/**
 * Keratrichology YouTube Shorts Slider Styling
 * Premium Clinic Aesthetic: Luxury Gold Accents, Clean Glassmorphism, Micro-animations
 */

:root {
    --kts-gold: #cda250;
    --kts-gold-light: #e5c184;
    --kts-charcoal: #111111;
    --kts-charcoal-light: #1f1f1f;
    --kts-white: #ffffff;
    --kts-white-soft: #f9f9f9;
    --kts-grey-dark: #606060;
    --kts-grey-light: #f1f1f1;
    --kts-card-bg: rgba(255, 255, 255, 0.07);
    --kts-card-border: rgba(255, 255, 255, 0.15);
    --kts-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    --kts-transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Outer wrapper container */
.kts-outer-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 40px auto;
    font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--kts-charcoal);
}

/* 1. YouTube Channel Header (High-Fidelity Replica of Kera Clinic Profile) */
.kts-channel-header-box {
    width: 100%;
    background: rgba(255, 255, 255, 0.03) !important;
    padding: 10px 10px 25px 10px;
    border-radius: 0;
    border: none !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
    box-shadow: none !important;
    margin-bottom: 30px;
    box-sizing: border-box;
}

.kts-channel-profile-section {
    display: flex;
    gap: 30px;
    align-items: flex-start;
}

.kts-logo-avatar {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
}

.kts-avatar-inner {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    display: flex;
    background: #fff;
    border: 2px solid var(--kts-gold) !important;
    transition: var(--kts-transition);
}

.kts-avatar-inner:hover {
    transform: scale(1.05);
}

.kts-svg-logo-graphic {
    width: 100%;
    height: 100%;
    display: block;
}

.kts-profile-info-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.kts-channel-title-main {
    font-size: 28px !important;
    font-weight: 700 !important;
    color: var(--kts-white) !important;
    margin: 0 0 8px 0 !important;
    letter-spacing: -0.5px;
}

.kts-channel-metadata-row {
    font-size: 14px !important;
    color: rgba(255, 255, 255, 0.6) !important;
    margin: 0 0 12px 0 !important;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.kts-handle {
    font-weight: 600 !important;
    color: var(--kts-gold-light) !important;
}

.kts-dot-separator {
    color: rgba(255, 255, 255, 0.3) !important;
}

.kts-channel-description-text {
    font-size: 14px !important;
    line-height: 1.6 !important;
    color: rgba(255, 255, 255, 0.7) !important;
    margin: 0 0 12px 0 !important;
    max-width: 750px;
}

.kts-more-link {
    color: var(--kts-gold-light) !important;
    font-weight: 700 !important;
    text-decoration: none !important;
}

.kts-more-link:hover {
    text-decoration: underline !important;
}

.kts-channel-links-row {
    font-size: 14px !important;
    color: rgba(255, 255, 255, 0.5) !important;
    margin: 0 0 20px 0 !important;
    display: flex;
    align-items: center;
    gap: 6px;
}

.kts-link-icon-svg {
    color: var(--kts-gold-light) !important;
}

.kts-website-link {
    color: var(--kts-gold-light) !important;
    font-weight: 600 !important;
    text-decoration: none !important;
}

.kts-website-link:hover {
    text-decoration: underline !important;
}

.kts-links-extra {
    color: rgba(255, 255, 255, 0.4) !important;
}

/* Subscribe pill button */
.kts-subscribe-button {
    display: inline-block;
    background: var(--kts-gold) !important;
    color: var(--kts-charcoal) !important;
    padding: 10px 26px !important;
    font-size: 14px !important;
    font-weight: 700 !important;
    border-radius: 50px !important;
    text-decoration: none !important;
    transition: var(--kts-transition) !important;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3) !important;
    text-align: center;
}

.kts-subscribe-button:hover {
    background: var(--kts-gold-light) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 16px rgba(205,162,80,0.5) !important;
}

