.tt-page {
    --tt-heading: #0b5c6e;
    --tt-text: #33474d;
    --tt-muted: #5a6b70;
    --tt-border: #cfe5ea;
    --tt-panel: #f4fafb;
    --tt-correct: #11693a;
    --tt-incorrect: #b3261e;
    --tt-incorrect-bg: #fdecea;
    --tt-partial: #8a5a00;
    --tt-button: #0b5f70;
    --tt-surface: #ffffff;
    --tt-input-text: #1f2d31;
    --tt-font-size: 1.45rem;
    --tt-line-height: 2;
    max-width: 1000px;
    margin: 0 auto 48px;
    padding: 4px 8px 16px;
    color: var(--tt-text);
}
.tt-page[data-font-size="small"] { --tt-font-size: 1.15rem; }
.tt-page[data-font-size="large"] { --tt-font-size: 1.85rem; }
.tt-page[data-line-spacing="compact"] { --tt-line-height: 1.6; }
.tt-page[data-line-spacing="wide"] { --tt-line-height: 2.5; }
.tt-page[data-theme="dark"] {
    --tt-heading: #8bdcec;
    --tt-text: #d6e4e8;
    --tt-muted: #a3b6bb;
    --tt-border: #2c4a52;
    --tt-panel: #13303a;
    --tt-correct: #6fdc9f;
    --tt-incorrect: #ffb4ab;
    --tt-incorrect-bg: #5c1a14;
    --tt-partial: #ffd479;
    --tt-button: #14758a;
    --tt-surface: #10292f;
    --tt-input-text: #e8f2f4;
    background: #0a1d24;
}
@media (prefers-color-scheme: dark) {
    .tt-page[data-theme="system"] {
        --tt-heading: #8bdcec;
        --tt-text: #d6e4e8;
        --tt-muted: #a3b6bb;
        --tt-border: #2c4a52;
        --tt-panel: #13303a;
        --tt-correct: #6fdc9f;
        --tt-incorrect: #ffb4ab;
        --tt-incorrect-bg: #5c1a14;
        --tt-partial: #ffd479;
        --tt-button: #14758a;
        --tt-surface: #10292f;
        --tt-input-text: #e8f2f4;
        background: #0a1d24;
    }
}
.tt-page h1 {
    margin: 8px 0 6px;
    color: var(--tt-heading);
    font-size: clamp(1.6rem, 4vw, 2.3rem);
    font-weight: 700;
}
.tt-page h2 {
    margin: 32px 0 10px;
    color: var(--tt-heading);
    font-size: 1.3rem;
    font-weight: 700;
}
.tt-intro {
    margin-bottom: 16px;
    color: var(--tt-muted);
}
.tt-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.tt-links a {
    display: block;
    padding: 7px 14px;
    border: 1px solid var(--tt-border);
    border-radius: 18px;
    color: var(--tt-heading);
    text-decoration: none;
}
.tt-links a:hover {
    border-color: var(--tt-heading);
}
.tt-links a[aria-current="page"] {
    background: var(--tt-heading);
    border-color: var(--tt-heading);
    color: #ffffff;
}
.tt-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 16px 0 10px;
}
.tt-language {
    display: flex;
    align-items: center;
    gap: 8px;
}
.tt-language select, .tt-custom input, .tt-choice input[type="number"], .tt-choice select, .tt-custom-source textarea {
    padding: 7px 10px;
    border: 1px solid var(--tt-border);
    border-radius: 8px;
    background: var(--tt-surface);
    color: var(--tt-input-text);
}
.tt-stats {
    display: flex;
    gap: 22px;
}
.tt-stat span {
    display: block;
    color: var(--tt-muted);
    font-size: 0.8rem;
}
.tt-stat strong {
    color: var(--tt-heading);
    font-size: 1.4rem;
}
.tt-practice {
    position: relative;
    min-height: 190px;
    max-height: 260px;
    padding: 18px 20px;
    overflow-y: auto;
    border: 2px solid var(--tt-border);
    border-radius: 12px;
    background: var(--tt-panel);
    font-size: var(--tt-font-size);
    line-height: var(--tt-line-height);
    overflow-wrap: anywhere;
    white-space: pre-wrap;
    cursor: text;
}
.tt-practice:focus-within, .tt-practice.tt-active {
    border-color: var(--tt-heading);
}
/* Fallbacks for each script. The browser picks the first font that has the glyph. */
.tt-script-latin { font-family: "Segoe UI", system-ui, Roboto, Arial, sans-serif; }
.tt-script-bengali { font-family: "Noto Sans Bengali", "Nirmala UI", "Vrinda", sans-serif; }
.tt-script-devanagari { font-family: "Noto Sans Devanagari", "Nirmala UI", "Mangal", sans-serif; }
.tt-script-arabic { font-family: "Noto Naskh Arabic", "Segoe UI", "Arial", sans-serif; }
.tt-script-urdu { font-family: "Noto Nastaliq Urdu", "Jameel Noori Nastaleeq", "Segoe UI", sans-serif; }
.tt-practice.tt-script-urdu { line-height: calc(var(--tt-line-height) + 0.6); }
.tt-script-cyrillic { font-family: "Segoe UI", system-ui, Roboto, Arial, sans-serif; }
.tt-script-thai { font-family: "Noto Sans Thai", "Leelawadee UI", "Tahoma", sans-serif; }
.tt-script-japanese { font-family: "Noto Sans JP", "Yu Gothic UI", "Meiryo", sans-serif; }
.tt-script-korean { font-family: "Noto Sans KR", "Malgun Gothic", sans-serif; }
.unit.untyped { color: var(--tt-muted); }
.unit.correct { color: var(--tt-correct); }
.unit.partial { color: var(--tt-partial); text-decoration: underline dotted; }
/* Errors are underlined and shaded, so they do not rely on colour alone. */
.unit.incorrect {
    background: var(--tt-incorrect-bg);
    color: var(--tt-incorrect);
