/* BrainBoost Homepage (Rich UI) */

.bb-home .hero-section {
    background: linear-gradient(135deg, #2c43bf 0%, #3c66f5 48%, #58adff 100%);
    color: #fff;
    padding: 3.5rem 2.5rem;
    border-radius: var(--bb-radius-lg);
    box-shadow: var(--bb-shadow-lg);
    position: relative;
    z-index: 3;
    isolation: isolate;
    overflow: hidden;
    margin-bottom: var(--bb-space-8);
}

.bb-home .hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.25), transparent 45%),
                radial-gradient(circle at 80% 30%, rgba(255, 255, 255, 0.2), transparent 50%);
    opacity: 0.8;
    pointer-events: none;
}

.bb-home .hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 820px;
    margin: 0 auto;
}

.bb-home .hero-title {
    font-family: var(--bb-font-display);
    font-size: clamp(2.2rem, 3.2vw, 3rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.bb-home .hero-title .text-warning {
    color: var(--bb-accent) !important;
}

.bb-home .hero-subtitle {
    font-size: 1.05rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.85);
}

.bb-home .search-container {
    position: relative;
    max-width: 640px;
    margin: 0 auto;
}

.bb-home .main-search-input {
    width: 100%;
    padding: 0.9rem 3.2rem 0.9rem 1.3rem;
    border-radius: var(--bb-radius-full);
    border: 1px solid rgba(255, 255, 255, 0.3);
    font-size: 1rem;
    background: #fff;
    color: var(--bb-gray-900);
    box-shadow: var(--bb-shadow-sm);
    transition: all var(--bb-transition-base);
}

.bb-home .main-search-input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.25);
}

.bb-home .search-icon {
    position: absolute;
    right: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--bb-primary);
    font-size: 1.1rem;
    pointer-events: none;
}

.bb-home .filter-toggle-btn {
    margin-top: 1.3rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.5rem;
    border-radius: var(--bb-radius-full);
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    font-size: 0.9rem;
    cursor: pointer;
    position: relative;
    z-index: 4;
    transition: transform var(--bb-transition-base), background var(--bb-transition-base);
}

.bb-home .filter-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.bb-home .section-title {
    font-family: var(--bb-font-display);
    font-weight: 700;
    color: var(--bb-gray-900);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--bb-space-5);
}

.bb-home .section-icon {
    color: var(--bb-primary);
}

.bb-home .game-card {
    background: var(--bb-surface);
    border: var(--bb-card-border);
    border-radius: var(--bb-radius);
    box-shadow: var(--bb-shadow-sm);
    transition: transform var(--bb-transition-base), box-shadow var(--bb-transition-base);
}

.bb-home .game-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--bb-shadow-md);
}

.bb-home .game-card-body {
    padding: 1.5rem;
}

.bb-home .game-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(47, 86, 255, 0.1);
    color: var(--bb-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.bb-home .bb-resource-explorer {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(241, 246, 255, 0.95));
    border: 1px solid rgba(47, 86, 255, 0.12);
    border-radius: 24px;
    box-shadow: var(--bb-shadow-sm);
    padding: 1.5rem;
}

.bb-home .bb-resource-explorer__intro {
    margin-bottom: 1.25rem;
}

.bb-home .bb-resource-explorer__eyebrow {
    color: var(--bb-primary);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bb-home .bb-resource-explorer__title {
    color: var(--bb-gray-900);
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    font-weight: 700;
}

.bb-home .bb-resource-explorer__description {
    color: var(--bb-gray-600);
    max-width: 52rem;
}

.bb-home .bb-resource-explorer__label {
    display: inline-block;
    font-weight: var(--bb-font-semibold);
    color: var(--bb-gray-700);
    margin-bottom: 0.65rem;
    min-width: 140px;
}

.bb-home .bb-resource-explorer__form {
    margin: 0;
}

.bb-home #allUriSection select,
.bb-home #allUriSection .form-select,
.bb-home #uriDtoOne {
    width: 100%;
    min-height: 54px;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.45);
    box-shadow: none;
}

.bb-home #allUriSection:empty::before {
    content: "Loading resources...";
    color: var(--bb-gray-500);
    display: inline-flex;
    align-items: center;
    min-height: 54px;
}