.kts-subscribe-button:active {
    transform: translateY(0) !important;
}

/* 2. Slider Track & Container */
.kts-slider-container-outer {
    width: 100%;
    padding: 30px 20px;
    background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.05) 0%, transparent 100%), var(--kts-charcoal);
    border-radius: 24px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.25);
    color: var(--kts-white);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-sizing: border-box;
}

.kts-slider-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 10px 0 25px 0;
}

.kts-slider-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    will-change: transform;
}

.kts-slide {
    flex-shrink: 0;
    padding: 0 12px;
    box-sizing: border-box;
}

/* Link Wrapper */
.kts-card-link {
    text-decoration: none !important;
    display: block;
    outline: none;
}

/* High-Fidelity Glassmorphism Card */
.kts-card {
    background: var(--kts-card-bg);
    border: 1px solid var(--kts-card-border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--kts-shadow);
    transition: var(--kts-transition);
    position: relative;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.kts-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(180deg, rgba(205, 162, 80, 0.05) 0%, transparent 60%);
    opacity: 0;
    transition: var(--kts-transition);
    z-index: 1;
}

/* Thumbnail Aspect Ratio (9:16) */
.kts-thumbnail-container {
    position: relative;
    width: 100%;
    padding-top: 155%; /* 9:16 aspect ratio */
    overflow: hidden;
    background-color: #000;
}

.kts-thumbnail {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Overlay Glass Effect */
.kts-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.65));
    opacity: 0.85;
    transition: var(--kts-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

/* Premium Gold Play Button */
.kts-play-button {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid var(--kts-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transform: scale(0.85);
    opacity: 0.8;
    transition: var(--kts-transition);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.kts-play-svg {
    margin-left: 4px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.2));
    transition: var(--kts-transition);
}

/* Card Information */
.kts-card-info {
    padding: 16px;
    background: rgba(17, 17, 17, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    flex-grow: 1;
    display: flex;
    align-items: center;
    z-index: 3;
}

.kts-video-title {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: var(--kts-transition);
}

/* Hover States (Micro-animations) */
.kts-card:hover {
    transform: translateY(-8px);
    border-color: rgba(205, 162, 80, 0.5);
    box-shadow: 0 20px 40px rgba(205, 162, 80, 0.15);
}

.kts-card:hover::before {
    opacity: 1;
}

.kts-card:hover .kts-thumbnail {
    transform: scale(1.08);
}

.kts-card:hover .kts-overlay {
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.75));
}

.kts-card:hover .kts-play-button {
    transform: scale(1);
    opacity: 1;
    background: var(--kts-gold);
    border-color: var(--kts-gold-light);
    box-shadow: 0 0 25px rgba(205, 162, 80, 0.6);
}

.kts-card:hover .kts-video-title {
    color: var(--kts-gold-light);
}

/* Slider Controls */
.kts-slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--kts-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: var(--kts-transition);
    outline: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.kts-prev { left: 10px; }
.kts-next { right: 10px; }

.kts-slider-nav:hover {
    background: var(--kts-gold);
    border-color: var(--kts-gold-light);
    color: var(--kts-white);
    transform: translateY(-50%) scale(1.08);
    box-shadow: 0 0 20px rgba(205, 162, 80, 0.5);
}

.kts-slider-nav:active {
    transform: translateY(-50%) scale(0.95);
}

/* Pagination Dots */
.kts-slider-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 15px;
}

.kts-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #cccccc !important;
    cursor: pointer;
    transition: var(--kts-transition);
}

.kts-dot.active {
    width: 26px;
    border-radius: 5px;
    background: var(--kts-gold);
    box-shadow: 0 0 10px rgba(205, 162, 80, 0.5);
}

/* 3. Interactive Lightbox Modal Player Styles */
.kts-lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    display: none; /* Controlled via JS */
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.kts-lightbox-overlay.active {
    display: flex;
}

