/* 
 * Course Details Premium Stylesheet
 * Rich aesthetics, smooth transitions, sticky floating checkout, and high-end animations
 */

:root {
    --cd-dark-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --cd-primary: #4f46e5;
    --cd-primary-hover: #4338ca;
    --cd-accent: #f59e0b;
    --cd-text-light: #f8fafc;
    --cd-text-muted: #94a3b8;
    --cd-text-dark: #1e293b;
    --cd-card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --cd-sticky-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    --cd-border-radius: 1.25rem;
    --cd-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Hero Section --- */
.course-hero {
    background: var(--cd-dark-bg);
    color: var(--cd-text-light);
    padding: 5rem 0 7rem;
    position: relative;
    overflow: hidden;
}

.course-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    pointer-events: none;
}

.course-hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    border-radius: 50%;
    pointer-events: none;
}

.course-hero .breadcrumb {
    background: rgba(255, 255, 255, 0.07) !important;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.6rem 1.2rem !important;
    border-radius: 50px;
    display: inline-flex;
}

.course-hero .breadcrumb-item a {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
    transition: var(--cd-transition);
}

.course-hero .breadcrumb-item a:hover {
    color: var(--cd-accent) !important;
    text-decoration: none;
}

.course-hero .breadcrumb-item.active {
    color: var(--cd-text-light) !important;
    opacity: 0.9;
}

.course-hero .badge {
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.course-hero .badge.bg-light {
    background-color: rgba(255, 255, 255, 0.15) !important;
    color: var(--cd-text-light) !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.course-hero .badge.bg-warning {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%) !important;
    color: #1e293b !important;
    box-shadow: 0 4px 10px rgba(245, 158, 11, 0.3);
}

.course-title {
    font-size: 2.8rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--cd-text-light);
    margin-top: 1rem;
    margin-bottom: 1.2rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.course-hero p.lead {
    font-size: 1.15rem;
    color: rgba(248, 250, 252, 0.85);
    line-height: 1.6;
    margin-bottom: 2rem;
    max-width: 680px;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
}

.course-meta .meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    color: rgba(248, 250, 252, 0.9);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--cd-transition);
}

.course-meta .meta-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.course-meta .meta-item i {
    font-size: 1rem;
    color: var(--cd-accent);
}

/* --- Layout and Sidebar Structure --- */
.content-section {
    padding: 0 0 5rem;
    margin-top: -4rem; /* Overlap content section into the dark hero */
    position: relative;
    z-index: 10;
}

/* Sticky Sidebar Wrapper */
.sticky-sidebar {
    position: -webkit-sticky;
    position: sticky;
    top: 90px;
    z-index: 100;
    transition: var(--cd-transition);
}

/* Price Section / Enrollment Card */
.price-section {
    background: #ffffff;
    border-radius: var(--cd-border-radius);
    box-shadow: var(--cd-sticky-shadow);
    border: 1px solid rgba(226, 232, 240, 0.8);
    overflow: hidden;
    transition: var(--cd-transition);
}

.price-section:hover {
    box-shadow: 0 30px 60px -15px rgba(15, 23, 42, 0.2);
}

/* Course Sidebar Image */
.sidebar-media {
    position: relative;
    overflow: hidden;
    border-radius: var(--cd-border-radius) var(--cd-border-radius) 0 0;
    aspect-ratio: 16/10;
    background: #f1f5f9;
}

.sidebar-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--cd-transition);
}

.price-section:hover .sidebar-media img {
    transform: scale(1.05);
}

.sidebar-media .play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.9;
    transition: var(--cd-transition);
}

.sidebar-media .play-overlay i {
    font-size: 3.5rem;
    color: #ffffff;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: var(--cd-transition);
}

.sidebar-media:hover .play-overlay {
    background: rgba(15, 23, 42, 0.55);
}

.sidebar-media:hover .play-overlay i {
    transform: scale(1.15);
    color: #fbbf24;
}

/* Card Content details */
.card-content-body {
    padding: 2rem;
}

/* Price Details */
.price-display-wrapper {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.price-amount {
    font-size: 2.25rem;
    font-weight: 800;
    color: #0f172a;
    line-height: 1;
}

