html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

.purple-navbar {
    margin-bottom: 60px;
    background-image: url("images/overlay.png"), url("images/pokus1.png");
    background-repeat: repeat, no-repeat;
    background-size: auto, 100% 25%;
    background-attachment: fixed;
    overflow-y: scroll;
}

.custom-font-family {
    font-family: 'Lato', sans-serif;
}

.list-paragraph-style {
    list-style-type: "\00A7";
    font-size: 2rem !important;
}

.footer_relative {
    position: relative !important;
}

.tab-modern {
    border-top-left-radius: 0.75rem; /* jemně zaoblené rohy */
    border-top-right-radius: 0.75rem; /* jemně zaoblené rohy */
    box-shadow: 0 2px 8px rgba(0,0,0,0.08); /* jemný stín pod záložkou */
    transition: box-shadow 0.2s, background 0.2s;
    background: #fff;
    margin-bottom: 2px;
    color:white;
}

.top-modern {
    /*background-image: url("images/Pokus1.png");*/
    background: linear-gradient(135deg, #4A8588, #C0E4E5);
    background-repeat: no-repeat;
    background-size: 100% 25%;
    background-attachment: fixed;
    overflow-y: scroll;
}

.body-background-modern::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image: url("images/Pokus2.png");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    background-attachment: fixed;
    opacity: 0.1; /* nastavte požadovanou intenzitu (0.0 - 1.0) */
    z-index: -1;
}

.tab-modern:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    background: #C0E4E5;
}

.tab-modern.active {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    /*background: #f8f9fa;*/
    background: #DAF1F2;
}

.custom-card {
    border: 1px solid #ddd;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    /*background: linear-gradient(135deg, #f9f9f9, #f1f1f1);*/
    background: linear-gradient(135deg, #C0E4E5, #f5f5f5);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.custom-card .card.header {
    border-bottom: 1px solid #eee;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    background: none;
    padding-left: 0.5rem;
}

.custom-card .card.body {
    padding: 0;
    color: dimgrey;
    background: linear-gradient(135deg, #f9f9f9, #f1f1f1);
    padding-left: 2rem;
    padding-top: 1rem;
}

.card {
    border: 0px;
}

.card:hover {
    transform: scale(1.03);
    background: linear-gradient(135deg, #4A8588, #f5f5f5);
    /*background: linear-gradient(135deg, #ececec, #f5f5f5);*/
}

.custom-card .card.ul {
    background: inherit;
}

.custom-card .card.li {
    background: inherit;
}