:root {

            --primary-color: #4361ee;
            --primary-dark: #3a56d5;
            --secondary-color: #7209b7;
            --accent-color: #ff6b35;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --info-color: #17a2b8;


            --bg-primary: #ffffff;
            --bg-secondary: #f8f9fa;
            --bg-tertiary: #e9ecef;
            --bg-glass: rgba(255, 255, 255, 0.9);
            --bg-card: #ffffff;


            --text-primary: #1a1a2e;
            --text-secondary: #6c757d;
            --text-muted: #8e8e93;
            --text-inverse: #ffffff;


            --border-color: rgba(0, 0, 0, 0.1);
            --border-light: rgba(0, 0, 0, 0.05);


            --gradient-primary: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
            --gradient-secondary: linear-gradient(135deg, #7209b7 0%, #4cc9f0 100%);
            --gradient-accent: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
            --gradient-hero: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);


            --weld-orange: #ff8c42;
            --spark-yellow: #ffd700;
            --plasma-blue: #00d4ff;
            --steel-gray: #6c757d;


            --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);


            --animation-speed: 0.3s;
            --animation-curve: cubic-bezier(0.4, 0, 0.2, 1);
        }


        [data-theme="dark"] {

            --primary-color: #5b73ff;
            --primary-dark: #4361ee;
            --secondary-color: #9d4edd;
            --accent-color: #ff7849;


            --bg-primary: #0d1117;
            --bg-secondary: #161b22;
            --bg-tertiary: #21262d;
            --bg-glass: rgba(13, 17, 23, 0.9);
            --bg-card: #1c2128;


            --text-primary: #f0f6fc;
            --text-secondary: #8b949e;
            --text-muted: #6e7681;
            --text-inverse: #0d1117;


            --border-color: rgba(240, 246, 252, 0.1);
            --border-light: rgba(240, 246, 252, 0.05);


            --gradient-primary: linear-gradient(135deg, #5b73ff 0%, #4361ee 100%);
            --gradient-secondary: linear-gradient(135deg, #9d4edd 0%, #7209b7 100%);
            --gradient-accent: linear-gradient(135deg, #ff7849 0%, #ff6b35 100%);
            --gradient-hero: linear-gradient(135deg, #0d1117 0%, #161b22 100%);


            --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.5);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
            transition: all var(--animation-speed) var(--animation-curve);
        }

        .alert {
            border: none;
            border-radius: 16px;
            padding: 1rem 1.5rem;
            margin-bottom: 1rem;
            box-shadow: var(--shadow-md);
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }

        .alert::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: currentColor;
        }

        .alert-success {
            background: rgba(40, 167, 69, 0.1);
            color: var(--success-color);
            border: 1px solid rgba(40, 167, 69, 0.2);
        }

        .alert-danger {
            background: rgba(220, 53, 69, 0.1);
            color: var(--danger-color);
            border: 1px solid rgba(220, 53, 69, 0.2);
        }

        .alert-warning {
            background: rgba(255, 193, 7, 0.1);
            color: var(--warning-color);
            border: 1px solid rgba(255, 193, 7, 0.2);
        }

        .alert-info {
            background: rgba(23, 162, 184, 0.1);
            color: var(--info-color);
            border: 1px solid rgba(23, 162, 184, 0.2);
        }

        .alert-dismissible .btn-close {
            padding: 0.75rem 1rem;
            margin: -0.75rem -1rem -0.75rem auto;
        }

        /* Flash Messages Container */
        .flash-messages {
            position: fixed;
            top: 80px;
            right: 20px;
            z-index: 1050;
            max-width: 400px;
            width: 100%;
        }

        /* Theme Toggle Button */
        .theme-toggle {
            position: fixed;
            top: 50%;
            right: 20px;
            transform: translateY(-50%);
            z-index: 1000;
            background: var(--bg-glass);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 8px;
            box-shadow: var(--shadow-lg);
            transition: all var(--animation-speed) var(--animation-curve);
        }

        .theme-toggle:hover {
            transform: translateY(-50%) scale(1.05);
            box-shadow: var(--shadow-xl);
        }

        .theme-toggle-btn {
            background: none;
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            font-size: 1.2rem;
            cursor: pointer;
            transition: all var(--animation-speed) var(--animation-curve);
            position: relative;
            overflow: hidden;
        }

