/* Global Styles */
:root {
  --primary-color: #2563eb;
  --secondary-color: #1e40af;
  --background: #f9fafb;
  --accent: #8b5cf6;
  --text-dark: #111827;
  --text-light: #f9fafb;
}

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

body {
  font-family: 'Helvetica Neue', sans-serif;
  background: var(--background);
  color: var(--text-dark);
  line-height: 1.6;
  min-height: 100vh;
}

/* Header Styles */
header {
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  padding: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

header nav a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

header nav a:hover {
  color: var(--accent);
  text-shadow: 0 0 5px rgba(0,0,0,0.2);
}

/* Hero Section */
.hero {
  padding: 6rem 2rem;
  text-align: center;
  background: linear-gradient(145deg, #ffffff, #e0e7ff);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  background: -webkit-linear-gradient(var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Card Styles */
.card {
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  margin: 2rem auto;
  max-width: 800px;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-5px);
}

/* Button Styles */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--primary-color);
  color: white;
  border-radius: 0.5rem;
  text-decoration: none;
  margin-top: 1.5rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn:hover {
  background: var(--secondary-color);
  box-shadow: 0 6px 8px rgba(0,0,0,0.15);
  transform: scale(1.05);
}

/* Footer Styles */
footer {
  background: #111827;
  color: #d1d5db;
  padding: 3rem 2rem;
  text-align: center;
}

footer a {
  color: #9ca3af;
  text-decoration: none;
  transition: color 0.3s;
}

footer a:hover {
  color: var(--accent);
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }

  header nav {
    flex-direction: column;
  }
}