haikal/static/scss/theme/helpers/_background.scss

/*-----------------------------------------------
|   Backgrounds
-----------------------------------------------*/
.bg-holder {
  position: absolute;
  width: 100%;
  min-height: 100%;
  top: 0;
  left: 0;
  background-size: cover;
  background-position: center;
  overflow: hidden;
  will-change: transform, opacity, filter;
  backface-visibility: hidden;
  background-repeat: no-repeat;
  z-index: 0;

  &.overlay {
    &:before {
      position: absolute;
      content: '';
      background: rgba(#000, var(--#{$prefix}bg-opacity, 0.25));
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
    }
    [data-bs-theme='dark'] & {
      &.overlay-white {
        &:before {
          background: rgba(white, var(--#{$prefix}bg-opacity, 0.35));
        }
      }
    }
  }

  .bg-video {
    position: absolute;
    display: block;
    z-index: -1;
    top: 0;
    left: 0;
    object-fit: cover;
    height: 100%;
    min-width: 100%;
  }

  .bg-youtube {
    position: absolute !important;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
  }
}

.bg-fixed {
  background-attachment: fixed;
}

.bg-glass {
  background-color: rgba($white, 0.9);
}

.bg-card {
  background-size: contain;
  background-position: right;
  border-top-right-radius: 0.375rem;
  border-bottom-right-radius: 0.375rem;

  [dir='rtl'] & {
    background-position: left;
    transform: scaleX(-1);
    border-top-left-radius: 0.375rem;
    border-bottom-left-radius: 0.375rem;
  }
}

/*-----------------------------------------------
|   Background gradient
-----------------------------------------------*/
.bg-line-chart-gradient {
  background-image: var(--#{$prefix}line-chart-gradient);
  background-position: center;
}
.bg-card-gradient {
  background-image: var(--#{$prefix}card-gradient);
  background-position: center;
}
.bg-progress-gradient {
  background-image: var(--#{$prefix}progress-gradient);
  background-position: center;
}
.bg-auth-circle-shape,
.bg-auth-circle-shape-2 {
  display: none;
  @include media-breakpoint-up(lg) {
    display: block;
  }
}
.bg-auth-circle-shape {
  position: absolute;
  right: -8.75rem;
  top: -5.125rem;
}
.bg-auth-circle-shape-2 {
  position: absolute;
  left: -6.25rem;
  bottom: -2.4375rem;
}
.bg-auth-card-shape {
  background-position: 0 100%;
  @include media-breakpoint-up(md) {
    background-position: 0 133%;
  }
}
@mixin shape($bg-color) {
  position: relative;
  overflow: hidden;
  background-color: $bg-color;
  &:after,
  &:before {
    position: absolute;
    content: '';
    border-radius: 50%;
  }
}

.bg-shape {
  @include shape(var(--#{$prefix}bg-shape-bg));
  &:after {
    background-image: var(--#{$prefix}bg-shape-bg-ltd);
  }
  &:before {
    background-image: var(--#{$prefix}bg-shape-bg-dtl);
  }
}

.bg-circle-shape {
  &:after {
    height: 15.625rem;
    width: 115%;
    left: 32%;
    top: -188%;
  }
  &:before {
    height: 332%;
    width: 45%;
    left: -9%;
    top: 0.5625rem;
  }
}
.modal-shape-header {
  &:before {
    height: 28.9375rem;
    width: 155%;
    right: 23%;
    top: -357%;
  }
  &:after {
    height: 289%;
    width: 45%;
    right: -10%;
    top: 2.5rem;
  }
}
.showcase-page-gradient {
  background: linear-gradient(
    357.7deg,
    #024787 -88.88%,
    rgba(0, 79, 197, 0) 27.93%
  );
}

.bg-transparent-50 {
  background-color: var(--#{$prefix}transparent-50);
}

.bg-product-hover {
  background-color: rgba(#000, 0.7);
}

@each $key, $value in $theme-colors-text {
  .bg-#{$key}-emphasis {
    background-color: var(--#{$prefix}#{$key}-text-emphasis);
  }
}