:root {
            --primary: #dc2626;
            --primary-dark: #b91c1c;
            --primary-light: #fecaca;
            --secondary: #1e3a5f;
            --secondary-light: #2d5a87;
            --gold: #d4af37;
            --gold-light: #f4e4ba;
            --success: #059669;
            --success-light: #d1fae5;
            --info: #0284c7;
            --info-light: #e0f2fe;
            --warning: #d97706;
            --warning-light: #fef3c7;
            --dark: #111827;
            --gray: #6b7280;
            --gray-light: #f3f4f6;
            --white: #ffffff;
            --shadow: 0 10px 40px rgba(0,0,0,0.1);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
            --radius: 20px;
            --radius-sm: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Cairo', sans-serif;
            background: var(--gray-light);
            color: var(--dark);
            line-height: 1.8;
            overflow-x: hidden;
        }

        /* Loader */
        .loader-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary-dark) 100%);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            transition: opacity 0.5s, visibility 0.5s;
        }

        .loader-wrapper.hidden {
            opacity: 0;
            visibility: hidden;
        }

        .loader {
            width: 80px;
            height: 80px;
            border: 4px solid rgba(255,255,255,0.2);
            border-top-color: var(--gold);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        .loader-text {
            color: white;
            margin-top: 20px;
            font-size: 1.2rem;
            font-weight: 600;
        }

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

        /* Navigation */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
            transition: var(--transition);
        }

        .navbar.scrolled {
            background: rgba(255,255,255,0.95);
            box-shadow: 0 4px 30px rgba(0,0,0,0.15);
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--dark);
        }

        .logo-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
        }

        .logo-text {
            font-weight: 800;
            font-size: 1.3rem;
        }

        .logo-text span {
            color: var(--primary);
        }

        .nav-menu {
            display: flex;
            gap: 8px;
            list-style: none;
        }

        .nav-link {
            padding: 10px 20px;
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            border-radius: 30px;
            transition: var(--transition);
            font-size: 0.95rem;
        }

        .nav-link:hover, .nav-link.active {
            background: var(--primary);
            color: white;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--dark);
        }

        /* Mobile Menu */
        @media (max-width: 992px) {
            .menu-toggle {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 80px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                gap: 10px;
                box-shadow: var(--shadow);
                transform: translateY(-150%);
                transition: var(--transition);
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-link {
                display: block;
                text-align: center;
                padding: 15px;
                background: var(--gray-light);
                border-radius: var(--radius-sm);
            }
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            background: linear-gradient(135deg, var(--secondary) 0%, #0f172a 100%);
            position: relative;
            display: flex;
            align-items: center;
            overflow: hidden;
            padding-top: 80px;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }

        .hero-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 40px 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-content {
            color: white;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 175, 55, 0.2);
            border: 1px solid var(--gold);
            color: var(--gold);
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 25px;
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 25px;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--gold) 0%, #f4e4ba 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 35px;
            max-width: 500px;
        }

        .hero-buttons {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 15px 35px;
            border-radius: 50px;
            font-family: 'Cairo', sans-serif;
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            box-shadow: 0 10px 30px rgba(220, 38, 38, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(220, 38, 38, 0.5);
        }

        .btn-outline {
            background: transparent;
            color: white;
            border: 2px solid rgba(255,255,255,0.3);
        }

        .btn-outline:hover {
            background: white;
            color: var(--dark);
            border-color: white;
        }

        .hero-visual {
            position: relative;
        }

        .hero-image-container {
            position: relative;
            width: 100%;
            max-width: 500px;
            margin: 0 auto;
        }

        .hero-karate-icon {
            width: 100%;
            height: 400px;
            background: linear-gradient(135deg, rgba(220, 38, 38, 0.2) 0%, rgba(220, 38, 38, 0.1) 100%);
            border-radius: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15rem;
            position: relative;
            overflow: hidden;
        }

        .hero-karate-icon::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
            opacity: 0.3;
            animation: pulse-glow 3s ease-in-out infinite;
        }

        @keyframes pulse-glow {
            0%, 100% { transform: scale(1); opacity: 0.3; }
            50% { transform: scale(1.2); opacity: 0.5; }
        }

        .floating-cards {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
        }

        .floating-card {
            position: absolute;
            background: white;
            padding: 15px 20px;
            border-radius: 15px;
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            gap: 10px;
            animation: float 4s ease-in-out infinite;
        }

        .floating-card:nth-child(1) {
            top: 10%;
            right: -20px;
            animation-delay: 0s;
        }

        .floating-card:nth-child(2) {
            bottom: 20%;
            left: -30px;
            animation-delay: 1s;
        }

        .floating-card:nth-child(3) {
            top: 50%;
            right: -40px;
            animation-delay: 2s;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-15px); }
        }

