/*styl */
html {
    background-color: #ffffff;
}

body {
    color: #1a1a1a;           
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    line-height: 1.6;
}

/*navbar*/
header {
    width: 100%;
    background-color: #1a1a1a; 
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid #e1f5fe;
}

nav {
    display: flex;
    justify-content: center;
    gap: 40px;
}


nav a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

nav a:hover { color: #b3e5fc; }

/*uprava obsahu*/
main {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
    text-align: center; 
}

section {
    margin-bottom: 60px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

section:last-child { border-bottom: none; }

h1, h2 {
    color: #000000;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-top: 50px;
}

h2::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background-color: #81d4fa; 
    margin: 10px auto 0;
}

p {
    text-align: center;
    width: 100%;
    margin: 20px auto;
}

/*obrazky a fancy galeria*/
li img, section img {
    display: block;
    margin: 20px auto; 
    max-width: 80%;
    max-height: 500px;
    height: auto;
    border: 1px solid #eee;
}
ul {
    list-style-type: none; 
    padding: 0;
    margin: 0 auto;
    text-align: center;
}

li {
    margin-bottom: 15px; 
    text-align: center;
    width: 100%;
}

.obrazky {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 20px 0;
}

.obrazok img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    filter: grayscale(100%);
    transition: all 0.4s ease;
}

.obrazok img:hover {
    filter: grayscale(0%);
    transform: scale(1.02);
}

/*kontakt*/
footer {
    width: 100%;
    background-color: #1a1a1a;
    color: #ffffff;
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
}

.kontakt h3 {
    color: #81d4fa;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.kontakt p {
    margin: 5px 0;
    font-size: 0.9rem;
    color: #ffffff;
}

.kontakt a {
    color: #b3e5fc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.kontakt a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/*telefon*/
@media (max-width: 764px) {
    .obrazky { grid-template-columns: 1fr; }
    h1 { font-size: 2rem; }
    nav { gap: 20px; }
}