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

        body {
            font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            position: relative;
            overflow-x: hidden;
        }

        .background-animation {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: 0;
        }

        .floating-code {
            position: absolute;
            color: rgba(255, 255, 255, 0.1);
            font-family: 'Courier New', monospace;
            font-size: 14px;
            animation: float 20s infinite linear;
            user-select: none;
        }

        @keyframes float {
            0% { transform: translateY(100vh) rotate(0deg); }
            100% { transform: translateY(-100px) rotate(360deg); }
        }

        .signup-container {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-radius: 24px;
            padding: 40px;
            width: 100%;
            max-width: 450px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            position: relative;
            z-index: 1;
            transform: translateY(20px);
            opacity: 0;
            animation: slideUp 0.8s ease-out 0.2s forwards;
        }

        @keyframes slideUp {
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }

        .logo-section {
            text-align: center;
            margin-bottom: 30px;
        }

        .logo {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            border-radius: 20px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
            transform: scale(0);
            animation: scaleIn 0.6s ease-out 0.4s forwards;
        }

        @keyframes scaleIn {
            to { transform: scale(1); }
        }

        .logo::before {
            content: '</>';
            color: white;
            font-size: 32px;
            font-weight: bold;
        }

        .title {
            font-size: 28px;
            font-weight: 700;
            color: #1f2937;
            margin-bottom: 8px;
        }

        .subtitle {
            color: #6b7280;
            font-size: 16px;
            margin-bottom: 30px;
        }

        .form-group {
            margin-bottom: 24px;
            position: relative;
        }

        .form-label {
            display: block;
            font-weight: 600;
            color: #374151;
            margin-bottom: 8px;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .form-input {
            width: 100%;
            padding: 16px 20px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
            background: #f9fafb;
            outline: none;
        }

        .form-input:focus {
            border-color: #6366f1;
            background: white;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
            transform: translateY(-2px);
        }

        .form-input.error {
            border-color: #ef4444;
            background: #fef2f2;
        }

        .error-message {
            color: #ef4444;
            font-size: 12px;
            margin-top: 4px;
            display: none;
        }

        .role-selector {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 8px;
        }

        .role-option {
            position: relative;
        }

        .role-option input[type="radio"] {
            position: absolute;
            opacity: 0;
        }

        .role-label {
            display: block;
            padding: 16px;
            border: 2px solid #e5e7eb;
            border-radius: 12px;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            background: #f9fafb;
            font-weight: 500;
        }

        .role-option input[type="radio"]:checked + .role-label {
            border-color: #6366f1;
            background: #eef2ff;
            color: #6366f1;
            transform: scale(1.02);
        }

        .signup-btn {
            width: 100%;
            padding: 18px;
            background: linear-gradient(135deg, #6366f1, #8b5cf6);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 1px;
            position: relative;
            overflow: hidden;
        }

        .signup-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 35px rgba(99, 102, 241, 0.4);
        }

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

        .signup-btn:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
        }

        .btn-loading {
            display: none;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .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); }
        }

        .login-link {
            text-align: center;
            margin-top: 24px;
            color: #6b7280;
        }

        .login-link a {
            color: #6366f1;
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .login-link a:hover {
            color: #4f46e5;
        }

        .success-message {
            background: #10b981;
            color: white;
            padding: 16px;
            border-radius: 12px;
            margin-bottom: 20px;
            text-align: center;
            display: none;
            animation: slideDown 0.3s ease-out;
        }

        @keyframes slideDown {
            from { transform: translateY(-20px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

        .error-alert {
            background: #ef4444;
            color: white;
            padding: 16px;
            border-radius: 12px;
            margin-bottom: 20px;
            text-align: center;
            display: none;
            animation: slideDown 0.3s ease-out;
        }

        @media (max-width: 480px) {
            .signup-container {
                padding: 30px 20px;
                margin: 10px;
            }
            
            .role-selector {
                grid-template-columns: 1fr;
            }
        }