/* ========================================
   DARK STREAMING PLATFORM - COURSE PREVIEW
   ======================================== */

/* Root Variables */
:root {
    --cp-bg-page: #0f0f23;
    --cp-bg-card: #1a1a2e;
    --cp-bg-elevated: #252540;
    --cp-bg-hover: #2a2a4a;
    --cp-text-primary: #ffffff;
    --cp-text-secondary: #a0a0b8;
    --cp-text-muted: #6b6b80;
    --cp-accent: #3b82f6;
    --cp-accent-hover: #2563eb;
    --cp-border: #2a2a45;
    --cp-surface: #1a1a2e;
    --cp-radius: 16px;
    --cp-radius-sm: 10px;
    --cp-radius-xs: 8px;
}

/* Page Wrapper */
.cp-page-wrapper {
    min-height: 100vh;
    background: #1d1d1d;
    color: var(--cp-text-primary);
}

/* Main Content */
.cp-main {
    padding: 24px 0 60px;
}

.cp-container {
    margin: 0 auto;
    padding: 0px 60px 0 24px;
}

/* Two-Column Grid */
.cp-grid {
    display: grid;
    grid-template-columns: 1fr 490px;
    gap: 32px;
    align-items: start;
}

/* ========================================
   LEFT COLUMN
   ======================================== */
.cp-left {
    min-width: 0;
}

/* Video Player */
.cp-video-player {
    position: relative;
    border-radius: var(--cp-radius);
    overflow: hidden;
    background: #000;
    aspect-ratio: 16 / 9;
    margin-bottom: 20px;
}

.cp-video-player iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Video Placeholder */
.cp-video-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1d1d1d 0%, #060708 100%);
    text-align: center;
    padding: 2rem;
}

.cp-video-placeholder-icon {
    font-size: 4rem;
    color: var(--cp-accent);
    margin-bottom: 1rem;
    opacity: 0.8;
    animation: cp-pulse 2s ease-in-out infinite;
}

@keyframes cp-pulse {
    0%, 100% { opacity: 0.8; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.cp-video-placeholder-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    margin-bottom: 0.5rem;
}

.cp-video-placeholder-desc {
    font-size: 0.9375rem;
    color: var(--cp-text-secondary);
}

/* Teacher Bar */
.cp-teacher-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.cp-teacher-info {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}

a.cp-teacher-info:hover {
    opacity: 0.85;
}

.cp-teacher-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--cp-border);
    flex-shrink: 0;
}

.cp-teacher-avatar-placeholder {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--cp-accent) 0%, #6366f1 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.8125rem;
    flex-shrink: 0;
}

.cp-teacher-details {
    display: flex;
    flex-direction: column;
}

.cp-teacher-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    line-height: 1.3;
}

.cp-teacher-subs {
    font-size: 0.8125rem;
    color: var(--cp-text-muted);
}

/* Actions */
.cp-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.cp-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--cp-radius-xs);
    border: 1px solid var(--cp-border);
    background: #1d1d1d;
    color: var(--cp-text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.cp-action-btn:hover {
    background: var(--cp-bg-elevated);
    border-color: var(--cp-text-muted);
}

.cp-action-btn i {
    font-size: 1.125rem;
}

.cp-action-btn.primary {
    background: var(--cp-accent);
    border-color: var(--cp-accent);
    color: white;
}

.cp-action-btn.primary:hover {
    background: var(--cp-accent-hover);
    border-color: var(--cp-accent-hover);
}

.cp-action-btn.primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Course Title */
.cp-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cp-text-primary);
    margin: 0 0 12px 0;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

/* Stats Row */
.cp-stats {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.cp-stat-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--cp-text-secondary);
    background: rgba(255, 255, 255, 0.06);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: background 0.2s, border-color 0.2s;
}

.cp-stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.1);
}

.cp-stat-item i {
    font-size: 0.9375rem;
    color: var(--cp-text-muted);
}

.cp-stat-item .cp-stat-highlight {
    color: #fbbf24;
}

/* Description */
.cp-description {
    margin-bottom: 24px;
    position: relative;
    background: #2a2a2a;
    border: 1px solid var(--cp-border);
    border-radius: var(--cp-radius);
    padding: 24px;
}

.cp-description-content {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--cp-text-secondary);
}

.cp-description-content h1,
.cp-description-content h2,
.cp-description-content h3,
.cp-description-content h4,
.cp-description-content h5,
.cp-description-content h6 {
    color: var(--cp-text-primary);
}

.cp-description-content p {
    margin-bottom: 0.75rem;
}

.cp-description-content p:last-child {
    margin-bottom: 0;
}

.cp-description-clamped {
    max-height: 260px;
    overflow: hidden;
    position: relative;
}

