body{
 margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background: no-repeat center center;
    background-size: cover;
    background-image: url("pozadicko.jpg");
    position: relative;
    font-family: Arial, sans-serif;
}
#bubbles {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}
.bubble {
    position: absolute;
    bottom: -100px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0.7;
    animation: rise 6s linear infinite;
}
/*Animace  bublinek*/
@keyframes rise {
    0% { transform: translateY(0) scale(0.5); }
    100% { transform: translateY(-120vh) scale(1); }
}
/*Tlačítko hrát*/
#playButton {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: none;
    border: none;
    cursor: pointer;
}

#playButton img {
    display: block;
    width: auto;  
    height: auto; 
}
/* ===== NÁZEV ===== */
#title {
    position: absolute;
    top: 20%;
    width: 100%;
    text-align: center;
    font-family: 'Trebuchet MS', Arial, sans-serif;
    font-size: 96px;
    letter-spacing: 8px;

    background: linear-gradient(
        to bottom,
        #bfeeee 0%,
        #32b0b4 45%,
        #77eff8 100%
    );

    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;

    text-shadow:
        0 0 6px rgba(0, 40, 45, 0.8),
        0 0 18px rgba(0, 20, 30, 0.7);
}
#title span {
    font-size: 72px;
    color: #246b5f;
}

/* ===== AUTOR ===== */
#author {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
    font-family: 'Pangolin', cursive;
    font-size: 16px;
    color: rgba(200, 240, 240, 0.7);
    line-height: 1.4;
}
#title {
    animation: floatTitle 7s ease-in-out infinite;
}

@keyframes floatTitle {
    0%   { transform: translateY(0); }
    50%  { transform: translateY(8px); }
    100% { transform: translateY(0); }
}