:root {
  --river: #1b6b8f;
  --river-deep: #0e3a4f;
  --sun: #f4b942;
  --sand: #f7f1e3;
  --ink: #16323d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  background: linear-gradient(180deg, var(--sand) 0%, #dcebef 100%);
  color: var(--ink);
  line-height: 1.55;
}

main {
  max-width: 34rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1 { font-size: 2rem; color: var(--river-deep); margin: 0 0 0.5rem; }
h2 { font-size: 1.2rem; color: var(--river); margin: 2rem 0 0.5rem; }

.question { font-size: 1.3rem; font-style: italic; }
.date { color: var(--river); }
.error { color: #a33; }

ul { padding-left: 1.2rem; }
li { margin-bottom: 0.5rem; }

a { color: var(--river); }

input[type="text"], input[type="number"], input:not([type]), textarea {
  width: 100%;
  padding: 0.6rem;
  font: inherit;
  border: 1.5px solid var(--river);
  border-radius: 6px;
  background: #fff;
}

label { display: block; margin: 0.75rem 0; }

fieldset {
  border: 1.5px solid var(--river);
  border-radius: 6px;
  margin: 0.75rem 0;
}
fieldset label { margin: 0.35rem 0; }
fieldset input[type="radio"] { width: auto; }

button, .button {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.6rem 1.4rem;
  font: inherit;
  color: #fff;
  background: var(--river);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .button:hover { background: var(--river-deep); }

#gate { text-align: center; padding-top: 3rem; }
#gate input { max-width: 16rem; margin: 0 auto 0.5rem; text-align: center; }