:root {
  --primary: #1E88E5;
  --secondary: #FFFFFF;
  --background: #F5F7FA;
  --footer-bg: #1E88E5;
  --button: #1E88E5;
  --section-bg-1: #E3F2FD;
  --section-bg-2: #FFFFFF;
  --section-bg-3: #F5F7FA;
  --text-primary: #212121;
  --text-secondary: #757575;
  --success: #4CAF50;
  --error: #F44336;
  --border-radius: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
  font-family: 'Roboto', 'Open Sans', sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.7;
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-top: 0;
  color: var(--primary);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.5px;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

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

a:hover {
  color: #1565C0;
  text-decoration: underline;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-bg-1 {
  background-color: var(--section-bg-1);
}

.section-bg-2 {
  background-color: var(--section-bg-2);
}

.section-bg-3 {
  background-color: var(--section-bg-3);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--button);
  color: var(--secondary);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: #1565C0;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

/* Cards */
.card {
  background-color: var(--secondary);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 1.5rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #e0e0e0;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.2);
}

/* Navigation */
.navbar {
  background-color: var(--secondary);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
}

.nav-link {
  padding: 0.5rem 1rem;
  font-weight: 500;
}

.nav-link:hover {
  color: var(--primary);
  text-decoration: none;
}

/* Footer */
.footer {
  background-color: var(--footer-bg);
  color: var(--secondary);
  padding: 3rem 0;
}

.footer a {
  color: var(--secondary);
  opacity: 0.8;
}

.footer a:hover {
  opacity: 1;
  text-decoration: none;
}

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

.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .section {
    padding: 3rem 0;
  }
}