* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/*ZÁKLAD*/
body {
    background-color: #f8fafc;
    color: #1e293b;
    line-height: 1.5;
    text-align: center;
}

/*NAVIGÁCIA*/
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 10%;
    background-color: rgba(31, 32, 37, 0.95);
    border-bottom: 2px solid #4f46e5;
    position: sticky;
    top: 0;
    z-index: 100;
}

/*TEXT*/
header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(45deg, #a855f7, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
/*H2*/
h2 {
    text-align: center;
    color: #453bcc;
    font-size: 1.6rem;
    margin: 35px 0 15px 0;
}
/*ZOZNAMY*/
p, li {
    font-weight: 500;
    color: #475569;
    margin-bottom: 12px;
}

/*ODKAZY*/
header ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

header ul a {
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
}

header ul a:hover {
    color: #3b82f6;
}

/*ARTICLE*/
article {
    max-width: 920px;
    margin: 30px auto;
    padding: 0 15px;
    text-align: left;
}

p, ul {
    text-align: left;
}

ul {
    padding-left: 20px;
}

/*GALÉRIA centr.*/
article:has(.gallery-item) {
    display: flex;
    flex-wrap: wrap;
    justify-content: center; 
    gap: 20px;
}

article:has(.gallery-item) h2 {
    width: 100%;
}

/* GALÉRIA */
div.gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

div.gallery-item {
    justify-content: center;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    overflow: hidden;
    width: calc(50% - 10px);
    min-width: 280px;
    max-width: 426px;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    
}

div.gallery-item:hover {
    border: 1px solid #4f46e5; 
}

div.gallery-item a iframe, 
div.gallery-item a video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    border: none;
}

/*GALÉRIA popis*/
div.gallery-item div.desc {
    padding: 15px;
    text-align: center;
    font-weight: 600;
    color: #475569;
    font-size: 0.9rem;
    background: #ffffff;
    border-top: 1px solid #f1f5f9;
}

/* PATIČKA */
footer {
    text-align: center;
    padding: 30px 20px;
    color: #cbd5e1;
    background: #1f2025;
    border-top: 2px solid #4f46e5;
    margin-top: 50px;
}
/*PATA*/
footer a img {
    width: 75px;
    background: #fff;
    padding: 3px;
    border-radius: 4px;
    margin-bottom: 12px;
}

footer p { 
    margin-bottom: 4px; 
    color: #94a3b8; 
    text-align: center;
}

footer #kontakt { 
    color: #fff; 
    font-weight: bold; 
}

/*PRISPOSOBENIE*/
@media screen and (max-width: 768px) {
    header { 
        flex-direction: column; 
        gap: 6px; 
        padding: 10px 5%; 
    }
    
    header ul { 
        gap: 12px; 
        flex-wrap: wrap; 
        justify-content: center; 
    }

   
    div.gallery-item {
        width: 100%;
        max-width: 426px;
    }
}