.kts-lightbox-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.kts-lightbox-container {
    position: relative;
    width: 90%;
    max-width: 850px;
    height: 80vh;
    max-height: 700px;
    background: #141414;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    overflow: hidden;
    z-index: 10;
    box-shadow: 0 25px 60px rgba(0,0,0,0.6);
    display: flex;
    animation: ktsFadeScale 0.4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
    box-sizing: border-box;
}

@keyframes ktsFadeScale {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Lightbox Close Button */
.kts-lightbox-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--kts-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 20;
    transition: var(--kts-transition);
}

.kts-lightbox-close:hover {
    background: #cc3333;
    border-color: #ff6666;
    transform: rotate(90deg);
}

.kts-lightbox-content {
    display: flex;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
}

/* Left Section: Video Player Container */
.kts-lightbox-player-wrapper {
    flex: 1.1;
    background: #000;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.kts-iframe-container {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

#kts-lightbox-iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: #000;
}

/* Right Section: Sidebar Actions & Details Panel */
.kts-lightbox-sidebar {
    flex: 0.9;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    background: #181818;
    color: var(--kts-white);
    box-sizing: border-box;
    overflow-y: auto;
}

.kts-sidebar-top {
    margin-bottom: 25px;
}

/* Sidebar Profile Row */
.kts-sidebar-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 25px;
}

.kts-sidebar-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: #fff;
}

.kts-sidebar-profile-text {
    flex-grow: 1;
}

.kts-sidebar-profile-text h4 {
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 2px 0;
    color: var(--kts-white);
}

.kts-sidebar-profile-text p {
    font-size: 12px;
    color: #aaa;
    margin: 0;
}

/* Subscribe inside Sidebar */
.kts-sidebar-subscribe-btn {
    font-size: 12px;
    font-weight: 700;
    background: var(--kts-white);
    color: #000 !important;
    padding: 8px 16px;
    border-radius: 30px;
    text-decoration: none !important;
    transition: var(--kts-transition);
}

.kts-sidebar-subscribe-btn:hover {
    background: #e6e6e6;
    transform: scale(1.05);
}

/* Sidebar Video Title */
.kts-lightbox-video-title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    color: rgba(255,255,255,0.95);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 4. Action Panel: Like, Share, Copy Link Buttons */
.kts-sidebar-actions-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: auto;
    margin-bottom: 20px;
}

.kts-action-pill {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--kts-white);
    padding: 12px 20px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: var(--kts-transition);
    width: 100%;
    text-align: left;
    box-sizing: border-box;
}

.kts-action-pill:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.kts-action-pill:active {
    transform: translateY(0);
}

.kts-like-pill:hover {
    border-color: rgba(205, 162, 80, 0.4);
    color: var(--kts-gold-light);
}

.kts-like-pill.liked {
    background: rgba(205, 162, 80, 0.15);
    border-color: var(--kts-gold);
    color: var(--kts-gold-light);
}

.kts-btn-svg {
    flex-shrink: 0;
    transition: var(--kts-transition);
}

.kts-like-pill.liked .kts-btn-svg {
    transform: scale(1.2);
}

/* Share via Section Divider */
.kts-share-divider {
    display: flex;
    align-items: center;
    margin: 10px 0 5px 0;
    color: #888;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kts-share-divider::after {
    content: '';
    flex-grow: 1;
    height: 1px;
    background: rgba(255,255,255,0.08);
    margin-left: 10px;
}

/* Share Grid for WhatsApp & Email */
.kts-share-social-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.kts-social-pill {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none !important;
    color: var(--kts-white) !important;
    transition: var(--kts-transition);
    box-sizing: border-box;
}

.kts-whatsapp {
    background: #25d366;
}

.kts-whatsapp:hover {
    background: #20ba59;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.3);
}

.kts-email {
    background: #0072c6;
}

.kts-email:hover {
    background: #0062ab;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 114, 198, 0.3);
}

.kts-sidebar-footer {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 15px;
    font-size: 11px;
    color: #666;
    text-align: center;
}

