.dgk-period-selector {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.dgk-period-btn {
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.5);
    background: rgba(255,255,255,0.15);
    color: inherit;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
}

.dgk-period-btn.active,
.dgk-period-btn:hover {
    background: #1565c0;
    color: #fff;
    border-color: #1565c0;
}

.dgk-leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}

.dgk-leaderboard-table th,
.dgk-leaderboard-table td {
    padding: 10px 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.dgk-leaderboard-table th {
    background: #f8f9fa;
    font-weight: 600;
    font-size: 13px;
}

/* Pro question types: Fill in the Blank */
.dgkpro-fillblank {
    padding: 10px 0;
}

.dgkpro-fillblank-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text, #2c3e50);
}

.dgkpro-fillblank-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 1.05em;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    box-sizing: border-box;
}

.dgkpro-fillblank-input:focus {
    outline: none;
    border-color: var(--primary, #7d3cff);
}

/* Pro question types: Matching */
.dgkpro-matching-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px;
    margin-bottom: 10px;
    background: #f9f9fb;
    border-radius: 8px;
}

.dgkpro-matching-left {
    flex: 1;
    font-weight: 600;
}

.dgkpro-matching-select {
    flex: 1;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid #d5d5d5;
}

/* Pro question types: Image Quiz */
.dgkpro-image-quiz-question-image img {
    max-width: 100%;
    max-height: 280px;
    border-radius: 10px;
    margin-bottom: 16px;
    display: block;
}

.dgkpro-image-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.dgkpro-image-option {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 14px;
    gap: 8px;
}

.dgkpro-image-option-img {
    width: 100%;
    max-height: 140px;
    object-fit: cover;
    border-radius: 8px;
}

@media (max-width: 600px) {
    .dgkpro-image-options-grid {
        grid-template-columns: 1fr;
    }
}