:root {
        --primary-color: #0f172a;
        --secondary-color: #3b82f6;
        --accent-color: #06b6d4;
        --success-color: #10b981;
        --warning-color: #f59e0b;
        --danger-color: #ef4444;
        --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
        --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
        --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
        --text-dark: #1e293b;
        --text-light: #64748b;
        --text-muted: #94a3b8;
        --bg-light: #f8fafc;
        --bg-white: #ffffff;
        --border-color: #e2e8f0;
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        --border-radius-sm: 8px;
        --border-radius-md: 12px;
        --border-radius-lg: 16px;
        --border-radius-xl: 24px;
    }

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

    body {
        font-family: 'Poppins', sans-serif;
        line-height: 1.7;
        color: var(--text-dark);
        font-weight: 400;
        letter-spacing: 0.01em;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        font-family: 'Space Grotesk', sans-serif;
        font-weight: 700;
        line-height: 1.2;
        letter-spacing: -0.025em;
    }

    h1 {
        font-size: clamp(2.5rem, 6vw, 4rem);
        font-weight: 800;
    }

    h2 {
        font-size: clamp(2rem, 4vw, 3rem);
        font-weight: 700;
    }

    h3 {
        font-size: clamp(1.5rem, 3vw, 2rem);
        font-weight: 600;
    }

    h4 {
        font-size: clamp(1.25rem, 2.5vw, 1.5rem);
        font-weight: 600;
    }

    h5 {
        font-size: clamp(1.1rem, 2vw, 1.25rem);
        font-weight: 600;
    }

    .lead {
        font-size: clamp(1.1rem, 2.5vw, 1.3rem);
        font-weight: 400;
        line-height: 1.6;
        color: var(--text-light);
    }

    /* Smooth Scrolling */
    html {
        scroll-behavior: smooth;
    }

    /* Navigation */
    .navbar {
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(20px);
        padding: 1rem 0;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .navbar.scrolled {
        background: rgba(15, 23, 42, 0.98);
        padding: 0.7rem 0;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    }

    .navbar-brand {
        font-size: 1.8rem;
        font-weight: 800;
        color: #fff !important;
        display: flex;
        align-items: center;
        font-family: 'Space Grotesk', sans-serif;
    }

    .navbar-brand i {
        margin-right: 12px;
        color: var(--accent-color);
        font-size: 2rem;
    }

    .nav-link {
        color: rgba(255, 255, 255, 0.9) !important;
        font-weight: 500;
        margin: 0 8px;
        padding: 8px 16px !important;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
        border-radius: var(--border-radius-md);
    }

    .nav-link:hover {
        color: var(--accent-color) !important;
        background: rgba(6, 182, 212, 0.1);
    }

    .nav-link.btn {
        background: var(--gradient-1);
        color: white !important;
        border-radius: var(--border-radius-xl);
        padding: 10px 20px !important;
        margin-left: 12px;
    }

    .nav-link.btn:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-lg);
    }

    /* Hero Banner */
    .hero-banner {
        background: var(--gradient-hero);
        min-height: 100vh;
        display: flex;
        align-items: center;
        color: #fff;
        position: relative;
        overflow: hidden;
        padding: 120px 0 80px;
    }

    .hero-banner::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at 20% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
            radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
        pointer-events: none;
    }

    .hero-content {
        position: relative;
        z-index: 2;
    }

    .hero-banner h1 {
        font-weight: 800;
        margin-bottom: 1.5rem;
        background: linear-gradient(135deg, #ffffff 0%, #06b6d4 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .hero-banner .lead {
        font-size: clamp(1.2rem, 3vw, 1.4rem);
        margin-bottom: 1.5rem;
        opacity: 0.95;
        font-weight: 500;
        color: rgba(255, 255, 255, 0.9);
    }

    .hero-banner p {
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.8);
        margin-bottom: 2.5rem;
        line-height: 1.7;
    }

    .cta-buttons {
        display: flex;
        gap: 1rem;
        flex-wrap: wrap;
        margin-top: 2rem;
    }

