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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header Styles */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

header h1 {
    color: #007bff;
    font-size: 1.8rem;
}

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

nav ul li {
    margin-left: 25px;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #007bff;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('bj.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    text-align: center;
    padding: 100px 0;
}

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

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
}

/* Main Content */
main {
    padding: 50px 0;
}

.content {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 40px;
    margin-bottom: 30px;
}

.content h2 {
    color: #007bff;
    margin-bottom: 20px;
    font-size: 2rem;
}

/* Section Icons */
.section-icon {
    width: 32px;
    height: 32px;
    vertical-align: middle;
    margin-right: 10px;
}

.content h3 {
    color: #0056b3;
    margin: 25px 0 15px;
    font-size: 1.5rem;
}

.content p {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.content ul {
    margin-left: 20px;
    margin-bottom: 20px;
}

.content ul li {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

/* Highlights Section */
.highlights {
    background-color: #e9f4ff;
    border-left: 5px solid #007bff;
    padding: 20px;
    margin: 30px 0;
}

.highlights h3 {
    margin-top: 0;
}

.highlights ul {
    margin-left: 20px;
}

.highlights ul li {
    margin-bottom: 10px;
}

/* Certificates Section */
.certificates {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.certificate {
    background-color: #f8f9fa;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
}

.certificate h3 {
    color: #007bff;
    margin-bottom: 10px;
}

/* Footer */
footer {
    background-color: #343a40;
    color: #fff;
    text-align: center;
    padding: 25px 0;
    margin-top: 50px;
}

/* Responsive Design */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 20px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 5px 10px;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .content {
        padding: 25px;
    }
    
    .certificates {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        width: 95%;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .hero h2 {
        font-size: 1.7rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .content h2 {
        font-size: 1.7rem;
    }
    
    .content h3 {
        font-size: 1.3rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}