        .theme-toggle-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-primary);
            border-radius: 50%;
            transform: scale(0);
            transition: transform var(--animation-speed) var(--animation-curve);
            z-index: -1;
        }

        .theme-toggle-btn:hover::before {
            transform: scale(1);
        }

        .theme-toggle-btn:hover {
            color: var(--text-inverse);
            transform: rotate(180deg);
        }

        .theme-icon {
            transition: all var(--animation-speed) var(--animation-curve);
        }

        /* Professional Animated Background */
        .animated-background {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            background: var(--bg-secondary);
            overflow: hidden;
            transition: all var(--animation-speed) var(--animation-curve);
        }

        /* Advanced Grid System */
        .tech-grid {
            position: absolute;
            width: 100%;
            height: 100%;
            opacity: 0.03;
            background-image:
                linear-gradient(var(--primary-color) 1px, transparent 1px),
                linear-gradient(90deg, var(--primary-color) 1px, transparent 1px),
                radial-gradient(circle at 50px 50px, var(--accent-color) 2px, transparent 2px);
            background-size: 100px 100px, 100px 100px, 200px 200px;
            animation: gridFlow 30s linear infinite;
        }

        @keyframes gridFlow {
            0% { transform: translate(0, 0); }
            100% { transform: translate(100px, 100px); }
        }

        /* Professional Floating Elements */
        .floating-element {
            position: absolute;
            border-radius: 50%;
            background: radial-gradient(circle at 30% 30%, var(--primary-color), transparent);
            opacity: 0.1;
            animation: professionalFloat 20s ease-in-out infinite;
        }

        .element-1 {
            width: 300px;
            height: 300px;
            top: 10%;
            right: 10%;
            animation-delay: 0s;
        }

        .element-2 {
            width: 200px;
            height: 200px;
            bottom: 20%;
            left: 15%;
            animation-delay: 7s;
            background: radial-gradient(circle at 30% 30%, var(--accent-color), transparent);
        }

        .element-3 {
            width: 150px;
            height: 150px;
            top: 40%;
            left: 5%;
            animation-delay: 14s;
            background: radial-gradient(circle at 30% 30%, var(--secondary-color), transparent);
        }

        @keyframes professionalFloat {
            0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.1; }
            33% { transform: translate(50px, -30px) scale(1.1); opacity: 0.15; }
            66% { transform: translate(-30px, 40px) scale(0.9); opacity: 0.08; }
        }

        /* Advanced Particle System */
        .particle-system {
            position: absolute;
            width: 100%;
            height: 100%;
        }

        .particle {
            position: absolute;
            width: 4px;
            height: 4px;
            background: var(--spark-yellow);
            border-radius: 50%;
            box-shadow: 0 0 6px var(--spark-yellow);
            animation: particleFlow 8s linear infinite;
            opacity: 0.7;
        }

        .particle:nth-child(1) { left: 10%; animation-delay: 0s; }
        .particle:nth-child(2) { left: 30%; animation-delay: 2s; }
        .particle:nth-child(3) { left: 50%; animation-delay: 4s; }
        .particle:nth-child(4) { left: 70%; animation-delay: 6s; }
        .particle:nth-child(5) { left: 90%; animation-delay: 1s; }

        @keyframes particleFlow {
            0% { top: -10px; opacity: 0; transform: scale(0); }
            10% { opacity: 0.7; transform: scale(1); }
            90% { opacity: 0.7; transform: scale(1); }
            100% { top: 100vh; opacity: 0; transform: scale(0); }
        }

        /* Dark Theme Advanced Animations */
        [data-theme="dark"] .tech-grid {
            opacity: 0.08;
            background-image:
                linear-gradient(var(--plasma-blue) 1px, transparent 1px),
                linear-gradient(90deg, var(--plasma-blue) 1px, transparent 1px),
                radial-gradient(circle at 50px 50px, var(--accent-color) 2px, transparent 2px);
            animation: gridFlowDark 25s linear infinite;
        }

        @keyframes gridFlowDark {
            0% { transform: translate(0, 0) rotate(0deg); }
            100% { transform: translate(100px, 100px) rotate(360deg); }
        }

        [data-theme="dark"] .floating-element {
            opacity: 0.2;
            animation: darkFloat 15s ease-in-out infinite;
        }