.cp-description-clamped::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50px;
}

.cp-expand-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0;
    margin-top: 8px;
    background: none;
    border: none;
    color: var(--cp-accent);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s;
}

.cp-expand-btn:hover {
    color: var(--cp-accent-hover);
}

/* What You'll Learn */
.cp-what-learn {
    background: #1d1d1d;
    border-radius: var(--cp-radius);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--cp-border);
}

.cp-what-learn-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.cp-what-learn-header i {
    font-size: 1.25rem;
    color: var(--cp-accent);
}

.cp-what-learn-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    margin: 0;
}

.cp-what-learn-content {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--cp-text-secondary);
}

.cp-what-learn-content .markdown-clamp {
    max-height: 150px;
    overflow: hidden;
    position: relative;
}

.cp-what-learn-content .markdown-clamp::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: linear-gradient(to bottom, transparent, #1d1d1d);
}

/* ========================================
   RIGHT COLUMN
   ======================================== */
.cp-right {
    position: sticky;
    top: 24px;
}

/* Course Content Panel */
.cp-content-panel {
    background: #2a2a2a;
    border-radius: var(--cp-radius);
    border: 1px solid var(--cp-border);
    overflow: hidden;
    margin-bottom: 24px;
}

.cp-content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--cp-border);
}

.cp-content-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    margin: 0;
}

.cp-content-header span {
    font-size: 0.8125rem;
    color: var(--cp-text-muted);
}

.cp-content-list {
    max-height: 500px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--cp-bg-elevated) transparent;
}

.cp-content-list::-webkit-scrollbar {
    width: 6px;
}

.cp-content-list::-webkit-scrollbar-track {
    background: transparent;
}

.cp-content-list::-webkit-scrollbar-thumb {
    background: var(--cp-bg-elevated);
    border-radius: 3px;
}

/* Section Toggle in Content Panel */
.cp-section-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--cp-border);
    cursor: pointer;
    transition: background 0.2s;
    text-align: left;
}

.cp-section-toggle:hover {
    background: rgba(255, 255, 255, 0.03);
}

.cp-section-toggle i {
    font-size: 0.875rem;
    color: var(--cp-text-muted);
    transition: transform 0.2s;
    flex-shrink: 0;
}

.cp-section-name {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cp-section-count {
    font-size: 0.75rem;
    color: var(--cp-text-muted);
    flex-shrink: 0;
}

/* Video Items in Content Panel */
.cp-video-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.cp-video-list.expanded {
    max-height: 2000px;
}

.cp-video-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px 10px 36px;
    cursor: pointer;
    transition: background 0.2s;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.cp-video-item:hover {
    background: rgba(255, 255, 255, 0.03);
}

.cp-video-item:last-child {
    border-bottom: none;
}

.cp-video-item.active {
    background: rgba(59, 130, 246, 0.1);
}

.cp-video-item.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.cp-video-item-thumb {
    width: 80px;
    min-width: 80px;
    height: 45px;
    border-radius: 6px;
    overflow: hidden;
    position: relative;
    background: var(--cp-bg-elevated);
    flex-shrink: 0;
}

.cp-video-item-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cp-video-item-thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cp-text-muted);
    font-size: 0.875rem;
}

.cp-video-item-lock-overlay,
.cp-video-item-playing-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.cp-video-item-lock-overlay {
    background: rgba(0, 0, 0, 0.6);
    color: var(--cp-text-muted);
}

.cp-video-item-playing-overlay {
    background: rgba(59, 130, 246, 0.3);
    color: white;
}

.cp-video-item-info {
    flex: 1;
    min-width: 0;
}

.cp-video-item-title {
    font-size: 0.8125rem;
    color: var(--cp-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

.cp-video-item-meta {
    font-size: 0.6875rem;
    color: var(--cp-text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 2px;
}

.cp-video-item-badge {
    font-size: 0.625rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    flex-shrink: 0;
}

.cp-video-item-badge.free {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
}

.cp-video-item-badge.premium {
    background: rgba(255, 255, 255, 0.05);
    color: var(--cp-text-muted);
}

/* ========================================
   RELATED COURSES
   ======================================== */
.cp-related {
    padding: 20px;
}

.cp-related-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.cp-related-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    margin: 0;
}

.cp-related-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cp-related-card {
    display: flex;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    padding: 8px;
    border-radius: var(--cp-radius-sm);
    transition: background 0.2s;
}

.cp-related-card:hover {
    background: var(--cp-bg-elevated);
}

.cp-related-thumb {
    width: 120px;
    min-width: 120px;
    height: 68px;
    border-radius: var(--cp-radius-xs);
    overflow: hidden;
    background: var(--cp-bg-elevated);
    flex-shrink: 0;
}

