:root {
    /* Easier to tweak globally */
    --instruction-font: clamp(1.8rem, 6vh, 4rem);
    --counter-font: clamp(1.5rem, 5vh, 3rem);
    --gura-size: clamp(45vh, 20vh, 25vh);
    -webkit-tap-highlight-color: transparent;
}

/* Global font */
* {
    font-family: "Delius", cursive;
    box-sizing: border-box;
}

/* Instructions text */
#instructions {
    font-optical-sizing: auto;
    font-weight: 700;
    text-align: center;
    color: white;
    position: absolute;
    top: 18vh;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--instruction-font);
    margin: 0 -100% -100% 0;
    max-width: 90%;
    line-height: 1.2;
}

/* Counter text */
#txtCounter {
    font-optical-sizing: auto;
    font-weight: 400;
    text-align: center;
    color: white;
    position: absolute;
    top: 30vh;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--counter-font);
    margin: 0;
}

/* Plushie and Dancing Gura share same position and size */
#GawrGura,
#DancinGura {
    position: absolute;
    display: block;
    left: 50%;
    top: 65vh;
    transform: translate(-50%, -50%);
    width: var(--gura-size);
    height: auto;
    cursor: pointer;
    max-width: 80%;
}

#DancinGura {
    opacity: 0;
    transition: opacity 2s ease-in-out;
    cursor: default;
}

/* Gura plushie actions when it's clicked */
#GawrGura:active{
    width: 38vh;
    height: auto;
}

/* Fullscreen overlay */
.overlay {
    position: fixed;
    inset: 0; /* shorthand for top:0; right:0; bottom:0; left:0 */
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(75px);

    display: flex; /* Flexbox will center contents */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    text-align: center;
    padding: 1rem;
}

/* Phone image or icon */
.phone {
    width: min(40%, 250px); /* responsive scaling: max width is 250px */
    height: auto;
}

/* Message text */
.message {
    top: 50px;
    color: white;
    font-style: italic;
    font-weight: bold;
    font-size: clamp(1.2rem, 4vw, 2.5rem); /* responsive text size */
}

/* Phone and message opacity animation */
.phone, .message{
    animation-name: message-transparency;
    animation-duration: 1s;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

@keyframes message-transparency {
    0%{
        opacity: 100%;
    }
    100%{
        opacity: 10%;
    }
}

/* Hide everything in landscape */
@media only screen and (orientation: landscape) {
    .overlay {
        display: none;
    }
}