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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Typography */
h1, h2, h3, h4 {
  margin-bottom: 15px;
  color: #2c3e50;
}

p {
  margin-bottom: 20px;
}

a {
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header & Navigation */
header {
  background-color: #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  padding: 15px 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: #3498db;
  margin: 0;
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 20px;
}

nav ul li a {
  color: #2c3e50;
  font-weight: 500;
}

nav ul li a.active {
  color: #3498db;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 8px 16px;
  background-color: #f1f1f1;
  color: #333;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn:hover {
  background-color: #e4e4e4;
  text-decoration: none;
}

.btn-primary {
  background-color: #3498db;
  color: white;
}

.btn-primary:hover {
  background-color: #2980b9;
}

/* Hero Section */
.hero {
  background-color: #3498db;
  color: white;
  padding: 80px 0;
  text-align: center;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: white;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto 30px;
}

/* Features Section */
.features {
  padding: 60px 0;
}

.features .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  grid-gap: 30px;
}

.feature-card {
  background-color: #fff;
  border-radius: 8px;
  padding: 30px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

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

/* Forms */
.form-container {
  padding: 60px 0;
}

.form-container form {
  background-color: #fff;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  max-width: 500px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

#message {
  margin-top: 20px;
  padding: 10px;
  border-radius: 4px;
  text-align: center;
}

.error-message {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.success-message {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

/* Footer */
footer {
  background-color: #2c3e50;
  color: #ecf0f1;
  padding: 20px 0;
  text-align: center;
  margin-top: 60px;
}

/* Responsive */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
  }
  
  nav ul {
    margin-top: 15px;
  }
  
  nav ul li {
    margin: 0 10px;
  }
}