bootstrap/less/fileupload.less

// Fileupload.less
// CSS for file upload button and fileupload widget
// ------------------------------------------------

.btn-file {
  overflow: hidden;
  position: relative;
  vertical-align: middle;
  > input {
    position: absolute;
    top: 0;
    right: 0;
    margin: 0;
    opacity: 0;
    filter: alpha(opacity=0);
    transform: translate(-300px, 0) scale(4);
    font-size: 23px;
    direction: ltr;
    cursor: pointer;
  }
}

.fileupload {
  margin-bottom: 9px;
  display: inline-block;
  .uneditable-input {
    display: inline-block;
    margin-bottom: 0px;
    vertical-align: middle;
    cursor: text;
  }
  .thumbnail {
    overflow: hidden;
    display: inline-block;
    margin-bottom: 5px;
    vertical-align: middle;
    text-align: center;
    > img {
      max-height: 100%;
    }
  }
  .btn {
    vertical-align: middle;
  }
}
.fileupload-exists .fileupload-new,
.fileupload-new .fileupload-exists {
  display: none;
}
.fileupload-inline .fileupload-controls {
  display: inline;
}

.fileupload .uneditable-input {
  white-space: normal;
}

.thumbnail-borderless .thumbnail {
  border: none;
  padding: 0;
  .box-shadow(none);
}

// Not 100% correct, but helps in typical use case
.fileupload-new .input-group .btn-file {
  border-radius: 0 @border-radius-base @border-radius-base 0;
}
.fileupload-new .input-group .btn-file.btn-xs,
.fileupload-new .input-group .btn-file.btn-sm {
  border-radius: 0 @border-radius-small @border-radius-small 0;
}
.fileupload-new .input-group .btn-file.btn-lg {
  border-radius: 0 @border-radius-large @border-radius-large 0;
}

.form-group.has-warning .fileupload {
  .uneditable-input {
    color: @state-warning-text;
    border-color: @state-warning-border;
  }
  .fileupload-preview {
    color: @state-warning-text;
  }
  .thumbnail {
    border-color: @state-warning-border;
  }
}
.form-group.has-error .fileupload {
  .uneditable-input {
    color: @state-danger-text;
    border-color: @state-danger-border;
  }
  .fileupload-preview {
    color: @state-danger-text;
  }
  .thumbnail {
    border-color: @state-danger-border;
  }
}
.form-group.has-success .fileupload {
  .uneditable-input {
    color: @state-success-text;
    border-color: @state-success-border;
  }
  .fileupload-preview {
    color: @state-success-text;
  }
  .thumbnail {
    border-color: @state-success-border;
  }
}


// Input group fixes

.input-group-addon:not(:first-child) {
  border-left: 0;
}