You can create a full-page background image using CSS using the background and background-size properties like this:

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body { 
  background-image: url('background_image.jpg');
  background-size: cover;
}

This will stretch and scale the background image to fit the whole page. For more detailed instructions, check out this article.

You can use the background-image property in CSS to add a background border to an element. Here is an example written in CSS:

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div {
  background-image: linear-gradient(to bottom, #ba9064 0%, #ba9064 1%, #d1ac7f 4%, #d1ac7f 95%);
}

For more information, you can check out this tutorial: https://www.w3schools.com/css/css3_gradients.asp.

Using HTML and CSS, it is possible to create an oval shape image and an oval shape line on top of it.

To create an oval shape with HTML, you must first create a <div> element and set its border-radius property to 50%:

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<div class="oval-image"></div>

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.oval-image {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background-image: url(your_image.png);
  background-size: cover; /* Optional */
}

To add an oval shape line on top of it, you can create a pseudo element in your CSS:

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.oval-image::after {
  content: "";
  position: absolute;
  width: 140px;
  border: 10px solid #000000;
  border-radius: 50%;
}

You can use the background-image CSS property to add a background image from a local file to an element (in this case the body):

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body { 
  background-image: url('./my-background-image.jpg');
}

You will also need to set the background-size, background-repeat, background-attachment, background-position and background-origin properties appropriately based on the style you wish to achieve.

For more information, please see MDN Documentation on the background-image CSS property.

To add an image as a background in HTML, you can use the background-image property of CSS. The syntax is shown below:

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body {
  background-image: url("image.jpg");
}

In this example, "image.jpg" should be replaced with the filename of the image you want to use. For more information, please refer to this article from W3Schools: Background Images.

Using HTML and CSS, you can create a background with a linear-gradient by defining the linear-gradient for the background-image property of the body tag.

For example, in CSS you could use the following syntax:

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body {
  background-image: linear-gradient(#BFBFBF, #404040);
}

This will create a linear-gradient, starting with color #BFBFBF at the top and transitioning to color #404040 at the bottom.

Further information on linear-gradient syntax can be found in the Mozilla Developer Network Documentation.

To create a gradient in CSS, use the background-image property with the linear-gradient() function. Inside the parentheses, you can specify the direction of the gradient (e.g. left-right, top-bottom), its colors (using the rgb or hex background colors) and the distance of colors. Here’s an example:

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background-image: linear-gradient(left-right, rgb(255, 0, 0), rgb(0, 255, 0)); 

This code creates a gradient from red (on the left) to green (on the right).

For more details, you can also refer to Mozilla Developer Network.

To fix a background image, you can use the CSS background-image property. To set the background of an element, use a basic syntax combining the background-image property and the url() function. See the example below:

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element {
    background-image: url("image.jpg");
}

You can also set the size, position, and tiling option of the background image with the background-size, background-position, and background-repeat properties. See the example below:

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element {
    background-image: url("image.jpg");
    background-size: cover; // makes background image full-coverage
    background-position: center;
    background-repeat: no-repeat; // removes any tiling that would otherwise occur
}

For more information about the CSS background-image property and how to use it, you can refer to MDN's documentation.

You can use CSS gradients to style text by using the background-image property. For example:

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h1 {
    background-image: linear-gradient(to right, #00d2ff 0%, #3a7bd5 51%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

This will give your h1 elements a linear gradient from blue to purple, with the text taking on the gradient color.

More information can be found in this tutorial from W3Schools: Using CSS Gradients with Text.

To use CSS to add a gradient to an HTML page, you can use the background-image property with linear-gradient() as the value. The CSS code to do this looks like this:

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body {
 background-image: linear-gradient(red, yellow);
}

This creates a linear gradient that goes from red to yellow. More information and examples for creating gradients with CSS can be found in the MDN web docs.