.cp-related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cp-related-thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cp-text-muted);
    font-size: 1.5rem;
}

.cp-related-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.cp-related-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    margin: 0 0 4px 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.3;
}

.cp-related-teacher {
    font-size: 0.75rem;
    color: var(--cp-text-muted);
    margin-bottom: 4px;
}

.cp-related-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
}

.cp-related-level {
    color: var(--cp-text-muted);
}

.cp-related-price {
    color: var(--cp-accent);
    font-weight: 600;
}

.cp-see-all-btn {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 16px;
    background: transparent;
    border: 1px solid var(--cp-border);
    border-radius: var(--cp-radius-xs);
    color: var(--cp-accent);
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
}

.cp-see-all-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--cp-accent);
}

/* ========================================
   PAYMENT STATUS BANNER
   ======================================== */
.cp-payment-banner {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-radius: var(--cp-radius-sm);
    margin-bottom: 20px;
    font-size: 0.875rem;
}

.cp-payment-banner.error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.cp-payment-banner.warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fcd34d;
}

.cp-payment-banner.info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

.cp-payment-banner i {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.cp-payment-banner-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    opacity: 0.6;
    cursor: pointer;
    font-size: 1.125rem;
    padding: 4px;
}

.cp-payment-banner-close:hover {
    opacity: 1;
}

/* ========================================
   ENROLLMENT ERROR
   ======================================== */
.cp-enrollment-error {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--cp-radius-xs);
    color: #fca5a5;
    font-size: 0.875rem;
    margin-top: 12px;
}

/* ========================================
   SHARE MODAL / INLINE
   ======================================== */
.cp-share-row {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.cp-share-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--cp-radius-xs);
    border: 1px solid var(--cp-border);
    background: #1d1d1d;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1.125rem;
}

.cp-share-btn:hover {
    transform: translateY(-2px);
    border-color: currentColor;
}

.cp-share-btn.facebook { color: #1877f2; }
.cp-share-btn.twitter { color: #ffffff; }
.cp-share-btn.linkedin { color: #0a66c2; }
.cp-share-btn.whatsapp { color: #25d366; }
.cp-share-btn.copy { color: #6366f1; }

/* ========================================
   QUIZ SECTION (preserved)
   ======================================== */
.cp-quiz-section {
    background: #1d1d1d;
    border-radius: var(--cp-radius);
    border: 1px solid var(--cp-border);
    padding: 24px;
    margin-bottom: 24px;
}

.cp-quiz-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--cp-text-primary);
    margin: 0 0 8px 0;
}

.cp-quiz-section p {
    font-size: 0.875rem;
    color: var(--cp-text-secondary);
    margin: 0 0 16px 0;
}

.cp-quiz-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--cp-accent);
    color: white;
    border: none;
    border-radius: var(--cp-radius-xs);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.cp-quiz-btn:hover {
    background: var(--cp-accent-hover);
}

/* ========================================
   ENROLLMENT CTA SECTION
   ======================================== */
.cp-cta {
    margin-top: 32px;
    margin-bottom: 8px;
}

.cp-cta-inner {
    position: relative;
    background: linear-gradient(135deg, #1d1d1d, #14141a);
    border-radius: var(--cp-radius);
    overflow: hidden;
}

.cp-cta-bg {
    position: absolute;
    inset: 0;
    opacity: 0.12;
    pointer-events: none;
}

.cp-cta-circle {
    position: absolute;
    border-radius: 50%;
    background: white;
}

.cp-cta-circle-1 {
    width: 120px;
    height: 120px;
    top: -50px;
    right: -40px;
    animation: cp-cta-float 6s ease-in-out infinite;
}

.cp-cta-circle-2 {
    width: 70px;
    height: 70px;
    bottom: -30px;
    left: -20px;
    animation: cp-cta-float 8s ease-in-out infinite 1s;
}

.cp-cta-circle-3 {
    width: 40px;
    height: 40px;
    top: 50%;
    right: 22%;
    animation: cp-cta-pulse 4s ease-in-out infinite 0.5s;
}

@keyframes cp-cta-float {
    0%, 100% { transform: translateY(0) translateX(0); }
    33% { transform: translateY(-12px) translateX(4px); }
    66% { transform: translateY(-20px) translateX(-4px); }
}

@keyframes cp-cta-pulse {
    0%, 100% { transform: scale(1); opacity: 0.12; }
    50% { transform: scale(1.2); opacity: 0.2; }
}

.cp-cta-body {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 36px 40px;
}

.cp-cta-text {
    flex: 1;
    min-width: 0;
}

.cp-cta-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.2);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: white;
    margin-bottom: 14px;
    backdrop-filter: blur(8px);
}