    .btn-primary-custom {
        background: var(--gradient-1);
        border: none;
        padding: 16px 32px;
        font-weight: 600;
        border-radius: var(--border-radius-xl);
        color: white;
        text-decoration: none;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
        font-size: 1.05rem;
        display: inline-flex;
        align-items: center;
        cursor: pointer;
    }

    .btn-primary-custom:hover {
        transform: translateY(-3px);
        box-shadow: 0 20px 40px rgba(102, 126, 234, 0.4);
        color: white;
    }

    .btn-outline-custom {
        border: 2px solid rgba(255, 255, 255, 0.3);
        color: white;
        padding: 14px 30px;
        font-weight: 600;
        border-radius: var(--border-radius-xl);
        text-decoration: none;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        background: rgba(255, 255, 255, 0.05);
        backdrop-filter: blur(10px);
        font-size: 1.05rem;
        display: inline-flex;
        align-items: center;
        cursor: pointer;
    }

    .btn-outline-custom:hover {
        background: rgba(255, 255, 255, 0.15);
        color: white;
        transform: translateY(-3px);
        box-shadow: var(--shadow-lg);
    }

    /* Hero Contact Form */
    .hero-contact-form {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        border-radius: var(--border-radius-xl);
        padding: 2.5rem;
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        border: 1px solid rgba(255, 255, 255, 0.2);
        position: relative;
        overflow: hidden;
    }

    .hero-contact-form::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: var(--gradient-1);
    }

    .hero-contact-form h3 {
        color: var(--text-dark);
        margin-bottom: 1.5rem;
        font-size: 1.5rem;
        text-align: center;
    }

    /* Floating Animation */
    .floating {
        animation: floating 6s ease-in-out infinite;
    }

    @keyframes floating {

        0%,
        100% {
            transform: translateY(0px) rotate(0deg);
        }

        33% {
            transform: translateY(-15px) rotate(1deg);
        }

        66% {
            transform: translateY(-5px) rotate(-1deg);
        }
    }

    /* Form Styles */
    .form-control {
        border: 2px solid var(--border-color);
        border-radius: var(--border-radius-md);
        padding: 14px 16px;
        margin-bottom: 1rem;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        font-size: 0.95rem;
        font-weight: 500;
        background: var(--bg-white);
    }

    .form-control:focus {
        border-color: var(--secondary-color);
        box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
        background: white;
        outline: none;
    }

    .form-control::placeholder {
        color: var(--text-muted);
        font-weight: 400;
    }

    /* Modal Styles */
    .modal-content {
        border-radius: var(--border-radius-xl);
        border: none;
        overflow: hidden;
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
    }

    .modal-header {
        background: var(--gradient-1);
        color: white;
        border: none;
        padding: 1.5rem 2rem;
    }

    .modal-title {
        font-size: 1.5rem;
        font-weight: 700;
    }

    .modal-body {
        padding: 2rem;
    }

    .btn-close {
        filter: brightness(0) invert(1);
        opacity: 0.8;
    }

    .btn-close:hover {
        opacity: 1;
    }

    /* Section Styles */
    .section-title {
        font-size: clamp(2rem, 5vw, 3rem);
        font-weight: 800;
        text-align: center;
        margin-bottom: 1rem;
        color: var(--text-dark);
        position: relative;
    }

    .section-subtitle {
        text-align: center;
        font-size: 1.15rem;
        color: var(--text-light);
        margin-bottom: 4rem;
        max-width: 700px;
        margin-left: auto;
        margin-right: auto;
        font-weight: 400;
        line-height: 1.6;
    }

    /* Course Cards */
    .course-card,
    .service-card {
        background: var(--bg-white);
        border-radius: var(--border-radius-xl);
        padding: 2.5rem;
        box-shadow: var(--shadow-md);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border: 1px solid var(--border-color);
        height: 100%;
        position: relative;
        overflow: hidden;
    }

    .course-card::before,
    .service-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: var(--gradient-1);
        transform: scaleX(0);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .course-card:hover::before,
    .service-card:hover::before {
        transform: scaleX(1);
    }

    .course-card:hover,
    .service-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-xl);
        border-color: rgba(59, 130, 246, 0.2);
    }

