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

        body {
            font-family: 'Arial', sans-serif;
            overflow-x: hidden;
        }

        /* Header Styles */
        .header {
            background: #4fb3b3;
            padding: 1rem 0;
            position: relative;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2rem;
        }

        .logo {
            display: flex;
            align-items: center;
            color: white;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1rem;
            letter-spacing: 1px;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: opacity 0.3s ease;
            padding: 0.5rem 0;
        }

        .nav-links a:hover,
        .nav-links a.active {
            opacity: 0.8;
            text-decoration: underline;
        }

        .start-btn {
            background: #ff8c42;
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 25px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            text-decoration: none;
            display: inline-block;
        }

        .start-btn:hover {
            background: #ff7a2b;
            transform: translateY(-2px);
        }

        .hero {
            min-height: 100vh;
            background: linear-gradient(135deg, #0891b2 0%, #0e7490 50%, #155e75 100%);
            position: relative;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background-image: url('https://images.unsplash.com/photo-1498050108023-c5249f4df085?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            mask: linear-gradient(90deg, transparent 0%, rgba(0,0,0,0.3) 30%, rgba(0,0,0,0.8) 100%);
            -webkit-mask: linear-gradient(90deg, transparent 0%, rgba(0,0,0,0.3) 30%, rgba(0,0,0,0.8) 100%);
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -50px;
            right: -50px;
            width: 600px;
            height: 400px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50% 0% 50% 50%;
            transform: rotate(-15deg);
        }

        .floating-elements {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            pointer-events: none;
        }

        .floating-circle {
            position: absolute;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            animation: float 15s infinite ease-in-out;
        }

        .floating-circle:nth-child(1) {
            width: 80px;
            height: 80px;
            top: 20%;
            right: 15%;
            animation-delay: 0s;
        }

        .floating-circle:nth-child(2) {
            width: 120px;
            height: 120px;
            top: 60%;
            right: 10%;
            animation-delay: -5s;
        }

        .floating-circle:nth-child(3) {
            width: 60px;
            height: 60px;
            top: 40%;
            right: 25%;
            animation-delay: -10s;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px) translateX(0px); opacity: 0.1; }
            25% { transform: translateY(-20px) translateX(10px); opacity: 0.2; }
            50% { transform: translateY(-40px) translateX(-10px); opacity: 0.15; }
            75% { transform: translateY(-20px) translateX(5px); opacity: 0.1; }
        }

        .hero-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            position: relative;
            z-index: 10;
            margin-top: 80px;
        }

        .hero-content {
            max-width: 600px;
            animation: slideInLeft 1s ease-out;
        }

        @keyframes slideInLeft {
            0% {
                opacity: 0;
                transform: translateX(-50px);
            }
            100% {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .hero h1 {
           
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 1.5rem;
            line-height: 1.1;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .hero-subtitle {
            font-size: clamp(1.2rem, 3vw, 1.5rem);
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 3rem;
            line-height: 1.6;
            max-width: 500px;
            animation: slideInLeft 1s ease-out 0.3s both;
        }

        .start-course-btn {
            background: linear-gradient(135deg, #f59e0b, #f97316);
            color: white;
            border: none;
            padding: 1.2rem 3rem;
            font-size: 1.1rem;
            font-weight: 700;
            border-radius: 50px;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
            box-shadow: 0 10px 30px rgba(245, 158, 11, 0.3);
            animation: slideInLeft 1s ease-out 0.6s both;
        }

        .start-course-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            transition: left 0.5s ease;
        }

        .start-course-btn:hover::before {
            left: 100%;
        }

        .start-course-btn:hover {
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 15px 40px rgba(245, 158, 11, 0.4);
        }

        .tech-pattern {
            position: absolute;
            bottom: 100px;
            right: 100px;
            width: 300px;
            height: 200px;
            opacity: 0.1;
            background-image: 
                repeating-linear-gradient(
                    45deg,
                    rgba(255,255,255,0.1) 0px,
                    rgba(255,255,255,0.1) 2px,
                    transparent 2px,
                    transparent 12px
                );
            animation: techGlow 3s ease-in-out infinite alternate;
        }

        @keyframes techGlow {
            0% { opacity: 0.05; }
            100% { opacity: 0.15; }
        }

        /* Mobile Menu */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            cursor: pointer;
        }

        .mobile-menu-btn span {
            width: 25px;
            height: 3px;
            background: #2d3748;
            margin: 3px 0;
            transition: 0.3s;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .header {
                padding: 1rem;
            }

            .nav-container {
                padding: 0 1rem;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #4fb3b3;
                flex-direction: column;
                padding: 1rem;
                box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            }

            .nav-links.active {
                display: flex;
            }

            .nav-links li {
                margin: 0.5rem 0;
            }

            .mobile-menu-btn {
                display: flex;
            }

            .hero-container {
                padding: 0 1rem;
                text-align: center;
                margin-top: 60px;
            }

            .hero-content {
                max-width: 100%;
            }

            .start-course-btn {
                padding: 1rem 2rem;
                font-size: 1rem;
            }

            .tech-pattern {
                display: none;
            }

            .start-btn {
                padding: 0.6rem 1rem;
                font-size: 0.9rem;
            }
        }