/* ==========================================
   LABS PAGE STYLES
   ========================================== */

/* Labs Hero Section */
.labs-hero {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--secondary-purple) 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.labs-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.03) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.03) 75%);
    background-size: 60px 60px;
    pointer-events: none;
}

.labs-hero .container {
    position: relative;
    z-index: 1;
}

.labs-hero-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 24px;
    line-height: 1.3;
}

/* Labs Content Section */
.labs-content {
    padding: 40px 0 80px;
    background-color: var(--off-white);
}

.labs-header {
    margin-bottom: 8px;
}

.labs-subtitle {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
}

/* Sort & Display Controls Bar */
.labs-controls {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sort-controls label {
    font-size: 13px;
    color: var(--text-gray);
    font-weight: 500;
}

.control-select {
    padding: 8px 32px 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-dark);
    background: var(--white);
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
}

.control-select:focus {
    border-color: var(--primary-purple);
    outline: none;
}

.display-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-gray);
    font-weight: 500;
}

.display-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--white);
    color: var(--text-gray);
    cursor: pointer;
    transition: var(--transition);
}

.display-btn:hover,
.display-btn.active {
    background: var(--primary-purple);
    color: var(--white);
    border-color: var(--primary-purple);
}


/* ==========================================
   SIDEBAR + GRID LAYOUT
   ========================================== */

.labs-main {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
    align-items: start;
}

/* Filter Sidebar */
.filter-sidebar {
    position: sticky;
    top: 100px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.filter-header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--primary-purple);
}

.filter-header svg {
    color: var(--primary-purple);
}

/* Filter Groups */
.filter-group {
    margin-bottom: 20px;
}

.filter-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

/* Filter Select Dropdowns */
.filter-select {
    width: 100%;
    padding: 10px 36px 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-dark);
    background: var(--off-white);
    cursor: pointer;
    transition: var(--transition);
    box-sizing: border-box;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

/* Tag Searchable Select */
.tag-select {
    position: relative;
}

.tag-selected-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 0;
}

.tag-selected-chips:empty {
    display: none;
}

.tag-selected-chips:not(:empty) {
    margin-bottom: 6px;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    background: var(--primary-purple);
    color: #fff;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
    line-height: 1.3;
}

.tag-chip-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    border: none;
    background: rgba(255,255,255,0.25);
    color: #fff;
    border-radius: 50%;
    font-size: 10px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
}

.tag-chip-remove:hover {
    background: rgba(255,255,255,0.45);
}

.tag-search-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-dark);
    background: var(--off-white);
    box-sizing: border-box;
    transition: var(--transition);
}

.tag-search-input:focus {
    border-color: var(--primary-purple);
    outline: none;
    background: var(--white);
}

.tag-dropdown {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: 180px;
    overflow-y: auto;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    z-index: 50;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.tag-dropdown.open {
    display: block;
}

.tag-dropdown-item {
    padding: 7px 12px;
    font-size: 13px;
    color: var(--text-dark);
    cursor: pointer;
    transition: background 0.15s;
}

.tag-dropdown-item:hover {
    background: var(--off-white);
    color: var(--primary-purple);
}

.tag-dropdown-empty {
    padding: 8px 12px;
    font-size: 12px;
    color: var(--text-gray);
}

.filter-select:focus {
    border-color: var(--primary-purple);
    outline: none;
    background: var(--white);
}

.filter-select:hover {
    border-color: var(--primary-purple);
}

/* Filter Checkbox */
.filter-checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-gray);
    transition: var(--transition);
}

.filter-checkbox-item:hover {
    color: var(--primary-purple);
}

.filter-checkbox-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-purple);
    cursor: pointer;
    flex-shrink: 0;
}

.filter-checkbox-item span {
    line-height: 1.3;
}

/* Submit / Clear Button */
.filter-submit {
    width: 100%;
    margin-top: 8px;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
}

/* ==========================================
   LABS GRID
   ========================================== */

.labs-grid-container {
    min-width: 0;
}

.labs-grid-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.labs-grid {
    display: grid;
    gap: 24px;
}