.cp-cta-title {
    font-size: 1.625rem;
    font-weight: 700;
    color: white;
    margin: 0 0 8px 0;
    line-height: 1.2;
}

.cp-cta-desc {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.85);
    margin: 0 0 20px 0;
    line-height: 1.5;
}

.cp-cta-benefits {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.cp-cta-benefit {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.9);
}

.cp-cta-benefit strong {
    font-weight: 600;
}

.cp-cta-benefit-icon {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9375rem;
    flex-shrink: 0;
}

.cp-cta-action {
    flex-shrink: 0;
    width: 260px;
    text-align: center;
}

.cp-cta-price {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 14px;
    backdrop-filter: blur(8px);
}

.cp-cta-price-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 6px;
    margin-bottom: 4px;
}

.cp-cta-price-amount.free {
    justify-content: center;
}

.cp-cta-amount {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    line-height: 1;
}

.cp-cta-currency {
    font-size: 1rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
}

.cp-cta-price-label {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.7);
}

.cp-cta-enroll-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    background: white;
    color: var(--cp-accent);
    border: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.cp-cta-enroll-btn:hover {
    background: #f0f4ff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.cp-cta-guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 12px;
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.7);
}

/* CTA Responsive */
@media (max-width: 768px) {
    .cp-cta-body {
        flex-direction: column;
        padding: 28px 24px;
        gap: 24px;
    }

    .cp-cta-action {
        width: 100%;
    }

    .cp-cta-benefits {
        grid-template-columns: 1fr;
    }

    .cp-cta-title {
        font-size: 1.375rem;
    }
}

/* ========================================
   LOADING SKELETON (dark theme)
   ======================================== */
.cp-skeleton-video {
    aspect-ratio: 16 / 9;
    border-radius: var(--cp-radius);
    background: linear-gradient(135deg, #1d1d1d 0%, #060708 100%);
    margin-bottom: 20px;
    animation: cp-shimmer 1.5s infinite;
}

.cp-skeleton-bar {
    height: 16px;
    border-radius: 8px;
    background: #1d1d1d;
    margin-bottom: 12px;
    animation: cp-shimmer 1.5s infinite;
}

.cp-skeleton-bar.short { width: 60%; }
.cp-skeleton-bar.shorter { width: 40%; }
.cp-skeleton-bar.title { height: 24px; }

/* Teacher Bar Skeleton */
.cp-skeleton-teacher-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 20px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.cp-skeleton-teacher-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.cp-skeleton-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #1d1d1d;
    animation: cp-shimmer 1.5s infinite;
    flex-shrink: 0;
}

.cp-skeleton-teacher-text {
    display: flex;
    flex-direction: column;
}

.cp-skeleton-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cp-skeleton-share-btns {
    display: flex;
    gap: 8px;
}

.cp-skeleton-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #1d1d1d;
    animation: cp-shimmer 1.5s infinite;
}

.cp-skeleton-enroll-btn {
    width: 180px;
    height: 42px;
    border-radius: 12px;
    background: #1d1d1d;
    animation: cp-shimmer 1.5s infinite;
}

/* Stats Row Skeleton */
.cp-skeleton-stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin: 16px 0 24px;
}

.cp-skeleton-stat {
    width: 90px;
    height: 16px;
    border-radius: 8px;
    background: #1d1d1d;
    animation: cp-shimmer 1.5s infinite;
}

/* Description Skeleton */
.cp-skeleton-description {
    margin-bottom: 24px;
    padding-top: 8px;
}

/* What You'll Learn Skeleton */
.cp-skeleton-learn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--cp-radius);
    padding: 24px;
    margin-top: 8px;
}

/* Course Content Panel Skeleton */
.cp-skeleton-content-panel {
    background: var(--cp-surface);
    border: 1px solid var(--cp-border);
    border-radius: var(--cp-radius);
    overflow: hidden;
    margin-bottom: 24px;
}

.cp-skeleton-content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--cp-border);
}

.cp-skeleton-video-list {
    padding: 8px 0;
}

.cp-skeleton-video-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
}

.cp-skeleton-thumb {
    width: 64px;
    height: 40px;
    border-radius: 6px;
    background: #1d1d1d;
    animation: cp-shimmer 1.5s infinite;
    flex-shrink: 0;
}

.cp-skeleton-video-info {
    flex: 1;
    min-width: 0;
}

/* Related Courses Skeleton */
.cp-skeleton-related {
    background: var(--cp-surface);
    border: 1px solid var(--cp-border);
    border-radius: var(--cp-radius);
    padding: 20px;
}

