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

        :root {
            --primary-purple: #8b6a8e;
            --primary-pink: #d97ba6;
            --text-dark: #4a4a4a;
            --button-blue: #2196f3;
            --button-hover: #1976d2;
            --border-color: #ddd;
            --bg-purple: #8b6a8e;
            --error-red: #d32f2f;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: linear-gradient(135deg, #864786 0%, #665061 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .header {
            width: 100%;
            background: white;
            padding: 15px 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1000;
        }

        .header-title {
            font-size: 1.3rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }

        .header-title .alberba {
            color: var(--text-dark);
        }

        .header-title .dental-clinic {
            color: var(--primary-pink);
        }

        .back-btn {
            background: var(--primary-pink);
            color: white;
            border: none;
            padding: 8px 20px;
            border-radius: 4px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: opacity 0.2s;
            text-decoration: none;
            display: inline-block;
        }

        .back-btn:hover {
            opacity: 0.9;
        }

        .container {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 100px 2rem 2rem 2rem;
            max-width: 1400px;
            margin: 0 auto;
            width: 100%;
        }

        .register-card {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
            padding: 2.5rem;
            width: 100%;
            max-width: 900px;
        }

        .register-title {
            margin-bottom: 1.5rem;
            text-align: center;
        }

        .register-title h1 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }

        .title-alberba {
            color: var(--text-dark);
        }

        .title-clinic {
            color: var(--primary-pink);
        }

        .register-title p {
            color: var(--text-dark);
            font-size: 1.1rem;
            font-weight: 500;
            margin-top: 0.5rem;
        }

        .form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }

        .form-column {
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

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

        .required {
            color: var(--error-red);
            margin-left: 2px;
        }

        .input-wrapper {
            position: relative;
        }

        .form-control {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-size: 0.9rem;
            transition: border-color 0.2s;
        }

        .form-control::placeholder {
            color: #999;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--button-blue);
        }

        .form-control.error {
            border-color: var(--error-red);
        }

        .password-toggle {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            cursor: pointer;
            color: #666;
            padding: 4px;
        }

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

        .error-message {
            color: var(--error-red);
            font-size: 0.75rem;
            margin-top: 0.3rem;
            display: none;
        }

        .error-message.show {
            display: block;
        }

        .register-button {
            width: 50%;
            background-color: var(--button-blue);
            color: white;
            border: none;
            padding: 0.9rem;
            border-radius: 4px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.2s;
            margin: auto;
            grid-column: 1 / -1;
        }

        .register-button:hover {
            background-color: var(--button-hover);
        }

        .register-button:disabled {
            background-color: #ccc;
            cursor: not-allowed;
        }

        .login-link {
            text-align: center;
            margin-top: 1rem;
            font-size: 0.9rem;
            color: #666;
            grid-column: 1 / -1;
        }

        .login-link a {
            color: var(--button-blue);
            text-decoration: none;
            font-weight: 600;
        }

        .login-link a:hover {
            text-decoration: underline;
        }

        .alert {
            padding: 0.75rem 1rem;
            border-radius: 6px;
            margin-bottom: 1.5rem;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .alert.success {
            background: #e6f4ea;
            color: #1b7a2b;
            border: 1px solid #c7e6cc;
        }
        .alert.error {
            background: #fdecea;
            color: #a12b2b;
            border: 1px solid #f3c2c2;
        }

        @media (max-width: 768px) {
            .container {
                padding: 100px 1rem 2rem 1rem;
            }

            .register-card {
                padding: 2rem 1.5rem;
            }

            .form-layout {
                grid-template-columns: 1fr;
                gap: 0;
            }

            .form-row {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .header {
                padding: 0.75rem 1rem;
            }

            .header-title {
                font-size: 1.1rem;
            }

            .back-btn {
                padding: 0.4rem 1rem;
                font-size: 0.85rem;
            }
        }