* { box-sizing: border-box; }

.idbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #fafafa;
  border-bottom: 1px solid #ddd;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  color: #333;
  text-align: right;
  letter-spacing: 0.02em;
}
.idbar strong { font-family: "Courier New", monospace; font-size: 0.95rem; }

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: #000;
  background: #fff;
  line-height: 1.6;
  font-size: 18px;
}

main {
  max-width: 700px;
  margin: 2.5rem auto;
  padding: 0 1rem 4rem;
}

h1 { font-size: 1.8rem; line-height: 1.25; margin: 1.2rem 0 1rem; }
h2 { font-size: 1.35rem; margin: 1.6rem 0 0.6rem; }
h3 { font-size: 1.15rem; margin: 1.4rem 0 0.5rem; }
p  { margin: 0 0 1rem; }

.lead {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
}

.body ul, .body ol { padding-left: 1.4rem; }
.body blockquote {
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 3px solid #444;
  color: #333;
}
.body a { color: #000; }

.muted { color: #555; font-size: 0.9rem; }

.session-id {
  font-family: "Courier New", monospace;
  font-size: 1rem;
  background: #f2f2f2;
  border: 1px solid #ccc;
  padding: 0.3rem 0.5rem;
  display: inline-block;
  user-select: all;
}

button {
  font: inherit;
  font-size: 1rem;
  padding: 0.6rem 1.2rem;
  background: #000;
  color: #fff;
  border: none;
  cursor: pointer;
  margin-top: 1rem;
}
button:hover { background: #333; }

input[type="text"], textarea {
  font: inherit;
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #888;
  background: #fff;
}

fieldset.q {
  border: none;
  padding: 0;
  margin: 0 0 1.6rem;
}
fieldset.q legend {
  font-weight: bold;
  margin-bottom: 0.5rem;
  padding: 0;
}

.opt {
  display: block;
  margin: 0.25rem 0;
  cursor: pointer;
}
.opt input { margin-right: 0.5rem; }

.scale {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.scale-label {
  flex: 0 0 96px;
  font-size: 0.85rem;
  color: #555;
  font-style: italic;
  line-height: 1.3;
}
.scale-label-min { text-align: right; }
.scale-label-max { text-align: left; }
.scale-options {
  flex: 1 1 auto;
  display: flex;
  justify-content: space-between;
}
.scale-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  font-size: 0.9rem;
  cursor: pointer;
  min-width: 1.5rem;
}
.scale-item span { margin-top: 0.15rem; }