.bb-home #allUriSection select:focus,
.bb-home #allUriSection .form-select:focus,
.bb-home #uriDtoOne:focus {
    border-color: rgba(47, 86, 255, 0.45);
    box-shadow: 0 0 0 0.25rem rgba(47, 86, 255, 0.12);
}

.bb-home .bb-resource-explorer__button {
    min-height: 54px;
    border-radius: 16px;
    background: var(--bb-primary);
    border: 1px solid var(--bb-primary);
    color: #fff;
    font-weight: 600;
}

.bb-home .bb-resource-explorer__button:hover {
    background: var(--bb-primary-hover);
    border-color: var(--bb-primary-hover);
    color: #fff;
}

.bb-home .bb-resource-results {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 24px;
    box-shadow: var(--bb-shadow-sm);
    padding: 1.5rem;
}

.bb-home .bb-resource-results__header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    margin-bottom: 1.25rem;
    padding-bottom: 0.9rem;
}

.bb-home .bb-resource-results__title {
    color: var(--bb-gray-900);
    font-weight: 700;
}

.bb-home .bb-resource-results__subtitle {
    color: var(--bb-gray-500);
    font-size: 0.92rem;
}

.bb-home .bb-mcq-feed-heading {
    color: var(--bb-primary);
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    font-family: var(--bb-font-display);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0;
    padding-bottom: 0.75rem;
}

.bb-home .bb-mcq-feed-card {
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 24px;
    overflow: hidden;
}

.bb-home .bb-mcq-feed-card__body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1.25rem;
}

.bb-home .bb-mcq-feed-card__badge,
.bb-home .bb-mcq-feed-card__type {
    flex-shrink: 0;
}

.bb-home .bb-mcq-feed-card__title {
    display: -webkit-box;
    line-height: 1.45;
    min-height: 5.8em;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
}

.bb-home .bb-mcq-feed-card__link {
    color: var(--bb-gray-900);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.bb-home .bb-mcq-feed-card__lesson {
    display: -webkit-box;
    overflow: hidden;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.bb-home .bb-mcq-feed-card__footer {
    padding: 0 1.25rem 1.25rem;
}

.bb-home .hover-lift {
    transition: transform var(--bb-transition-base), box-shadow var(--bb-transition-base);
}

.bb-home .hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--bb-shadow-md);
}

@media (max-width: 768px) {
    .bb-home .hero-section {
        padding: 2.5rem 1.5rem;
    }

    .bb-home .bb-resource-explorer,
    .bb-home .bb-resource-results {
        padding: 1.1rem;
        border-radius: 20px;
    }

    .bb-home .bb-resource-results__header {
        align-items: flex-start;
        flex-direction: column;
    }
}

.bb-home .bb-home-sidebar {
    position: sticky;
    top: 92px;
    align-self: flex-start;
}

.bb-home .bb-sidebar-ad-card {
    border: var(--bb-card-border);
}

.bb-home .bb-sidebar-ad-body {
    padding: 0.5rem;
}

.bb-home .bb-sidebar-ad-body .bb-ad-slot--vertical {
    min-height: 300px;
}

.bb-home .bb-home-sidebar--left {
    top: 92px;
}

.bb-home .bb-managed-ad-shell {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.02), rgba(47, 86, 255, 0.08));
    border: 1px solid rgba(47, 86, 255, 0.12);
    border-radius: 24px;
    padding: 0.75rem;
    box-shadow: var(--bb-shadow-sm);
}

.bb-home .bb-managed-carousel .carousel-inner {
    border-radius: 18px;
    overflow: hidden;
}

.bb-home .bb-managed-ad-link {
    display: block;
    background: #f8fafc;
}

.bb-home .bb-managed-ad-image {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    display: block;
}

.bb-home .bb-forum-carousel {
    min-height: 168px;
}

.bb-home .bb-recent-post-card {
    background: linear-gradient(135deg, #ffffff, #f8fbff);
    border: 1px solid rgba(47, 86, 255, 0.1);
    border-radius: 20px;
    padding: 1rem;
    box-shadow: var(--bb-shadow-sm);
    min-height: 150px;
}

.bb-home .bb-recent-post-title {
    color: var(--bb-gray-900);
    font-weight: 700;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bb-home .bb-recent-post-meta {
    font-size: 0.82rem;
    color: var(--bb-gray-600);
}