    text-decoration: underline wavy;
}
.unit.current {
    outline: 2px solid var(--tt-heading);
    outline-offset: 1px;
    border-radius: 2px;
}
.tt-page[data-caret="underline"] .unit.current {
    outline: 0;
    border-bottom: 3px solid var(--tt-heading);
    border-radius: 0;
}
.tt-page[data-caret="bar"] .unit.current {
    outline: 0;
    border-inline-start: 3px solid var(--tt-heading);
    border-radius: 0;
}
.tt-input {
    display: block;
    width: 100%;
    height: 56px;
    margin-top: 10px;
    padding: 10px 14px;
    border: 1px solid var(--tt-border);
    border-radius: 10px;
    background: var(--tt-surface);
    color: var(--tt-input-text);
    font-size: 1.1rem;
    resize: none;
}
.tt-input:focus-visible, .tt-button:focus-visible, .tt-links a:focus-visible {
    outline: 3px solid var(--tt-heading);
    outline-offset: 2px;
}
.tt-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
}
.tt-button {
    padding: 9px 22px;
    border: 0;
    border-radius: 20px;
    background: var(--tt-button);
    color: #ffffff;
    cursor: pointer;
}
.tt-custom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}
.tt-error {
    min-height: 1.2em;
    margin: 4px 0 0;
    color: var(--tt-incorrect);
    font-size: 0.9rem;
}
.tt-status {
    min-height: 1.5em;
    margin: 8px 0 0;
    color: var(--tt-muted);
}
.tt-results {
    margin-top: 18px;
    padding: 20px;
    border: 1px solid var(--tt-border);
    border-radius: 12px;
    background: var(--tt-surface);
}
.tt-results dl {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin: 12px 0;
}
.tt-results dt {
    color: var(--tt-muted);
    font-size: 0.85rem;
    font-weight: 400;
}
.tt-results dd {
    margin: 0;
    color: var(--tt-heading);
    font-size: 1.35rem;
    font-weight: 700;
}
.tt-note {
    color: var(--tt-muted);
    font-size: 0.9rem;
}
.tt-page .tt-modes {
    margin-bottom: 12px;
}
.tt-page a[aria-current="page"] {
    color: #ffffff;
}
.tt-page[data-theme="dark"] .tt-links a[aria-current="page"] {
    color: #0a1d24;
}
.tt-choice {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 16px;
    margin: 0 0 12px;
    padding: 8px 12px 10px;
    border: 1px solid var(--tt-border);
    border-radius: 10px;
}
.tt-choice legend {
    float: none;
    width: auto;
    margin: 0;
    padding: 0 6px;
    color: var(--tt-muted);
    font-size: 0.85rem;
}
.tt-choice input[type="number"] {
    width: 90px;
    padding: 4px 8px;
}
.tt-choice[hidden] {
    display: none;
}
body:has(.tt-page[data-theme="dark"]) {
    background: #0a1d24;
}
@media (prefers-color-scheme: dark) {
    body:has(.tt-page[data-theme="system"]) {
        background: #0a1d24;
    }
}
.tt-choice:disabled {
    opacity: 0.6;
}
.tt-custom-source textarea {
    display: block;
    width: 100%;
}
.tt-custom-source > label {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
}
.tt-custom-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0 12px;
}
.tt-button {
    display: inline-block;
    text-decoration: none;
}
.tt-button:hover {
    color: #ffffff;
}
.tt-secondary, .tt-secondary:hover {
    border: 1px solid var(--tt-heading);
    background: transparent;
    color: var(--tt-heading);
}
.tt-settings {
    margin-top: 16px;
    padding: 10px 14px;
    border: 1px solid var(--tt-border);
    border-radius: 10px;
}
.tt-settings summary {
    color: var(--tt-heading);
    font-weight: 600;
    cursor: pointer;
}
.tt-settings[open] summary {
    margin-bottom: 12px;
}
.tt-page[data-reduced-motion="true"] * {
    transition: none;
    animation: none;
    scroll-behavior: auto;
}
@media (prefers-reduced-motion: reduce) {
    .tt-practice { scroll-behavior: auto; }
}
.tt-progress-stats {
    margin: 12px 0;
}
.tt-table-wrap {
    overflow-x: auto;
}
.tt-table {
    width: 100%;
    border-collapse: collapse;
}
.tt-table th, .tt-table td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--tt-border);
    text-align: left;
}
.tt-table th {
    color: var(--tt-muted);
    font-size: 0.85rem;
    font-weight: 600;
}
.tt-profile {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 12px;
}
.tt-profile input, .tt-profile select {
    padding: 7px 10px;
    border: 1px solid var(--tt-border);
    border-radius: 8px;
}
.tt-danger {
    background: #b3261e;
}
.tt-filters {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 10px 14px;
}
.tt-filters label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.85rem;
}
.tt-filters select, .tt-report-text {
    padding: 7px 10px;
    border: 1px solid var(--tt-border);
    border-radius: 8px;
    background: var(--tt-surface);
    color: var(--tt-input-text);
}
.tt-report-text {
    display: block;
    width: 100%;
    margin: 4px 0 8px;
}
.tt-page p a, .tt-page td a {
    color: var(--tt-heading);
    text-decoration: underline;
}