:root {
            --primary-color: #2563eb;
            --primary-hover: #1d4ed8;
            --secondary-color: #64748b;
            --accent-color: #10b981;
            --accent-hover: #059669;
            --danger-color: #ef4444;
            --danger-hover: #dc2626;
            --warning-color: #f59e0b;
            --warning-hover: #d97706;
            --background-primary: #ffffff;
            --background-secondary: #f8fafc;
            --background-accent: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-tertiary: #64748b;
            --border-color: #e2e8f0;
            --border-hover: #cbd5e1;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
            --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
            --radius-sm: 0.375rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #667eea 100%);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Professional Header */
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1280px;
            margin: 0 auto;
            padding: 1rem 1.5rem;
            height: 80px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            color: var(--primary-color);
            font-weight: 700;
            font-size: 1.5rem;
            transition: all 0.3s ease;
        }

        .logo:hover {
            transform: translateY(-1px);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            border-radius: var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.25rem;
            box-shadow: var(--shadow-md);
        }

        /* Desktop Navigation */
        .nav-links {
            display: flex;
            list-style: none;
            gap: 0.5rem;
            align-items: center;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--primary-color);
            background: rgba(37, 99, 235, 0.1);
            transform: translateY(-1px);
        }

        .nav-links a.active {
            color: var(--primary-color);
            background: rgba(37, 99, 235, 0.1);
            font-weight: 600;
        }

        /* Mobile Menu Toggle */
        .mobile-menu-toggle {
            display: none;
            background: var(--primary-color);
            color: white;
            border: none;
            padding: 0.75rem;
            border-radius: var(--radius-md);
            cursor: pointer;
            font-size: 1.125rem;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
        }

        .mobile-menu-toggle:hover {
            background: var(--primary-hover);
            transform: scale(1.05);
        }

        .mobile-menu-toggle:active {
            transform: scale(0.95);
        }

        /* Mobile Navigation */
        .mobile-nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            z-index: 1001;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .mobile-nav-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .mobile-nav-menu {
            position: fixed;
            top: 0;
            right: -100%;
            width: min(400px, 85vw);
            height: 100%;
            background: var(--background-primary);
            box-shadow: var(--shadow-xl);
            transition: right 0.3s ease;
            z-index: 1002;
            display: flex;
            flex-direction: column;
        }

        .mobile-nav-menu.open {
            right: 0;
        }

        .mobile-nav-header {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            color: white;
            padding: 2rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .mobile-nav-title {
            font-weight: 700;
            font-size: 1.25rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .mobile-close-btn {
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-close-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: scale(1.1);
        }

        .mobile-nav-content {
            flex: 1;
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .mobile-nav-links {
            list-style: none;
            margin-bottom: 2rem;
        }

        .mobile-nav-links li {
            margin-bottom: 0.25rem;
        }

        .mobile-nav-links a {
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 1rem;
            padding: 1rem 1.25rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
            border-left: 3px solid transparent;
        }

        .mobile-nav-links a:hover {
            background: var(--background-accent);
            color: var(--primary-color);
            border-left-color: var(--primary-color);
            transform: translateX(0.25rem);
        }

        .mobile-nav-links a.active {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            color: white;
            border-left-color: var(--warning-color);
            box-shadow: var(--shadow-md);
        }

        /* Main Content */
        .main-content {
            padding: 2rem 0;
        }

        /* Form Container */
        .form-container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            padding: 3rem;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-xl);
            max-width: 600px;
            margin: 2rem auto;
            border: 1px solid rgba(255, 255, 255, 0.2);
            position: relative;
            overflow: hidden;
        }

        .form-container::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
            animation: formFloat 8s ease-in-out infinite;
        }

        @keyframes formFloat {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }

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

        .form-container h2 {
            text-align: center;
            margin-bottom: 2rem;
            color: var(--text-primary);
            font-size: 2rem;
            font-weight: 700;
        }

        .form-subtitle {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 2.5rem;
            font-size: 1.125rem;
        }

        /* Form Styles */
        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }

        .form-group input {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: var(--radius-lg);
            font-size: 1rem;
            transition: all 0.3s ease;
            background: var(--background-primary);
            color: var(--text-primary);
        }

        .form-group input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            transform: translateY(-1px);
        }

        .form-group input.error {
            border-color: var(--danger-color);
            box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
        }

        .form-group input.success {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 1rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            text-decoration: none;
            border-radius: var(--radius-lg);
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
            width: 100%;
        }

        .btn::before {
            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: width 0.3s, height 0.3s;
        }

        .btn:hover::before {
            width: 200%;
            height: 200%;
        }

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

        .btn:active {
            transform: translateY(0);
        }

        .btn.primary {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
            color: white;
        }

        .btn.secondary {
            background: linear-gradient(135deg, var(--secondary-color), #475569);
            color: white;
        }

        .btn.success {
            background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
            color: white;
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        /* Alert Messages */
        .alert {
            padding: 1rem;
            margin: 1rem 0;
            border-radius: var(--radius-lg);
            font-weight: 500;
            text-align: center;
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .alert::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            animation: alertShimmer 2s infinite;
        }

        @keyframes alertShimmer {
            0% { left: -100%; }
            100% { left: 100%; }
        }

        .alert.success {
            background: linear-gradient(135deg, #d1fae5, #a7f3d0);
            color: #065f46;
            border-color: #059669;
        }

        .alert.error {
            background: linear-gradient(135deg, #fee2e2, #fecaca);
            color: #991b1b;
            border-color: #dc2626;
        }

        /* Links */
        .text-center {
            text-align: center;
            margin-top: 1.5rem;
        }

        .text-center a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .text-center a:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }

        /* Success Message */
        .success-message {
            text-align: center;
            padding: 3rem 2rem;
        }

        .success-message h2 {
            color: var(--accent-color);
            margin-bottom: 1.5rem;
            font-size: 2.25rem;
            font-weight: 700;
        }

        .success-message p {
            margin: 1rem 0;
            line-height: 1.7;
            color: var(--text-secondary);
            font-size: 1.125rem;
        }

        .success-actions {
            margin-top: 2.5rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .success-actions .btn {
            width: 100%;
        }

        .success-info {
            margin-top: 2rem;
            padding: 1.5rem;
            background: var(--background-secondary);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }

        .success-info small {
            color: var(--text-tertiary);
            font-size: 0.875rem;
            line-height: 1.6;
        }

        /* Loading State */
        .loading {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .spinner {
            width: 20px;
            height: 20px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-top: 2px solid white;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

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

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .container {
                padding: 0 1rem;
            }

            .form-container {
                padding: 2rem 1.5rem;
                margin: 1.5rem auto;
            }

            .form-container h2 {
                font-size: 1.75rem;
            }

            .success-actions {
                flex-direction: column;
            }

            .mobile-nav-menu {
                width: 100%;
            }
        }

        @media (max-width: 480px) {
            .form-container {
                padding: 1.5rem 1rem;
                margin: 1rem auto;
            }

            .form-container h2 {
                font-size: 1.5rem;
            }
        }

        /* Utility Classes */
        .hidden {
            display: none !important;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }