:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
}
.container { max-width: 640px; margin: 0 auto; padding: 24px 16px 80px; }
.container.wide { max-width: 1180px; }

header { padding: 24px 0 8px; }
header h1 { font-size: 1.4rem; margin: 0 0 4px; }
header p { color: var(--muted); margin: 0; font-size: 0.95rem; }

.progress { display: flex; gap: 6px; margin: 20px 0; }
.progress .step {
  flex: 1; height: 4px; border-radius: 2px;
  background: var(--border); transition: background 0.2s ease;
}
.progress .step.active { background: var(--primary); }

.card {
  background: var(--card); border-radius: 12px; padding: 24px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06); border: 1px solid var(--border);
}
.card h2 { margin-top: 0; font-size: 1.1rem; }

.field { margin-bottom: 22px; }
.field label.question {
  display: block; font-weight: 600; margin-bottom: 10px; font-size: 0.95rem;
}
.field-help { font-size: 0.82rem; color: var(--muted); margin: -4px 0 10px; }
.required-star { color: var(--danger); }

.followup {
  margin-top: 12px; padding-left: 12px; border-left: 3px solid var(--border);
  animation: followupIn 0.18s ease;
}
@keyframes followupIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
.followup-label {
  display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 8px;
}
.followup-optional { font-style: italic; }
.summary-followup {
  padding-left: 16px; border-left: 3px solid var(--border); margin-left: 2px;
}
.summary-followup .summary-q { font-style: italic; }

.scale { display: flex; gap: 8px; flex-wrap: wrap; }
.scale label {
  flex: 1; min-width: 44px; text-align: center;
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 4px;
  cursor: pointer; font-size: 0.85rem; color: var(--muted);
  transition: all 0.15s ease;
}
.scale input { display: none; }
.scale input:checked + label, .scale label.selected {
  background: var(--primary); color: white; border-color: var(--primary);
}
.scale-caption {
  display: flex; justify-content: space-between;
  font-size: 0.75rem; color: var(--muted); margin-top: 6px;
}

.radio-row { display: flex; gap: 10px; flex-wrap: wrap; }
.radio-row label {
  flex: 1; min-width: 80px; text-align: center;
  border: 1px solid var(--border); border-radius: 8px; padding: 10px;
  cursor: pointer; font-size: 0.9rem;
}
.radio-row input { display: none; }
.radio-row label:has(input:checked) {
  background: var(--primary); color: white; border-color: var(--primary);
}

.checkbox-col { display: flex; flex-direction: column; gap: 8px; }
.checkbox-col label {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
  cursor: pointer; font-size: 0.9rem;
}
.checkbox-col label:has(input:checked) {
  border-color: var(--primary); background: #eff6ff;
}

textarea, input[type=text], input[type=email], input[type=number], input[type=date], select {
  width: 100%; border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px; font-size: 0.92rem; font-family: inherit;
  background: white; color: var(--text);
}
textarea { resize: vertical; min-height: 70px; }

.nav-buttons { display: flex; justify-content: space-between; margin-top: 24px; }
button {
  border: none; border-radius: 8px; padding: 12px 20px;
  font-size: 0.95rem; cursor: pointer; font-weight: 600;
}
button:disabled { opacity: 0.6; cursor: default; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-secondary { background: transparent; color: var(--muted); }
.btn-secondary:hover { color: var(--text); }
.btn-outline { border: 1px solid var(--border); color: var(--text); }

.summary-item { padding: 12px 0; border-bottom: 1px solid var(--border); }
.summary-item:last-child { border-bottom: none; }
.summary-q { font-size: 0.82rem; color: var(--muted); margin-bottom: 4px; }
.summary-a { font-size: 0.95rem; font-weight: 500; white-space: pre-wrap; }
.summary-a .empty { color: var(--muted); font-style: italic; font-weight: 400; }

.section-title {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--primary); margin: 20px 0 6px;
}
.section-title:first-child { margin-top: 0; }

.success { text-align: center; padding: 40px 0; }
.success .checkmark { font-size: 3rem; color: var(--success); }

.error-banner {
  background: #fee2e2; color: var(--danger); padding: 10px 14px;
  border-radius: 8px; font-size: 0.85rem; margin-bottom: 16px; display: none;
}
.required-note { font-size: 0.8rem; color: var(--muted); margin-top: 20px; }
.required-note .required-star { font-weight: 600; }
.field-error {
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 6px;
}
.field.has-error input[type=text],
.field.has-error input[type=email],
.field.has-error input[type=number],
.field.has-error input[type=date],
.field.has-error textarea,
.field.has-error select {
  border-color: var(--danger);
  background: #fef2f2;
}
.field.has-error .scale label,
.field.has-error .radio-row label,
.field.has-error .checkbox-col label { border-color: var(--danger); }

.muted-note { color: var(--muted); font-size: 0.88rem; }
.muted-note.tiny { font-size: 0.8rem; }
.app-version {
  text-align: center; color: var(--muted); font-size: 0.72rem;
  margin-top: 28px; opacity: 0.7;
}

/* --- form index ---------------------------------------------------------- */
.form-list { list-style: none; padding: 0; margin: 0; }
.form-list li { border-bottom: 1px solid var(--border); }
.form-list li:last-child { border-bottom: none; }
.form-list a {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 4px; text-decoration: none; color: var(--text);
}
.form-list a:hover { color: var(--primary); }
.form-list .v { font-size: 0.75rem; color: var(--muted); }