.labs-grid-3col {
    grid-template-columns: repeat(3, 1fr);
}

/* List View */
.labs-grid-list {
    grid-template-columns: 1fr;
}

.labs-grid-list .lab-card {
    flex-direction: row;
}

.labs-grid-list .lab-card-thumbnail {
    width: 260px;
    min-width: 260px;
    height: auto;
}

.labs-grid-list .lab-card-content {
    padding: 20px 24px;
}

.labs-grid-list .lab-card-footer {
    border-top: none;
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    justify-content: center;
    padding: 20px 24px;
    min-width: 160px;
}

/* Load More */
.labs-load-more {
    text-align: center;
    margin-top: 32px;
}

/* ==========================================
   LAB CARD (matches design)
   ========================================== */

.lab-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.lab-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

/* Card Thumbnail */
.lab-card-thumbnail {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.lab-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.lab-card:hover .lab-card-thumbnail img {
    transform: scale(1.05);
}

/* Subtle gradient overlay for text readability */
.lab-thumb-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(0,0,0,0.35) 0%,
        rgba(0,0,0,0.0) 40%,
        rgba(0,0,0,0.0) 60%,
        rgba(0,0,0,0.4) 100%
    );
    pointer-events: none;
    z-index: 1;
}

/* Category label — top left with accent bar */
.lab-thumb-category {
    position: absolute;
    top: 12px;
    left: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 0;
    padding: 5px 14px 5px 10px;
    background: var(--cat-color);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border-radius: 0 6px 6px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

/* Credits badge — top right */
.lab-thumb-credits {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(0,0,0,0.55);
    backdrop-filter: blur(6px);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    border-radius: 50px;
    letter-spacing: 0.3px;
}

.lab-thumb-credits svg {
    opacity: 0.9;
}

.lab-thumb-credits-free {
    background: rgba(16,185,129,0.85);
}

/* Level badge — bottom left, frosted glass */
.lab-thumb-level {
    position: absolute;
    bottom: 10px;
    left: 10px;
    z-index: 2;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    text-transform: capitalize;
    backdrop-filter: blur(6px);
}

.lab-thumb-level.badge-level-beginner {
    background: rgba(16,185,129,0.85);
    color: #fff;
}

.lab-thumb-level.badge-level-intermediate {
    background: rgba(245,158,11,0.85);
    color: #fff;
}

.lab-thumb-level.badge-level-advanced {
    background: rgba(220,38,38,0.85);
    color: #fff;
}

/* Draft badge — top center, for unpublished/unvetted labs (admin preview only) */
.lab-thumb-draft {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    padding: 4px 16px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(220,38,38,0.9);
    color: #fff;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,0.2);
}

/* Legacy badge classes (used in sidebar/details) */
.lab-badge {
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-level-advanced {
    background: #DC2626;
    color: #fff;
}

.badge-level-intermediate {
    background: #F59E0B;
    color: #fff;
}

.badge-level-beginner {
    background: #10B981;
    color: #fff;
}

.badge-free {
    background: #10B981;
    color: #fff;
}

.badge-credits {
    background: linear-gradient(135deg, #7C3AED, #6D28D9);
    color: #fff;
}

/* Card Content */
.lab-card-content {
    padding: 16px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.lab-card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
    line-height: 1.4;
}

.lab-card-title a {
    color: inherit;
    transition: var(--transition);
}

.lab-card-title a:hover {
    color: var(--primary-purple);
}

.lab-card-description {
    font-size: 13px;
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

/* Card Tags */
.lab-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.lab-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: #6d28d9;
    background: #f3eaff;
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid #e0cfff;
    line-height: 1.3;
}

/* Card Social Proof (rating + enrolled) */
.lab-card-social {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-top: 10px;
    margin-top: auto;
}

.lab-social-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-gray);
}

.lab-social-rating {
    color: #b45309;
}

.lab-social-enrolled svg {
    opacity: 0.5;
}

.lab-social-divider {
    width: 1px;
    height: 12px;
    background: var(--border-color);
}

/* Card Footer */
.lab-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
}

.lab-card-link {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-purple);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.lab-card-link:hover {
    gap: 10px;
}

.lab-card-meta {
    display: flex;
    gap: 12px;
}

.lab-meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-gray);
}

.lab-meta-item svg {
    color: var(--text-light);
}

/* No Results */
.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--text-gray);
}

