.bkbg-tst-app {
    font-family: system-ui, -apple-system, sans-serif;
    box-sizing: border-box;
}

.bkbg-tst-wrap {
    border-radius: 12px;
    padding: 28px;
    margin: 0 auto;
}

.bkbg-tst-title {
    font-family: var(--bktst-tt-ff, inherit);
    font-size: var(--bktst-tt-fsd, 26px);
    line-height: var(--bktst-tt-lhd, 1.2);
    letter-spacing: var(--bktst-tt-lsd, normal);
    word-spacing: var(--bktst-tt-wsd, normal);
    font-weight: var(--bktst-tt-fw, 700);
    font-style: var(--bktst-tt-fst, normal);
    text-decoration: var(--bktst-tt-td, none);
    text-transform: var(--bktst-tt-tt, none);
    margin: 0 0 6px;
}

.bkbg-tst-subtitle {
    font-family: var(--bktst-st-ff, inherit);
    font-size: var(--bktst-st-fsd, 15px);
    line-height: var(--bktst-st-lhd, 1.4);
    letter-spacing: var(--bktst-st-lsd, normal);
    word-spacing: var(--bktst-st-wsd, normal);
    font-weight: var(--bktst-st-fw, normal);
    font-style: var(--bktst-st-fst, normal);
    text-decoration: var(--bktst-st-td, none);
    text-transform: var(--bktst-st-tt, none);
    margin: 0 0 22px;
}

/* Stats row */
.bkbg-tst-stats {
    display: flex;
    gap: 12px;
    justify-content: space-between;
    flex-wrap: wrap;
    border-radius: 10px;
    padding: 18px 20px;
    margin-bottom: 14px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.bkbg-tst-stat {
    text-align: center;
    flex: 1;
    min-width: 70px;
}

.bkbg-tst-stat-val {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
    transition: color 0.2s;
}

.bkbg-tst-stat-lbl {
    font-size: 12px;
    margin-top: 3px;
    opacity: 0.65;
}

/* Timer ring */
.bkbg-tst-timer-ring {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto;
}

.bkbg-tst-timer-ring svg {
    position: absolute;
    top: 0; left: 0;
    transform: rotate(-90deg);
}

.bkbg-tst-timer-ring circle {
    fill: none;
    stroke-width: 4;
    stroke-linecap: round;
    transition: stroke-dashoffset 1s linear;
}

/* Difficulty buttons */
.bkbg-tst-diff-btns {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.bkbg-tst-diff-btn {
    border: none;
    border-radius: 6px;
    padding: 6px 18px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

/* Text display */
.bkbg-tst-text-box {
    border-radius: 10px;
    padding: 20px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 17px;
    line-height: 1.9;
    letter-spacing: 0.02em;
    min-height: 100px;
    margin-bottom: 14px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    user-select: none;
    position: relative;
    overflow: hidden;
}

.bkbg-tst-char {
    position: relative;
    display: inline;
}

.bkbg-tst-char-correct { }
.bkbg-tst-char-error   { border-radius: 2px; }
.bkbg-tst-char-cursor  {
    position: relative;
}
.bkbg-tst-char-cursor::before {
    content: '';
    position: absolute;
    left: 0;
    top: 2px;
    bottom: 2px;
    width: 2px;
    border-radius: 1px;
    animation: bkbg-tst-blink 1s step-end infinite;
}
@keyframes bkbg-tst-blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

/* Input */
.bkbg-tst-input {
    width: 100%;
    border-radius: 8px;
    padding: 14px;
    font-size: 15px;
    font-family: 'Courier New', Courier, monospace;
    resize: none;
    height: 80px;
    box-sizing: border-box;
    outline: none;
    border: 2px solid;
    transition: border-color 0.2s;
    margin-bottom: 16px;
}