        .floating-card-icon {
            width: 45px;
            height: 45px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
        }

        .floating-card-text {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--dark);
        }

        /* Stats Section */
        .stats-section {
            background: white;
            padding: 60px 20px;
            margin-top: -50px;
            position: relative;
            z-index: 10;
        }

        .stats-container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            padding: 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }

        .stat-item {
            text-align: center;
            padding: 20px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: var(--gray-light);
            transform: translateY(-5px);
        }

        .stat-icon {
            width: 70px;
            height: 70px;
            margin: 0 auto 15px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .stat-label {
            color: var(--gray);
            font-weight: 600;
        }

        /* Section Styles */
        .section {
            padding: 100px 20px;
        }

        .section-container {
            max-width: 1400px;
            margin: 0 auto;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .section-title {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .section-title span {
            color: var(--primary);
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--gray);
            max-width: 600px;
            margin: 0 auto;
        }

        /* KWL Strategy Section */
        .kwl-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0f172a 100%);
            position: relative;
            overflow: hidden;
        }

        .kwl-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
        }

        .kwl-section .section-header {
            position: relative;
            z-index: 1;
        }

        .kwl-section .section-badge {
            background: rgba(212, 175, 55, 0.2);
            color: var(--gold);
            border: 1px solid var(--gold);
        }

        .kwl-section .section-title {
            color: white;
        }

        .kwl-section .section-title span {
            color: var(--gold);
        }

        .kwl-section .section-desc {
            color: rgba(255,255,255,0.8);
        }

        .kwl-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            position: relative;
            z-index: 1;
        }

        .kwl-card {
            background: white;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            transition: var(--transition);
        }

        .kwl-card:hover {
            transform: translateY(-10px);
        }

        .kwl-card-header {
            padding: 30px;
            text-align: center;
            color: white;
        }

        .kwl-card-letter {
            font-size: 4rem;
            font-weight: 900;
            margin-bottom: 10px;
        }

        .kwl-card-title {
            font-size: 1.3rem;
            font-weight: 700;
        }

        .kwl-card-body {
            padding: 30px;
        }

        .kwl-card-desc {
            color: var(--gray);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .kwl-features {
            list-style: none;
        }

        .kwl-features li {
            padding: 12px 0;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid var(--gray-light);
            font-size: 0.95rem;
        }

        .kwl-features li:last-child {
            border-bottom: none;
        }

        .kwl-features li .icon {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        /* Skills Section */
        .skills-section {
            background: var(--gray-light);
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .skill-card {
            background: white;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            cursor: pointer;
        }

        .skill-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-lg);
        }

        .skill-card-image {
            height: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 6rem;
            position: relative;
            overflow: hidden;
        }

        .skill-card-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: inherit;
            opacity: 0.1;
        }

        .skill-card-body {
            padding: 30px;
        }

        .skill-card-category {
            display: inline-block;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .skill-card-title {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .skill-card-title-jp {
            font-size: 1rem;
            color: var(--gray);
            font-weight: 600;
        }

        .skill-card-desc {
            color: var(--gray);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .skill-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            border-top: 1px solid var(--gray-light);
        }

        .skill-difficulty {
            display: flex;
            gap: 5px;
        }

        .skill-difficulty span {
            width: 25px;
            height: 8px;
            border-radius: 4px;
            background: var(--gray-light);
        }

        .skill-difficulty span.active {
            background: var(--primary);
        }

        .skill-card-btn {
            padding: 10px 25px;
            background: var(--gray-light);
            border: none;
            border-radius: 25px;
            font-family: 'Cairo', sans-serif;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .skill-card-btn:hover {
            background: var(--primary);
            color: white;
        }

        /* Features Section */
        .features-section {
            background: white;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .feature-card {
            background: var(--gray-light);
            border-radius: var(--radius);
            padding: 40px 30px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--gold));
            transform: scaleX(0);
            transition: var(--transition);
        }

        .feature-card:hover {
            background: white;
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }

        .feature-card:hover::before {
            transform: scaleX(1);
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 25px;
            border-radius: 25px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.1);
        }

        .feature-title {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .feature-desc {
            color: var(--gray);
            font-size: 0.95rem;
        }

        /* Skill Detail Page Styles */
        .skill-page {
            display: none;
            min-height: 100vh;
            padding-top: 100px;
        }

        .skill-page.active {
            display: block;
        }

        .skill-hero {
            padding: 60px 20px;
            text-align: center;
            position: relative;
        }

        .skill-hero-icon {
            font-size: 8rem;
            margin-bottom: 20px;
        }

        .skill-hero-title {
            font-size: 3rem;
            font-weight: 900;
            color: white;
            margin-bottom: 10px;
        }