.no-results svg {
    color: var(--border-color);
    margin-bottom: 20px;
}

.no-results h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.no-results p {
    margin-bottom: 20px;
}

/* Loading */
.loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
    font-size: 16px;
}

.error-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-gray);
}


/* ==========================================
   LAB DETAILS PAGE (OVERVIEW)
   ========================================== */

/* Lab Details Hero */
.lab-hero {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--secondary-purple) 100%);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.lab-hero-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.03) 25%, transparent 25%);
    background-size: 60px 60px;
    pointer-events: none;
}

.lab-hero .container {
    position: relative;
    z-index: 1;
}

.lab-hero-title {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    font-size: 38px;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    letter-spacing: -0.8px;
}

.lab-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 20px;
}

.lab-hero-category {
    display: inline-block;
    padding: 5px 16px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    background: var(--cat-color);
    color: #fff;
}

.lab-hero-sep {
    width: 1px;
    height: 20px;
    background: rgba(255,255,255,0.3);
}

.lab-hero-level {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.lab-hero-provider {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,0.9);
    font-size: 13px;
    font-weight: 500;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(4px);
    padding: 5px 14px;
    border-radius: 20px;
}

.lab-hero-provider .provider-icon {
    width: 18px;
    height: 18px;
}

.lab-hero-duration {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: rgba(255,255,255,0.9);
    font-size: 13px;
    font-weight: 500;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(4px);
    padding: 5px 14px;
    border-radius: 20px;
}

.lab-hero-duration svg {
    flex-shrink: 0;
}

.lab-hero-rating {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #fbbf24;
    font-size: 13px;
    font-weight: 600;
    background: rgba(251,191,36,0.15);
    backdrop-filter: blur(4px);
    padding: 5px 14px;
    border-radius: 20px;
}

.lab-hero-enrolled {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: rgba(255,255,255,0.9);
    font-size: 13px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(4px);
    padding: 5px 14px;
    border-radius: 20px;
}

.lab-hero-enrolled svg {
    flex-shrink: 0;
    opacity: 0.7;
}

/* Lab Details Content */
.lab-details-content {
    padding: 32px 0 80px;
    background-color: var(--off-white);
}

/* Back Button */
.back-to-labs {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-purple);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
    padding: 10px 16px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.back-to-labs:hover {
    background: var(--primary-purple);
    color: var(--white);
    transform: translateX(-4px);
}

/* Lab Overview Two-Column Layout */
.lab-overview-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 40px;
    align-items: start;
}

/* Main Content */
.lab-overview-main {
    min-width: 0;
}

/* Quick Stats Row */
.lab-stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.lab-stat-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--white);
    border-radius: 14px;
    padding: 18px 20px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.lab-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.06);
}

.lab-stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.lab-stat-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.lab-stat-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lab-stat-value {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    white-space: nowrap;
}

/* Lab Section */
.lab-section {
    margin-bottom: 36px;
    background: var(--white);
    border-radius: 16px;
    padding: 32px 36px;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 4px rgba(0,0,0,0.03);
}

.lab-section-title {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    font-size: 22px;
    font-weight: 800;
    color: #1e1b4b;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #f3f0ff;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.4px;
}

.lab-section-title svg {
    color: var(--primary-purple);
    flex-shrink: 0;
}

/* Lab Description Section */
.lab-description-section {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.lab-desc-block {
    padding: 20px 24px;
    border-radius: 12px;
    margin-top: 20px;
}

.lab-desc-block.scenario {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    border-left: 4px solid var(--primary-purple, #7C3AED);
}

.lab-desc-block.mission {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-left: 4px solid #22c55e;
}

.lab-desc-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 12px;
    padding: 4px 10px;
    border-radius: 6px;
}

.lab-desc-block.scenario .lab-desc-label {
    color: var(--primary-purple, #7C3AED);
    background: rgba(124, 58, 237, 0.1);
}

.lab-desc-block.mission .lab-desc-label {
    color: #16a34a;
    background: rgba(22, 163, 74, 0.1);
}

.lab-desc-content {
    font-size: 16px;
    line-height: 1.85;
    letter-spacing: 0.01em;
    margin: 0;
}