@media (max-width: 1199px) {
    .bb-home .bb-sidebar-ad-body .bb-ad-slot--vertical {
        min-height: 250px;
    }
}

@media (max-width: 991px) {
    .bb-home .bb-home-sidebar {
        position: static;
        top: auto;
    }

    .bb-home .bb-managed-ad-shell {
        margin-bottom: 1rem;
    }
}

/* ── Grade Navigation Pills ─────────────────────────────────────────────────── */
.bb-home .bb-grade-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 0.85rem 1.25rem;
    background: var(--bb-surface);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 20px;
    box-shadow: var(--bb-shadow-sm);
}

.bb-home .bb-grade-nav__label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--bb-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    white-space: nowrap;
    flex-shrink: 0;
}

.bb-home .bb-grade-nav__pills {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.bb-home .bb-grade-pill {
    padding: 0.35rem 1rem;
    border-radius: var(--bb-radius-full);
    border: 1px solid rgba(47, 86, 255, 0.25);
    background: white;
    color: var(--bb-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--bb-transition-base);
    line-height: 1.4;
}

.bb-home .bb-grade-pill:hover,
.bb-home .bb-grade-pill.active {
    background: var(--bb-primary);
    color: white;
    border-color: var(--bb-primary);
}

/* ── Subject Cards Grid ─────────────────────────────────────────────────────── */
.bb-home .bb-subject-card {
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 20px;
    padding: 1.25rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    transition: transform var(--bb-transition-base), box-shadow var(--bb-transition-base);
    min-height: 120px;
    justify-content: space-between;
    user-select: none;
}

.bb-home .bb-subject-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.bb-home .bb-subject-card:focus-visible {
    outline: 3px solid var(--bb-primary);
    outline-offset: 2px;
}

.bb-home .bb-subject-card--skeleton {
    background: linear-gradient(90deg, #f0f4f8 25%, #e4eaf0 50%, #f0f4f8 75%);
    background-size: 200% 100%;
    animation: bb-shimmer 1.4s ease-in-out infinite;
    border-radius: 20px;
    min-height: 120px;
    border: none;
}

@keyframes bb-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.bb-home .bb-subject-card__icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.bb-home .bb-subject-card__name {
    font-weight: 700;
    font-size: 0.92rem;
    line-height: 1.35;
    flex: 1;
    word-break: break-word;
}

.bb-home .bb-subject-card__arrow {
    opacity: 0.4;
    transition: opacity var(--bb-transition-base), transform var(--bb-transition-base);
    align-self: flex-end;
}

.bb-home .bb-subject-card:hover .bb-subject-card__arrow {
    opacity: 1;
    transform: translateX(3px);
}

/* ── Recently Added MCQs — Horizontal Scroll ────────────────────────────────── */
.bb-home .bb-recent-mcq-row {
    display: flex;
    gap: 1rem;
    overflow-x: auto;
    padding-bottom: 0.75rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(47, 86, 255, 0.25) transparent;
}

.bb-home .bb-recent-mcq-row::-webkit-scrollbar {
    height: 4px;
}

.bb-home .bb-recent-mcq-row::-webkit-scrollbar-track {
    background: transparent;
}

.bb-home .bb-recent-mcq-row::-webkit-scrollbar-thumb {
    background: rgba(47, 86, 255, 0.25);
    border-radius: 4px;
}

.bb-home .bb-recent-mcq-card {
    flex: 0 0 220px;
    background: var(--bb-surface);
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 18px;
    padding: 1.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    transition: transform var(--bb-transition-base), box-shadow var(--bb-transition-base);
    color: inherit;
}

.bb-home .bb-recent-mcq-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--bb-shadow-md);
    color: inherit;
}

.bb-home .bb-recent-mcq-card__type {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

.bb-home .bb-recent-mcq-card__title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--bb-gray-900);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
    flex: 1;
}

.bb-home .bb-recent-mcq-card__meta {
    font-size: 0.78rem;
    color: var(--bb-gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bb-home .bb-recent-mcq-card__subject {
    font-weight: 600;
    color: var(--bb-primary);
}

@media (max-width: 576px) {
    .bb-home .bb-grade-nav {
        padding: 0.7rem 1rem;
    }

    .bb-home .bb-recent-mcq-card {
        flex: 0 0 180px;
    }

    .bb-home .bb-subject-card {
        min-height: 100px;
        padding: 1rem;
    }
}