* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: #f8f9fa;
}

.btn {
  display: inline-block;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 0.25rem;
  background-color: #d96d7d;
  color: white;
  cursor: pointer;
  transition: background-color 0.15s;
}

.btn:hover {
  background-color: #e54a83;
}

.popover {
  position: absolute;
  z-index: 1060;
  max-width: 276px;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 0.3rem;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  font-size: 0.875rem;
  text-align: left;
}

.popover-header {
  padding: 0.5rem 0.75rem;
  margin-bottom: 0;
  font-size: 1rem;
  background-color: #f7f7f7;
  border-bottom: 1px solid #ebebeb;
  border-top-left-radius: calc(0.3rem - 1px);
  border-top-right-radius: calc(0.3rem - 1px);
  font-weight: 500;
  color: #212529;
}

.popover-body {
  padding: 0.5rem 0.75rem;
  color: #212529;
}

/* Стрелка снизу, указывает на кнопку */
.popover::before {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 10px 10px 0 10px;
  border-style: solid;
  border-color: rgba(0, 0, 0, 0.2) transparent transparent transparent;
}

.popover::after {
  content: '';
  position: absolute;
  bottom: -9px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 10px 10px 0 10px;
  border-style: solid;
  border-color: #fff transparent transparent transparent;
}