:root {
  --primary-color: #00a3e0;
  --primary-dark: #0088c2;
  --secondary-color: #f8f9fa;
  --text-dark: #333333;
  --text-light: #666666;
  --white: #ffffff;
  --accent-color: #ff6b6b;
  --success-color: #51cf66;
  --border-color: #e0e0e0;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--white);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.section-subtitle {
  font-size: 1.1rem;
  text-align: center;
  color: var(--text-light);
  margin-bottom: 50px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

.btn-accent {
  background-color: var(--accent-color);
  color: var(--white);
}

.btn-accent:hover {
  background-color: #ff5252;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Scroll to top button */
#scrollToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 24px;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 1000;
  transition: var(--transition);
}

#scrollToTop:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
}

#scrollToTop.show {
  display: flex;
}

/* Responsive */
@media (max-width: 768px) {
  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 2rem;
  }

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

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}