/* Material Design 3 inspirierte Farbpalette */
:root {
            --md-primary: #1976d2;
            --md-primary-variant: #1565c0;
            --md-secondary: #03dac6;
            --md-tertiary: #ff6f00;
            --md-background: #0a0a0a;
            --md-surface: #1a1a1a;
            --md-surface-variant: #2a2a2a;
            --md-on-primary: #ffffff;
            --md-on-background: #e8e8e8;
            --md-on-surface: #e8e8e8;
            --md-outline: #666666;
            --md-shadow: rgba(0, 0, 0, 0.3);
            --md-elevation-1: 0 2px 8px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.2);
            --md-elevation-2: 0 4px 12px rgba(0, 0, 0, 0.2), 0 2px 4px rgba(0, 0, 0, 0.15);
            --md-elevation-3: 0 8px 20px rgba(0, 0, 0, 0.25), 0 3px 6px rgba(0, 0, 0, 0.15);
            --md-elevation-4: 0 12px 28px rgba(0, 0, 0, 0.3), 0 5px 10px rgba(0, 0, 0, 0.2);
            --python-blue: #3776ab;
            --algorithm-green: #0d7377;
        }

        
* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
            color: var(--md-on-background);
            background: var(--md-background);
            font-weight: 400;

           -webkit-user-select: none; /* Chrome, Safari */
           -moz-user-select: none;    /* Firefox */
           -ms-user-select: none;     /* IE/Edge */
           user-select: none;         /* Стандарт */
        }
        
.container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        /* Animated Header */
.header {
            background: linear-gradient(135deg, var(--md-surface) 0%, var(--md-surface-variant) 100%);
            box-shadow: var(--md-elevation-3);
            padding: 16px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--md-outline);
        }
        
.header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
.logo {
            font-size: 26px;
            font-weight: 800;
            color: var(--md-primary);
            display: flex;
            align-items: center;
            gap: 12px;
            text-shadow: 0 2px 4px rgba(25, 118, 210, 0.3);
        }
        
        .tech-logos {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .tech-logo {
            width: 32px;
            height: 32px;
            border-radius: 6px;
            transition: all 0.3s ease;
            filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
        }
        
        .tech-logo:hover {
            transform: scale(1.15) rotate(5deg);
        }
        
        .nav-link {
            color: var(--md-on-surface);
            text-decoration: none;
            margin-left: 28px;
            font-weight: 600;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .nav-link:hover {
            color: var(--md-primary);
            transform: translateY(-2px);
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -4px;
            left: 50%;
            background: var(--md-primary);
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }
        
        .nav-link:hover::after {
            width: 100%;
        }
        
        /* Dynamic Hero Section */
        .hero {
            padding: 35px 0;
            background: linear-gradient(135deg, var(--md-background) 0%, var(--md-surface) 50%, var(--md-surface-variant) 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: 
                radial-gradient(circle at 20% 50%, rgba(25, 118, 210, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 111, 0, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 80%, rgba(3, 218, 198, 0.1) 0%, transparent 50%);
            animation: float 6s ease-in-out infinite;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-10px) rotate(1deg); }
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            gap: 60px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        
        .hero-text {
            flex: 1;
            min-width: 300px;
        }
        
        .hero h1 {
            font-size: 4rem;
            font-weight: 900;
            margin-bottom: 28px;
            color: var(--md-on-surface);
            line-height: 1.05;
            background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-tertiary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        }
        
        .hero-subtitle {
            font-size: 1.35rem;
            color: var(--md-outline);
            margin-bottom: 36px;
            line-height: 1.5;
            font-weight: 500;
        }
        
        .cta-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-variant) 100%);
            color: var(--md-on-primary);
            padding: 20px 36px;
            border-radius: 32px;
            text-decoration: none;
            font-weight: 700;
            font-size: 18px;
            transition: all 0.3s ease;
            box-shadow: var(--md-elevation-3);
            min-height: 60px;
            position: relative;
            overflow: hidden;
        }
        
        .cta-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: all 0.6s ease;
        }
        
        .cta-button:hover::before {
            left: 100%;
        }
        
        .cta-button:hover {
            transform: translateY(-4px) scale(1.05);
            box-shadow: var(--md-elevation-4);
        }
        
        .hero-visual {
            display: flex;
            flex-direction: column;
            gap: 20px;
            align-items: center;
        }
        
        .hero-visual img {
            max-width: 200px;
            height: auto;
            filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
            transition: all 0.4s ease;
        }
        
        .hero-visual img:hover {
            transform: scale(1.1) rotateY(15deg);
            filter: drop-shadow(0 8px 20px rgba(0, 0, 0, 0.4));
        }
        
