@import url('https://fonts.googleapis.com/css2?family=Noto+Serif:wght@600&family=Manrope:wght@400;600&display=swap');

:root {
  --ink: #101012;
  --paper: #ede8db;
  --paper-full: rgba(237, 232, 219, 1);
  --paper-dim: rgba(237, 232, 219, 0.55);
  --paper-faint: rgba(237, 232, 219, 0.18);
  --paper-disabled: rgba(237, 232, 219, 0.32);
  --ink-raised: rgba(237, 232, 219, 0.06);
  --ink-pressed: rgba(237, 232, 219, 0.14);
  --state-gain: #6bc76b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--ink);
  color: var(--paper-full);
  font-family: 'Manrope', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.eyebrow {
  font-family: 'Manrope', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin: 0 0 8px;
}

h1 {
  font-family: 'Noto Serif', serif;
  font-weight: 600;
  font-size: 32px;
  margin: 0 0 16px;
}

.lede {
  color: var(--paper-dim);
  max-width: 60ch;
}

.intro { margin-bottom: 40px; }

.version-badge {
  font-family: 'Manrope', sans-serif;
  font-size: 12px;
  color: var(--paper-dim);
  margin: -4px 0 8px;
}

.preview-banner {
  border: 1px solid var(--paper-faint);
  padding: 10px 14px;
  margin-bottom: 24px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper-dim);
}

.lang-switch {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-bottom: 24px;
  font-family: 'Manrope', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--paper-dim);
}

.lang-switch a {
  color: var(--paper-dim);
  text-decoration: none;
  padding: 2px 4px;
}

.lang-switch a:hover { color: var(--paper-full); }

.lang-switch a[aria-current="true"] {
  color: var(--paper-full);
  border-bottom: 1px solid var(--paper-full);
}

.stepper {
  margin-bottom: 32px;
}

.stepper-track {
  height: 2px;
  background: var(--paper-faint);
  width: 100%;
}

.stepper-fill {
  height: 100%;
  background: var(--paper-full);
  width: 0%;
  transition: width 0.2s ease;
}

.stepper-label {
  margin: 10px 0 0;
  font-family: 'Manrope', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-dim);
}

.section {
  padding: 0 0 8px;
}

.section.hidden { display: none; }

.section h2 {
  font-family: 'Noto Serif', serif;
  font-weight: 600;
  font-size: 22px;
  margin: 0 0 4px;
}

.question { margin-top: 28px; }

.q-label {
  margin: 0 0 12px;
  font-size: 16px;
}

.q-label .required {
  color: var(--paper-dim);
  margin-left: 2px;
}

.q-optional {
  color: var(--paper-dim);
  font-size: 13px;
  margin-left: 6px;
}

/* Radio list (single choice) */
.radio-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--paper-faint);
}

.radio-list label {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 1px solid var(--paper-faint);
}

.radio-list label:last-child { border-bottom: none; }

.radio-list label:hover { background: var(--ink-raised); }

.radio-list input[type="radio"] {
  accent-color: var(--paper-full);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Likert scale */
.likert {
  display: flex;
  gap: 8px;
}

.likert-option {
  flex: 1;
  position: relative;
}

.likert-option input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}

.likert-option .box {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  border: 1px solid var(--paper-faint);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  color: var(--paper-dim);
}

.likert-option input:hover + .box { background: var(--ink-raised); }
.likert-option input:checked + .box {
  border-color: var(--paper-full);
  color: var(--paper-full);
  background: var(--ink-pressed);
}
.likert-option input:focus-visible + .box { border-color: var(--paper-full); }

.likert-captions {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 12px;
  color: var(--paper-dim);
}

/* Scale 0-10 */
.scale10 {
  display: flex;
  gap: 4px;
}

.scale10 .likert-option .box { height: 40px; font-size: 13px; }

/* Text */
textarea {
  width: 100%;
  background: transparent;
  border: 1px solid var(--paper-faint);
  color: var(--paper-full);
  font-family: 'Manrope', sans-serif;
  font-size: 15px;
  padding: 12px;
  resize: vertical;
  min-height: 64px;
}

textarea:focus { outline: none; border-color: var(--paper-full); }
textarea::placeholder { color: var(--paper-disabled); }

.submit-row {
  border-top: 1px solid var(--paper-faint);
  margin-top: 32px;
  padding-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
}

.nav-buttons {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.btn-primary {
  background: var(--paper-full);
  color: var(--ink);
  border: none;
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 28px;
  cursor: pointer;
  margin-left: auto;
}

.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { opacity: 0.4; cursor: default; }

.btn-secondary {
  background: transparent;
  color: var(--paper-dim);
  border: 1px solid var(--paper-faint);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 15px;
  padding: 14px 28px;
  cursor: pointer;
}

.btn-secondary:hover { color: var(--paper-full); border-color: var(--paper-full); }

.form-error {
  color: #c76b6b;
  font-size: 14px;
  margin: 0;
}

.thanks { padding-top: 48px; }

@media (max-width: 480px) {
  .likert { flex-wrap: wrap; }
  .scale10 { flex-wrap: wrap; }
  .likert-option { min-width: 40px; }
}