body {
  background-color: var(--bg);
  color: var(--txt);
  overscroll-behavior-y: contain;
}

#main {
  padding: 20px;
  max-width: 500px;
  margin-inline: auto;
}
#main h1 {
  margin-top: 1rem;
}
#main h2 {
  font-size: clamp(1.2rem, 4vw, 1.8rem);
}
#main .form {
  margin-top: 3rem;
}
#main .form .input-up-txt {
  margin-top: 1em;
  font-size: 0.9em;
  font-weight: 500;
}
#main .form p.note {
  margin-top: 1em;
  font-size: 0.75em;
  text-align: center;
  padding-block: 0.5em;
  border-radius: 5px;
}
#main .form .result {
  font-size: 0.9rem;
  text-align: center;
  margin-top: 2em;
  background-color: var(--accent10);
  padding-block: 0.5em;
  border-radius: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.2em;
}
#main .form .result span.inSymbol {
  font-size: 1.7em;
  font-weight: 400;
}
#main .form .result:empty {
  display: none;
}
#main .form .result.err {
  background-color: rgba(240, 0, 0, 0.1333333333);
  color: red;
}
#main .form .bottomTxt {
  font-size: 0.8rem;
  margin-top: 2rem;
  text-align: center;
  color: #555;
}
#main .form .bottomTxt a {
  color: var(--accent);
}
#main .form input[type=text],
#main .form input[type=number] {
  width: 100%;
  padding: 1.2em;
  margin-top: 0.5em;
  outline: none;
  border: 1.5px solid #ddd;
  border-radius: 7px;
  font-size: 0.9em;
  transition: 200ms;
}
#main .form input[type=text]:focus,
#main .form input[type=number]:focus {
  border-color: var(--accent);
}
#main .form input[type=range] {
  width: 100%;
  margin-top: 1em;
  -webkit-appearance: none;
  overflow: hidden;
  border-radius: 100vmax;
}
#main .form input[type=range]::-webkit-slider-runnable-track {
  background-color: #f0f0f0;
}
#main .form input[type=range]::-moz-range-track {
  background-color: #f0f0f0;
}
#main .form input[type=range]::-webkit-slider-thumb {
  height: 13px;
  width: 13px;
  border-radius: 50%;
  border: none;
  aspect-ratio: 1/1;
  outline: none;
  background: var(--accent);
  cursor: pointer;
  box-shadow: calc(-100vmax - 5px) 0 0 100vmax var(--accent);
  -webkit-appearance: none;
}
#main .form input[type=range]::-moz-range-thumb {
  height: 17px;
  width: 17px;
  aspect-ratio: 1/1;
  border: none;
  outline: none;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: calc(-100vmax - 5px) 0 0 100vmax var(--accent), calc(100vmax - 5px) 0 0 100vmax #f0f0f0;
}
#main .form button {
  border: none;
  outline: none;
  padding: 1.1em;
  font-size: 0.9em;
  letter-spacing: 0.2px;
  width: 100%;
  margin-top: 2em;
  border-radius: 7px;
  transition: 200ms;
  background-color: var(--accent);
  font-weight: 600;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
}
#main .form button span.icon {
  font-size: 1.1em;
  margin-left: 0.5em;
}
#main .form button:active {
  scale: 0.97;
}