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

:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --text-color: #333;
  --text-secondary: #666;
  --text-light: #888;
  --bg-color: #f5f7fa;
  --card-bg: white;
  --border-color: #e8e8e8;
  --highlight-bg: rgba(102, 126, 234, 0.1);
  --highlight-color: #667eea;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--bg-color);
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title .icon {
  font-size: 1.5rem;
}

.section-desc {
  color: var(--text-secondary);
  margin-bottom: 40px;
  font-size: 1.05rem;
}

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

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

.animate-slide-down {
  animation: slideDown 0.5s ease-out forwards;
}

.animate-slide-up {
  animation: slideUp 0.6s ease-out forwards;
}

.animate-scale-in {
  animation: scaleIn 0.5s ease-out forwards;
}

.animate-initial {
  opacity: 0;
}

.animate-delay-1 {
  animation-delay: 0.1s;
}

.animate-delay-2 {
  animation-delay: 0.2s;
}

.animate-delay-3 {
  animation-delay: 0.3s;
}

.animate-delay-4 {
  animation-delay: 0.4s;
}

.animate-delay-5 {
  animation-delay: 0.5s;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .animate-initial {
    opacity: 1;
  }
}

.page-loading {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 9999;
  transition: opacity 0.3s ease-out;
}

.page-loading.loaded {
  opacity: 0;
  pointer-events: none;
}

.page-loading-text {
  color: white;
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: 2px;
}

.page-loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.page-loading-tip {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  text-align: center;
  line-height: 1.6;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

body:not(.page-ready) es-navbar,
body:not(.page-ready) es-hero,
body:not(.page-ready) .sections-container,
body:not(.page-ready) es-contact,
body:not(.page-ready) es-footer {
  opacity: 0;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.5rem;
  }
}