/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Navigation styles */
.navbar {
    background-color: #2c3e50;
    padding: 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    color: #ecf0f1;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    padding: 15px 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0;
}

.nav-link {
    display: block;
    color: #bdc3c7;
    text-decoration: none;
    padding: 20px 25px;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.nav-link:hover,
.nav-link.active {
    color: #ecf0f1;
    background-color: #34495e;
    border-bottom-color: #3498db;
}

/* Main content styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.main-content {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin: 20px 0;
    overflow: hidden;
}

.content-section {
    padding: 40px;
}

/* Typography */
h1 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-align: center;
}

h2 {
    color: #34495e;
    font-size: 1.8rem;
    margin-bottom: 15px;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

h3 {
    color: #34495e;
    font-size: 1.3rem;
    margin-bottom: 10px;
}

p {
    margin-bottom: 15px;
    text-align: justify;
}

/* Hero section */
.hero {
    background: linear-gradient(135deg, #3498db, #2c3e50);
    color: white;
    text-align: center;
    padding: 60px 40px;
}

.hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

/* Feature grid */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.feature-card {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    border-left: 4px solid #3498db;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-secondary {
    background-color: #95a5a6;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

/* Footer */
.footer {
    background-color: #2c3e50;
    color: #bdc3c7;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}

/* Responsive design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: 10px;
    }
    
    .nav-menu {
        width: 100%;
        justify-content: center;
    }
    
    .nav-link {
        padding: 15px 20px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .content-section {
        padding: 20px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}

/* Utility classes */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}