#test_section {
    max-width: 960px;
    margin: 0 auto;
}
.practice-category {
    margin-bottom: 30px;
}
.answer-input {
    text-align: center;
    box-sizing: border-box;
    color: var(--color-text);
    background-color: var(--color-foreground);
    border: none;
    border-bottom-style: solid 2px;
    border-color: var(--color-text);
    outline: none;
    font-size: 1rem;
    padding: 14px 12px;
    width: 100%;
}

.q-panel-content {
    padding: 1rem;
    position: relative;
}
.q-panel-content > :not(:last-child) {
    margin-bottom: 16px;
}
.q-panel-cover {
    display: none;
    background-color: var(--color-foreground);
    justify-content: center;
    align-items: center;
    position: absolute;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.q-panel-cover.show {
    display: flex;
}
.q-panel-cover-message {
    font-size: 1.2rem;
}
.q-panel-grid {
    grid-template-areas:
    'meaning vocab'
    'reading dir';
    display: grid;
    gap: 15px;
}
.grid-meaning {
    grid-area: meaning;
}
.grid-reading {
    grid-area: reading;
}
.grid-vocab {
    grid-area: vocab;
}
.grid-dir {
    grid-area: dir;
}
.q-panel.dim {
    filter: grayscale(60%) brightness(33%);
}
.q-panel > .header {
    font-weight: bold;
    font-size: 1.3rem;
    color: #fff;
    background-color: var(--color-green);
    padding: 8px;
}
.q-panel > .header.blue {
    background-color: var(--color-blue);
}
.q-panel > .header.orange {
    background-color: var(--color-orange);
}
.q-panel .sub-header {
    font-size: 1.2rem;
    background-color: var(--color-foreground);
}
.q-panel-content > .grid-container {
    grid-template-columns: auto auto auto auto;
    gap: 15px;
}
.vocab-question-container {
    padding: 14px 0 0 0;
}
.vocab-list {
    text-align: left;
    background-color: var(--color-foreground);
    padding: 8px 0px;
    font-size: 1rem;
}
.vocab-list > :not(:last-child) {
    border-bottom: solid 1px var(--color-border);
}
.vocab-list.scroll {
    min-height: 4rem;
    max-height: 50vh;
    overflow-y: auto;
}
.progress-bar {
    text-align: center;
    font-size: 0.85rem;
    background-color: var(--color-foreground);
    margin: 0 auto;
    height: 1rem;
    position: relative;
    padding: 0.5rem 0;
    width: 100%;
    border-radius: 18px;
    border: solid 1px var(--color-border);
    overflow: hidden;
}
.progress-indicator {
    transition: width 0.7s;
    background-color: var(--color-green);
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 0%;
}
.progress-text {
    color: var(--color-text);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    z-index: 1;
    font-weight: 700;
    background-color: var(--color-foreground);
    border-radius: var(--corner-radius);
    padding: 3px 10px;
}
.rank {
    overflow: hidden;
    border-radius: var(--corner-radius);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    position: relative;
    padding-top: 100%;
}
.rank.one {
    background-image: url("../images/ronin.png");
}
.rank.two {
    background-image: url("../images/ashigaru.png");
}
.rank.three {
    background-image: url("../images/samurai.png");
}
.rank.four {
    background-image: url("../images/daimyo.png");
}
.rank.five {
    background-image: url("../images/shogun.png");
}
.rank-one {
    background-image: url("../images/ronin.png");
}
.rank-two {
    background-image: url("../images/ashigaru.png");
}
.rank-three {
    background-image: url("../images/samurai.png");
}
.rank-four {
    background-image: url("../images/daimyo.png");
}
.rank-five {
    background-image: url("../images/shogun.png");
}
.rank-text {
    color: #fff;
    padding: 8px;
    font-size: 1.2rem;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0,0,0,0.8);
}
.question-kanji {
    width: fit-content;
    margin: 10px auto;
    font-size: 3rem;
    height: 4.4rem;
    transition: transform 2s;
}
.question-kanji.slideOut {
    animation-timing-function: linear;
    animation-name: slideOut;
    animation-duration: 0.15s;
    animation-iteration-count: 1;
    animation-fill-mode: forwards;
}
.question-kanji.slideIn {
    animation-timing-function: linear;
    animation-name: slideIn;
    animation-duration: 0.2s;
    animation-iteration-count: 1;
    animation-fill-mode: forwards;
}

