discourse/app/assets/stylesheets/application/modal.css.scss

// base styles for every modal popup used in Discourse

@import "foundation/variables";
@import "foundation/mixins";

.modal-open {
  .dropdown-menu {
     z-index: 2050;
  }
  .dropdown.open {
    *z-index: 2050;
  }
  .popover {
    z-index: 2060;
  }
  .tooltip {
    z-index: 2070;
  }

}

.modal-backdrop {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1040;
  background-color: #000000;
  &.fade {
    opacity: 0;
  }
}

.modal-backdrop,
.modal-backdrop.fade.in {
  opacity: 0.8;
  filter: alpha(opacity=80);
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 1050;
  overflow: auto;
  width: 610px;
  margin: -250px 0 0 -305px;
  background-color: #ffffff;
  border: 1px solid #999;
  border: 1px solid rgba(0, 0, 0, 0.3);
  *border: 1px solid #999;
  /* IE6-7 */

  @include border-radius-all (6px); 
  -webkit-box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
  -moz-box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
  box-shadow: 0 3px 7px rgba(0, 0, 0, 0.3);
  -webkit-background-clip: padding-box;
  -moz-background-clip: padding-box;
  background-clip: padding-box;
}
.modal.fade {
  -webkit-transition: opacity .3s linear, top .3s ease-out;
  -moz-transition: opacity .3s linear, top .3s ease-out;
  -ms-transition: opacity .3s linear, top .3s ease-out;
  -o-transition: opacity .3s linear, top .3s ease-out;
  transition: opacity .3s linear, top .3s ease-out;
  top: -25%;
}
.modal.fade.in {
  top: 50%;
}
.modal-body {
  overflow-y: auto;
  max-height: 400px;
  padding: 15px;
}
.modal-form {
  margin-bottom: 0;
}
.modal-footer {
  margin: 0 15px;
  padding: 14px 0 15px;
  border-top: 1px solid #ddd;
  @include border-radius-all(0 0 6px 6px);
  @include box-shadow (inset 0 1px 0 #ffffff);
  *zoom: 1;
}
.modal-footer:before,
.modal-footer:after {
  display: table;
  content: "";
}
.modal-footer:after {
  clear: both;
}
.modal-footer .btn + .btn {
  margin-left: 5px;
  margin-bottom: 0;
}
.modal-footer .btn-group .btn + .btn {
  margin-left: -1px;
}
.modal-header {
  border-bottom: 1px solid #9baab2;
  @include box-shadow((0 1px 3px rgba($black, 0.12), inset 0 -4px 4px -4px rgba($black, 0.3)));
  h3 {
    color: $nav-pills-background-color-active; 
    font-size: 20px;
    padding: 10px 15px 7px;
  } 
  .close {
    float: right;
    font-size: 20px;
    margin: 10px 10px 0px;
    text-decoration: none;
    color: $modal-close-button-color; 
    cursor: pointer;
    &:hover {
      color: darken($modal-close-button-color,20); 
    }
  }
}

.modal {
  .nav {
    padding: 10px 30px;
    background-color: #e6e6e6;
    li > a {
      font-size: 14px;
    }
    border-bottom: 1px solid #bbb;

  }
  &.hidden {
    display: none;
  }
  .modal-body {
    textarea {
      width: 99%;
      height: 80px;
    }
    label {
      color: $darkish_gray;
    }
    p {
      color: $black;
      font-size: 13px;
    }
    .archetype-option {
      margin-bottom: 20px;
    }
  }
}

#move-selected {
  form {
    margin-top: 20px;
    input[type=text] {
      width: 500px;
    }
  }
}