/**
 * Topic MCQ practice – hero, breadcrumb, topic overview cards
 */

/* ==================== TOPIC HERO SECTION ==================== */
.topic-hero {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-12) 0;
    position: relative;
    overflow: hidden;
    min-height: 280px;
    display: flex;
    align-items: center;
    border-radius: 0;
    margin-bottom: var(--space-8);
}

/* MCQ Icons Background Pattern */
.topic-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-opacity='0.1' stroke-width='1.5'%3E%3Cpath d='M9 5H7a2 2 0 0 0-2 2v12a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V7a2 2 0 0 0-2-2h-2M9 5a2 2 0 0 0 2 2h2a2 2 0 0 0 2-2M9 5a2 2 0 0 1 2-2h2a2 2 0 0 1 2 2m-6 9h2m-2 4h4'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-position: 0 0, 20px 30px, 40px 60px;
    background-size: 80px 80px, 70px 70px, 60px 60px;
    opacity: 0.3;
    animation: topicFloat 40s linear infinite;
}

.topic-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

@keyframes topicFloat {
    0% { transform: translateY(0) translateX(0); }
    100% { transform: translateY(-50px) translateX(-30px); }
}

.topic-hero .container {
    position: relative;
    z-index: 2;
}

.topic-hero h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--space-4);
    color: var(--color-white);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.02em;
}

.topic-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-2);
}

.topic-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-white);
    font-size: var(--font-size-base);
    opacity: 0.95;
}

.topic-meta-item i {
    font-size: var(--font-size-base);
}

.topic-difficulty-badge {
    padding: var(--space-1) var(--space-7);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.topic-stats-badge {
    background: rgba(255, 255, 255, 0.15);
    color: var(--color-white);
    padding: var(--space-1) var(--space-7);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.topic-stats-badge i {
    font-size: var(--font-size-xs);
}

.topic-header-actions {
    display: flex;
    justify-content: flex-end;
}

.topic-header-actions .btn-light {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--color-white);
    padding: var(--space-7) var(--space-6);
    border-radius: 8px;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.topic-header-actions .btn-light:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

/* ==================== BREADCRUMB ==================== */
.breadcrumb-wrapper {
    margin-bottom: var(--space-5);
}

.breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-item {
    font-size: var(--font-size-sm);
}

.breadcrumb-item a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: var(--font-weight-medium);
}

.breadcrumb-item a:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: var(--color-neutral-muted);
}

.breadcrumb-item + .breadcrumb-item::before {
    color: var(--color-neutral-muted);
    content: "»";
    font-size: var(--font-size-lg);
    line-height: 1;
}

/* ==================== DESCRIPTION CARDS ==================== */
.description-card {
    background: var(--color-white);
    border-radius: 10px;
    padding: var(--space-5);
    margin-bottom: var(--space-5);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-neutral-border-light);
}

.description-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-7);
}

.description-header h5 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-neutral-text);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.description-header h5 i {
    color: var(--color-primary);
}

.description-toggle {
    background: transparent;
    border: none;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: 0;
    cursor: pointer;
}

.description-toggle:hover {
    color: var(--color-secondary);
}

.description-preview {
    color: var(--color-neutral-muted);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-bottom: 0;
}

.description-full {
    background: var(--color-white);
    border-radius: 10px;
    padding: var(--space-5);
    margin-bottom: var(--space-5);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-neutral-border-light);
    display: none;
}

.description-full.show {
    display: block;
}

.description-full p {
    color: var(--color-neutral-muted);
    font-size: var(--font-size-base);
    line-height: 1.8;
    margin-bottom: 0;
}