.btn-block {
   display: block;
   width: 100%;
   padding: 0.375rem 0.75rem;
   font-size: 1rem;
   line-height: 1.5;
   background-image: none;
   border: 1px solid transparent;
   border-radius: 0.25rem;
   transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
   text-align: center;
   vertical-align: middle;
   cursor: pointer;
   user-select: none;
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
   margin-bottom: 0;
   font-weight: 400;
   text-align: center;
}
button.close {
   line-height: 12px;
   padding: 0;
   background-color: transparent;
   border: 0;
   -webkit-appearance: none;
   -moz-appearance: none;
   appearance: none;
}
.close {
   float: right;
   font-size: 1.5rem;
   font-weight: 700;
   line-height: 1;
   color: #000;
   text-shadow: 0 1px 0 #fff;
   opacity: .5;
}
.btn {
   display: inline-block;
   font-weight: 400;
   color: #212529;
   text-align: center;
   vertical-align: middle;
   -webkit-user-select: none;
   -moz-user-select: none;
   -ms-user-select: none;
   user-select: none;
   background-color: transparent;
   border: 1px solid transparent;
   padding: .375rem .75rem;
   font-size: 1rem;
   line-height: 1.5;
   border-radius: .25rem;
   transition: color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}
.btn-outline-secondary {
   color: #6c757d;
   border-color: #6c757d;
}
.btn-primary {
   color: #fff;
   background-color: #007bff;
   border-color: #007bff;
}