.original-price-del {
    font-size: 1.2rem;
    color: var(--cd-text-muted);
    text-decoration: line-through;
}

.discount-badge {
    background: #ecfdf5;
    color: #059669;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    border: 1px solid #d1fae5;
}

/* Enrolled Badge */
.enrolled-badge {
    background: #ecfdf5;
    color: #059669;
    padding: 1rem;
    border-radius: 12px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1.25rem;
    border: 1px solid #a7f3d0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
}

/* Delivery Mode Cards */
.mode-selector-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--cd-text-dark);
    margin-bottom: 0.75rem;
}

.mode-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.mode-card {
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 0.85rem;
    cursor: pointer;
    text-align: center;
    transition: var(--cd-transition);
    position: relative;
    user-select: none;
}

.mode-card:hover {
    border-color: #cbd5e1;
    transform: translateY(-2px);
}

.mode-card.selected {
    border-color: var(--cd-primary);
    background: #f5f3ff;
}

.mode-card.selected::after {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 5px;
    right: 5px;
    color: var(--cd-primary);
    font-size: 0.85rem;
}

.mode-icon {
    font-size: 1.25rem;
    color: var(--cd-text-muted);
    margin-bottom: 0.4rem;
    transition: var(--cd-transition);
}

.mode-card.selected .mode-icon {
    color: var(--cd-primary);
}

.mode-title {
    font-weight: 700;
    font-size: 0.85rem;
    color: #475569;
    margin-bottom: 0.25rem;
}

.mode-card.selected .mode-title {
    color: var(--cd-primary);
}

.mode-price {
    font-size: 0.95rem;
    font-weight: 800;
    color: #0f172a;
}

.mode-features {
    display: none; /* Hide features inside mode cards to keep clean */
}

/* Premium Buttons Styling */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-enroll {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%) !important;
    color: white !important;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.2px;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
    border: none !important;
    transition: var(--cd-transition) !important;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn-enroll:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.45);
    color: white !important;
}

.btn-enroll:active {
    transform: translateY(-1px);
}

/* Booking & Support CTAs */
.btn-test, .btn-mentor {
    padding: 0.85rem 1.25rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    transition: var(--cd-transition);
    border: 1px solid #e2e8f0;
    width: 100%;
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-test {
    background: #f8fafc;
    color: #1e293b;
}

.btn-test:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
    transform: translateY(-2px);
    color: #1e293b;
}

.btn-mentor {
    background: #ffffff;
    color: #0d9488;
    border-color: #ccfbf1;
}

.btn-mentor:hover {
    background: #f0fdfa;
    border-color: #99f6e4;
    transform: translateY(-2px);
    color: #0d9488;
}

/* Wishlist Button */
.wishlist-btn-wrapper {
    margin-top: 1rem;
}

.btn-wishlist {
    background: transparent;
    border: 1px solid #e2e8f0;
    color: #475569;
    width: 100%;
    padding: 0.75rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--cd-transition);
}

.btn-wishlist:hover {
    background: #fff1f2;
    border-color: #fecdd3;
    color: #e11d48;
}

.btn-wishlist i {
    transition: var(--cd-transition);
}

.btn-wishlist:hover i {
    transform: scale(1.2);
}

/* What's Included Feature List */
.sidebar-features-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--cd-text-dark);
    margin-top: 2rem;
    margin-bottom: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e2e8f0;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.feature-list li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.feature-icon {
    width: 28px !important;
    height: 28px !important;
    min-width: 28px;
    background: #e0e7ff;
    color: var(--cd-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    margin: 0 !important;
    transition: var(--cd-transition);
}

.feature-list li:hover .feature-icon {
    background: var(--cd-primary);
    color: white;
    transform: scale(1.1);
}

.feature-list li strong {
    font-size: 0.9rem;
    color: #334155;
    display: inline-block;
}