        @keyframes darkFloat {
            0%, 100% {
                transform: translate(0, 0) scale(1) rotate(0deg);
                opacity: 0.2;
                filter: blur(0px);
            }
            50% {
                transform: translate(30px, -20px) scale(1.2) rotate(180deg);
                opacity: 0.3;
                filter: blur(1px);
            }
        }

        [data-theme="dark"] .particle {
            background: var(--plasma-blue);
            box-shadow:
                0 0 8px var(--plasma-blue),
                0 0 16px var(--primary-color);
            animation: darkParticleFlow 6s linear infinite;
        }

        @keyframes darkParticleFlow {
            0% {
                top: -10px;
                opacity: 0;
                transform: scale(0) rotate(0deg);
                filter: hue-rotate(0deg);
            }
            10% {
                opacity: 1;
                transform: scale(1) rotate(45deg);
                filter: hue-rotate(90deg);
            }
            90% {
                opacity: 1;
                transform: scale(1) rotate(315deg);
                filter: hue-rotate(270deg);
            }
            100% {
                top: 100vh;
                opacity: 0;
                transform: scale(0) rotate(360deg);
                filter: hue-rotate(360deg);
            }
        }

        /* Loading Animation */
        .page-loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--bg-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            transition: opacity 0.5s ease;
        }

        .loader-content {
            text-align: center;
            color: var(--text-primary);
        }

        .advanced-loader {
            width: 80px;
            height: 80px;
            position: relative;
            margin: 0 auto 30px;
        }

        .loader-ring {
            position: absolute;
            border-radius: 50%;
            border: 3px solid transparent;
            animation: loaderSpin 2s linear infinite;
        }

        .loader-ring:nth-child(1) {
            width: 80px;
            height: 80px;
            border-top: 3px solid var(--primary-color);
            animation-duration: 1.5s;
        }

        .loader-ring:nth-child(2) {
            width: 60px;
            height: 60px;
            top: 10px;
            left: 10px;
            border-right: 3px solid var(--accent-color);
            animation-duration: 2s;
            animation-direction: reverse;
        }

        .loader-ring:nth-child(3) {
            width: 40px;
            height: 40px;
            top: 20px;
            left: 20px;
            border-bottom: 3px solid var(--secondary-color);
            animation-duration: 1s;
        }

        .loader-core {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 12px;
            height: 12px;
            background: var(--gradient-primary);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            box-shadow: 0 0 20px var(--primary-color);
            animation: coreGlow 1.5s ease-in-out infinite;
        }

        @keyframes loaderSpin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        @keyframes coreGlow {
            0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
            50% { transform: translate(-50%, -50%) scale(1.3); opacity: 0.7; }
        }

        /* Professional Glassmorphism */
        .glass-card {
            background: var(--bg-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-radius: 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            transition: all var(--animation-speed) var(--animation-curve);
            position: relative;
            overflow: hidden;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                90deg,
                transparent,
                rgba(255, 255, 255, 0.1),
                transparent
            );
            transition: left 0.6s var(--animation-curve);
        }

        .glass-card:hover::before {
            left: 100%;
        }

        .glass-card:hover {
            transform: translateY(-8px) scale(1.02);
            box-shadow: var(--shadow-xl);
            border-color: var(--primary-color);
        }

        /* Enhanced Navigation */
        .navbar {
            padding: 1rem 0;
            transition: all var(--animation-speed) var(--animation-curve);
            background: var(--bg-glass);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid var(--border-light);
        }

        .navbar.scrolled {
            background: var(--bg-glass);
            box-shadow: var(--shadow-md);
            padding: 0.5rem 0;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: all var(--animation-speed) ease;
            position: relative;
        }

        .navbar-brand::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gradient-primary);
            transition: width var(--animation-speed) ease;
        }

        .navbar-brand:hover::after {
            width: 100%;
        }

        .navbar-brand:hover {
            transform: scale(1.05);
        }

        .nav-link {
            font-weight: 500;
            position: relative;
            margin: 0 0.5rem;
            transition: all var(--animation-speed) ease;
            color: var(--text-primary) !important;
        }

        .nav-link::before {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 50%;
            background: var(--gradient-primary);
            transition: all var(--animation-speed) var(--animation-curve);
            transform: translateX(-50%);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                90deg,
                transparent,
                rgba(67, 97, 238, 0.1),
                transparent
            );
            transition: left 0.5s ease;
            z-index: -1;
            border-radius: 8px;
        }

