:root {
            --hb-primary: #1B4D3E;           /* ডার্ক গ্রীন - প্রধান */
            --hb-dark-green: #0F3A2E;         /* আরও ডার্ক গ্রীন */
            --hb-purple: #800080;             /* পার্পল */
            --hb-deep-pink: #FF1493;          /* ডিপ পিংক */
            --hb-purple-light: #f3e8f3;       /* হালকা পার্পল */
            --hb-pink-light: #fff0f7;         /* হালকা পিংক */
            --hb-primary-light: #e8f3ef;      /* হালকা গ্রীন */
            
            --text-dark: #1A1A1A;
            --text-light: #4A4A4A;
            --text-muted: #666666;
            --bg-light: #F8F9FA;
            --bg-white: #FFFFFF;
            --border-light: #EEEEEE;
            
            --shadow-sm: 0 5px 15px rgba(27, 77, 62, 0.08);
            --shadow-md: 0 10px 25px rgba(128, 0, 128, 0.1);
            --shadow-lg: 0 20px 40px rgba(255, 20, 147, 0.15);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Mina', sans-serif;
        }

        body {
            background-color: var(--bg-white);
            padding-top: 80px;
            color: var(--text-dark);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            z-index: 9999;
            padding: 10px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            backdrop-filter: blur(10px);
        }

        .main-nav #LOGO {
            width: 120px;
            height: auto;
            transition: transform var(--transition);
        }

        .main-nav #LOGO:hover {
            transform: scale(1.05);
        }

        .profile-img {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            border: 2px solid var(--hb-primary);
            object-fit: cover;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(27, 77, 62, 0.2);
        }

        .profile-img:hover {
            transform: scale(1.1);
            border-color: var(--hb-deep-pink);
            box-shadow: 0 4px 12px rgba(255, 20, 147, 0.3);
        }

        .page-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 40px 20px;
            background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-light) 100%);
            border-radius: 24px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(27, 77, 62, 0.03) 0%, rgba(128, 0, 128, 0.02) 50%, rgba(255, 20, 147, 0.01) 100%);
            animation: rotate 30s linear infinite;
        }

        @keyframes rotate {
            from { transform: rotate(0); }
            to { transform: rotate(360deg); }
        }

        .boss-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            color: #fff;
            padding: 8px 30px;
            border-radius: 50px;
            font-size: clamp(14px, 4vw, 18px);
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
            position: relative;
            box-shadow: 0 5px 15px rgba(128, 0, 128, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

        .page-header h1 {
            font-size: clamp(28px, 6vw, 42px);
            font-weight: 700;
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple), var(--hb-deep-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin: 15px 0;
            position: relative;
        }

        .page-header .subtitle {
            font-size: clamp(16px, 4vw, 20px);
            font-weight: 500;
            color: var(--hb-purple);
            letter-spacing: 0.5px;
        }

        .page-header .subtitle i {
            color: var(--hb-deep-pink);
        }

        .page-header hr {
            border: none;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--hb-primary), var(--hb-purple), var(--hb-deep-pink), transparent);
            width: min(300px, 80%);
            margin: 25px auto;
        }

        .page-header .description {
            color: var(--text-muted);
            font-size: clamp(14px, 3vw, 16px);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
            padding: 0 15px;
        }

        .channel-header {
            background: var(--bg-light);
            border-radius: 20px;
            padding: clamp(20px, 4vw, 35px);
            margin-bottom: 45px;
            display: flex;
            align-items: center;
            gap: clamp(20px, 4vw, 40px);
            flex-wrap: wrap;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .channel-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--hb-primary), var(--hb-purple), var(--hb-deep-pink));
        }

        .channel-header:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .channel-icon {
            width: clamp(80px, 15vw, 120px);
            height: clamp(80px, 15vw, 120px);
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: clamp(40px, 8vw, 60px);
            color: #fff;
            box-shadow: 0 8px 20px rgba(128, 0, 128, 0.2);
            border: 3px solid rgba(255, 255, 255, 0.5);
            flex-shrink: 0;
        }