.lab-desc-content + .lab-desc-content {
    margin-top: 16px;
}

.lab-desc-block.scenario .lab-desc-content {
    color: #1e1b4b;
    font-weight: 450;
}

.lab-desc-block.mission .lab-desc-content {
    color: #374151;
    font-weight: 400;
}

/* Lab Objectives */
.lab-objectives-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.lab-objectives-list li {
    position: relative;
    padding: 13px 18px 13px 46px;
    font-size: 14px;
    color: #4b5563;
    line-height: 1.7;
    background: #f9fafb;
    border-radius: 10px;
    border-left: 3px solid var(--primary-purple);
    transition: background 0.2s;
    letter-spacing: 0.01em;
}

.lab-objectives-list li:hover {
    background: #f3f0ff;
}

.lab-objectives-list li::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 16px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid var(--primary-purple);
    background: var(--white);
}

.lab-objectives-list li.checked::before {
    background: var(--primary-purple);
    border-color: var(--primary-purple);
}

.lab-objectives-list li.checked::after {
    content: '\2713';
    position: absolute;
    left: 18px;
    top: 17px;
    color: var(--white);
    font-size: 11px;
    font-weight: bold;
}

/* TechStack Accordion */
.tech-accordion {
    display: flex;
    flex-direction: column;
}

.tech-accordion-item {
    border: 1px solid var(--border-color);
    border-bottom: none;
}

.tech-accordion-item:last-child {
    border-bottom: 1px solid var(--border-color);
}

.tech-accordion-item:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.tech-accordion-item:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.tech-accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    border: none;
    text-align: left;
    font-size: 14.5px;
    font-weight: 600;
    color: var(--text-dark);
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
}

.tech-accordion-item.expanded .tech-accordion-header {
    background: var(--primary-purple);
    color: var(--white);
}

.tech-accordion-icon {
    transition: transform 0.3s ease;
    color: var(--text-gray);
    flex-shrink: 0;
}

.tech-accordion-item.expanded .tech-accordion-icon {
    transform: rotate(180deg);
    color: var(--white);
}

.tech-accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background: var(--off-white);
}

.tech-accordion-item.expanded .tech-accordion-body {
    max-height: 500px;
    padding: 16px 20px;
}

.tech-accordion-body p {
    font-size: 14px;
    color: #4b5563;
    line-height: 1.75;
    margin: 0;
}

/* Prerequisites */
.prerequisites-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.prerequisites-list li {
    position: relative;
    padding: 12px 16px 12px 40px;
    font-size: 14px;
    color: #4b5563;
    line-height: 1.65;
    background: #f9fafb;
    border-radius: 8px;
    letter-spacing: 0.01em;
}

.prerequisites-list li::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 16px;
    width: 14px;
    height: 14px;
    border-radius: 3px;
    background: rgba(124,58,237,0.12);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%237C3AED' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 10px;
    line-height: 1;
    top: 10px;
}

/* Right Sidebar */
.lab-overview-sidebar {
    position: sticky;
    top: 88px;
}

.lab-sidebar-card {
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.1);
    overflow: hidden;
}

.lab-sidebar-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    margin: 0;
    padding: 0;
}

.lab-sidebar-body {
    padding: 24px;
}

/* Sidebar tags (category + mode) */
.lab-sidebar-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.lab-sidebar-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    letter-spacing: 0.02em;
}

.lab-sidebar-tag.category {
    background: var(--cat-bg, #f3f0ff);
    color: var(--cat-color, #7C3AED);
}

.lab-sidebar-tag.mode {
    background: #f0f9ff;
    color: #0369a1;
}

/* Sidebar Price / Credits Display */
.lab-sidebar-price {
    text-align: center;
    margin-bottom: 16px;
    padding: 16px 0;
    border-top: 1px solid #f3f4f6;
    border-bottom: 1px solid #f3f4f6;
}

.lab-sidebar-price-value {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.lab-sidebar-price-value.paid {
    color: #1e1b4b;
}

.lab-sidebar-price-value.free {
    color: #059669;
}

.lab-sidebar-price-value svg {
    vertical-align: -3px;
    margin-right: 4px;
}

