* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html, body {
    height: 100%;
}
body {
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
}
header {
    background: #333;
    color: white;
    padding: 15px 0;
    text-align: center;
}
header h1 {
    margin-bottom: 10px;
}
nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
}
nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}
nav ul li a:hover {
    text-decoration: underline;
}
main {
    flex: 1;
    padding: 20px;
    text-align: center;
}
.glavni {
    display: flex;
    justify-content: center;
    gap: 20px;
    max-width: 1200px;
    margin: 30px auto;
    flex-wrap: wrap;
}
.prvi, .drugi, .treci {
    background: white;
    border-radius: 10px;
    padding: 20px;
    text-align: left;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    flex: 1 1 300px;
    max-width: 350px;
}
h2, h3 {
    margin-bottom: 15px;
}
p {
    margin-bottom: 15px;
    line-height: 1.5;
}
ul {
    padding-left: 20px;
    margin-bottom: 15px;
}
.gumb {
    display: inline-block;
    padding: 10px 20px;
    background: #0077cc;
    color: white;
    text-decoration: none;
    border-radius: 5px;
}
.gumb:hover {
    background: #005fa3;
}
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 15px 0;
    margin-top: auto;
}