        .channel-info {
            flex: 1;
            min-width: 280px;
        }

        .channel-info h2 {
            font-size: clamp(22px, 5vw, 32px);
            font-weight: 700;
            color: var(--hb-primary);
            margin-bottom: 10px;
        }

        .channel-info p {
            font-size: clamp(14px, 3vw, 16px);
            color: var(--text-light);
            margin-bottom: 15px;
            line-height: 1.6;
        }

        .channel-info p i {
            color: var(--hb-deep-pink);
            margin-right: 5px;
        }

        .btn-subscribe {
            background: linear-gradient(135deg, #FF0000, #CC0000);
            color: #fff;
            border: none;
            padding: clamp(10px, 2vw, 14px) clamp(20px, 4vw, 35px);
            border-radius: 50px;
            font-size: clamp(14px, 3vw, 16px);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(255, 0, 0, 0.2);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-subscribe:hover {
            background: linear-gradient(135deg, #CC0000, #990000);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 0, 0, 0.3);
        }

        .btn-subscribe i {
            font-size: 18px;
        }

        .section-title {
            font-size: clamp(20px, 5vw, 26px);
            font-weight: 700;
            color: var(--hb-primary);
            margin: 45px 0 25px;
            padding-bottom: 12px;
            border-bottom: 3px solid transparent;
            border-image: linear-gradient(90deg, var(--hb-primary), var(--hb-deep-pink));
            border-image-slice: 1;
            display: inline-block;
            position: relative;
        }

        .section-title i {
            color: var(--hb-deep-pink);
            margin-right: 10px;
        }

        .playlist-card {
            background: var(--bg-white);
            border-radius: 20px;
            overflow: hidden;
            margin-bottom: 25px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }

        .playlist-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--hb-primary);
        }

        .playlist-header {
            background: linear-gradient(90deg, var(--bg-light), var(--bg-white));
            padding: clamp(15px, 3vw, 22px) clamp(20px, 4vw, 25px);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .playlist-header:hover {
            background: linear-gradient(90deg, var(--hb-primary-light), var(--bg-light));
        }

        .playlist-header h3 {
            font-size: clamp(16px, 4vw, 20px);
            font-weight: 700;
            color: var(--text-dark);
            margin: 0;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .playlist-header h3 i {
            font-size: clamp(20px, 4vw, 24px);
            color: var(--hb-purple);
        }

        .playlist-header .video-count {
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            color: #fff;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: clamp(12px, 3vw, 14px);
            font-weight: 600;
            white-space: nowrap;
        }

        .playlist-header .toggle-icon {
            font-size: clamp(16px, 4vw, 20px);
            color: var(--hb-deep-pink);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .playlist-header.collapsed .toggle-icon {
            transform: rotate(-90deg);
        }

        .video-list {
            max-height: 600px;
            overflow-y: auto;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 20px;
            background: var(--bg-white);
        }

        .video-list.collapsed {
            max-height: 0;
            padding: 0 20px;
            overflow: hidden;
        }

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

        .video-list::-webkit-scrollbar-track {
            background: #F0F0F0;
            border-radius: 10px;
        }

        .video-list::-webkit-scrollbar-thumb {
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            border-radius: 10px;
        }

        .video-list::-webkit-scrollbar-thumb:hover {
            background: linear-gradient(135deg, var(--hb-dark-green), var(--hb-deep-pink));
        }

        .video-item {
            display: flex;
            align-items: center;
            gap: clamp(15px, 3vw, 25px);
            padding: clamp(12px, 2vw, 18px);
            border-bottom: 1px solid #F0F0F0;
            cursor: pointer;
            transition: var(--transition);
            border-radius: 12px;
        }

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

        .video-item:hover {
            background: var(--hb-primary-light);
            transform: translateX(5px);
            box-shadow: var(--shadow-sm);
        }

        .video-thumb {
            width: min(200px, 30%);
            max-width: 220px;
            min-width: 140px;
            aspect-ratio: 16/9;
            background: #F0F0F0;
            border-radius: 10px;
            position: relative;
            overflow: hidden;
            flex-shrink: 0;
            border: 2px solid transparent;
            transition: border-color 0.3s ease;
        }

        .video-item:hover .video-thumb {
            border-color: var(--hb-deep-pink);
        }

