:root {
            --primary-color: #6366f1;
            --primary-hover: #4f46e5;
            --bg-primary: #1a1b26;
            --bg-secondary: #24283b;
            --text-primary: #c0caf5;
            --text-secondary: #9aa5ce;
            --border-color: #414868;
            --success-color: #9ece6a;
            --error-color: #f7768e;
            --warning-color: #e0af68;
        }

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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            color: var(--text-primary);
            padding: 20px;
        }

        .container {
            width: 100%;
            max-width: 480px;
        }

        .logo {
            text-align: center;
            margin-bottom: 2rem;
        }

        .logo h1 {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }

        .logo p {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .card {
            background: var(--bg-secondary);
            border-radius: 16px;
            padding: 2.5rem;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
            border: 1px solid var(--border-color);
        }

        .step-indicator {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 2rem;
            gap: 1rem;
        }

        .step {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            transition: all 0.3s ease;
        }

        .step.active {
            background: var(--primary-color);
            box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
        }

        .step.completed {
            background: var(--success-color);
        }

        .step-line {
            width: 60px;
            height: 2px;
            background: var(--border-color);
            transition: all 0.3s ease;
        }

        .step-line.active {
            background: var(--primary-color);
        }

        h2 {
            text-align: center;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .subtitle {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 2rem;
            font-size: 0.9rem;
        }

        .form-step {
            display: none;
        }

        .form-step.active {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }

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

        .form-group {
            margin-bottom: 1.5rem;
        }

        label {
            display: block;
            margin-bottom: 0.5rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
        }

        .input-group {
            position: relative;
        }

        .input-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
        }

        input {
            width: 100%;
            padding: 0.875rem 1rem 0.875rem 2.75rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: var(--bg-primary);
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

        input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        input::placeholder {
            color: var(--text-secondary);
        }

        .password-toggle {
            position: absolute;
            right: 1rem;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 0.5rem;
            transition: color 0.3s ease;
        }

        .password-toggle:hover {
            color: var(--text-primary);
        }

        .password-strength {
            margin-top: 0.5rem;
            padding: 0.5rem;
            border-radius: 4px;
            font-size: 0.85rem;
            text-align: center;
            display: none;
        }

        .password-strength.visible {
            display: block;
        }

        .strength-weak {
            background: rgba(247, 118, 142, 0.1);
            color: var(--error-color);
        }

        .strength-medium {
            background: rgba(224, 175, 104, 0.1);
            color: var(--warning-color);
        }

        .strength-strong {
            background: rgba(158, 206, 106, 0.1);
            color: var(--success-color);
        }

        .btn {
            width: 100%;
            padding: 1rem;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .btn-primary {
            background: var(--primary-color);
            color: white;
        }

        .btn-primary:hover:not(:disabled) {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
        }

        .btn:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }

        .spinner {
            width: 18px;
            height: 18px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-top-color: white;
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

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

        .back-link {
            text-align: center;
            margin-top: 1.5rem;
        }

        .back-link a {
            color: var(--primary-color);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s ease;
        }

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

        .alert {
            padding: 1rem;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            display: none;
            animation: slideDown 0.3s ease;
        }

        .alert.show {
            display: block;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }

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

        .alert-error {
            background: rgba(247, 118, 142, 0.1);
            border: 1px solid var(--error-color);
            color: var(--error-color);
        }

        .alert-success {
            background: rgba(158, 206, 106, 0.1);
            border: 1px solid var(--success-color);
            color: var(--success-color);
        }

        @media (max-width: 480px) {
            .card {
                padding: 1.5rem;
            }

            .logo h1 {
                font-size: 1.5rem;
            }

            .step {
                width: 35px;
                height: 35px;
                font-size: 0.9rem;
            }

            .step-line {
                width: 40px;
            }
        }