.feature-list li small {
    font-size: 0.8rem;
    color: #64748b;
}

/* --- Left Column Info Cards --- */
.info-card {
    background: #ffffff;
    border-radius: var(--cd-border-radius);
    padding: 2.25rem;
    box-shadow: var(--cd-card-shadow);
    border: 1px solid rgba(226, 232, 240, 0.5);
    margin-bottom: 2rem;
    transition: var(--cd-transition);
}

.info-card:hover {
    box-shadow: 0 25px 35px -10px rgba(0, 0, 0, 0.05);
}

.info-card h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.info-card h3 i {
    color: var(--cd-primary);
}

/* Course Description Text */
.info-card div {
    font-size: 1rem;
    line-height: 1.7;
    color: #475569;
}

.info-card ul {
    padding-left: 1.25rem;
    margin-bottom: 1.5rem;
}

.info-card li {
    margin-bottom: 0.5rem;
}

/* --- Custom Styled Sections (includes/course-detail-sections.php) --- */
.detail-section {
    background: #ffffff;
    border-radius: var(--cd-border-radius);
    padding: 2.25rem;
    box-shadow: var(--cd-card-shadow);
    border: 1px solid rgba(226, 232, 240, 0.5);
    margin-bottom: 2rem;
}

.detail-section h3 {
    font-size: 1.4rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.detail-section h3 i {
    color: var(--cd-primary);
}

/* Requirements & What You'll Learn Lists */
.detail-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .learning-outcomes {
        grid-template-columns: 1fr 1fr !important;
        gap: 1rem !important;
    }
}

.detail-section ul li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.95rem;
    color: #475569;
    line-height: 1.5;
}

.detail-section ul li i {
    margin-top: 3px;
    font-size: 1.05rem;
}

.detail-section ul li i.fa-check {
    color: var(--cd-primary);
}

.detail-section ul li i.fa-check-circle {
    color: #10b981;
}

/* Syllabus Section */
.syllabus-item {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--cd-transition);
}

.syllabus-item:hover {
    border-color: #cbd5e1;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.syllabus-item h5 {
    background: #f8fafc;
    margin: 0;
    padding: 1.15rem 1.5rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: #1e293b;
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    transition: var(--cd-transition);
}

.syllabus-item h5:hover {
    background: #f1f5f9;
}

.syllabus-topics {
    padding: 1.25rem 1.5rem;
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.syllabus-topic {
    font-size: 0.95rem;
    color: #475569;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px dashed #f1f5f9;
}

.syllabus-topic:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.syllabus-topic i {
    font-size: 0.75rem;
    color: var(--cd-primary);
    opacity: 0.7;
}

/* Target Audience Badges */
.audience-badge {
    display: inline-flex;
    align-items: center;
    background: #f5f3ff;
    color: var(--cd-primary);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-right: 0.75rem;
    margin-bottom: 0.75rem;
    border: 1px solid #ddd6fe;
    transition: var(--cd-transition);
}

.audience-badge:hover {
    transform: scale(1.05);
    background: var(--cd-primary);
    color: white;
}

/* Career Outcomes Card styling */
.career-outcome {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    background: #f8fafc;
    padding: 1.25rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    border: 1px solid #e2e8f0;
    transition: var(--cd-transition);
}

.career-outcome:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
    transform: translateX(5px);
}

.outcome-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    border-radius: 10px;
    background: #f5f3ff;
    color: var(--cd-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.career-outcome h6 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.25rem;
}

.career-outcome p {
    font-size: 0.9rem;
    color: #64748b;
    margin: 0;
}

/* Duration Mode Card styling */
.duration-mode-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    height: 100%;
    transition: var(--cd-transition);
}

.duration-mode-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.03);
    border-color: var(--cd-primary);
}

.duration-mode-card i {
    font-size: 2rem;
    color: var(--cd-primary);
    margin-bottom: 0.75rem;
}

.duration-mode-card h5 {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    color: #64748b;
    margin-bottom: 0.5rem;
}

.duration-mode-card p {
    font-size: 1.15rem;
    font-weight: 800;
    color: #1e293b;
    margin: 0;
}

/* --- Reviews Layout Redesign --- */
.rating-summary-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: center;
    margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
    .rating-summary-grid {
        grid-template-columns: 1fr 2fr;
    }
}