.cp-skeleton-related-card {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.cp-skeleton-related-card:last-child {
    border-bottom: none;
}

.cp-skeleton-related-thumb {
    width: 80px;
    height: 52px;
    border-radius: 8px;
    background: #1d1d1d;
    animation: cp-shimmer 1.5s infinite;
    flex-shrink: 0;
}

.cp-skeleton-related-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

@keyframes cp-shimmer {
    0% { opacity: 0.5; }
    50% { opacity: 0.8; }
    100% { opacity: 0.5; }
}

/* Skeleton responsive */
@media (max-width: 768px) {
    .cp-skeleton-teacher-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .cp-skeleton-actions {
        width: 100%;
        justify-content: space-between;
    }

    .cp-skeleton-enroll-btn {
        flex: 1;
    }

    .cp-skeleton-stats {
        gap: 10px;
    }

    .cp-skeleton-stat {
        width: 75px;
    }

    .cp-skeleton-share-btns {
        display: none;
    }
}

/* ========================================
   404 / ERROR STATE
   ======================================== */
.cp-error-section {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
}

.cp-error-card {
    background: #1d1d1d;
    border-radius: 24px;
    padding: 60px 40px;
    max-width: 600px;
    width: 100%;
    text-align: center;
    border: 1px solid var(--cp-border);
}

.cp-error-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: cp-pulse-icon 2s ease-in-out infinite;
}

@keyframes cp-pulse-icon {
    0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4); }
    50% { transform: scale(1.05); box-shadow: 0 0 0 20px rgba(245, 158, 11, 0); }
}

.cp-error-icon i {
    font-size: 48px;
    color: white;
}

.cp-error-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--cp-text-primary);
    margin-bottom: 12px;
}

.cp-error-desc {
    font-size: 1rem;
    color: var(--cp-text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
}

.cp-error-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cp-error-btn {
    padding: 12px 28px;
    border-radius: var(--cp-radius-sm);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.cp-error-btn.primary {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.cp-error-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
    color: white;
}

.cp-error-btn.secondary {
    background: var(--cp-bg-elevated);
    color: var(--cp-text-secondary);
}

.cp-error-btn.secondary:hover {
    background: var(--cp-bg-hover);
    transform: translateY(-2px);
    color: var(--cp-text-primary);
}

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

/* Large Tablet / Small Desktop */
@media (max-width: 1100px) {
    .cp-grid {
        grid-template-columns: 1fr 360px;
        gap: 24px;
    }

    .cp-container {
        padding: 0px 32px 0 24px;
    }

    .cp-related-thumb {
        width: 100px;
        min-width: 100px;
        height: 56px;
    }
}

/* Tablet - Single Column */
@media (max-width: 992px) {
    .cp-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .cp-container {
        padding: 0 20px;
    }

    .cp-right {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .cp-content-panel {
        margin-bottom: 0;
    }

    .cp-content-list {
        max-height: 400px;
    }

    .cp-main {
        padding: 16px 0 40px;
    }

    .cp-video-player {
        border-radius: 12px;
    }

    .cp-what-learn {
        padding: 20px;
    }

    .cp-cta-body {
        padding: 28px 32px;
        gap: 32px;
    }

    .cp-cta-action {
        width: 240px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .cp-container {
        padding: 0 16px;
    }

    .cp-main {
        padding: 12px 0 32px;
    }

    .cp-grid {
        gap: 20px;
    }

    .cp-right {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .cp-video-player {
        border-radius: 10px;
        margin-bottom: 14px;
    }

    .cp-title {
        font-size: 1.25rem;
        margin-bottom: 10px;
    }

    .cp-stats {
        gap: 6px;
        margin-bottom: 16px;
    }

    .cp-stat-item {
        font-size: 0.75rem;
        padding: 4px 10px;
    }

    .cp-teacher-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 14px;
    }

    .cp-actions {
        width: 100%;
        flex-wrap: wrap;
    }

    .cp-share-row {
        flex: 1;
    }

    .cp-action-btn {
        flex: 1;
        justify-content: center;
        min-width: 0;
        font-size: 0.8125rem;
        padding: 8px 12px;
    }

    .cp-action-btn.primary {
        width: 100%;
        order: -1;
    }

    .cp-teacher-avatar,
    .cp-teacher-avatar-placeholder {
        width: 38px;
        height: 38px;
    }

    .cp-teacher-name {
        font-size: 0.875rem;
    }

    .cp-teacher-subs {
        font-size: 0.75rem;
    }

    .cp-description-content {
        font-size: 0.875rem;
        line-height: 1.65;
    }

