
  font-size: 0.9rem;
  margin-top: calc(var(--spacing));
}

.cart-item {
  background: var(--dark);
  border-radius: calc(var(--border-radius) / 2);
  padding: calc(var(--spacing) * 2);
  margin-bottom: calc(var(--spacing) * 2);
  position: relative;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from { transform: translateX(20px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.cart-item-name {
  font-weight: 600;
  margin-bottom: calc(var(--spacing) / 2);
  padding-right: calc(var(--spacing) * 3);
}

.cart-item-price {
  color: var(--accent);
  font-weight: 600;
}

.remove-from-cart {
  position: absolute;
  top: calc(var(--spacing) * 2);
  right: calc(var(--spacing) * 2);
  background: rgba(239, 68, 68, 0.2);
  border: none;
  color: var(--error);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.remove-from-cart:hover {
  background: var(--error);
  color: var(--white);
}

.cart-footer {
  padding-top: calc(var(--spacing) * 3);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.cart-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: calc(var(--spacing) * 3);
}

.cart-total span:last-child {
  color: var(--accent);
}

.ai-avatar {
  position: fixed;
  bottom: calc(var(--spacing) * 4);
  right: calc(var(--spacing) * 4);
  z-index: 999;
  cursor: pointer;
}

.avatar-circle {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.4);
  animation: avatarFloat 3s ease-in-out infinite;
}

@keyframes avatarFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.avatar-pulse {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.5); opacity: 0; }
}

.avatar-icon {
  font-size: 2rem;
  z-index: 1;
}

.avatar-tooltip {
  position: absolute;
  bottom: 100%;
  right: 0;
  background: var(--dark-lighter);
  padding: calc(var(--spacing)) calc(var(--spacing) * 2);
  border-radius: calc(var(--border-radius) / 2);
  white-space: nowrap;
  margin-bottom: calc(var(--spacing));
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.ai-avatar:hover .avatar-tooltip {
  opacity: 1;
}

.notification {
  position: fixed;
  top: calc(var(--spacing) * 10);
  right: calc(var(--spacing) * 3);
  background: var(--dark-lighter);
  border: 1px solid var(--primary);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing) * 2) calc(var(--spacing) * 3);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  z-index: 9999;
  animation: slideInRight 0.3s ease;
  max-width: 400px;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.notification.success {
  border-color: var(--success);
}

.notification.error {
  border-color: var(--error);
}

.user-info {
  color: var(--gray-light);
  font-size: 0.95rem;
}

@media (max-width: 1200px) {
  .admin-container {
    grid-template-columns: 220px 1fr 300px;
  }
}

@media (max-width: 968px) {
  .admin-container {
    grid-template-columns: 1fr;
  }

  .admin-sidebar,
  .cart-sidebar {
    display: none;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }

  .services-catalog {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .nav-links {
    gap: calc(var(--spacing) * 2);
  }

  .nav-links a {
    display: none;
  }
}