/* 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: #f4f4f4;
}

/* Header styles */
header {
    background-color: #2c3e50;
    color: #fff;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

header h1 {
    text-align: center;
    margin-bottom: 1rem;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    display: block;
    transition: background-color 0.3s;
}

nav ul li a:hover {
    background-color: #34495e;
    border-radius: 4px;
}

/* Main content */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.section {
    background-color: #fff;
    margin-bottom: 2rem;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.section h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid #3498db;
}

.section h3 {
    color: #34495e;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

/* Info section grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.info-item {
    padding: 1rem;
    background-color: #ecf0f1;
    border-radius: 4px;
    border-left: 4px solid #3498db;
}

.info-item h3 {
    margin-top: 0;
    color: #2c3e50;
    font-size: 1rem;
}

.info-item p {
    color: #555;
    font-weight: 500;
}

/* Zadanie section */
.zadanie-content {
    line-height: 1.8;
}

.zadanie-content p {
    margin-bottom: 1rem;
}

/* Zdroje section */
.zdroje-content ul {
    list-style-position: inside;
    margin-left: 1rem;
}

.zdroje-content li {
    margin-bottom: 0.5rem;
}

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

.zdroje-content a:hover {
    text-decoration: underline;
}

/* Materialy section */
.materialy-content ul {
    list-style-position: inside;
    margin-left: 1rem;
}

.materialy-content li {
    margin-bottom: 0.5rem;
}

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

.materialy-content a:hover {
    text-decoration: underline;
}

.screenshots {
    margin-top: 1rem;
    padding: 1rem;
    background-color: #ecf0f1;
    border-radius: 4px;
}

/* Dennik section */
.dennik-entry {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-left: 4px solid #3498db;
    border-radius: 4px;
}

.dennik-entry h3 {
    margin-top: 0;
    color: #2c3e50;
}

.dennik-entry p {
    color: #555;
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

/* Responsive design */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav ul li {
        margin: 0.5rem 0;
    }
    
    .section {
        padding: 1rem;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}