/* ==========================================================================
   QUANG CAO YOUTUBE PRO - STYLESHEET
   ========================================================================== */

.qc-youtube-gallery-wrap {
    margin: 30px 0;
}

.qc-yt-grid {
    display: grid;
    gap: 25px;
}

.qc-cols-2 { grid-template-columns: repeat(2, 1fr); }
.qc-cols-3 { grid-template-columns: repeat(3, 1fr); }
.qc-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Video Card */
.qc-yt-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.qc-yt-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.12);
    border-color: #ff0000;
}

.qc-yt-thumb-box {
    position: relative;
    aspect-ratio: 16 / 9;
    background: #000;
    cursor: pointer;
    overflow: hidden;
}

.qc-yt-thumb-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.qc-yt-card:hover .qc-yt-thumb-box img {
    transform: scale(1.06);
    opacity: 0.9;
}

/* Play Button Overlay */
.qc-yt-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 42px;
    background: rgba(255, 0, 0, 0.9);
    color: #ffffff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.5);
    transition: all 0.3s ease;
}

.qc-yt-card:hover .qc-yt-play-btn {
    background: #ff0000;
    transform: translate(-50%, -50%) scale(1.15);
    box-shadow: 0 6px 20px rgba(255, 0, 0, 0.7);
}

.qc-yt-badge {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.75);
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.qc-yt-body {
    padding: 18px;
    flex-grow: 1;
}

.qc-yt-title {
    font-size: 16px;
    font-weight: 700;
    color: #1e293b;
    margin: 0 0 8px 0;
    line-height: 1.4;
    transition: color 0.2s;
}

.qc-yt-card:hover .qc-yt-title {
    color: #d60000;
}

.qc-yt-desc {
    font-size: 13px;
    color: #64748b;
    margin: 0;
    line-height: 1.5;
}

/* Subscribe Banner Box */
.qc-yt-subscribe-card {
    background: linear-gradient(135deg, #18181b 0%, #27272a 100%);
    color: #ffffff;
    border-radius: 14px;
    padding: 25px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    margin: 35px 0;
}

.yt-brand-icon {
    font-size: 48px;
    color: #ff0000;
}

.yt-info {
    flex-grow: 1;
}

.yt-info h3 {
    color: #ffffff;
    font-size: 20px;
    margin: 0 0 6px 0;
}

.yt-info p {
    color: #a1a1aa;
    margin: 0;
    font-size: 14px;
}

.qc-yt-sub-btn {
    background: #ff0000;
    color: #ffffff;
    font-weight: 800;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.4);
    transition: all 0.3s;
    white-space: nowrap;
}

.qc-yt-sub-btn:hover {
    background: #cc0000;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 0, 0, 0.6);
}

/* Modal Lightbox Video Player */
.qc-yt-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.88);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 999999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.qc-yt-modal-overlay.active {
    display: flex;
}

.qc-yt-modal-content {
    position: relative;
    max-width: 900px;
    width: 100%;
    animation: ytZoomIn 0.3s ease;
}

@keyframes ytZoomIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.qc-yt-modal-close {
    position: absolute;
    top: -45px;
    right: 0;
    background: transparent;
    border: none;
    color: #ffffff;
    font-size: 36px;
    cursor: pointer;
    line-height: 1;
}

.qc-yt-iframe-wrap {
    position: relative;
    aspect-ratio: 16 / 9;
    width: 100%;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.qc-yt-iframe-wrap iframe {
    width: 100%;
    height: 100%;
}

/* Responsive */
@media (max-width: 900px) {
    .qc-cols-3, .qc-cols-4 { grid-template-columns: repeat(2, 1fr); }
    .qc-yt-subscribe-card { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
    .qc-cols-2, .qc-cols-3, .qc-cols-4 { grid-template-columns: 1fr; }
}