:root {
  --bg: #fff;
  --ink: #1c2326;
  --soft: #6a7a7e;
  --card: #fff;
  --line: #c3cfd2;
}
html,
body {
  margin: 0;
  min-height: 100%;
}
body {
  min-height: 100vh;
  min-height: 100svh;
  background: var(--bg);
  color: var(--ink);
  font:
    14px/1.5 Verdana,
    Tahoma,
    "DejaVu Sans",
    sans-serif;
  transition:
    background-color 1.4s ease,
    color 1.4s ease;
}
body.snap {
  transition: none;
}
.survey {
  max-width: 560px;
  margin: 0 auto;
  padding: 40px 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  color: var(--soft);
  font-size: 12px;
  letter-spacing: 1px;
  transition: opacity 1.4s ease;
}
.brand img {
  width: 32px;
  height: 32px;
}
.progress {
  margin: 0 0 8px;
  color: var(--soft);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.card {
  padding: 22px 22px 18px;
  border: 1px solid var(--line);
  background: var(--card);
  transition:
    background-color 1.4s ease,
    border-color 1.4s ease;
}
.question {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: bold;
  line-height: 1.35;
}
.options {
  display: grid;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  border: 0;
}
.options label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.next {
  padding: 6px 16px;
  border: 1px solid #0b2a31;
  border-radius: 3px;
  background: linear-gradient(#2f7d8a, #1f5f6b);
  color: #fff;
  font:
    bold 13px Verdana,
    Tahoma,
    sans-serif;
  cursor: pointer;
}
.next:disabled {
  opacity: 0.45;
  cursor: default;
}

.void,
.final,
.thanks {
  min-height: calc(100vh - 80px);
  min-height: calc(100svh - 80px);
  display: grid;
  place-items: center;
  text-align: center;
}
.final p {
  margin: 0;
  color: #000;
  font:
    bold 30px/1.2 Georgia,
    "Times New Roman",
    serif;
}
.thanks div {
  max-width: 420px;
}
.thanks h1 {
  margin: 0 0 10px;
  font-size: 20px;
}
.thanks p {
  margin: 0 0 18px;
  color: var(--soft);
}
.close {
  display: inline-block;
  padding: 6px 22px;
  border: 1px solid #0b2a31;
  border-radius: 3px;
  background: linear-gradient(#2f7d8a, #1f5f6b);
  color: #fff;
  font-weight: bold;
  text-decoration: none;
}
[hidden] {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {
  body,
  .brand,
  .card {
    transition: none;
  }
}