.bkbg-tst-input:focus { box-shadow: 0 0 0 3px rgba(139,92,246,0.15); }

.bkbg-tst-input:disabled { opacity: 0.55; cursor: default; }

/* Actions */
.bkbg-tst-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.bkbg-tst-btn {
    border: none;
    border-radius: 8px;
    padding: 11px 28px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    color: #fff;
    transition: filter 0.15s, transform 0.1s;
}

.bkbg-tst-btn:hover { filter: brightness(0.9); transform: scale(1.02); }
.bkbg-tst-btn-outline { background: transparent !important; border: 2px solid; }

/* Results */
.bkbg-tst-results {
    display: none;
    text-align: center;
    padding: 28px 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    margin-bottom: 16px;
}

.bkbg-tst-results.bkbg-tst-show { display: block; }

.bkbg-tst-results-icon { font-size: 48px; margin-bottom: 10px; }

.bkbg-tst-results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 18px 0;
}

.bkbg-tst-result-item {
    border-radius: 8px;
    padding: 14px 10px;
}

.bkbg-tst-result-val {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.1;
}

.bkbg-tst-result-lbl {
    font-size: 12px;
    opacity: 0.65;
    margin-top: 4px;
}

.bkbg-tst-rank {
    display: inline-block;
    border-radius: 20px;
    padding: 5px 18px;
    font-size: 14px;
    font-weight: 700;
    margin-top: 8px;
    color: #fff;
}

/* Progress bar (time) */
.bkbg-tst-time-bar-wrap {
    height: 6px;
    border-radius: 3px;
    background: #e5e7eb;
    margin-bottom: 14px;
    overflow: hidden;
}

.bkbg-tst-time-bar {
    height: 100%;
    border-radius: 3px;
    transition: width 1s linear;
}

@media (max-width: 1024px) {
    .bkbg-tst-title {
        font-size: var(--bktst-tt-fst1, var(--bktst-tt-fsd, 26px));
        line-height: var(--bktst-tt-lht, var(--bktst-tt-lhd, 1.2));
        letter-spacing: var(--bktst-tt-lst, var(--bktst-tt-lsd, normal));
        word-spacing: var(--bktst-tt-wst, var(--bktst-tt-wsd, normal));
    }
    .bkbg-tst-subtitle {
        font-size: var(--bktst-st-fst1, var(--bktst-st-fsd, 15px));
        line-height: var(--bktst-st-lht, var(--bktst-st-lhd, 1.4));
        letter-spacing: var(--bktst-st-lst, var(--bktst-st-lsd, normal));
        word-spacing: var(--bktst-st-wst, var(--bktst-st-wsd, normal));
    }
}
@media (max-width: 767px) {
    .bkbg-tst-title {
        font-size: var(--bktst-tt-fsm, var(--bktst-tt-fst1, var(--bktst-tt-fsd, 26px)));
        line-height: var(--bktst-tt-lhm, var(--bktst-tt-lht, var(--bktst-tt-lhd, 1.2)));
        letter-spacing: var(--bktst-tt-lsm, var(--bktst-tt-lst, var(--bktst-tt-lsd, normal)));
        word-spacing: var(--bktst-tt-wsm, var(--bktst-tt-wst, var(--bktst-tt-wsd, normal)));
    }
    .bkbg-tst-subtitle {
        font-size: var(--bktst-st-fsm, var(--bktst-st-fst1, var(--bktst-st-fsd, 15px)));
        line-height: var(--bktst-st-lhm, var(--bktst-st-lht, var(--bktst-st-lhd, 1.4)));
        letter-spacing: var(--bktst-st-lsm, var(--bktst-st-lst, var(--bktst-st-lsd, normal)));
        word-spacing: var(--bktst-st-wsm, var(--bktst-st-wst, var(--bktst-st-wsd, normal)));
    }
}
@media (max-width: 480px) {
    .bkbg-tst-wrap { padding: 16px; }
    .bkbg-tst-text-box { font-size: 15px; }
    .bkbg-tst-results-grid { grid-template-columns: 1fr 1fr; }
    .bkbg-tst-stat-val { font-size: 22px; }
}