body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
}

header {
    background-color: #1a2a3a;
    padding: 60px 0 30px 0;
    color: white;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 40px;
    font-weight: bold;
    letter-spacing: 1px;
}

header nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    gap: 40px;
}

header nav ul li a {
    color: #ffffff;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
    padding-bottom: 8px;
    transition: all 0.3s ease;
}

header nav ul li a.active {
    border-bottom: 3px solid #3498db;
}

header nav ul li a:hover {
    color: #3498db;
}

main {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border-radius: 8px;
}

h1, h2, h3 {
    color: #2c3e50;
}

.slika-kontejner {
    text-align: center;
    margin: 20px 0;
}

.slika-kontejner img {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

table, th, td {
    border: 1px solid #bdc3c7;
}

th, td {
    padding: 12px;
    text-align: left;
}

th {
    background-color: #ecf0f1;
    color: #2c3e50;
}

tr:nth-child(even) {
    background-color: #f9f9f9;
}

.algoritam-sekcija {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.primer {
    background-color: #e8f4fd;
    border-left: 5px solid #3498db;
    padding: 15px;
    margin: 15px 0;
    font-family: 'Courier New', Courier, monospace;
}

form {
    background: #fdfdfd;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

input, textarea {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    background-color: #3498db;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

button:hover {
    background-color: #2980b9;
}

footer {
    text-align: center;
    padding: 20px;
    background: #2c3e50;
    color: white;
    margin-top: 40px;
}