.lab-sidebar-price-label {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* Sidebar Cost Estimate */
.lab-sidebar-cost-estimate {
    text-align: center;
    padding: 8px 0 12px;
    margin-bottom: 8px;
}
.lab-sidebar-cost-label {
    display: block;
    font-size: 11px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
}
.lab-sidebar-cost-value {
    font-size: 16px;
    font-weight: 700;
    color: #059669;
}

/* Start Lab Button */
.start-lab-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 15px 24px;
    background: linear-gradient(135deg, #7C3AED 0%, #6D28D9 100%);
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    font-size: 15px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.start-lab-btn:hover {
    background: linear-gradient(135deg, #6D28D9 0%, #5B21B6 100%);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124,58,237,0.4);
}

.start-lab-btn svg {
    flex-shrink: 0;
    transition: transform 0.2s;
}

.start-lab-btn:hover svg {
    transform: translateX(3px);
}

/* Share */
.lab-sidebar-share {
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.lab-sidebar-share h5 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.share-icons {
    display: flex;
    gap: 10px;
}

.share-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--off-white);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-gray);
    transition: var(--transition);
}

.share-icon:hover {
    background: var(--primary-purple);
    color: var(--white);
}

/* Lab Content Container */
#lab-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    padding: 40px;
}

/* Related Labs */
.related-labs-section {
    margin-top: 40px;
}

.related-labs-section h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

#related-labs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.related-lab-card {
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.related-lab-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.related-lab-level {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.related-lab-card h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.4;
}

.related-lab-card h4 a {
    color: inherit;
    transition: var(--transition);
}

.related-lab-card h4 a:hover {
    color: var(--primary-purple);
}

.related-lab-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--text-gray);
}

.level-beginner { background: #D1FAE5; color: #065F46; }
.level-intermediate { background: #FEF3C7; color: #92400E; }
.level-advanced { background: #FEE2E2; color: #991B1B; }

/* ==========================================
   AUTH GATE MODAL
   ========================================== */

#auth-gate-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
}

#auth-gate-modal.active {
    opacity: 1;
}

.auth-gate-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.auth-gate-card {
    position: relative;
    background: #fff;
    border-radius: 16px;
    padding: 40px 36px 36px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

#auth-gate-modal.active .auth-gate-card {
    transform: translateY(0);
}

.auth-gate-close {
    position: absolute;
    top: 14px;
    right: 16px;
    background: none;
    border: none;
    font-size: 24px;
    color: #9ca3af;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.2s, color 0.2s;
}

.auth-gate-close:hover {
    background: #f3f4f6;
    color: #374151;
}

.auth-gate-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #7C3AED 0%, #6D28D9 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.auth-gate-title {
    font-size: 22px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 10px;
}

.auth-gate-text {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.6;
    margin: 0 0 28px;
}

.auth-gate-btn {
    display: block;
    width: 100%;
    padding: 13px 20px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s;
    box-sizing: border-box;
}

.auth-gate-btn:active {
    transform: scale(0.98);
}

.auth-gate-signin {
    background: linear-gradient(135deg, #7C3AED 0%, #6D28D9 100%);
    color: #fff;
    margin-bottom: 10px;
}

.auth-gate-signin:hover {
    background: linear-gradient(135deg, #6D28D9 0%, #5B21B6 100%);
    color: #fff;
}

.auth-gate-signup {
    background: #f5f3ff;
    color: #6D28D9;
    border: 1.5px solid #e0d5fc;
}

.auth-gate-signup:hover {
    background: #ede9fe;
    color: #5B21B6;
}


/* ==========================================
   CREDIT CONFIRMATION MODAL
   ========================================== */

#credit-confirm-modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
}

#credit-confirm-modal.active {
    opacity: 1;
}

.credit-modal-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
}

.credit-modal-card {
    position: relative;
    background: #fff;
    border-radius: 16px;
    padding: 40px 36px 32px;
    max-width: 420px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 1;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

#credit-confirm-modal.active .credit-modal-card {
    transform: translateY(0);
}

.credit-modal-close {
    position: absolute;
    top: 14px; right: 14px;
    width: 32px; height: 32px;
    background: none;
    border: none;
    font-size: 22px;
    color: #9ca3af;
    cursor: pointer;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
}

