nixos-configs/config/ags/scss/widgets/notification-center.scss

.notification-center {
  min-height: 700px;
  min-width: 524px;
  margin-top: 6px;
  margin-right: 60px;
  background: $bg;
  border-radius: 30px;
  border-top-right-radius: 0px;
  border: 2px solid $contrastbg;
  padding: 0px;
  box-shadow: 0 0 4.5px 0 rgba(0, 0, 0, 0.6);
  
  * {
    font-size: 16px;
  }

  .header {
    padding: 10px;
    margin-top: 22px;
    margin-bottom: 9px;
    label {
      font-size: 22px;
    }
    button {
      all: unset;
			transition: 200ms;
			border-radius: 9px;
			color: #eee;
			background-color: #664C90;
			box-shadow: inset 0 0 0 1px rgba(238, 238, 238, 0.03);
			padding: 4.5px 9px;

			&:hover {
				box-shadow: inset 0 0 0 1px rgba(238, 238, 238, 0.03);
				background-color: rgba(238, 238, 238, 0.154);
				color: #f1f1f1;
			}
			&:disabled {
				box-shadow: none;
				background-color: rgba(#664C90, 0.3);
				color: rgba(238, 238, 238, 0.3);
			}
			label {
				font-size: 1.2em;
			}
    }
  }

  .notification-list-box {
    background: $bgfull;
    padding: 0 12px 0 12px;
    border-radius: 30px;
    border-top: 2px solid $contrastbg;
    box-shadow: 0 0 6px 0 rgba(0, 0, 0, 0.5);
		scrollbar {
			all: unset;
			border-radius: 8px;
			border-top-left-radius: 0;
			border-bottom-left-radius: 0;
			* {
				all: unset;
			}
			&:hover {
				border-radius: 8px;
				border-top-left-radius: 0;
				border-bottom-left-radius: 0;
			}
		}
		scrollbar.vertical {
			transition: 200ms;
			background-color: rgba(23, 23, 23, 0.3);
			&:hover {
				background-color: rgba(23, 23, 23, 0.7);
				slider {
					background-color: rgba(238, 238, 238, 0.7);
					min-width: .6em;
				}
			}
			slider {
				background-color: rgba(238, 238, 238, 0.5);
				border-radius: 9px;
				min-width: .4em;
				min-height: 2em;
				transition: 200ms;
			}
		}
  }

  .placeholder {
		color: white;
		image {
	  	font-size: 7em;
			text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.6);
			-gtk-icon-shadow: 2px 2px 2px rgba(0, 0, 0, 0.6);
		}
		label {
			font-size: 1.2em;
			text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.6);
			-gtk-icon-shadow: 2px 2px 2px rgba(0, 0, 0, 0.6);
		}
	}
}