/* Add this to your theme's style.css or a custom CSS file */
:root {
    --light-blue-bg: #d9ebff;
    --light-red-bg: #ffe5e5;
    --primary-blue: #2c5282;
    --text-dark: #2d3748;
    --text-light: #ffffff;
    --border-color: #e2e8f0;
    --bg-white: #ffffff;
}

.topic-navigation {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.topic-btn {
    flex: 1;
    max-width: 300px;
    padding: 1rem 2rem;
    font-family: 'Open Sans', Arial, sans-serif;
    font-size: 1rem;
    font-weight: 700;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
    text-decoration: none;
}

.topic-btn.previous {
    background-color: var(--light-blue-bg);
    color: var(--text-dark);
}

.topic-btn.current {
    background-color: var(--primary-blue);
    color: var(--text-light);
    border-color: var(--primary-blue);
}

.topic-btn.next {
    background-color: var(--light-red-bg);
    color: var(--text-dark);
}

.topic-btn:hover {
    transform: translateY(-1px);
    filter: brightness(95%);
}

.topic-btn.current:hover {
    filter: brightness(110%);
}

.topic-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

@media (max-width: 768px) {
    .topic-navigation {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .topic-btn {
        max-width: none;
        padding: 0.8rem 1rem;
    }
}