html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden; /* Tohle je klíčové - schová scrollbary a zakáže posun */
    position: fixed;  /* Pojistka pro mobilní prohlížeče */
}

.KrevetakPozadi {
    width: 100vw;
    height: 100vh;
    position: absolute;
    z-index: -1;
    inset: 0;
    overflow: hidden;
}

.KrevetakPozadi img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* SPOLEČNÉ PRO VŠECHNY FADE PRVKY */
#infomimo, #krevetka, .BackBtn {
    opacity: 0;
    visibility: hidden;
    transition: opacity 2.5s ease-in-out, visibility 2.5s;
}

/* TŘÍDA KTEROU PŘIDÁ JS */
.is-visible {
    opacity: 1 !important;
    visibility: visible !important;
}

#infomimo {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: contain;
    z-index: 5;
    pointer-events: none;
    transform: translateY(-5vh);
}

@font-face{
  font-family: HostinaText2;
  src: url(fonts/OUTFIT-BOLD.TTF) format('truetype');
}

#krevetka {
    top: 40%;
    left: 68%;
    position: absolute;
    width: 13vh;
    z-index: 6;
    background: radial-gradient(circle, rgba(166, 191, 229, 0.225) 0%, transparent 70%);
    padding: 20px;
    border-radius: 50%;
}

/* Animaci houpání dáme až potom, co se zviditelní, aby to neblblo */
.is-visible#krevetka {
    animation: float 2s infinite ease-in-out;
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-2vh); }
    100% { transform: translateY(0); }
}

.BackBtn {
    position: absolute;
    top: 80%;
    left: 75%;
    padding: 12px 30px;

    font-family: HostinaText2;
    font-size: 1.5rem;
    cursor: pointer;
  
    background-color: transparent; 
    background-image: url('extra/zpetbtn.png');
    background-repeat: no-repeat; 
    background-size: 100% 100%;
    background-position: center;

    color: white;
    border: none;
    z-index: 100;
}