.auth-container{height:100vh;background:linear-gradient(90deg,#f8f9fa,#ffffff)}.login-box,.register-box{background:white;border-radius:10px;width:350px;padding:25px;border:1px solid #ddd}.logo{width:60px;height:60px;margin-bottom:15px}.btn-primary{background:linear-gradient(90deg,#007bff,#0056b3);border:none}.btn-primary:hover{opacity:.9}.form-control{padding:10px;border-radius:8px}.back-button{position:absolute;top:15px;left:15px}