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

body {
    font-family: Arial, sans-serif;
    background-color: #1a1a2e;
    color: #ffffff;
    line-height: 1.6;
}

.logo {
    width: 60px;
    height: 60px;
    background-color: #4a90e2;
    border-radius: 50%;
    position: relative;
}

.logo::before {
    content: '★';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 30px;
    color: white;
}

header {
    background-color: #0f0f1e;
    padding: 20px;
    border-bottom: 2px solid #4a90e2;
}

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

.main-menu ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

.main-menu a {
    color: #ffffff;
    text-decoration: none;
    padding: 10px 15px;
}

.main-menu a:hover {
    color: #4a90e2;
}

.main-menu a.active {
    color: #4a90e2;
    background-color: #2a2a3e;
    padding: 10px 15px;
}

.hero {
    background-color: #0a0a1a;
    padding: 60px 20px;
    text-align: center;
}

.hero h1 {
    font-size: 36px;
    color: #4a90e2;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    color: #cccccc;
}

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
}

.content-section {
    background-color: #252540;
    padding: 30px;
    margin-bottom: 20px;
    border: 1px solid #4a90e2;
}

.content-section h1 {
    color: #4a90e2;
    margin-bottom: 20px;
    font-size: 28px;
    text-align: center;
}

.content-section h2 {
    color: #4a90e2;
    margin-bottom: 15px;
    font-size: 24px;
}

.main-article {
    width: 70%;
    float: left;
}

.text-block p {
    margin-bottom: 15px;
    text-align: justify;
    color: #e0e0e0;
}

.image-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
}

.content-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border: 2px solid #4a90e2;
}

.sidebar {
    background-color: #1a1a2e;
    padding: 20px;
    border: 1px solid #4a90e2;
    margin-top: 20px;
    width: 25%;
    float: right;
}

.content-section::after {
    content: "";
    display: table;
    clear: both;
}

.sidebar h3 {
    color: #4a90e2;
    margin-bottom: 15px;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    padding: 8px 0;
    color: #e0e0e0;
    border-bottom: 1px solid #333;
}

.assignments-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.assignment-card {
    background-color: #1a1a2e;
    padding: 20px;
    border: 1px solid #4a90e2;
    flex: 1;
    min-width: 250px;
}

.assignment-card h2 {
    color: #4a90e2;
    margin-bottom: 10px;
    font-size: 20px;
}

.assignment-card p {
    color: #e0e0e0;
    margin-bottom: 15px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #4a90e2;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}

.btn:hover {
    background-color: #357abd;
}

.contact-info {
    background-color: #1a1a2e;
    padding: 20px;
    border: 1px solid #4a90e2;
}

.contact-info p {
    margin-bottom: 10px;
    color: #e0e0e0;
}

.contact-info strong {
    color: #4a90e2;
}

footer {
    background-color: #0f0f1e;
    padding: 30px 20px;
    border-top: 2px solid #4a90e2;
    margin-top: 40px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-section {
    flex: 1;
    min-width: 200px;
}

.footer-section h4 {
    color: #4a90e2;
    margin-bottom: 15px;
}

.footer-section p {
    color: #b0b0b0;
    margin-bottom: 8px;
    font-size: 14px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #b0b0b0;
    text-decoration: none;
}

.footer-section a:hover {
    color: #4a90e2;
}

article ul, article ol {
    margin-left: 30px;
    margin-bottom: 15px;
    color: #e0e0e0;
}

article li {
    margin-bottom: 8px;
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
    }
    
    .main-menu ul {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .content-section {
        padding: 20px;
    }
    
    .main-article {
        width: 100%;
        float: none;
    }
    
    .sidebar {
        width: 100%;
        float: none;
    }
    
    .image-container {
        flex-direction: column;
    }
    
    .content-image {
        max-width: 100%;
    }
    
    .footer-container {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 40px 15px;
    }
    
    .hero h1 {
        font-size: 24px;
    }
    
    main {
        padding: 15px;
    }
    
    .content-section {
        padding: 15px;
    }
    
    .logo {
        width: 50px;
        height: 50px;
    }
    
    .logo::before {
        font-size: 24px;
    }
}