polymer_2.0.2/bower_components/paper-styles/classes/shadow.html

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<!--
Note that this file probably doesn't do what you expect it to do. It's not
a `<style is=custom-style include="..."` type of style include, which mean
these styles will only apply to the main document, regardless of where
you import this file.

For a set of styles that can be applied to an element, check paper-styles/shadow.html.
-->
<style>
.shadow-transition {
  transition: box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.shadow-elevation-2dp {
  box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.14),
              0 1px 5px 0 rgba(0, 0, 0, 0.12),
              0 3px 1px -2px rgba(0, 0, 0, 0.2);
}

.shadow-elevation-3dp {
  box-shadow: 0 3px 4px 0 rgba(0, 0, 0, 0.14),
              0 1px 8px 0 rgba(0, 0, 0, 0.12),
              0 3px 3px -2px rgba(0, 0, 0, 0.4);
}

.shadow-elevation-4dp {
  box-shadow: 0 4px 5px 0 rgba(0, 0, 0, 0.14),
              0 1px 10px 0 rgba(0, 0, 0, 0.12),
              0 2px 4px -1px rgba(0, 0, 0, 0.4);
}

.shadow-elevation-6dp {
  box-shadow: 0 6px 10px 0 rgba(0, 0, 0, 0.14),
              0 1px 18px 0 rgba(0, 0, 0, 0.12),
              0 3px 5px -1px rgba(0, 0, 0, 0.4);
}

.shadow-elevation-8dp {
  box-shadow: 0 8px 10px 1px rgba(0, 0, 0, 0.14),
              0 3px 14px 2px rgba(0, 0, 0, 0.12),
              0 5px 5px -3px rgba(0, 0, 0, 0.4);
}

.shadow-elevation-16dp {
  box-shadow: 0 16px 24px 2px rgba(0, 0, 0, 0.14),
              0  6px 30px 5px rgba(0, 0, 0, 0.12),
              0  8px 10px -5px rgba(0, 0, 0, 0.4);
}

</style>