/* 5. Mobile & Tablet Responsiveness Overrides */
@media (max-width: 992px) {
    .kts-channel-profile-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 20px;
    }
    
    .kts-profile-info-container {
        align-items: center;
    }

    .kts-channel-links-row {
        justify-content: center;
    }

    .kts-channel-metadata-row {
        justify-content: center;
    }

    .kts-channel-title-main {
        font-size: 26px;
    }
}

@media (max-width: 768px) {
    .kts-slider-container-outer {
        padding: 20px 10px;
    }

    .kts-slider-nav {
        width: 38px;
        height: 38px;
    }
    
    .kts-prev { left: 5px; }
    .kts-next { right: 5px; }

    /* Lightbox transforms to single vertical list on mobile screen */
    .kts-lightbox-container {
        height: 90vh;
        max-height: 600px;
        flex-direction: column;
    }

    .kts-lightbox-content {
        flex-direction: column;
    }

    .kts-lightbox-player-wrapper {
        flex: 1; /* Split screen height */
        width: 100%;
        height: 50%;
    }

    .kts-lightbox-sidebar {
        flex: 1;
        width: 100%;
        height: 50%;
        padding: 20px;
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    
    .kts-sidebar-profile {
        margin-bottom: 12px;
    }
    
    .kts-lightbox-video-title {
        font-size: 14px;
    }

    .kts-sidebar-actions-panel {
        gap: 8px;
        margin-top: 15px;
    }

    .kts-action-pill {
        padding: 8px 12px;
        font-size: 13px;
    }

    .kts-share-divider {
        margin: 5px 0;
    }

    .kts-social-pill {
        padding: 8px;
        font-size: 12px;
    }
}

/* ==========================================================================
   4. Instagram Sunset Theme and Full-Width Toggles
   ========================================================================== */

/* Instagram Theme Modifier */
.kts-instagram-theme {
    --kts-gold: #cda250; /* Same default Gold as YouTube to match brand */
    --kts-gold-light: #e5c184; /* Soft Light Gold */
    border-color: rgba(255, 255, 255, 0.08) !important;
}

/* Sunset Gradient for Follow Button -> Now Black as requested */
.kts-instagram-theme .kts-subscribe-button,
.kts-instagram-theme .kts-sidebar-subscribe-btn {
    background: #000000 !important;
    color: #ffffff !important;
    border: 1px solid #000000 !important;
    box-shadow: none !important;
}

.kts-instagram-theme .kts-subscribe-button:hover,
.kts-instagram-theme .kts-sidebar-subscribe-btn:hover {
    background: #333333 !important;
    border-color: #333333 !important;
    box-shadow: none !important;
    transform: translateY(-2px) !important;
}

/* Instagram outline active pagination dots */
.kts-instagram-theme .kts-dot.active {
    background: var(--kts-gold) !important;
    box-shadow: none !important;
}

/* Card hover highlights for Instagram theme */
.kts-instagram-theme .kts-card:hover {
    border-color: var(--kts-gold) !important;
    box-shadow: none !important;
}

.kts-instagram-theme .kts-card:hover .kts-play-button {
    background: var(--kts-gold) !important;
    border-color: var(--kts-gold-light) !important;
    box-shadow: none !important;
}

.kts-instagram-theme .kts-card:hover .kts-video-title {
    color: var(--kts-gold-light) !important;
}

.kts-instagram-theme .kts-slider-nav:hover {
    background: var(--kts-gold) !important;
    border-color: var(--kts-gold-light) !important;
    box-shadow: none !important;
}

/* Full-Width Section Layouts */
.kts-outer-wrapper.kts-full-width {
    max-width: 100% !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
}

.kts-outer-wrapper.kts-full-width .kts-slider-container-outer {
    border-radius: 0 !important;
    border-left: none !important;
    border-right: none !important;
    padding-left: 5% !important;
    padding-right: 5% !important;
}