* {
  font-family: sans-serif;
  color: white;
  text-align: center;
  margin: 0;
  padding: 0;
  background: dimgrey;
  border: none;
}

.screen {
  max-width: 350px;
  margin: auto;
}

.hidden {
  display: none;
}

h1, h2, h3 {
  margin-top: 40px;
  margin-bottom: 10px;
}

input, select {
  width: 100%;
  padding: 12px;
  margin-top: 8px;
  font-size: 16px;
  border: solid 1px;
  border-radius: 5px;
  box-sizing: border-box;
}

button {
  background: #333;
  width: 100%;
  padding: 12px;
  margin-top: 8px;
  font-size: 16px;
  border-radius: 5px;
  box-sizing: border-box;
}

select {
  height: 40px;
}

button.link {
  background: none;
  color: #333;
  text-decoration: underline;
}

.balance {
  font-size: 32px;
  font-weight: bold;
  margin: 16px 0;
}

.msg {
  margin-top: 12px;
  color: red;
}

#log {
  margin-bottom: 50px;
}

.bottom-log {
  margin-top: 40px;
}

details {
  margin-bottom: 12px;
  text-align: left;
}

summary {
  cursor: pointer;
  padding: 10px;
  border: 1px solid white;
  border-radius: 5px;
  list-style: none;
}

details > div {
  max-height: 280px;
  overflow-y: auto;
  padding: 8px;
}

#log div,
#kid-log div {
  font-size: 13px;
  line-height: 1.4;
}