        .nav-link:hover::before {
            width: 100%;
        }

        .nav-link:hover::after {
            left: 100%;
        }

        .nav-link:hover {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }

        /* Hero Section */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--gradient-hero);
            transition: all var(--animation-speed) var(--animation-curve);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(
                circle,
                rgba(67, 97, 238, 0.1) 0%,
                transparent 70%
            );
            z-index: 1;
            animation: heroAura 20s infinite alternate;
        }

        @keyframes heroAura {
            0% { transform: scale(0.8) rotate(0deg); opacity: 0.3; }
            100% { transform: scale(1.3) rotate(180deg); opacity: 0.1; }
        }

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

        .hero-title {
            font-weight: 900;
            font-size: 4rem;
            margin-bottom: 1.5rem;
            line-height: 1.1;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
        }

        .hero-title::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                45deg,
                transparent 30%,
                rgba(255, 255, 255, 0.3) 50%,
                transparent 70%
            );
            -webkit-background-clip: text;
            background-clip: text;
            animation: titleShimmer 3s ease-in-out infinite;
        }

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

        .hero-subtitle {
            font-size: 1.4rem;
            opacity: 0.9;
            margin-bottom: 2.5rem;
            max-width: 600px;
            color: var(--text-secondary);
        }

        /* Professional Buttons */
        .btn-primary {
            background: var(--gradient-primary);
            border: none;
            padding: 1.2rem 2.5rem;
            font-weight: 600;
            border-radius: 16px;
            color: var(--text-inverse);
            position: relative;
            overflow: hidden;
            transition: all var(--animation-speed) var(--animation-curve);
            box-shadow: var(--shadow-md);
            font-size: 1rem;
        }

        .btn-primary::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: left 0.6s var(--animation-curve);
        }

        .btn-primary::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            transition: all 0.4s ease;
        }

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

        .btn-primary:hover::after {
            width: 300px;
            height: 300px;
        }

        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: var(--shadow-lg);
            color: var(--text-inverse);
        }

        .btn-outline-primary {
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            font-weight: 600;
            border-radius: 16px;
            padding: 1.2rem 2.5rem;
            position: relative;
            overflow: hidden;
            transition: all var(--animation-speed) var(--animation-curve);
            background: transparent;
            font-size: 1rem;
        }

        .btn-outline-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            height: 100%;
            background: var(--gradient-primary);
            transition: width var(--animation-speed) var(--animation-curve);
            z-index: -1;
        }

        .btn-outline-primary:hover::before {
            width: 100%;
        }

        .btn-outline-primary:hover {
            color: var(--text-inverse);
            border-color: transparent;
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        /* Feature Cards */
        .feature-card {
            background: var(--bg-card);
            border-radius: 24px;
            padding: 3rem;
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: all var(--animation-speed) var(--animation-curve);
            border: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 0;
            background: var(--gradient-primary);
            transition: height var(--animation-speed) var(--animation-curve);
        }

        .feature-card::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 100%;
            background: radial-gradient(
                circle,
                rgba(67, 97, 238, 0.05) 0%,
                transparent 70%
            );
            opacity: 0;
            transition: opacity var(--animation-speed) ease;
        }

        .feature-card:hover {
            transform: translateY(-12px) scale(1.02);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-color);
        }

        .feature-card:hover::before {
            height: 100%;
        }

        .feature-card:hover::after {
            opacity: 1;
        }

        .feature-icon {
            font-size: 3.5rem;
            margin-bottom: 2rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            transition: all var(--animation-speed) ease;
            display: inline-block;
            position: relative;
        }

        .feature-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(67, 97, 238, 0.1);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            transition: all var(--animation-speed) ease;
            z-index: -1;
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.1) rotate(5deg);
        }

        .feature-card:hover .feature-icon::after {
            width: 100px;
            height: 100px;
        }

        /* Tech Stack */
        .tech-item {
            background: rgba(67, 97, 238, 0.1);
            color: var(--primary-color);
            padding: 0.8rem 1.5rem;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--animation-speed) var(--animation-curve);
            border: 1px solid rgba(67, 97, 238, 0.2);
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(10px);
            margin: 0.3rem;
            display: inline-block;
        }

