/* Practice Container & Header */
.practice-container {
    width: 100%;
    max-width: 440px;
}

.practice-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    position: relative;
}

.practice-header-actions {
    display: flex;
    gap: 8px;
}

.header-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #18181b;
    border: 1px solid #27272a;
    border-radius: 10px;
    color: #a1a1aa;
    cursor: pointer;
    transition: all 0.15s ease;
}

.header-btn:hover {
    background: #27272a;
    color: #fafafa;
}

.header-btn svg {
    width: 20px;
    height: 20px;
}

/* Tone Buttons */
.tone-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.tone-btn {
    padding: 20px 16px;
    border-radius: 12px;
    border: 1px solid #27272a;
    background: #18181b;
    color: #fafafa;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.tone-btn:hover:not(:disabled) {
    background: #27272a;
    border-color: #3f3f46;
}

.tone-btn:active:not(:disabled) {
    background: #18181b;
}

.tone-btn:disabled {
    cursor: default;
}

.tone-btn.correct {
    background: rgba(34, 197, 94, 0.1);
    border-color: #22c55e;
}

.tone-btn.correct .tone-number,
.tone-btn.correct .tone-mark,
.tone-btn.correct .tone-name {
    color: #22c55e;
}

.tone-btn.incorrect {
    background: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
}

.tone-btn.incorrect .tone-number,
.tone-btn.incorrect .tone-mark,
.tone-btn.incorrect .tone-name {
    color: #ef4444;
}

.tone-number {
    font-size: 20px;
    font-weight: 600;
    color: #fafafa;
}

.tone-mark {
    font-size: 22px;
    color: #a1a1aa;
    font-weight: 500;
}

.tone-name {
    font-size: 10px;
    color: #52525b;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Mobile */
@media (max-width: 768px) {
    .tone-btn {
        padding: 16px 12px;
    }

    .tone-number {
        font-size: 18px;
    }

    .tone-mark {
        font-size: 20px;
    }
}