/* Daily Challenge */

.streak-bar {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.streak-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.streak-icon {
    font-size: 1.8rem;
}

.streak-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.streak-item strong {
    font-size: 1.5rem;
    color: var(--accent);
}

.challenge-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
}

.challenge-type {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.3rem 0.8rem;
    border-radius: 99px;
    margin-bottom: 1rem;
}

.challenge-title {
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.challenge-body .options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 1rem;
}

.challenge-body .option-btn {
    padding: 0.85rem 1rem;
    border-radius: 10px;
    border: 2px solid var(--card-border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.challenge-body .option-btn:hover {
    border-color: var(--accent);
}

.challenge-body .option-btn.correct {
    background: #4caf50;
    color: #fff;
    border-color: #4caf50;
}

.challenge-body .option-btn.wrong {
    background: #e53935;
    color: #fff;
    border-color: #e53935;
}

.challenge-body .scramble-tiles {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin: 1rem 0;
}

.challenge-body .scramble-tile {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.15s;
}

.challenge-body .scramble-tile:hover {
    transform: scale(1.1);
}

.challenge-body .scramble-tile.used {
    opacity: 0.3;
    cursor: default;
}

.challenge-body .answer-display {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    min-height: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.challenge-body .input-row {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.challenge-body .input-row input {
    width: 120px;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    border: 2px solid var(--card-border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
}

.challenge-body .input-row input:focus {
    outline: none;
    border-color: var(--accent);
}

.challenge-done {
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
}

.done-icon {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
}

@media (max-width: 480px) {
    .streak-bar {
        gap: 1rem;
    }

    .challenge-card {
        padding: 1.25rem;
    }

    .challenge-body .options-grid {
        grid-template-columns: 1fr;
    }
}