.credit-modal-close:hover {
    background: #f3f4f6;
    color: #374151;
}

.credit-modal-icon {
    width: 64px; height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #7C3AED 0%, #8b5cf6 100%);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: #fff;
}

.credit-modal-icon-warning {
    background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
}

.credit-modal-title {
    font-size: 22px;
    font-weight: 700;
    color: #111827;
    margin: 0 0 8px;
}

.credit-modal-text {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.6;
    margin: 0 0 24px;
}

.credit-modal-text strong {
    color: #374151;
}

.credit-modal-details {
    background: #f9fafb;
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 24px;
    text-align: left;
}

.credit-modal-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    font-size: 14px;
    color: #374151;
}

.credit-modal-cost {
    font-weight: 700;
    color: #7C3AED;
}

.credit-modal-balance {
    font-weight: 600;
    color: #111827;
}

.credit-modal-remaining {
    font-weight: 700;
    color: #10B981;
}

.credit-modal-divider {
    height: 1px;
    background: #e5e7eb;
    margin: 4px 0;
}

.credit-modal-btn {
    display: block;
    width: 100%;
    padding: 13px 20px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    box-sizing: border-box;
}

.credit-modal-confirm {
    background: linear-gradient(135deg, #7C3AED 0%, #6D28D9 100%);
    color: #fff;
    margin-bottom: 10px;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

.credit-modal-confirm:hover {
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    transform: translateY(-1px);
}

.credit-modal-confirm:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.credit-modal-purchase {
    background: linear-gradient(135deg, #7C3AED 0%, #6D28D9 100%);
    color: #fff;
    margin-bottom: 10px;
}

.credit-modal-cancel {
    background: #f5f3ff;
    color: #6D28D9;
    border: 1.5px solid #e0d5fc;
}

.credit-modal-cancel:hover {
    background: #ede9fe;
}

/* ==========================================
   RESPONSIVE
   ========================================== */

@media (max-width: 1200px) {
    .labs-grid-3col {
        grid-template-columns: repeat(2, 1fr);
    }

    .lab-overview-layout {
        grid-template-columns: 1fr 300px;
        gap: 32px;
    }
}

@media (max-width: 1024px) {
    .labs-main {
        grid-template-columns: 240px 1fr;
        gap: 24px;
    }

    .labs-grid-3col {
        grid-template-columns: repeat(2, 1fr);
    }

    .labs-grid-list .lab-card-thumbnail {
        width: 200px;
        min-width: 200px;
    }

    .lab-overview-layout {
        grid-template-columns: 1fr;
    }

    .lab-overview-sidebar {
        position: static;
    }

    #related-labs {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .labs-hero-title {
        font-size: 28px;
    }

    .labs-main {
        grid-template-columns: 1fr;
    }

    .filter-sidebar {
        position: static;
    }

    .labs-grid-3col {
        grid-template-columns: 1fr;
    }

    .labs-grid-list .lab-card {
        flex-direction: column;
    }

    .labs-grid-list .lab-card-thumbnail {
        width: 100%;
        min-width: unset;
        height: 180px;
    }

    .labs-grid-list .lab-card-footer {
        border-left: none;
        border-top: 1px solid var(--border-color);
        flex-direction: row;
    }

    .labs-controls {
        flex-wrap: wrap;
        gap: 12px;
    }

    .lab-hero-title {
        font-size: 22px;
    }

    .lab-hero-meta {
        gap: 8px;
    }

    #lab-content {
        padding: 24px;
    }

    .lab-stats-row {
        grid-template-columns: 1fr;
    }

    .lab-section {
        padding: 20px;
    }

    #related-labs {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   LAB COMPLETION BADGES
   ========================================== */

/* Badge on lab cards (labs listing page) */
.lab-completed-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: #10B981;
    color: #fff;
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
    z-index: 2;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

/* Badge on lab details hero */
.lab-hero-completed {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #10B981;
    color: #fff;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

/* Completed message in sidebar */
.lab-sidebar-completed {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: rgba(16, 185, 129, 0.1);
    color: #10B981;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    border: 1px solid rgba(16, 185, 129, 0.2);
}