    .cp-what-learn {
        padding: 16px;
        margin-bottom: 16px;
    }

    .cp-what-learn-header h3 {
        font-size: 1rem;
    }

    .cp-what-learn-content {
        font-size: 0.875rem;
    }

    .cp-content-panel {
        border-radius: 12px;
    }

    .cp-content-header {
        padding: 14px 16px;
    }

    .cp-section-toggle {
        padding: 10px 16px;
    }

    .cp-video-item {
        padding: 8px 16px 8px 28px;
    }

    .cp-related-card {
        padding: 6px;
    }

    .cp-related-thumb {
        width: 90px;
        min-width: 90px;
        height: 52px;
    }

    .cp-related-title {
        font-size: 0.8125rem;
    }

    .cp-cta {
        margin-top: 20px;
    }

    .cp-cta-body {
        flex-direction: column;
        padding: 24px 20px;
        gap: 20px;
    }

    .cp-cta-action {
        width: 100%;
    }

    .cp-cta-title {
        font-size: 1.25rem;
    }

    .cp-cta-desc {
        font-size: 0.875rem;
    }

    .cp-cta-benefits {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .cp-cta-benefit {
        font-size: 0.8125rem;
    }

    .cp-cta-benefit-icon {
        width: 28px;
        height: 28px;
        font-size: 0.8125rem;
    }

    .cp-expand-btn {
        font-size: 0.8125rem;
    }

    .cp-payment-banner {
        font-size: 0.8125rem;
        padding: 10px 14px;
    }

    .cp-error-card {
        padding: 40px 24px;
    }

    .cp-error-title {
        font-size: 1.5rem;
    }

    .cp-error-actions {
        flex-direction: column;
    }

    .cp-error-btn {
        width: 100%;
        justify-content: center;
    }

    .cp-quiz-section {
        padding: 20px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .cp-container {
        padding: 0 12px;
    }

    .cp-title {
        font-size: 1.0625rem;
    }

    .cp-stats {
        gap: 5px;
    }

    .cp-stat-item {
        font-size: 0.6875rem;
        padding: 3px 8px;
    }

    .cp-video-player {
        border-radius: 8px;
        margin-bottom: 12px;
    }

    .cp-video-placeholder-icon {
        font-size: 3rem;
    }

    .cp-video-placeholder-title {
        font-size: 1rem;
    }

    .cp-video-placeholder-desc {
        font-size: 0.8125rem;
    }

    .cp-share-btn {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }

    .cp-content-header h3 {
        font-size: 0.9375rem;
    }

    .cp-section-name {
        font-size: 0.8125rem;
    }

    .cp-video-item-title {
        font-size: 0.75rem;
    }

    .cp-video-item-thumb {
        width: 64px;
        min-width: 64px;
        height: 36px;
    }

    .cp-cta-inner {
        border-radius: 12px;
    }

    .cp-cta-body {
        padding: 20px 16px;
    }

    .cp-cta-title {
        font-size: 1.125rem;
    }

    .cp-cta-enroll-btn {
        padding: 12px;
        font-size: 0.9375rem;
    }

    .cp-cta-amount {
        font-size: 1.625rem;
    }

    .cp-error-card {
        padding: 32px 16px;
    }

    .cp-error-icon {
        width: 80px;
        height: 80px;
    }

    .cp-error-icon i {
        font-size: 36px;
    }

    .cp-error-title {
        font-size: 1.25rem;
    }

    .cp-error-desc {
        font-size: 0.875rem;
    }
}

/* ========================================
   VIDEO PLAYER OVERRIDES (for modern-video-player)
   ======================================== */
.cp-video-player .video-section {
    margin-bottom: 0;
    border-radius: 0;
    box-shadow: none;
}

/* Preserve video-card-modern styles in dark theme */
.cp-page-wrapper .video-card-modern {
    background: #1d1d1d;
    border: 1px solid var(--cp-border);
}

.cp-page-wrapper .video-card-modern:hover {
    background: var(--cp-bg-elevated);
}

.cp-page-wrapper .video-card-modern.active {
    border-color: var(--cp-accent);
    background: rgba(59, 130, 246, 0.08);
}

.cp-page-wrapper .video-card-title {
    color: var(--cp-text-primary);
}

.cp-page-wrapper .video-card-meta-item {
    color: var(--cp-text-muted);
}

/* Markdown content inside dark theme */
.cp-page-wrapper .markdown-content {
    color: var(--cp-text-secondary);
}

.cp-page-wrapper .markdown-content h1,
.cp-page-wrapper .markdown-content h2,
.cp-page-wrapper .markdown-content h3,
.cp-page-wrapper .markdown-content h4,
.cp-page-wrapper .markdown-content h5,
.cp-page-wrapper .markdown-content h6 {
    color: var(--cp-text-primary);
}