        /* Enhanced Features Section */
        .features {
            padding: 100px 0;
            background: var(--md-background);
        }
        
        .section-title {
            text-align: center;
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 60px;
            color: var(--md-on-background);
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--md-primary), var(--md-secondary));
            border-radius: 2px;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
        }
        
        .feature-card {
            background: var(--md-surface);
            border-radius: 20px;
            padding: 40px;
            transition: all 0.4s ease;
            box-shadow: var(--md-elevation-2);
            border: 1px solid var(--md-outline);
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--md-primary), var(--md-secondary), var(--md-tertiary));
            transform: translateX(-100%);
            transition: transform 0.6s ease;
        }
        
        .feature-card:hover::before {
            transform: translateX(0);
        }
        
        .feature-card:hover {
            transform: translateY(-8px) scale(1.02);
            box-shadow: var(--md-elevation-4);
        }
        
        .feature-icon {
            width: 56px;
            height: 56px;
            margin-bottom: 20px;
            filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
        }
        
        .feature-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--md-on-surface);
        }
        
        .feature-description {
            color: var(--md-outline);
            line-height: 1.6;
            font-size: 16px;
        }
        
        /* Enhanced Curriculum Section */
        .curriculum {
            padding: 0px 0;
            background: linear-gradient(135deg, var(--md-surface-variant) 0%, var(--md-surface) 100%);
        }
        
        .module {
            background: var(--md-surface);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 32px;
            box-shadow: var(--md-elevation-2);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .module::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 6px;
            height: 100%;
            background: linear-gradient(180deg, var(--md-primary), var(--md-secondary));
        }
        
        .module:hover {
            box-shadow: var(--md-elevation-3);
            transform: translateX(4px);
        }
        
        .module-title {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 28px;
            font-weight: 700;
            color: var(--md-on-surface);
            margin-bottom: 24px;
        }
        
        .module-number {
            background: linear-gradient(135deg, var(--md-primary), var(--md-primary-variant));
            color: var(--md-on-primary);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            box-shadow: var(--md-elevation-2);
        }
        
        .lessons-list {
            list-style: none;
            display: grid;
            gap: 12px;
        }
        
        .lesson-item {
            background: var(--md-surface-variant);
            padding: 16px 20px;
            border-radius: 12px;
            border-left: 4px solid var(--md-primary);
            transition: all 0.3s ease;
            position: relative;
        }
        
        .lesson-item:hover {
            background: var(--md-outline);
            transform: translateX(8px);
            border-left-color: var(--md-secondary);
            box-shadow: var(--md-elevation-1);
        }
        
        .lesson-number {
            color: var(--md-primary);
            font-weight: 700;
            margin-right: 12px;
            font-size: 16px;
        }
        
        .lesson-item:hover .lesson-number {
            color: var(--md-secondary);
        }
        
        /* Contact Section */
        .contact {
            padding: 100px 0;
            background: var(--md-surface);
            text-align: center;
            position: relative;
        }
        
        .contact::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: 
                radial-gradient(circle at 30% 20%, rgba(25, 118, 210, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(3, 218, 198, 0.05) 0%, transparent 50%);
        }
        
        .contact-content {
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        
        .contact-info {
            background: var(--md-surface-variant);
            border-radius: 20px;
            padding: 40px;
            margin-top: 40px;
            box-shadow: var(--md-elevation-2);
            border: 1px solid var(--md-outline);
        }
        
        .contact-info h3 {
            color: var(--md-on-surface);
            margin-bottom: 20px;
            font-size: 24px;
            font-weight: 700;
        }
        
        .contact-info p {
            margin-bottom: 16px;
            color: var(--md-outline);
            font-size: 16px;
        }
        
        /* Footer */
        .footer {
            background: linear-gradient(135deg, var(--md-surface-variant) 0%, var(--md-background) 100%);
            padding: 40px 0;
            text-align: center;
            color: var(--md-outline);
            border-top: 1px solid var(--md-outline);
        }
        
        /* Responsive Design */
        @media (max-width: 768px) {
            .hero h1 { font-size: 2.8rem; }
            .section-title { font-size: 2.2rem; }
            .features-grid { grid-template-columns: 1fr; gap: 24px; }
            .hero-content { gap: 32px; }
            .logo { font-size: 22px; }
            .tech-logo { width: 28px; height: 28px; }
            .container { padding: 0 16px; }
            .module-title { font-size: 24px; }
        }
        
        @media (max-width: 480px) {
            .hero { padding: 60px 0; }
            .features, .curriculum, .contact { padding: 60px 0; }
            .hero h1 { font-size: 2.2rem; }
            .section-title { font-size: 1.8rem; }
        }