@keyframes fade-out {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 0; }
}

/* Class to hide the welcome screen */
.fade-out {
    animation: fade-out 0.12s forwards;
    pointer-events: none;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    margin: 0;
    height: 100dvh;
    background: linear-gradient(#78cbff, #09a1ff);
    font-family: Arial, Helvetica, sans-serif;
}

/******************/
/* Welcome Screen */
/******************/

#welcome-container {
    border: 4px solid white;
    border-radius: 12px;
    padding: 32px 20px;
    margin: 0 24px;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

#w-h1 {
    margin-top: 0;
    font-size: 2.2rem;
}

.w-tip {
    font-size: 12px;
    margin-bottom: 16px;
}

#w-enter {
    background-color: #c0deff;
    padding: 20px 70px;
    border: 2px solid black;
    border-radius: 12px;
    box-shadow: 4px 4px 0 black;
    cursor: pointer;
    transition: all 0.12s ease;
    user-select: none;
    color: black;
    -webkit-tap-highlight-color: transparent;
}

#w-enter:active { transform: translate(2px, 2px); box-shadow: none; }

/************/
/* Elements */
/************/

#sand {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100dvw;
    height: auto;
    object-fit: cover;
    object-position: bottom center;
    margin: 0;
}

#main-container {
    width: 100dvw;
    display: flex;
    justify-content: center;
}

#group-tree {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
}

#moon {
    height: 50px;
    width: 50px;
    background-color: yellow;
    box-shadow: 0 0 12px rgb(255, 255, 0, 0.5);
    border-radius: 50%;
    position: absolute;
    top: 200px;
    right: 100px;
}

/*********/
/* Sound */
/*********/

#black-noise {
    position: absolute;
    top: 20px;
    height: 40px;
    width: 300px;
    max-width: 90vw;
    color-scheme: light;
}

label {
    cursor: pointer;
}

#w-controls-toggle,
#w-controls-toggle + label {
    vertical-align: middle;
}

#w-controls-toggle {
    vertical-align: center;
    accent-color: black;
    cursor: pointer;
    height: 15px;
    width: 15px;
    transition: all 0.12s ease;
}

#w-controls-toggle:active {
    transform: scale(0.95);
}

@media (hover: hover) {
    #w-enter:hover {
        transform: translate(-2px, -2px);
        box-shadow: 6px 6px 0 black;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(#1f0021, #000);
        color: rgb(100, 100, 100);
    }

    #welcome-container { border: 4px solid rgb(20, 20, 20); }

    #w-controls-toggle { accent-color: white; }

    #black-noise { color-scheme: dark; }

    #w-enter {
        background-color: rgb(100, 100, 100);
        color: black;
        border: 2px solid rgb(20, 20, 20);
        box-shadow: 4px 4px 0 rgb(50, 50, 50);
    }

    #w-enter:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 rgb(50, 50, 50); }
    #w-enter:active { transform: translate(2px, 2px); box-shadow: none; }

    #group-tree { filter: brightness(0.4); }

    #moon {
        background-color: rgb(60, 60, 60);
        box-shadow: 0 0 12px rgb(60, 60, 60, 0.5);
    }

    #sand { filter: brightness(0.2); }

}