.cp-page-wrapper .markdown-content a {
    color: var(--cp-accent);
}

.cp-page-wrapper .markdown-content code {
    background: var(--cp-bg-elevated);
    color: var(--cp-text-primary);
}

.cp-page-wrapper .markdown-content blockquote {
    border-left-color: var(--cp-accent);
    color: var(--cp-text-secondary);
}

/* Video placeholder (reused from old design, adapted for dark) */
.cp-page-wrapper .video-placeholder {
    min-height: unset;
    background: linear-gradient(135deg, #1a1a2e, #0f0f23);
}

.cp-page-wrapper .video-placeholder .placeholder-content {
    color: var(--cp-text-primary);
}

/* ========================================
   LIGHT MODE OVERRIDES
   ======================================== */
html:not(.dark-mode) .cp-page-wrapper {
    --cp-bg-page: #f8f9fb;
    --cp-bg-card: #ffffff;
    --cp-bg-elevated: #f0f2f5;
    --cp-bg-hover: #e8eaed;
    --cp-text-primary: #1a1a2e;
    --cp-text-secondary: #4a5568;
    --cp-text-muted: #8492a6;
    --cp-accent: #3b82f6;
    --cp-accent-hover: #2563eb;
    --cp-border: #e2e8f0;
    --cp-surface: #ffffff;
}

/* Page wrapper */
html:not(.dark-mode) .cp-page-wrapper {
    background: var(--cp-bg-page);
    color: var(--cp-text-primary);
}

/* Video Player */
html:not(.dark-mode) .cp-video-player {
    background: #1a1a2e;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

/* Video Placeholder - keep dark for cinematic feel */
html:not(.dark-mode) .cp-video-placeholder {
    background: linear-gradient(135deg, #1d1d1d 0%, #060708 100%);
}

/* Teacher bar */
html:not(.dark-mode) .cp-teacher-avatar {
    border-color: var(--cp-border);
}

/* Action buttons */
html:not(.dark-mode) .cp-action-btn {
    background: #ffffff;
    border-color: var(--cp-border);
    color: var(--cp-text-primary);
}

html:not(.dark-mode) .cp-action-btn:hover {
    background: var(--cp-bg-elevated);
    border-color: #cbd5e1;
}

html:not(.dark-mode) .cp-action-btn.primary {
    background: var(--cp-accent);
    border-color: var(--cp-accent);
    color: #ffffff;
}

html:not(.dark-mode) .cp-action-btn.primary:hover {
    background: var(--cp-accent-hover);
    border-color: var(--cp-accent-hover);
}

/* Stats */
html:not(.dark-mode) .cp-stat-item {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.06);
    color: var(--cp-text-secondary);
}

html:not(.dark-mode) .cp-stat-item:hover {
    background: rgba(0, 0, 0, 0.07);
    border-color: rgba(0, 0, 0, 0.08);
}

html:not(.dark-mode) .cp-stat-item i {
    color: var(--cp-text-muted);
}

html:not(.dark-mode) .cp-stat-item .cp-stat-highlight {
    color: #f59e0b;
}

/* Description box */
html:not(.dark-mode) .cp-description {
    background: #ffffff;
    border-color: var(--cp-border);
}

/* What You'll Learn */
html:not(.dark-mode) .cp-what-learn {
    background: #ffffff;
    border-color: var(--cp-border);
}

html:not(.dark-mode) .cp-what-learn-content .markdown-clamp::after {
    background: linear-gradient(to bottom, transparent, #ffffff);
}

/* Content Panel */
html:not(.dark-mode) .cp-content-panel {
    background: #ffffff;
    border-color: var(--cp-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

html:not(.dark-mode) .cp-content-header {
    border-bottom-color: var(--cp-border);
}

html:not(.dark-mode) .cp-content-list {
    scrollbar-color: #cbd5e1 transparent;
}

html:not(.dark-mode) .cp-content-list::-webkit-scrollbar-thumb {
    background: #cbd5e1;
}

/* Section Toggle */
html:not(.dark-mode) .cp-section-toggle {
    border-bottom-color: var(--cp-border);
}

html:not(.dark-mode) .cp-section-toggle:hover {
    background: rgba(0, 0, 0, 0.02);
}

/* Video Items */
html:not(.dark-mode) .cp-video-item {
    border-bottom-color: rgba(0, 0, 0, 0.04);
}

html:not(.dark-mode) .cp-video-item:hover {
    background: rgba(0, 0, 0, 0.02);
}

html:not(.dark-mode) .cp-video-item.active {
    background: rgba(59, 130, 246, 0.06);
}

html:not(.dark-mode) .cp-video-item-thumb {
    background: var(--cp-bg-elevated);
}

html:not(.dark-mode) .cp-video-item-badge.free {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

html:not(.dark-mode) .cp-video-item-badge.premium {
    background: rgba(0, 0, 0, 0.04);
    color: var(--cp-text-muted);
}

