/* belso valtozok */
:root {
    --primary-color: #1a365d;
    --secondary-color: #ffffff;
    --accent-color: #2b6cb0;
    --text-color: #2d3748;
    --background-color: #f7fafc;
}

/* alapra allitas */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    text-align: left;
}

a:link {
    color: var(--text-color);
    text-decoration: underline;
}

a:visited {
    color: var(--accent-color);
    text-decoration: underline;
}

/* Navigacios menu */
.navbar { background-color: var(--primary-color); }
.nav-link {
    color: var(--secondary-color) !important;
    text-decoration: underline !important;
    padding: 0.5rem 1rem !important;
    transition: background-color 0.3s ease;
}
.nav-link.active { font-weight: bold; }
.nav-link:hover { background-color: var(--accent-color); }

/* main */
main {
    max-width: 1200px;
    margin: 2rem auto 0;
    padding: 2rem 1rem;
    background-color: var(--background-color);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2rem auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.col-12 img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 300px;
    margin: 0;
}

/* footer */
footer {
    background-color: var(--primary-color);
    color: var(--secondary-color);
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 3rem;
}

footer a {
    color: var(--secondary-color) !important;
    text-decoration: underline;
}

footer a:hover { opacity: 0.8; }

footer a:visited {
    color: rgb(115, 118, 121);
    text-decoration: underline;
}

/* responsivity */

@media screen and (max-width: 991px) {
    header h1 { font-size: 2.2rem; }
    header h2 { font-size: 1.8rem; }
    h3 { font-size: 1.5rem; }
}

@media screen and (max-width: 768px) {
    header h1 { font-size: 2rem; }
    header h2 { font-size: 1.5rem; }
    h3 { font-size: 1.3rem; }
    main { padding: 1rem; }
    
    .navbar-collapse {
        background-color: var(--background-color);
        padding: 1rem;
        border-radius: 8px;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }
    
    .nav-link {
        color: var(--primary-color) !important;
        padding: 0.75rem 1rem !important;
        border-radius: 4px;
    }
    
    .nav-link.active { color: var(--primary-color) !important; }
    .nav-link:hover { background-color: rgba(43, 108, 176, 0.1); }
    .col-12 img { min-height: 500px; }
}

@media screen and (max-width: 480px) {
    header {
        padding: 2rem 1rem;
    }
    header h1 { font-size: 1.8rem; }
    header h2 { font-size: 1.3rem; }
    ol { padding-left: 0; }
}

/* Java script*/
.font-sizer {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    background-color: var(--accent-color);
    color: var(--secondary-color);
    border: none;
    border-radius: 4px;
    padding: 8px 12px;
    cursor: pointer;
    font-weight: bold;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.font-sizer:hover {
    opacity: 0.9;
}