/* Letter container */
.letter {
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    width: var(--circle-width);
    height: var(--circle-width);
    filter: drop-shadow(-0.9vh 0.5vh 0vh rgb(150, 150, 150));
    top: 0%;
    left: 50%;
    margin-top: calc((var(--circle-width) / 2 * -1));
    margin-left: calc((var(--circle-width) / 2 * -1));
    rotate: 0deg;
    transition: scale 0.07s ease-out, filter 0.07s ease-out, rotate 1s ease-out; /* If browser doesn't support the below transition */
    transition: scale 0.07s ease-out, filter 0.07s ease-out, rotate 1s linear(
        0, 0.8, 1, 1.3, 1.3227, 1.3, 1.2, 0.88, 0.8688, 0.88, 1, 1.03, 1.0463, 1.03, 1, 0.99, 0.9836, 1, 1.04, 1.05, 1.058, 1.04, 1, 0.9999, 0.998, 0.999, 1
    );
    pointer-events: none;

    scale: 1;
}

.letter.invalid {
    scale: 1.1 !important;
    filter: drop-shadow(-1.1vh 0.7vh 0.7vh rgb(175, 175, 175));
}

/* .letter.on-create {
    animation: 3s ease-out 0s circles-create;
    animation-iteration-count: 1;
} */

.letter.historical {
    filter: contrast(75%);
}

.letter.showOrHide {
    visibility: hidden;
}

.letter.currentIndex,
.letter.currentIndex.hoverable {
    scale: 1.1 !important;
    filter: drop-shadow(-1.1vh 0.7vh 0.7vh rgb(175, 175, 175));
    z-index: 2;
    pointer-events: none !important;
    cursor: none;
}

.letter.win {
    scale: 1.1 !important;
    filter: drop-shadow(-1.1vh 0.7vh 0.7vh rgb(175, 175, 175));
    z-index: 1;
}

.letter.hoverable {
    pointer-events: all !important;
}

.letter.hoverable:hover {
    scale: 1.1 !important;
    filter: drop-shadow(-1.1vh 0.7vh 0.7vh rgb(175, 175, 175));
    cursor: pointer;
    z-index: 1;
}


/* Letter border if end letter */
.endLetterBorder {
    position: absolute;
    filter: contrast(0%) brightness(50%);
    width: var(--circle-width);
    scale: 1.3;
}


/* Letter circle types */
.circle {
    position: absolute;
    width: var(--circle-width);
    height: var(--circle-width);
}

.circle.unsubmitted {
    filter: contrast(0) brightness(200%);
}

.circle.submitted.noExist {
    filter: contrast(0) brightness(145%);
}

.circle.submitted.inLoop {
    filter: contrast(0) sepia(100%) hue-rotate(190deg) saturate(100000%) brightness(80%);
}

.circle.submitted.inWord {
    filter: contrast(0) sepia(100%) hue-rotate(377deg) saturate(4000%) brightness(100%);
}

.circle.submitted.correct {
    filter: contrast(0) sepia(100%) hue-rotate(90deg) saturate(100000%) brightness(85%);
}

.circle.submitted.incorrect {
    filter: contrast(0) sepia(100%) hue-rotate(1deg) saturate(100000%) brightness(90%);
}

.circle.invalid, 
.circle.invalid.unsubmitted, 
.circle.invalid.submitted.noExist, 
.circle.invalid.submitted.inLoop, 
.circle.invalid.submitted.inWord, 
.circle.invalid.submitted.correct, 
.circle.invalid.submitted.incorrect {
    filter: contrast(0) sepia(0%) hue-rotate(1deg) saturate(100000%) brightness(0%);
    animation-name: invalid-letter, invalid-letter, invalid-letter, invalid-letter;
    animation-timing-function: ease-in-out;
    animation-iteration-count: 1;
    animation-duration: 0.25s;
    animation-delay: 1s, 1.25s, 1.5s, 1.75s;
    animation-direction: normal, reverse, normal, reverse;
}


/* Letter text */
.letterText {
    position: relative;
    font-weight: bold;
    text-align: center;
    font-size: calc(var(--circle-width) * 9 / 16);
}

.letterText.unsubmitted {
    color: black;
}

.letterText.submitted {
    color: white;
}

.letterText.invalid {
    color: white;
}




/* Animations */
.letter.flip-in {
    animation: 0.15s ease-out 0s flip-in;
    animation-iteration-count: 1;
}

.letter.flip-out {
    transform: rotateY(90deg);
    animation: 0.15s ease-out 0s flip-out;
    animation-iteration-count: 1;
}

.letter.flip-in-out {
    animation: 0.1s ease-in 0s flip-out, 0.1s ease-out 0.1s flip-in;
    animation-iteration-count: 1;
}

:is(.letter.currentIndex) {
    will-change: transform; /* Suddently when I changed the animation, the text became jittery, so had to include this to inform computer not to cache the transform state of this */
    animation: currentIndex-bounce-startup, currentIndex-bounce;
    animation-duration: 3.25s, 15s;
    animation-delay: 0s, 3.25s;
    animation-iteration-count: 1, infinite;
    animation-timing-function: ease;
}

.letter.win_Anim {
    transition-property: scale, filter;
    transition-duration: 0.7s, 0.7s;

    transition-timing-function: ease-out, ease-out; /* If browser doesn't support the below transition timing function */
    transition-timing-function: linear(0, 0, 0, 0, 0, 1.1, 0.9, 1.1, 0.9, 1, 1, 1), linear(0, 0, 0, 0, 0, 1.1, 0.9, 1.1, 0.9, 1, 1, 1);
}


@keyframes flip-in {
    0% {
        transform: rotateY(-90deg);
    }
    95% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(0deg);
    }
}

@keyframes flip-out {
    0% {
        transform: rotateY(0deg);
    }
    95% {
        transform: rotateY(90deg);
    }
    100% {
        transform: rotateY(90deg);
    }
}

@keyframes invalid-letter {
    to { 
        filter: contrast(0) sepia(100%) hue-rotate(1deg) saturate(100000%) brightness(90%);
    }
}

@keyframes currentIndex-bounce {
    0% {
        transform: translateY(-0.75vh);
    }
    50% {
        transform: translateY(0.75vh);
    }
    100% {
        transform: translateY(-0.75vh);
    }
}

@keyframes currentIndex-bounce-startup {
    to {
        transform: translateY(-0.75vh);
    }
}

/* @keyframes circles-create {
    0% {
        transform: rotateZ(-180deg);
    }
    100% {
        transform: rotateZ(0deg);
    }
} */