/* ------------------------------------------------------------

   ZÁKLADNÍ NASTAVENÍ + POZADÍ

------------------------------------------------------------ */

body {

    font-family: Arial, sans-serif;

    margin: 0;

    padding: 0;



    /* OCR pozadí */

    background: #111 url("ocr-bg.png") no-repeat center top fixed;

    background-size: auto;



    color: #eee;

}



/* ------------------------------------------------------------

   HLAVIČKA – BANNER MÍSTO NADPISU

------------------------------------------------------------ */

header {

    padding: 20px 0;

    margin: 0;

    border-bottom: 2px solid #444;

    text-align: center;

}



header img {

    max-width: 100%;

    height: auto;

    width: auto;

    display: inline-block;

}





/* ------------------------------------------------------------

   SEZNAM PŘEKÁŽEK (TOC)

------------------------------------------------------------ */

.toc {

    padding: 50px 20px;

    background: rgba(24, 24, 24, 0.85);

    border-bottom: 2px solid #333;

    backdrop-filter: blur(3px);

    text-align: center;

}



.toc h2 {

    margin-top: 0;

    font-size: 28px;

    color: #ffffff;

    text-transform: none;

    letter-spacing: 0.5px;

    margin-bottom: 25px;

}



.toc ul {

    list-style: none;

    padding: 0;

    margin: 0 auto;

    max-width: 1000px;

    columns: 3;

    column-gap: 80px;

}



.toc li {

    margin-bottom: 8px;

}



.toc a {

    color: #ff0000;

    text-decoration: none;

    font-weight: 600;

    transition: color 0.2s ease, text-shadow 0.2s ease;

}



.toc a:hover {

    color: #fff;

    text-shadow: 0 0 6px #ff0000;

}





/* ------------------------------------------------------------

   GRID PŘEKÁŽEK

------------------------------------------------------------ */

.obstacles {

    display: grid;

    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));

    gap: 30px;

    padding: 40px;

}



.obstacle {

    background: rgba(26, 26, 26, 0.92);

    padding: 20px;

    border-radius: 8px;

    border: 1px solid #333;

    backdrop-filter: blur(3px);

}



.obstacle h3 {

    margin-top: 0;

    color: #ff0000;

    text-transform: uppercase;

    font-size: 22px;

    letter-spacing: 1px;

}



.obstacle img {

    width: 100%;

    border-radius: 6px;

    margin: 15px 0;

}





/* ------------------------------------------------------------

   SEKCE POPISŮ (Cíl, Podmínky, Povoleno, Zakázáno)

------------------------------------------------------------ */

.section-title {

    font-size: 18px;

    margin: 15px 0 5px;

    font-weight: bold;

    color: #ff0000;

}



.conditions li,

.allowed-list li,

.forbidden-list li {

    color: #ffffff;

    margin-left: 15px;

}





/* ------------------------------------------------------------

   PLOVOUCÍ ŠIPKA NAHORU

------------------------------------------------------------ */

.back-top {

    position: fixed;

    bottom: 25px;

    right: 25px;

    background: #ff0000;

    color: #fff;

    padding: 14px 16px;

    border-radius: 50%;

    font-size: 22px;

    text-decoration: none;

    box-shadow: 0 0 10px #000;

    z-index: 999;

    transition: background 0.2s ease;

}



.back-top:hover {

    background: #cc0000;

}





/* ------------------------------------------------------------

   RESPONSIVE

------------------------------------------------------------ */

@media (max-width: 900px) {

    .toc ul {

        columns: 2;

        column-gap: 40px;

    }

}



@media (max-width: 600px) {

    .toc ul {

        columns: 1;

    }



    .toc h2 {

        font-size: 22px;

    }

}