        .video-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .video-item:hover .video-thumb img {
            transform: scale(1.05);
        }

        .video-thumb .play-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(27, 77, 62, 0.7), rgba(128, 0, 128, 0.7), rgba(255, 20, 147, 0.7));
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .video-item:hover .play-overlay {
            opacity: 1;
        }

        .video-thumb .play-overlay i {
            color: #fff;
            font-size: clamp(30px, 6vw, 48px);
            text-shadow: 0 2px 10px rgba(0,0,0,0.5);
            animation: pulse 1.5s ease infinite;
        }

        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }

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

        .video-title {
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
            font-size: clamp(14px, 3vw, 16px);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .video-meta {
            display: flex;
            flex-wrap: wrap;
            gap: clamp(10px, 2vw, 20px);
            font-size: clamp(11px, 2.5vw, 13px);
            color: #777777;
        }

        .video-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: linear-gradient(135deg, var(--hb-primary-light), var(--hb-pink-light));
            padding: 4px 10px;
            border-radius: 20px;
            border: 1px solid rgba(27, 77, 62, 0.1);
        }

        .video-meta i {
            color: var(--hb-deep-pink);
            font-size: 12px;
        }

        .modal-content {
            border-radius: 20px;
            overflow: hidden;
            border: none;
            box-shadow: var(--shadow-lg);
        }

        .modal-header {
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
            padding: 15px 20px;
        }

        .modal-header h5 {
            font-size: clamp(16px, 4vw, 18px);
            font-weight: 600;
            color: #fff;
        }

        .modal-header .btn-close {
            background: rgba(255, 255, 255, 0.3);
            opacity: 1;
            transition: var(--transition);
            border-radius: 50%;
            padding: 8px;
        }

        .modal-header .btn-close:hover {
            background: rgba(255, 255, 255, 0.5);
            transform: rotate(90deg);
        }

        .modal-body {
            padding: 0;
            background: #000000;
        }

        @media (max-width: 768px) {
            body {
                padding-top: 70px;
            }

            .main-nav {
                padding: 8px 16px;
            }

            .main-nav #LOGO {
                width: 100px;
            }

            .profile-img {
                width: 36px;
                height: 36px;
            }

            .page-header {
                padding: 30px 15px;
                margin-bottom: 30px;
                border-radius: 18px;
            }

            .channel-header {
                flex-direction: column;
                text-align: center;
                padding: 25px 20px;
            }

            .channel-info {
                text-align: center;
            }

            .video-item {
                flex-direction: column;
                align-items: start;
            }

            .video-thumb {
                width: 100%;
                max-width: none;
                aspect-ratio: 16/9;
            }

            .video-meta {
                justify-content: flex-start;
            }

            .video-item:hover {
                transform: translateY(-3px);
            }
        }

        @media (max-width: 480px) {
            body {
                padding-top: 60px;
            }

            .main-nav {
                padding: 6px 12px;
            }

            .main-nav #LOGO {
                width: 85px;
            }

            .profile-img {
                width: 32px;
                height: 32px;
            }

            .page-header {
                padding: 25px 12px;
                border-radius: 16px;
            }

            .boss-badge {
                padding: 6px 20px;
            }

            .playlist-header h3 {
                gap: 8px;
            }

            .video-meta span {
                padding: 3px 8px;
            }

            .modal-dialog {
                margin: 10px;
            }
        }

        @media (max-height: 500px) and (orientation: landscape) {
            .page-header {
                padding: 15px;
            }

            .channel-header {
                padding: 15px;
            }

            .video-list {
                max-height: 350px;
            }
        }

        @media (hover: none) {
            .playlist-card:hover,
            .video-item:hover,
            .btn-subscribe:hover {
                transform: none;
            }

            .video-thumb .play-overlay {
                opacity: 1;
                background: rgba(27, 77, 62, 0.5);
            }
        }

        .skeleton {
            background: linear-gradient(90deg, #F0F0F0 25%, #E0E0E0 50%, #F0F0F0 75%);
            background-size: 200% 100%;
            animation: loading 1.5s infinite;
        }

        @keyframes loading {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }