* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

body {
    background-color: rgb(236, 236, 236);
    color: rgb(0, 0, 0);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background: linear-gradient(135deg, rgb(0, 255, 0), rgb(0, 26, 255));
    color: rgb(0, 0, 0);
    text-align: center;
    padding: 40px 20px;
}

header h1 {
    font-size: 50px;
    margin-bottom: 25px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

nav {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
}

nav a {
    color: rgb(255, 255, 255);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    padding: 5px 10px;
    transition: opacity 0.2s, border-bottom 0.2s;
}

nav a:hover {
    opacity: 0.8;
}

nav a.active {
    border-bottom: 2px solid rgb(255, 255, 255);
    opacity: 1;
}

main {
    max-width: 1000px;
    margin: -20px auto 40px auto;
    padding: 0 15px;
    flex: 1;
}

.card {
    background: rgb(255, 255, 255);
    border-radius: 16px;
    padding: 35px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

h2 {
    font-size: 1.8rem;
    color: rgb(34, 34, 34);
    margin-bottom: 20px;
    border-bottom: 2px solid rgb(240, 240, 240);
    padding-bottom: 10px;
}

.meno {
    font-size: 16px;
    color: grey;
    margin-bottom: 20px;
}

table {
    border-collapse: collapse;
    margin: 0 auto;
    width: 100%;
    background-color: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    overflow: hidden;
}

th {
    background-color: rgb(26, 26, 46);
    color: white;
    padding: 10px 8px;
    font-size: 14px;
}

th .cas {
    font-size: 11px;
    font-weight: normal;
    color: white;
}

td {
    padding: 12px 8px;
    border: 1px solid rgb(174, 174, 197);
    font-size: 15px;
    font-weight: bold;
    text-align: center;
}

td.den {
    background-color: rgb(196, 196, 255);
    font-weight: bold;
    color: black;
    font-size: 15px;
    width: 90px;
}

tbody tr:nth-child(odd) {
    background-color: white;
}

tbody tr:nth-child(even) {
    background-color: white;
}

tbody tr:hover {
    background-color: white;
}

td:empty {
    background-color: white;
}

footer {
    background-color: rgb(0, 26, 255);
    color: rgb(255, 255, 255);
    text-align: center;
    padding: 25px 20px;
    font-size: 1rem;
    margin-top: auto;
}

footer p {
    margin-bottom: 8px;
    color: rgb(255, 255, 255);
    text-align: center;
}

footer a {
    color: rgb(255, 255, 255);
    text-decoration: none;
    font-weight: 500;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    header h1 {
        font-size: 2rem;
    }
    nav {
        gap: 15px;
    }
    .card {
        padding: 20px;
    }
    td, th {
        font-size: 12px;
        padding: 6px 4px;
    }
}