        .skill-hero-subtitle {
            font-size: 1.5rem;
            color: rgba(255,255,255,0.8);
            margin-bottom: 20px;
        }

        .skill-hero-desc {
            max-width: 600px;
            margin: 0 auto;
            color: rgba(255,255,255,0.9);
            font-size: 1.1rem;
        }

        .back-btn {
            position: absolute;
            top: 20px;
            right: 20px;
            padding: 12px 25px;
            background: rgba(255,255,255,0.2);
            border: 1px solid rgba(255,255,255,0.3);
            border-radius: 30px;
            color: white;
            font-family: 'Cairo', sans-serif;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .back-btn:hover {
            background: white;
            color: var(--dark);
        }

        /* KWL Interactive Section */
        .kwl-interactive {
            background: white;
            padding: 60px 20px;
        }

        .kwl-interactive-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .kwl-tabs {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .kwl-tab {
            padding: 15px 40px;
            border: none;
            border-radius: 50px;
            font-family: 'Cairo', sans-serif;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .kwl-tab.k-tab {
            background: #dbeafe;
            color: #2563eb;
        }

        .kwl-tab.w-tab {
            background: #ede9fe;
            color: #7c3aed;
        }

        .kwl-tab.l-tab {
            background: #d1fae5;
            color: #059669;
        }

        .kwl-tab.active {
            transform: scale(1.05);
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
        }

        .kwl-tab.k-tab.active {
            background: #2563eb;
            color: white;
        }

        .kwl-tab.w-tab.active {
            background: #7c3aed;
            color: white;
        }

        .kwl-tab.l-tab.active {
            background: #059669;
            color: white;
        }

        .kwl-content {
            display: none;
            animation: fadeInUp 0.5s ease;
        }

        .kwl-content.active {
            display: block;
        }

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

        .kwl-panel {
            background: var(--gray-light);
            border-radius: var(--radius);
            padding: 40px;
        }

        .kwl-panel-header {
            text-align: center;
            margin-bottom: 30px;
        }

        .kwl-panel-icon {
            font-size: 4rem;
            margin-bottom: 15px;
        }

        .kwl-panel-title {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .kwl-panel-desc {
            color: var(--gray);
        }

        .kwl-form {
            max-width: 800px;
            margin: 0 auto;
        }

        .kwl-question {
            background: white;
            border-radius: var(--radius-sm);
            padding: 25px;
            margin-bottom: 20px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .kwl-question-title {
            font-weight: 700;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .kwl-question-title .num {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: white;
        }

        .kwl-textarea {
            width: 100%;
            min-height: 100px;
            padding: 15px;
            border: 2px solid var(--gray-light);
            border-radius: var(--radius-sm);
            font-family: 'Cairo', sans-serif;
            font-size: 1rem;
            resize: vertical;
            transition: var(--transition);
        }

        .kwl-textarea:focus {
            outline: none;
            border-color: var(--primary);
        }

        .kwl-options {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .kwl-option {
            padding: 15px 20px;
            background: var(--gray-light);
            border: 2px solid transparent;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .kwl-option:hover {
            border-color: var(--primary);
        }

        .kwl-option.selected {
            background: var(--primary-light);
            border-color: var(--primary);
        }

        .kwl-option-check {
            width: 24px;
            height: 24px;
            border: 2px solid var(--gray);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .kwl-option.selected .kwl-option-check {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
        }

        .kwl-submit {
            display: block;
            width: 100%;
            max-width: 300px;
            margin: 30px auto 0;
            padding: 15px 40px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            border: none;
            border-radius: 50px;
            font-family: 'Cairo', sans-serif;
            font-weight: 700;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 10px 30px rgba(220, 38, 38, 0.3);
        }

        .kwl-submit:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(220, 38, 38, 0.4);
        }

        /* Video Section */
        .video-section {
            background: var(--gray-light);
            padding: 60px 20px;
        }

        .video-container {
            max-width: 1000px;
            margin: 0 auto;
        }

        .video-player {
            background: var(--dark);
            border-radius: var(--radius);
            overflow: hidden;
            aspect-ratio: 16/9;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .video-placeholder {
            text-align: center;
            color: white;
        }

        .video-placeholder-icon {
            font-size: 5rem;
            margin-bottom: 20px;
            opacity: 0.5;
        }

        .play-btn {
            width: 100px;
            height: 100px;
            background: var(--primary);
            border: none;
            border-radius: 50%;
            color: white;
            font-size: 2.5rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .play-btn:hover {
            transform: scale(1.1);
            box-shadow: 0 0 50px rgba(220, 38, 38, 0.5);
        }

        .video-info {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .video-info-item {
            background: white;
            padding: 25px;
            border-radius: var(--radius-sm);
            text-align: center;
        }