        .tech-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: var(--gradient-primary);
            transition: left var(--animation-speed) var(--animation-curve);
            z-index: -1;
        }

        .tech-item:hover::before {
            left: 0;
        }

        .tech-item:hover {
            color: var(--text-inverse);
            transform: translateY(-3px) scale(1.05);
            box-shadow: var(--shadow-md);
        }

        /* Scroll Cards */
        .scroll-container {
            overflow: hidden;
            position: relative;
            width: 100%;
            padding: 3rem 0;
        }

        .scroll-track {
            display: flex;
            width: fit-content;
            animation: scrollLeft 50s linear infinite;
        }

        @keyframes scrollLeft {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        .scroll-container:hover .scroll-track {
            animation-play-state: paused;
        }

        .scroll-card {
            background: var(--bg-card);
            border-radius: 20px;
            width: 320px;
            margin: 0 20px;
            padding: 2.5rem;
            box-shadow: var(--shadow-sm);
            transition: all var(--animation-speed) var(--animation-curve);
            flex-shrink: 0;
            text-align: center;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-light);
        }

        .scroll-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--gradient-primary);
            transform: scaleX(0);
            transition: transform var(--animation-speed) var(--animation-curve);
        }

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

        .scroll-card:hover {
            transform: translateY(-10px) scale(1.03);
            box-shadow: var(--shadow-lg);
        }

        /* Step Icons */
        .step-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-secondary);
            box-shadow: var(--shadow-sm);
            transition: all var(--animation-speed) var(--animation-curve);
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-light);
        }

        .step-icon::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-primary);
            border-radius: 50%;
            transform: scale(0);
            transition: transform var(--animation-speed) var(--animation-curve);
        }

        .step-icon:hover::before {
            transform: scale(1);
        }

        .step-icon:hover {
            transform: scale(1.15) rotate(10deg);
            box-shadow: var(--shadow-lg);
        }

        .step-icon:hover i {
            color: var(--text-inverse) !important;
            z-index: 1;
            position: relative;
        }

        /* Video Container */
        .video-container {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            transition: all var(--animation-speed) var(--animation-curve);
            border: 1px solid var(--border-light);
        }

        .video-container:hover {
            transform: scale(1.02);
            box-shadow: var(--shadow-xl);
        }

        /* Modal Animations */
        .modal.fade .modal-dialog {
            transform: scale(0.8) translateY(-50px);
            transition: all var(--animation-speed) var(--animation-curve);
        }

        .modal.show .modal-dialog {
            transform: scale(1) translateY(0);
        }

        .modal-content {
            border: none;
            border-radius: 24px;
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--border-color);
        }

        .auth-header {
            padding: 3rem;
            text-align: center;
            background: var(--gradient-primary);
            color: var(--text-inverse);
            position: relative;
            overflow: hidden;
        }

        .auth-header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(
                circle,
                rgba(255, 255, 255, 0.1) 0%,
                transparent 70%
            );
            animation: authGlow 8s infinite alternate;
        }

        @keyframes authGlow {
            0% { transform: scale(0.8) rotate(0deg); }
            100% { transform: scale(1.2) rotate(180deg); }
        }

        /* Form Controls */
        .form-control {
            padding: 1.2rem 1.5rem;
            border-radius: 16px;
            border: 2px solid var(--border-color);
            transition: all var(--animation-speed) var(--animation-curve);
            font-size: 1rem;
            background: var(--bg-card);
            color: var(--text-primary);
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.15);
            transform: translateY(-2px);
            background: var(--bg-card);
            color: var(--text-primary);
        }

        /* Section Headers */
        .section-header h2 {
            font-weight: 800;
            font-size: 3.5rem;
            margin-bottom: 1rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            position: relative;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: var(--gradient-accent);
            border-radius: 2px;
            box-shadow: 0 2px 10px rgba(255, 107, 53, 0.3);
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 1.1rem;
        }

        /* Footer */
        .footer {
            background: var(--bg-tertiary);
            color: var(--text-primary);
            padding: 5rem 0 2rem;
            position: relative;
            overflow: hidden;
            border-top: 1px solid var(--border-color);
        }

        .footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: var(--gradient-primary);
            box-shadow: 0 0 10px rgba(67, 97, 238, 0.5);
        }