    .card-icon {
        width: 80px;
        height: 80px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 1.5rem;
        font-size: 2rem;
        color: white;
        position: relative;
        overflow: hidden;
    }

    .course-card:nth-child(6n+1) .card-icon {
        background: var(--gradient-1);
    }

    .course-card:nth-child(6n+2) .card-icon {
        background: var(--gradient-2);
    }

    .course-card:nth-child(6n+3) .card-icon {
        background: var(--gradient-3);
    }

    .course-card:nth-child(6n+4) .card-icon {
        background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    }

    .course-card:nth-child(6n+5) .card-icon {
        background: linear-gradient(135deg, #0abde3 0%, #006ba6 100%);
    }

    .course-card:nth-child(6n+6) .card-icon {
        background: linear-gradient(135deg, #feca57 0%, #ff9ff3 100%);
    }

    .service-card:nth-child(6n+1) .card-icon {
        background: var(--gradient-3);
    }

    .service-card:nth-child(6n+2) .card-icon {
        background: var(--gradient-1);
    }

    .service-card:nth-child(6n+3) .card-icon {
        background: var(--gradient-2);
    }

    .service-card:nth-child(6n+4) .card-icon {
        background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    }

    .service-card:nth-child(6n+5) .card-icon {
        background: linear-gradient(135deg, #0abde3 0%, #006ba6 100%);
    }

    .service-card:nth-child(6n+6) .card-icon {
        background: linear-gradient(135deg, #feca57 0%, #ff9ff3 100%);
    }

    .card-title {
        font-size: 1.4rem;
        font-weight: 700;
        margin-bottom: 1rem;
        text-align: center;
        color: var(--text-dark);
    }

    .card-text {
        color: var(--text-light);
        text-align: center;
        margin-bottom: 1.5rem;
        line-height: 1.6;
        font-size: 0.95rem;
    }

    /* Stats Section */
    .stats-section {
        background: var(--gradient-1);
        color: white;
        padding: 5rem 0;
        position: relative;
        overflow: hidden;
    }

    .stats-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
        pointer-events: none;
    }

    .stat-item {
        text-align: center;
        margin-bottom: 2rem;
        position: relative;
    }

    .stat-number {
        font-size: clamp(2.5rem, 5vw, 4rem);
        font-weight: 800;
        display: block;
        font-family: 'Space Grotesk', sans-serif;
    }

    .stat-label {
        font-size: 1.15rem;
        opacity: 0.95;
        font-weight: 500;
        margin-top: 0.5rem;
    }

    /* About Section */
    .about-section {
        padding: 6rem 0;
        background: var(--bg-light);
    }

    .about-image {
        border-radius: var(--border-radius-xl);
        box-shadow: var(--shadow-xl);
    }

    /* Testimonials */
    .testimonial-card {
        background: var(--bg-white);
        border-radius: var(--border-radius-xl);
        padding: 2.5rem;
        box-shadow: var(--shadow-md);
        text-align: center;
        margin-bottom: 2rem;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        border: 1px solid var(--border-color);
    }

    .testimonial-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-xl);
    }

    .testimonial-avatar {
        width: 80px;
        height: 80px;
        border-radius: 50%;
        margin: 0 auto 1.5rem;
        object-fit: cover;
        border: 4px solid white;
        box-shadow: var(--shadow-lg);
    }

    /* CTA Sections */
    .cta-section {
        background: var(--gradient-2);
        color: white;
        padding: 5rem 0;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
        pointer-events: none;
    }

    .cta-section h2 {
        font-size: clamp(2rem, 4vw, 3rem);
        font-weight: 800;
        margin-bottom: 1rem;
    }

    /* Contact Form */
    .contact-form {
        background: var(--bg-white);
        border-radius: var(--border-radius-xl);
        padding: 3rem;
        box-shadow: var(--shadow-xl);
        border: 1px solid var(--border-color);
    }

    /* Footer */
    .footer {
        background: var(--primary-color);
        color: white;
        padding: 4rem 0 2rem;
    }