        .video-info-icon {
            font-size: 2rem;
            margin-bottom: 10px;
        }

        .video-info-label {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 5px;
        }

        .video-info-value {
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--dark);
        }

        /* Steps Section */
        .steps-section {
            background: white;
            padding: 60px 20px;
        }

        .steps-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            gap: 30px;
            margin-bottom: 40px;
            position: relative;
        }

        .step-item:not(:last-child)::before {
            content: '';
            position: absolute;
            right: 29px;
            top: 60px;
            width: 2px;
            height: calc(100% + 40px);
            background: linear-gradient(to bottom, var(--primary), var(--gold));
        }

        .step-number {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 900;
            font-size: 1.5rem;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
        }

        .step-content {
            flex: 1;
            background: var(--gray-light);
            padding: 25px 30px;
            border-radius: var(--radius-sm);
        }

        .step-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .step-desc {
            color: var(--gray);
        }

        /* Progress Section */
        .progress-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0f172a 100%);
            padding: 60px 20px;
        }

        .progress-container {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .progress-title {
            color: white;
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 30px;
        }

        .progress-bar-container {
            background: rgba(255,255,255,0.1);
            border-radius: 20px;
            padding: 5px;
            margin-bottom: 20px;
        }

        .progress-bar {
            height: 30px;
            background: linear-gradient(90deg, var(--primary), var(--gold));
            border-radius: 15px;
            width: 0%;
            transition: width 1s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
        }

        .progress-steps {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
        }

        .progress-step {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
        }

        .progress-step.completed {
            color: var(--gold);
        }

        .progress-step.current {
            color: white;
            font-weight: 700;
        }

        /* Footer */
        .footer {
            background: var(--dark);
            color: white;
            padding: 60px 20px 30px;
        }

        .footer-container {
            max-width: 1400px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 50px;
            margin-bottom: 50px;
        }

        .footer-brand .logo {
            margin-bottom: 20px;
        }

        .footer-brand .logo-text {
            color: white;
        }

        .footer-desc {
            color: rgba(255,255,255,0.7);
            margin-bottom: 25px;
            font-size: 0.95rem;
        }

        .footer-social {
            display: flex;
            gap: 15px;
        }

        .social-link {
            width: 45px;
            height: 45px;
            background: rgba(255,255,255,0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .social-link:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }

        .footer-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 25px;
            color: white;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.95rem;
        }

        .footer-links a:hover {
            color: var(--gold);
            padding-right: 5px;
        }

        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
        }

        .footer-copyright {
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            margin-bottom: 10px;
        }

        .footer-researcher {
            color: var(--gold);
            font-weight: 700;
            font-size: 1.1rem;
        }

        /* Responsive Design */
        @media (max-width: 1200px) {
            .hero-container {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .hero-content {
                order: 2;
            }

            .hero-visual {
                order: 1;
            }

            .hero-title {
                font-size: 2.8rem;
            }

            .hero-desc {
                margin: 0 auto 35px;
            }

            .hero-buttons {
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 992px) {
            .stats-container {
                grid-template-columns: repeat(2, 1fr);
            }

            .kwl-cards {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }

            .skills-grid {
                grid-template-columns: 1fr;
            }

            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }

            .hero-karate-icon {
                height: 300px;
                font-size: 10rem;
            }

            .floating-cards {
                display: none;
            }

            .stats-container {
                grid-template-columns: 1fr;
            }

            .section-title {
                font-size: 2rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .kwl-tabs {
                flex-direction: column;
            }

            .kwl-options {
                grid-template-columns: 1fr;
            }

            .video-info {
                grid-template-columns: 1fr;
            }

            .step-item {
                flex-direction: column;
                gap: 15px;
            }

            .step-item::before {
                display: none;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .footer-social {
                justify-content: center;
            }
        }

        /* Page Sections */
        .main-page, .skill-detail-page {
            display: none;
        }

        .main-page.active, .skill-detail-page.active {
            display: block;
        }

        /* Scroll to top */
        .scroll-top {
            position: fixed;
            bottom: 30px;
            left: 30px;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            border: none;
            border-radius: 50%;
            font-size: 1.5rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 5px 20px rgba(220, 38, 38, 0.4);
            z-index: 999;
        }

        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .scroll-top:hover {
            transform: translateY(-5px);
        }

        /* Animation Classes */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Toast Notifications */
        .toast-container {
            position: fixed;
            top: 100px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 9999;
        }

        .toast {
            background: white;
            padding: 20px 30px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
            animation: slideIn 0.3s ease;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .toast-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        .toast-success .toast-icon {
            background: var(--success-light);
            color: var(--success);
        }

        .toast-info .toast-icon {
            background: var(--info-light);
            color: var(--info);
        }

        .toast-message {
            font-weight: 600;
        }