@function textbox-shadow($color) {
  @return 0 0 0 1px $color, 0 0 0 $textbox-shadow-size rgba($color, 0.3);
}

@mixin textbox-focus($color) {
  --newtab-textbox-focus-color: #{$color};
  --newtab-textbox-focus-boxshadow: #{textbox-shadow($color)};
}

// scss variables related to the theme.
$border-primary: 1px solid var(--newtab-border-color);
$border-secondary: 1px solid var(--newtab-border-color);
$inner-box-shadow: 0 0 0 1px var(--newtab-inner-box-shadow-color);
$input-border: 1px solid var(--newtab-border-color);
$input-border-active: 1px solid var(--newtab-textbox-focus-color);
$input-error-border: 1px solid var(--newtab-status-error);
$input-error-boxshadow: #{textbox-shadow(var(--newtab-status-error))};
$shadow-primary: 0 0 0 5px var(--newtab-element-secondary-color);
$shadow-secondary: 0 1px 4px 0 $grey-90-20;
$shadow-large: 0 2px 14px 0 $black-20;
$shadow-focus: 0 0 0 2px var(--newtab-primary-action-background-dimmed);
$shadow-card: 0 2px 6px rgba(0, 0, 0, 15%);
$shadow-image-inset: inset 0 0 0 0.5px $black-15;

// Default theme
:root {
  color-scheme: light;
  // General styles
  --newtab-background-color: #{$in-content-page-background};
  --newtab-background-color-secondary: #{$newtab-background-secondary};
  --newtab-text-primary-color: var(--text-color);
  // Card Background includes 20% transparency
  --newtab-background-card: #{$newtab-background-card};
  --newtab-text-topic-label-color: var(--color-violet-70);
  --newtab-text-secondary-text: var(--text-color-deemphasized);
  // We need to be careful about the contrast of text over newtab wallpapers, which might not match the theme.
  // --newtab-text-primary-color is set in contextTheme.js and reacts to possible installed addon themes.
  // If we use that variable here, with light-dark, we can retain that addon theme text color,
  // and also have a fallback in case the wallpaper contrast doesn't match.
  --newtab-contextual-text-primary-color: light-dark(var(--newtab-text-primary-color), #{$in-content-page-color-dark});
  --newtab-primary-action-background: light-dark(#{$primary-blue}, #{$primary-blue-dark});
  // A button colour closer to the Pocket brand for usage in the Pocket section.
  --newtab-primary-action-background-pocket: #008078;
  --newtab-text-secondary-color: color-mix(in srgb, var(--newtab-text-primary-color) 70%, transparent);
  --newtab-contextual-text-secondary-color: color-mix(in srgb, var(--newtab-contextual-text-primary-color) 70%, transparent);

  // A background color for weather widget to help with wallpaper contrast.
  --newtab-weather-background-color: light-dark(rgba(255, 255, 255, 85%), rgba(66, 65, 77, 85%));

  // --newtab-element-*-color is used when an element needs to be set off from
  // the primary background color.
  --newtab-element-hover-color: color-mix(in srgb, var(--newtab-background-color) 90%, #{$black});
  --newtab-element-active-color: color-mix(in srgb, var(--newtab-background-color) 80%, #{$black});

  // --newtab-button-*-color is used on all new page card/top site options buttons
  --newtab-button-background: var(--button-background-color);
  --newtab-button-focus-background: var(--newtab-button-background);
  --newtab-button-focus-border: var(--focus-outline-color);
  --newtab-button-hover-background: var(--button-background-color-hover);
  --newtab-button-active-background: var(--button-background-color-active);
  --newtab-button-text: var(--button-text-color);

  // --newtab-button-static*-color is used on pocket cards and require a
  // static color unit due to transparency issues with `color-mix`
  --newtab-button-static-background: light-dark(#F0F0F4, #2B2A33);
  --newtab-button-static-focus-background: var(--newtab-button-static-background);
  --newtab-button-static-hover-background: light-dark(#E0E0E6, #52525E);
  --newtab-button-static-active-background: light-dark(#CFCFD8, #5B5B66);

  // --newtab-element-secondary*-color is used when an element needs to be set
  // off from the secondary background color.
  --newtab-element-secondary-color: color-mix(in srgb, currentColor 5%, transparent);
  --newtab-element-secondary-hover-color: color-mix(in srgb, currentColor 12%, transparent);
  --newtab-element-secondary-active-color: color-mix(in srgb, currentColor 25%, transparent);