    .footer-links {
        list-style: none;
        padding: 0;
    }

    .footer-links li {
        margin-bottom: 0.8rem;
    }

    .footer-links a {
        color: var(--text-muted);
        text-decoration: none;
        transition: all 0.3s ease;
        font-weight: 400;
    }

    .footer-links a:hover {
        color: var(--accent-color);
    }

    .social-icons {
        display: flex;
        gap: 1rem;
        justify-content: center;
    }

    .social-icons a {
        width: 45px;
        height: 45px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        text-decoration: none;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        backdrop-filter: blur(10px);
    }

    .social-icons a:hover {
        background: var(--accent-color);
        transform: translateY(-3px);
        box-shadow: var(--shadow-lg);
    }

    /* Accordion Styles */
    .accordion-item {
        border: none;
        margin-bottom: 1rem;
        border-radius: var(--border-radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-md);
        transition: all 0.3s ease;
    }

    .accordion-item:hover {
        box-shadow: var(--shadow-lg);
    }

    .accordion-button {
        background: var(--bg-white);
        border: none;
        font-weight: 600;
        font-size: 1.1rem;
        color: var(--text-dark);
        padding: 1.5rem 2rem;
    }

    .accordion-button:not(.collapsed) {
        background: var(--gradient-1);
        color: white;
    }

    .accordion-body {
        padding: 1.5rem 2rem;
        color: var(--text-light);
        line-height: 1.7;
    }

    /* Alert Styles */
    .alert {
        border: none;
        border-radius: var(--border-radius-md);
        padding: 1rem 1.5rem;
        font-weight: 500;
    }

    .alert-success {
        background: rgba(16, 185, 129, 0.1);
        color: var(--success-color);
        border-left: 4px solid var(--success-color);
    }

    .alert-danger {
        background: rgba(239, 68, 68, 0.1);
        color: var(--danger-color);
        border-left: 4px solid var(--danger-color);
    }

    /* Loading Spinner */
    .spinner {
        width: 20px;
        height: 20px;
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        border-top-color: white;
        animation: spin 1s ease-in-out infinite;
    }

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

    /* Back to Top Button */
    #backToTop {
        position: fixed;
        bottom: 30px;
        right: 30px;
        z-index: 1000;
        border-radius: 50%;
        width: 55px;
        height: 55px;
        display: none;
        background: var(--gradient-1);
        border: none;
        box-shadow: var(--shadow-xl);
        color: white;
        font-size: 1.2rem;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    #backToTop:hover {
        transform: translateY(-3px);
        box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
    }

    /* Responsive Design */
    @media (max-width: 992px) {
        .hero-banner {
            text-align: center;
            padding: 100px 0 60px;
        }

        .hero-contact-form {
            margin-top: 3rem;
        }

        .cta-buttons {
            justify-content: center;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
        }

        .btn-primary-custom,
        .btn-outline-custom {
            width: 100%;
            max-width: 280px;
            justify-content: center;
        }
    }

    @media (max-width: 768px) {
        .navbar-nav {
            text-align: center;
            padding-top: 1rem;
        }

        .hero-banner {
            padding: 80px 0 40px;
        }

        .hero-contact-form {
            padding: 2rem;
        }

        .stats-section .row>div {
            margin-bottom: 2rem;
        }

        .contact-form {
            padding: 2rem;
        }

        .modal-body {
            padding: 1.5rem;
        }

        .course-card,
        .service-card {
            margin-bottom: 2rem;
            padding: 2rem;
        }

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

        .social-icons {
            justify-content: center;
            margin-top: 1.5rem;
        }
    }

    @media (max-width: 576px) {
        .hero-banner h1 {
            font-size: 2.2rem;
        }

        .hero-contact-form {
            padding: 1.5rem;
        }

        .course-card,
        .service-card {
            padding: 1.5rem;
        }

        .contact-form {
            padding: 1.5rem;
        }

        .cta-buttons {
            flex-direction: column;
            gap: 0.8rem;
        }

        .btn-primary-custom,
        .btn-outline-custom {
            width: 100%;
            text-align: center;
            justify-content: center;
        }
    }

    /* Custom Utilities */
    .text-gradient {
        background: var(--gradient-1);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .bg-glass {
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.2);
    }