html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    scroll-behavior: smooth;
    font-size: 1.2rem;
}
body {
    color: whitesmoke !important;
    background-image: url(backgroundGT3.jpg);
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
}
p{
    font-size: 1.2rem;
}
.nav-special {
    background-color: rgba(0, 0, 0, 0.748);
    transition: 0.3s ease;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 10;
    padding: 15px 0;
    border-bottom: solid  #ff9900;
    font-family: 'Nadpis';
}
.navbar-nav .nav-link {
    color: whitesmoke ;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}
.navbar-nav .nav-link:hover {
    color:  #ff9900 !important;
    font-size: 1.5rem;
    transition: 0.5s;
}
.video-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}
.video-container video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    z-index: -1;
}
.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: whitesmoke;
    background: rgba(0, 0, 0, 0.4);
    font-family: 'Nadpis';
}
.down-arrow {
    cursor: pointer;
    animation: bounce 2s infinite;
}
.down-arrow:hover {
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.5));
    border-radius: 10px;
    transition: 1s;
}
.container i {
    margin-right: 8px;
    color: #28a745;
}
.introduction{
    height: 65px;
}
.carousel-item {
    opacity: 0;
    transition: opacity 1s ease-in-out;
}
.carousel-item-next, .carousel-item-prev, .carousel-item.active {
    opacity: 1;
}
.img-thumbnail {
    border: none !important;
    padding: 0 !important;
    border-radius: 0 !important;
    cursor: pointer;
}
.thumb {
    border: 2px solid #ff9900 !important;
    border-radius: 8px !important;
}
.thumb.active {
    border: 4px solid rgb(255, 115, 0) !important;
    border-radius: 10px !important;
}
.card-kelvin {
    background-color: #343a40;
    border: 4px solid #343a40;
    color: whitesmoke;
    border-radius: 5px;
    padding: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    margin-top: 20px;
}
.card-kelvin:hover {
    transform: scale(1.02);
}
.card-kelvin p,.card-kelvin h4 {
    margin-bottom: 10px;
    margin-top: 5px;
}
.card-kelvin img {
    border-radius: 10px;
}
.card-marciello {
    background-color: #343a40;
    border: 4px solid #343a40;
    color: whitesmoke;
    border-radius: 5px;
    padding: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    margin-top: 20px;
}
.card-marciello:hover {
    transform: scale(1.02);
}
.card-marciello p,.card-marciello h4 {
    margin-bottom: 10px;
    margin-top: 5px;
}
.card-marciello img {
    border-radius: 10px;
}
.card-thiim {
    background-color: #343a40;
    border: 4px solid #343a40;
    color: whitesmoke;
    border-radius: 5px;
    padding: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    margin-top: 20px;
}
.card-thiim:hover {
    transform: scale(1.02);
}
.card-thiim p,.card-thiim h4 {
    margin-bottom: 10px;
    margin-top: 5px;
}
.card-thiim img {
    border-radius: 10px;
}
.carousel-control-prev:hover {
    background: linear-gradient(to left, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.5));
    transition: 1s;
}
.carousel-control-next:hover {
    background: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.5));
    transition: 1s;
}
.hodiny {
    font-size: 4rem; 
    font-weight: bold;
}
.cas-box h4 {
    font-size: 2rem; 
}
.jump-left-right {
    display: inline-block;
    animation: leftRightBounce 4s infinite;
}
hr {
    border: none;
    height: 3px;
    background-color: #ff9900 !important;
}
.navbar-brand img{
    height: 60px !important;
    width: auto !important;
}
@font-face {
    font-family: 'Nadpis';
    src: url('../Fonty/Montserrat/static/Montserrat-Regular.ttf');
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
    transform: translateY(0); 
    }
    40% {
    transform: translateY(10px); 
    }
    60% {
    transform: translateY(5px); 
    }
}
@keyframes leftRightBounce {
    0% {
    transform: translateX(0);
    }
    15% {
    transform: translateX(-8px); 
    }
    30% {
    transform: translateX(8px); 
    }
    45% {
    transform: translateX(0);
    }
    100% {
    transform: translateX(0);
    }
}
@media (min-width: 2560px) and (max-width: 3839px) {
    .hodiny{
        font-size: 4rem; 
    }
    .container h2{
        font-size: 5rem; 
    }
    .card-title{
        font-size: 2rem;
    }
    p{
        font-size: 1.5rem;
    }
}
@media (min-width: 1920px) and (max-width: 2559px) {
    .hodiny{ 
    font-size: 3.7rem; 
    }
    .container h2{
    font-size: 4rem; 
    }
    p{
    font-size: 1rem;
    }
}
@media (min-width: 1441px) and (max-width: 1919px) {
    .hodiny{ 
    font-size: 2.8rem; 
    }
    .container h2{ 
    font-size: 3rem; 
    }
    p{
    font-size: 1rem;
    }
}
@media (min-width: 1024px) and (max-width: 1440px) {
    .hodiny{ 
    font-size: 2rem; 
    }
    .container h2{ 
    font-size: 2.1rem; 
    }
    .cas-box h4{ 
    font-size: 1.2rem; 
    }
    p{
    font-size: 1rem; 
    }
}
@media (min-width: 768px) and (max-width: 1023px) {
    .hodiny{ 
    font-size: 1.8rem; 
    }
    .container h2{ 
    font-size: 2rem; 
    }
    .cas-box h4{ 
    font-size: 2rem; 
    }
    p{
    font-size: 1rem;
    }
}
@media (min-width: 481px) and (max-width: 767px) {
    .hodiny{ 
    font-size: 1.8rem; 
    }
    .container h2{ 
    font-size: 2rem; 
    }
    .cas-box h4{ 
    font-size: 2rem; 
    }
    p{
    font-size: 1rem;
    }
}
@media (max-width: 480px) {
    .hodiny{ 
    font-size: 1rem; 
    }
    .container h2{ 
    font-size: 1.2rem; 
    }
    .cas-box h4{ 
    font-size: 1rem; 
    }
    p{
    font-size: 1rem;
    }
}