        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-primary);
            margin-right: 15px;
            transition: all var(--animation-speed) var(--animation-curve);
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .social-links a::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-primary);
            border-radius: 50%;
            transform: scale(0);
            transition: transform var(--animation-speed) var(--animation-curve);
        }

        .social-links a:hover::before {
            transform: scale(1);
        }

        .social-links a:hover {
            transform: translateY(-5px) scale(1.1);
            box-shadow: var(--shadow-lg);
        }

        .social-links a:hover {
            color: var(--text-inverse);
        }

        .social-links a i {
            position: relative;
            z-index: 1;
        }

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

        @keyframes floating {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-20px); }
            100% { transform: translateY(0px); }
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hero-title { font-size: 3rem;  margin-top: 30px; }
            .section-header h2 { font-size: 2.5rem; }
            .theme-toggle { right: 10px; }
            .flash-messages { right: 10px; max-width: 350px; }
        }

        @media (max-width: 768px) {
            .hero-title { font-size: 2.5rem; }
            .section-header h2 { font-size: 2rem; }
            .feature-card { padding: 2rem; }
            .animated-background { opacity: 0.5; }
            .theme-toggle {
                right: 10px;
                top: auto;
                bottom: 20px;
                transform: none;
            }
            .flash-messages {
                right: 10px;
                left: 10px;
                max-width: none;
                top: 70px;
            }
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-secondary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--gradient-primary);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }

        /* Intersection Observer Animations */
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s var(--animation-curve);
        }

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

        .fade-in-left {
            opacity: 0;
            transform: translateX(-30px);
            transition: all 0.8s var(--animation-curve);
        }

        .fade-in-left.animate {
            opacity: 1;
            transform: translateX(0);
        }

        .fade-in-right {
            opacity: 0;
            transform: translateX(30px);
            transition: all 0.8s var(--animation-curve);
        }

        .fade-in-right.animate {
            opacity: 1;
            transform: translateX(0);
        }

        /* Badge */
        .badge {
            display: inline-block;
            padding: 0.6em 1.2em;
            font-size: 0.8em;
            font-weight: 600;
            color: var(--primary-color);
            background: rgba(67, 97, 238, 0.1);
            border-radius: 25px;
            margin: 0.3rem;
            transition: all var(--animation-speed) ease;
            border: 1px solid rgba(67, 97, 238, 0.2);
            position: relative;
            overflow: hidden;
        }

        .badge::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: var(--gradient-primary);
            transition: left var(--animation-speed) ease;
            z-index: -1;
        }

        .badge:hover::before {
            left: 0;
        }

        .badge:hover {
            color: var(--text-inverse);
            transform: scale(1.05);
            box-shadow: var(--shadow-sm);
        }

        /* Theme transition effects */
        * {
            transition: background-color var(--animation-speed) var(--animation-curve),
                        color var(--animation-speed) var(--animation-curve),
                        border-color var(--animation-speed) var(--animation-curve),
                        box-shadow var(--animation-speed) var(--animation-curve);
        }

        .tech-circle {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .tech-icon {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 10px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            transition: transform 0.3s ease;
        }

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

        .tech-label {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .row.g-4 {
            margin-top: 1rem;
        }

        /* Enhanced Workflow Section */
        .workflow {
            padding: 100px 5%;
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .workflow::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(circle at 20% 20%, rgba(67, 97, 238, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
            z-index: 0;
        }

        .workflow > * {
            position: relative;
            z-index: 1;
        }

        .workflow h2 {
            color: var(--text-primary);
            font-weight: 800;
            font-size: 3rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1rem;
        }

        .workflow .text-muted {
            color: var(--text-secondary) !important;
            font-size: 1.2rem;
            margin-bottom: 3rem;
        }

        .workflow-steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 60px;
            position: relative;
            padding: 40px 0;
        }

        /* Enhanced Connecting Line */
        .workflow-steps::before {
            content: '';
            position: absolute;
            top: 75px; /* Aligned with step circles */
            left: 10%;
            right: 10%;
            height: 4px;
            background: linear-gradient(
                90deg,
                var(--primary-color) 0%,
                var(--accent-color) 50%,
                var(--secondary-color) 100%
            );
            border-radius: 2px;
            z-index: 1;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 1.5s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow:
                0 0 20px rgba(67, 97, 238, 0.3),
                0 4px 15px rgba(67, 97, 238, 0.2);
        }