.dir-selector {
    box-sizing: border-box;
    height: 1.4rem;
    width: 1.4rem;
    position: relative;
    color: #fff;
    font-weight: bold;
    font-size: 0.9rem;
    background-color: var(--color-orange);
    cursor: pointer;
    border: solid 1px var(--color-border);
    border-radius: 0.5rem;
}
.dir-selector::before {
    content: "";
    background-color: #fff;
    position: absolute;
    top: 4px;
    right: 4px;
    bottom: 4px;
    left: 4px;
    clip-path: polygon(0% 35%, 60% 35%, 60% 0%, 100% 50%, 60% 100%, 60% 65%, 0% 65%);
    transition: transform 0.2s;
}
.dir-selector.swap::before {
    transform: scaleX(-1);
}

.switch {
    position: relative;
    width: 3rem;
    height: 1.6rem;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.mark {
    position: absolute;
    cursor: pointer;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    background-color: var(--color-background);
    transition: 0.4s;
    border-radius: 34px;
}
.mark:before {
    border-radius: 50%;
    position: absolute;
    content: "";
    height: 1.2rem;
    width: 1.2rem;
    left: 0.3rem;
    bottom: 3px;
    transition: 0.2s;
    background-color: #fff;
}
input:checked + .mark {
    background-color: var(--color-orange);
}
input:checked + .mark:before {
    transform: translateX(1.3rem);
}

.oak-option {
    font-size: 1rem;
}

input[type=range] {
    background-color: inherit;
    height: 25px;
    -webkit-appearance: none;
}
input[type=range]:focus {
    outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 10px;
    cursor: pointer;
    animate: 0.2s;
    box-shadow: 0px 0px 0px #000000;
    background: var(--color-orange);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}
input[type=range]::-webkit-slider-thumb {
    box-shadow: 0px 0px 0px #000000;
    border: 1px solid var(--color-border);
    height: 18px;
    width: 18px;
    border-radius: 10px;
    background: #FFFFFF;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -5px;
}
input[type=range]:focus::-webkit-slider-runnable-track {
    background: var(--color-orange);
}
input[type=range]::-moz-range-track {
    width: 100%;
    height: 10px;
    cursor: pointer;
    animate: 0.2s;
    box-shadow: 0px 0px 0px #000000;
    background: var(--color-orange);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}
input[type=range]::-moz-range-thumb {
    box-shadow: 0px 0px 0px #000000;
    border: 1px solid var(--color-border);
    height: 18px;
    width: 18px;
    border-radius: 10px;
    background: #FFFFFF;
    cursor: pointer;
}
input[type=range]::-ms-track {
    width: 100%;
    height: 10px;
    cursor: pointer;
    animate: 0.2s;
    background: transparent;
    border-color: transparent;
    color: transparent;
}
input[type=range]::-ms-fill-lower {
    background: var(--color-orange);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    box-shadow: 0px 0px 0px #000000;
}
input[type=range]::-ms-fill-upper {
    background: var(--color-orange);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    box-shadow: 0px 0px 0px #000000;
}
input[type=range]::-ms-thumb {
    margin-top: 1px;
    box-shadow: 0px 0px 0px #000000;
    border: 1px solid var(--color-border);
    height: 18px;
    width: 18px;
    border-radius: 10px;
    background: #FFFFFF;
    cursor: pointer;
}
input[type=range]:focus::-ms-fill-lower {
    background: var(--color-orange);
}
input[type=range]:focus::-ms-fill-upper {
    background: var(--color-orange);
}

@keyframes slideOut {
    0% {
        transform: translateX(0) skewX(0);
        opacity: 1;
    }
    40% {
        transform: translateX(calc(-225% * 0.4)) skewX(-10deg);
        opacity: calc(1*0.4);
    }
    100% {
        transform: translateX(-225%) skewX(-10deg);
        opacity: 0;
    }
}

@keyframes slideIn {
    0% {
        transform: translateX(225%) skewX(-10deg);
        opacity: 0;
    }
    60% {
        opacity: calc(1*0.8);
        transform: translateX(calc(225% * 0.3)) skewX(-10deg);
    }
    100% {
        transform: translateX(0) skewX(0);
        opacity: 1;
    }
}

@media (max-width: 767.98px) {
    :root {
        font-size: 0.9em;
    }
    .dir-selector {
        width: 1.25rem;
        height: 1.25rem;
    }
    .q-panel > .header {
        font-size: 1.1rem;
    }
    .q-panel-content {
        padding: 0.75rem;
    }
    .rank-text {
        font-size: 0.9rem;
    }
}