body {
  margin: 0;
  font-family: sans-serif;  
  background-color: coral;
}
h1 {
  text-align: center;
}
h2 {
  text-align: center;
  font-size: 18pt;
}
.app {
  display: flex;
  flex-direction: column;
  width: 100%;
  justify-content: space-around;
  align-items: stretch;
}
div {
  flex: 1;
}
button {
   
    padding: 10px;
    margin: 10px;
    font-size: 18pt;
    font-weight: bold;
    border: none;
    border-radius: 14px;
    background: linear-gradient(180deg, #ffffff, #d6d6d6);
    color: #222;
    box-shadow: 0 6px 0 #9a9a9a, 0 8px 14px rgba(0, 0, 0, 0.25);
}
button:active {
  transform: translateY(4px);
  box-shadow: 0 2px 0 #9a9a9a, 0 4px 8px rgba(0, 0, 0, 0.25);
}
#timers {
    margin-top: 10px;
    text-align: center;
    font-size: xx-large;
    display: none;
}
.converter-row {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 320px;
  margin: 10px auto;
}
#product {
  font-size: 15pt;
  flex: 1;
}
#grams {
  font-size: 15pt;
  width: 95px;
}
#product,
#grams {
  padding: 12px;
  font-size: 16px;
  border: 1px solid #d2b48c;
  border-radius: 12px;
  box-sizing: border-box;
}
#convertBtn {
  display: block;
  margin: 14px auto;
}
#convertResult {
  font-size: 20pt;
  text-align: center;
  font-weight: bold;
}
.timerPreset {
  font-size: 15pt;
}