  --newtab-primary-element-hover-color: color-mix(in srgb, var(--newtab-primary-action-background) 90%, #{$black});
  --newtab-primary-element-hover-pocket-color: color-mix(in srgb, var(--newtab-primary-action-background-pocket) 90%, #{$black});
  --newtab-primary-element-active-color: color-mix(in srgb, var(--newtab-primary-action-background) 80%, #{$black});
  --newtab-primary-element-text-color: #{$white};
  // --newtab-primary-action-background-dimmed is used for soft focus borders.
  --newtab-primary-action-background-dimmed: color-mix(in srgb, var(--newtab-primary-action-background) 25%, transparent);
  --newtab-primary-action-background-pocket-dimmed: color-mix(in srgb, var(--newtab-primary-action-background-pocket) 25%, transparent);
  --newtab-border-color: color-mix(in srgb, var(--newtab-background-color) 75%, #{$black});
  --newtab-wordmark-color: light-dark(#{$newtab-wordmark-default-color}, #{$newtab-wordmark-darktheme-color});
  --newtab-status-success: #{$status-green};
  --newtab-status-error: var(--color-red-60);
  --newtab-inner-box-shadow-color: #{$black-10};
  --newtab-section-card-box-shadow-color: rgba(58, 57, 68, 20%);
  --newtab-overlay-color: color-mix(in srgb, var(--newtab-background-color) 85%, transparent);

  // Custom border radius
  --border-radius-large: 16px;

  @include textbox-focus(var(--newtab-primary-action-background));

  // Buttons
  --newtab-button-secondary-color: inherit;

  &[lwt-newtab-brighttext] {
    // We export color-scheme because some addon themes might not work with light-dark and prefers-color-scheme.
    // If we add color-scheme here, we can still use light-dark
    color-scheme: dark;
    // General styles
    --newtab-background-color: #{$in-content-page-background-dark};
    --newtab-background-color-secondary: #{$newtab-background-secondary-dark};
    --newtab-text-primary-color: #{$in-content-page-color-dark};
    // Card Background includes 20% transparency
    --newtab-background-card: #{$newtab-background-card-dark};
    --newtab-text-topic-label-color: var(--color-violet-30);
    --newtab-text-secondary-text: #FBFBFEB0;

    --newtab-contextual-text-primary-color: light-dark(#{$in-content-page-color}, var(--newtab-text-primary-color));
    --newtab-primary-action-background-pocket: #{$primary-blue-dark};
    --newtab-primary-action-background-pocket-dimmed: color-mix(in srgb, var(--newtab-primary-action-background) 25%, transparent);

    --newtab-primary-element-hover-color: color-mix(in srgb, var(--newtab-primary-action-background) 55%, #{$white});
    --newtab-primary-element-hover-pocket-color: color-mix(in srgb, var(--newtab-primary-action-background-pocket) 55%, #{$white});

    --newtab-element-hover-color: color-mix(in srgb, var(--newtab-background-color) 80%, #{$white});
    --newtab-element-active-color:  color-mix(in srgb, var(--newtab-background-color) 60%, #{$white});
    --newtab-section-card-box-shadow-color: rgba(0, 0, 0, 80%);
    --newtab-element-secondary-color: color-mix(in srgb, currentColor 10%, transparent);
    --newtab-element-secondary-hover-color: color-mix(in srgb, currentColor 17%, transparent);
    --newtab-element-secondary-active-color: color-mix(in srgb, currentColor 30%, transparent);

    --newtab-border-color: color-mix(in srgb, var(--newtab-background-color) 75%, #{$white});
    --newtab-primary-element-text-color: #{$primary-text-color-dark};
    --newtab-status-success: #{$status-dark-green};
  }
}

@media (prefers-contrast) {
  :root {
    --newtab-text-secondary-color: var(--newtab-text-primary-color);
    --newtab-text-topic-label-color: var(--color-violet-30);

    color-scheme: light;
    --newtab-text-secondary-text: #000;

  }

  @media (prefers-color-scheme: dark) {
    :root {
      color-scheme: dark;
      --newtab-text-secondary-text: #FFF;
    }
  }
}
