body {
  margin: 0;
  background: #fbf8f2;
  color: #182d27;
  font: 17px/1.6 system-ui;
}
main {
  max-width: 620px;
  margin: 5vh auto;
  padding: 26px;
  background: white;
  border: 1px solid #d8c7a8;
  border-radius: 20px;
}
header {
  display: flex;
  align-items: center;
  gap: 20px;
}
.mark {
  width: 90px;
  flex-shrink: 0;
}
svg {
  display: block;
  width: 100%;
}
h1 {
  font:
    34px Georgia,
    serif;
  color: #315b51;
  margin: 0;
}
header p {
  margin: 6px 0;
  color: #496f64;
}
.notice {
  border-left: 5px solid #c89a52;
  padding: 12px;
  background: #fbf8f2;
}
label {
  display: block;
  margin: 15px 0;
}
input {
  display: block;
  box-sizing: border-box;
  width: 100%;
  font: inherit;
  padding: 12px;
  border: 1px solid #496f64;
  border-radius: 8px;
}
button {
  font: inherit;
  font-weight: 600;
  padding: 12px 20px;
  background: #315b51;
  color: white;
  border: 0;
  border-radius: 9px;
  cursor: pointer;
}
button:disabled {
  opacity: 0.6;
}
a {
  color: #315b51;
}
#error {
  color: #812b2b;
}
.small {
  font-size: 14px;
}
@media (max-width: 700px) {
  main {
    margin: 10px;
    padding: 20px;
  }
  .mark {
    width: 65px;
  }
  h1 {
    font-size: 29px;
  }
}