/* Related courses */
html:not(.dark-mode) .cp-related-card:hover {
    background: var(--cp-bg-elevated);
}

html:not(.dark-mode) .cp-related-thumb {
    background: var(--cp-bg-elevated);
}

/* Share buttons */
html:not(.dark-mode) .cp-share-btn {
    background: #ffffff;
    border-color: var(--cp-border);
}

html:not(.dark-mode) .cp-share-btn.twitter {
    color: #1a1a2e;
}

/* See All button */
html:not(.dark-mode) .cp-see-all-btn {
    border-color: var(--cp-border);
}

html:not(.dark-mode) .cp-see-all-btn:hover {
    background: rgba(59, 130, 246, 0.06);
    border-color: var(--cp-accent);
}

/* Quiz section */
html:not(.dark-mode) .cp-quiz-section {
    background: #ffffff;
    border-color: var(--cp-border);
}

/* Payment banners */
html:not(.dark-mode) .cp-payment-banner.error {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.2);
    color: #dc2626;
}

html:not(.dark-mode) .cp-payment-banner.warning {
    background: rgba(245, 158, 11, 0.08);
    border-color: rgba(245, 158, 11, 0.2);
    color: #d97706;
}

html:not(.dark-mode) .cp-payment-banner.info {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.2);
    color: #2563eb;
}

/* Enrollment error */
html:not(.dark-mode) .cp-enrollment-error {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.2);
    color: #dc2626;
}

/* CTA Section */
html:not(.dark-mode) .cp-cta-inner {
    background: linear-gradient(135deg, #3b82f6, #6366f1);
}

html:not(.dark-mode) .cp-cta-enroll-btn {
    background: #ffffff;
    color: var(--cp-accent);
}

html:not(.dark-mode) .cp-cta-enroll-btn:hover {
    background: #f0f4ff;
}

/* Error state */
html:not(.dark-mode) .cp-error-card {
    background: #ffffff;
    border-color: var(--cp-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

html:not(.dark-mode) .cp-error-btn.secondary {
    background: var(--cp-bg-elevated);
    color: var(--cp-text-secondary);
}

html:not(.dark-mode) .cp-error-btn.secondary:hover {
    background: var(--cp-bg-hover);
    color: var(--cp-text-primary);
}

/* Skeleton Light Mode */
html:not(.dark-mode) .cp-skeleton-video {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
}

html:not(.dark-mode) .cp-skeleton-bar,
html:not(.dark-mode) .cp-skeleton-avatar,
html:not(.dark-mode) .cp-skeleton-circle,
html:not(.dark-mode) .cp-skeleton-enroll-btn,
html:not(.dark-mode) .cp-skeleton-stat,
html:not(.dark-mode) .cp-skeleton-thumb,
html:not(.dark-mode) .cp-skeleton-related-thumb {
    background: #e2e8f0;
}

html:not(.dark-mode) .cp-skeleton-teacher-bar {
    border-bottom-color: rgba(0, 0, 0, 0.06);
}

html:not(.dark-mode) .cp-skeleton-learn {
    background: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.06);
}

html:not(.dark-mode) .cp-skeleton-content-panel {
    background: #ffffff;
    border-color: var(--cp-border);
}

html:not(.dark-mode) .cp-skeleton-content-header {
    border-bottom-color: var(--cp-border);
}

html:not(.dark-mode) .cp-skeleton-related {
    background: #ffffff;
    border-color: var(--cp-border);
}

html:not(.dark-mode) .cp-skeleton-related-card {
    border-bottom-color: rgba(0, 0, 0, 0.04);
}

/* Video card modern overrides for light mode */
html:not(.dark-mode) .cp-page-wrapper .video-card-modern {
    background: #ffffff;
    border-color: var(--cp-border);
}

html:not(.dark-mode) .cp-page-wrapper .video-card-modern:hover {
    background: var(--cp-bg-elevated);
}

html:not(.dark-mode) .cp-page-wrapper .video-card-modern.active {
    border-color: var(--cp-accent);
    background: rgba(59, 130, 246, 0.04);
}

/* Markdown in light mode */
html:not(.dark-mode) .cp-page-wrapper .markdown-content code {
    background: var(--cp-bg-elevated);
    color: var(--cp-text-primary);
}

/* Video placeholder (old) in light mode */
html:not(.dark-mode) .cp-page-wrapper .video-placeholder {
    background: linear-gradient(135deg, #1d1d1d, #060708);
}