:root {
    --bg-color: #123;
    --bg-color-hover: #246;
    --bg-color-focus: #246;
    --bg-header: #357;
    --txt-color: #FFF;
    --txt-link: #DA0;
    --txt-link-hover: #FC0;
    --border: 2px solid #05080B;
    --convert-bg-color: #18293a;
    --convert-bg-color-selected: #1f364f;
    --space-big: 20px;
}

body,
textarea {
    font-family: sans-serif;
}

body {
    font-size: 20px;
    background-color: var(--bg-color);
    color: var(--txt-color);
    margin: 0;
    padding: 0;
}

a {
    color: var(--txt-link);
    text-decoration: none;
}

a:hover {
    color: var(--txt-link-hover);
}

#header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-header);
    border-bottom: var(--border);
    padding: 5px var(--space-big);
}

.kana-wrapper {
    margin: auto;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-big);
    padding: var(--space-big);
    max-width: 100%;
}

.kana-container {
    text-align: center;
}

.kana-table {
    display: flex;
    flex-direction: column;
    width: 200px;
}

.kana-row {
    display: flex;
    justify-content: space-between;
}

.kana {
    cursor: default;
    background-color: var(--bg-color);
    padding: 5px 10px;
}

.kana:hover {
    background-color: var(--bg-color-hover);
}

.converter-container {
    display: flex;
    flex-direction: column;
    max-width: 100%;
}

.text-converter {
    font-size: 18px;
    width: 500px;
    max-width: calc(100% - var(--space-big));
    min-height: 400px;
    height: 100%;
    background-color: var(--convert-bg-color);
    border: var(--border);
    color: white;
    padding: 10px;
    resize: none;
}

.text-converter:focus {
    outline: none !important;
    border-color: var(--bg-color-focus);
    box-shadow: none;
}

.convert-option {
    padding: 10px;
    background-color: var(--convert-bg-color);
    border: var(--border);
    border-bottom-width: 0px;
    border-left-width: 0px;
    cursor: pointer;
}

.convert-option:first-child {
    border-top-left-radius: 10px;
    border-left-width: 2px;
}

.convert-option:last-child {
    border-top-right-radius: 10px;
}

.convert-option.selected {
    background-color: var(--convert-bg-color-selected);
    border-color: var(--bg-color-focus);
}

.flex-row {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

.gap {
    gap: var(--space-big);
}