        /* Animated dots along the line */
        .workflow-steps::after {
            content: '';
            position: absolute;
            top: 73px;
            left: 10%;
            width: 8px;
            height: 8px;
            background: var(--accent-color);
            border-radius: 50%;
            z-index: 2;
            opacity: 0;
            animation: dotTravel 3s ease-in-out infinite;
            box-shadow: 0 0 15px var(--accent-color);
        }

        @keyframes dotTravel {
            0% {
                left: 10%;
                opacity: 0;
                transform: scale(0.5);
            }
            10% {
                opacity: 1;
                transform: scale(1);
            }
            90% {
                opacity: 1;
                transform: scale(1);
            }
            100% {
                left: 90%;
                opacity: 0;
                transform: scale(0.5);
            }
        }

        .workflow-steps.animate::before {
            transform: scaleX(1);
        }

        .workflow-steps.animate::after {
            animation-delay: 1s;
        }

        .step {
            width: 220px;
            text-align: center;
            position: relative;
            z-index: 3;
            opacity: 0;
            transform: translateY(50px) scale(0.8);
            transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
            background: var(--bg-card);
            padding: 30px 20px;
            border-radius: 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .step::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(
                135deg,
                rgba(67, 97, 238, 0.05) 0%,
                rgba(255, 107, 53, 0.05) 100%
            );
            border-radius: 20px;
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: -1;
        }

        .step:hover::before {
            opacity: 1;
        }

        .step:hover {
            transform: translateY(-10px) scale(1.05);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-color);
        }

        .step.animate {
            opacity: 1;
            transform: translateY(0) scale(1);
        }

        .step:nth-child(1) { transition-delay: 0.2s; }
        .step:nth-child(2) { transition-delay: 0.4s; }
        .step:nth-child(3) { transition-delay: 0.6s; }
        .step:nth-child(4) { transition-delay: 0.8s; }
        .step:nth-child(5) { transition-delay: 1s; }

        .step-circle {
            width: 80px;
            height: 80px;
            background: var(--bg-card);
            border: 4px solid var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            box-shadow:
                var(--shadow-md),
                0 0 0 8px rgba(67, 97, 238, 0.1);
            z-index: 4;
            position: relative;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            overflow: hidden;
        }

        .step-circle::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--gradient-primary);
            border-radius: 50%;
            transform: scale(0);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: -1;
        }

        .step:hover .step-circle::before {
            transform: scale(1);
        }

        .step:hover .step-circle {
            color: var(--text-inverse);
            border-color: transparent;
            box-shadow:
                var(--shadow-lg),
                0 0 0 12px rgba(67, 97, 238, 0.15),
                0 0 30px rgba(67, 97, 238, 0.3);
            transform: scale(1.1) rotate(10deg);
        }

        .step h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--text-primary);
            font-weight: 700;
            transition: color 0.3s ease;
        }

        .step:hover h3 {
            color: var(--primary-color);
        }

        .step p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.6;
            margin: 0;
            transition: color 0.3s ease;
        }

        .step:hover p {
            color: var(--text-primary);
        }

        /* Pulse animation for step circles */
        .step.animate .step-circle {
            animation: stepPulse 2s ease-in-out infinite;
        }

        @keyframes stepPulse {
            0%, 100% {
                box-shadow:
                    var(--shadow-md),
                    0 0 0 8px rgba(67, 97, 238, 0.1);
            }
            50% {
                box-shadow:
                    var(--shadow-md),
                    0 0 0 12px rgba(67, 97, 238, 0.2);
            }
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .workflow {
                padding: 60px 3%;
            }

            .workflow h2 {
                font-size: 2.2rem;
            }

            .workflow-steps {
                flex-direction: column;
                align-items: center;
                gap: 50px;
            }

            .workflow-steps::before {
                display: none;
            }

            .workflow-steps::after {
                display: none;
            }

            .step {
                width: 100%;
                max-width: 300px;
                margin: 0 auto;
            }

            .step-circle {
                width: 70px;
                height: 70px;
                font-size: 1.5rem;
            }
        }

        @media (max-width: 480px) {
            .workflow h2 {
                font-size: 1.8rem;
            }

            .step {
                padding: 25px 15px;
            }

            .step h3 {
                font-size: 1.2rem;
            }

            .step p {
                font-size: 0.9rem;
            }
        }