style.css

* {
  box-sizing: border-box
}

body {
  color: #222;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  line-height: 1.3;
  margin: 9px;
  max-width: 400px;
}

input, ul {
  margin: 0;
  padding: 0;
}

#add-entry-form {
  /* height: 26px; */
  /* margin-bottom: 9px; */
  border: none;
}

#expansion-list {
  margin-top: 9px;
}

div[data="local-storage"] {
  display: flex;
  border-radius: 3px;
}

div[data="local-storage"]:hover {
  background-color: #3c404314;
}

div[data="local-storage"] input.mark-remove {
  align-self: center;
  margin: 0 5px;
}
div[data="local-storage"] ul.stored-item {
  margin: 1px 0 1px 5px;
  list-style: none;
  flex-grow: 1;
}

div[data="local-storage"] ul.stored-item li {
  padding: 2px 0;
}

.entry-field {
  border: 1px solid #999;
  border-radius: 3px;
  display: inline-block;
  font-size: 13px;
  padding: 1px 5px;
  margin-bottom: 5px;
  vertical-align: top;
  width: 240px;
  height: 26px;
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.1)
}

.entry-field:focus {
  outline: 0;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.15)
}

#options {
  display: flex;
  flex-direction: column;
}

#add-button {
  /* align-items: flex-start; */
}
#remove-entry:enabled {
  background-color: #e06666;
  border: #d73c3c;
  color: #fff;
  
  /* display: inline-block; */
  /* align-items: center; */
}

.btn {
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  display: inline-block;
  font-size: 13px;
  height: 24px;
  padding: 1px 7px;
  width: 100%;
  /* -webkit-user-select: none */
}

.btn:hover {
  background-color: #bbb
}

.btn:focus {
  outline: 0
}

.btn:active {
  outline: 0;
  box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.15)
}

.btn[disabled] {
  pointer-events: none;
  cursor: not-allowed;
  box-shadow: none;
  opacity: 0.6
}

.btn-default {
  background-color: #eee;
  border-color: #ccc;
  color: #222
}

.btn-default:hover {
  background-color: #ddd;
  border-color: #bbb
}

.btn-primary {
  background-color: #48e;
  border-color: #37d;
  color: #fff
}

.btn-primary:hover {
  background-color: #37d;
  border-color: #26c
}