.rating-summary-score {
    text-align: center;
    background: #fafafa;
    padding: 2rem;
    border-radius: var(--cd-border-radius);
    border: 1px solid #f1f5f9;
}

.big-rating-number {
    font-size: 4rem;
    font-weight: 800;
    color: #0f172a;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.score-stars {
    color: var(--cd-accent);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.score-sub {
    font-weight: 700;
    font-size: 0.95rem;
    color: #475569;
}

/* Rating progress bars */
.rating-bars-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.rating-bar-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.rating-bar-label {
    width: 60px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #475569;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
}

.rating-bar-progress-wrapper {
    flex-grow: 1;
    height: 10px;
    background: #f1f5f9;
    border-radius: 10px;
    overflow: hidden;
}

.rating-bar-fill {
    height: 100%;
    background: var(--cd-accent);
    border-radius: 10px;
}

.rating-bar-percentage {
    width: 40px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #64748b;
}

/* Reviews List */
.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.review-item {
    border-bottom: 1px solid #f1f5f9;
    padding-bottom: 1.5rem !important;
}

.review-item:last-child {
    border-bottom: none;
    padding-bottom: 0 !important;
}

.review-avatar-text {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    color: white;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
}

.review-content h6 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #1e293b;
}

.rating-stars-active {
    color: var(--cd-accent);
}

.rating-stars-inactive {
    color: #cbd5e1;
}

/* Writing review rating check options */
.rating-input {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.rating-input label {
    border-radius: 8px !important;
    padding: 0.4rem 0.8rem;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--cd-transition);
}

/* --- Related Courses Interested Section --- */
.interested-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid #e2e8f0;
}

.interested-section h3 {
    font-size: 1.75rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
}

.interested-card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--cd-card-shadow);
    transition: var(--cd-transition);
}

.interested-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 30px rgba(15, 23, 42, 0.08);
    border-color: #cbd5e1;
}

.interested-card img {
    height: 160px;
    object-fit: cover;
    width: 100%;
    transition: var(--cd-transition);
}

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

.interested-card-body {
    padding: 1.25rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.interested-card-body h5 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 0.5rem;
    line-height: 1.4;
    transition: var(--cd-transition);
}

.interested-card:hover .interested-card-body h5 {
    color: var(--cd-primary);
}

.interested-card-body .price {
    font-size: 1.25rem;
    font-weight: 800;
    color: #0f172a;
}

.interested-card-body .original-price {
    font-size: 0.9rem;
    color: var(--cd-text-muted);
    text-decoration: line-through;
    margin-left: 0.5rem;
}

.view-all-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    color: #475569;
    padding: 0.85rem 1.75rem;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    margin-top: 2rem;
    border: 1px solid #e2e8f0;
    transition: var(--cd-transition);
    text-decoration: none !important;
}

.view-all-btn:hover {
    background: #e2e8f0;
    color: #1e293b;
    transform: translateY(-2px);
}

/* Stat badges under what's included */
.stat-badge {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 1rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 0.95rem;
    color: #334155;
    margin-bottom: 0.75rem;
    transition: var(--cd-transition);
}

.stat-badge:hover {
    background: #f5f3ff;
    border-color: #ddd6fe;
    color: var(--cd-primary);
    transform: translateX(4px);
}

.stat-badge i {
    color: var(--cd-primary);
    font-size: 1.15rem;
}

/* Quick enquiry toggle updates */
.quick-enquiry-form {
    z-index: 10000 !important;
}

/* Animations */
@keyframes pulseGlow {
    0% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(79, 70, 229, 0); }
    100% { box-shadow: 0 0 0 0 rgba(79, 70, 229, 0); }
}

.btn-enroll-pulse {
    animation: pulseGlow 2s infinite;
}

/* Responsive adjustments */
@media (max-width: 991.98px) {
    .content-section {
        margin-top: 2rem;
        padding-bottom: 3rem;
    }
    
    .sticky-sidebar {
        margin-top: 2rem;
    }
    
    .price-section {
        box-shadow: var(--cd-card-shadow);
    }
    
    .course-title {
        font-size: 2.2rem;
    }
}