.arena-controls {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.arena-prompt-filter {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.arena-prompt-filter label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
}

.arena-prompt-filter select {
    min-width: 200px;
    padding: 0.65rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--card-bg-solid);
    color: var(--text-primary);
    font-family: inherit;
}

.btn-arena-next {
    padding: 0.7rem 1.5rem;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-arena-next:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--primary-glow);
}

.arena-prompt-card {
    background: var(--card-bg-solid);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
}

.arena-prompt-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
}

.arena-prompt-card p {
    margin: 0.5rem 0;
    font-size: 1rem;
    line-height: 1.6;
}

.arena-category-badge {
    display: inline-block;
    font-size: 0.72rem;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    background: var(--primary-glow);
    color: var(--primary-color);
    font-weight: 600;
}

.arena-duel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

@media (max-width: 768px) {
    .arena-duel-grid {
        grid-template-columns: 1fr;
    }
}

.arena-panel {
    background: var(--card-bg-solid);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: border-color 0.2s ease;
}

.arena-panel h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    margin: 0;
}

.arena-response {
    flex: 1;
    margin: 0;
    padding: 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-family: 'Inter', monospace;
    font-size: 0.82rem;
    line-height: 1.55;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 320px;
    overflow-y: auto;
}

.btn-vote {
    padding: 0.65rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-vote:hover {
    background: var(--primary-color);
    color: #fff;
}

.arena-panel.winner-pick {
    border-color: var(--success-color);
    box-shadow: 0 0 0 1px var(--success-color);
}

.arena-tie-row {
    text-align: center;
    margin: 1.25rem 0 2rem;
}

.btn-tie {
    padding: 0.5rem 1.25rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    cursor: pointer;
}

.btn-tie:hover {
    border-color: var(--text-tertiary);
    color: var(--text-primary);
}

.arena-empty {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary);
}

.arena-leaderboard-section {
    margin-top: 3rem;
}

.arena-elo-table td:nth-child(4) {
    font-weight: 700;
    color: var(--primary-color);
}