/* Participant survey surface. Requires ui/tokens.css + ui/base.css +
 * ui/components.css. Focused single-column layout, distraction-free. */

body {
  font-size: 17px;
  /* Faint "focus reader" glow at the top of the participant stage — calm and
     distinctive versus the barren competitor surveys. */
  background-image: radial-gradient(
    60rem 22rem at 50% -8rem,
    var(--we-primary-soft),
    transparent 70%
  );
  background-repeat: no-repeat;
}

.survey-main {
  max-width: 44rem;
  margin: 0 auto;
  padding: var(--we-space-6) var(--we-space-4) var(--we-space-4);
}

/* --- header: brand | step label + page count, progress track below ------- */

.survey-header {
  background: var(--we-surface);
  border-bottom: 1px solid var(--we-border);
}
.survey-header-inner {
  max-width: 44rem;
  margin: 0 auto;
  padding: var(--we-space-3) var(--we-space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--we-space-3);
  flex-wrap: wrap;
}
.survey-brand {
  font-size: var(--we-text-base);
  font-weight: 650;
  letter-spacing: 0.01em;
}
.survey-logo {
  max-height: 2.25rem;
  vertical-align: middle;
}

.survey-footer {
  max-width: 44rem;
  margin: var(--we-space-7) auto var(--we-space-5);
  padding-inline: var(--we-space-4);
  color: var(--we-text-muted);
  font-size: var(--we-text-sm);
}
.survey-footer > * + * {
  margin-top: var(--we-space-3);
}

.test-mode-banner {
  background: var(--we-warning-soft);
  color: var(--we-warning);
  border-bottom: 1px solid color-mix(in srgb, var(--we-warning) 35%, var(--we-border));
  padding: var(--we-space-2) var(--we-space-4);
  text-align: center;
  font-size: var(--we-text-sm);
}

/* --- stimulus ------------------------------------------------------------- */

.stimulus-media {
  margin-bottom: var(--we-space-5);
}
.stimulus-media audio {
  width: 100%;
}
.stimulus-media img {
  display: block;
  margin: 0 auto;
  border-radius: var(--we-radius-md);
}
.stimulus-media blockquote {
  font-size: var(--we-text-lg);
  color: var(--we-text);
  background: var(--we-surface);
  border: 1px solid var(--we-border);
  border-left: 3px solid var(--we-primary);
  border-radius: var(--we-radius-sm);
  padding: var(--we-space-4);
}
.stimulus-html {
  background: var(--we-surface);
  border: 1px solid var(--we-border);
  border-radius: var(--we-radius-md);
  padding: var(--we-space-4);
}
.stimulus-embed iframe {
  width: 100%;
  min-height: 24rem;
  border: 0;
  border-radius: var(--we-radius-md);
  background: var(--we-surface);
}
.stimulus-prompt {
  margin: var(--we-space-4) 0;
  padding: var(--we-space-3) var(--we-space-4);
  background: var(--we-primary-soft);
  border-left: 3px solid var(--we-primary);
  border-radius: var(--we-radius-sm);
}
.stimulus-prompt p {
  margin: 0;
}
.chord-buttons {
  margin-top: var(--we-space-2);
}

/* --- question widgets ------------------------------------------------------ */

form fieldset {
  background: var(--we-surface);
  border: 1px solid var(--we-border);
  border-radius: var(--we-radius-md);
  padding: var(--we-space-4) var(--we-space-5);
  margin-bottom: var(--we-space-4);
}
form fieldset legend {
  float: left; /* keeps the legend inside the box */
  width: 100%;
  margin-bottom: var(--we-space-3);
}
form fieldset legend + * {
  clear: both;
}

.choice-list label {
  display: flex;
  align-items: center;
  gap: var(--we-space-2);
  font-weight: 450;
  padding: var(--we-space-3) var(--we-space-4);
  margin: 0 0 var(--we-space-2);
  border: 1px solid var(--we-border-strong);
  border-radius: var(--we-radius-md);
  cursor: pointer;
  transition: border-color var(--we-transition), background var(--we-transition),
    box-shadow var(--we-transition), transform var(--we-transition);
}
.choice-list label:hover {
  border-color: var(--we-primary-border);
  box-shadow: var(--we-shadow-sm);
  transform: translateY(-1px);
}
.choice-list label:has(input:checked) {
  border-color: var(--we-primary);
  background: var(--we-primary-soft);
  box-shadow: inset 3px 0 0 var(--we-primary);
}

.rating-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--we-space-2) var(--we-space-4);
  align-items: center;
}
.rating-row output {
  display: inline-grid;
  place-items: center;
  min-width: 2.6rem;
  padding: 0.15rem 0.5rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: var(--we-text-lg);
  color: var(--we-primary-contrast);
  background: var(--we-primary);
  background-image: var(--we-primary-gradient);
  border-radius: var(--we-radius-sm);
  box-shadow: var(--we-shadow-sm);
}

/* --- signature range slider (ratings + audio) ----------------------------- */

.rating-row input[type="range"],
input[type="range"].we-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 1.5rem;
  background: transparent;
  cursor: pointer;
}
/* WebKit / Blink */
.rating-row input[type="range"]::-webkit-slider-runnable-track,
input[type="range"].we-slider::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: var(--we-radius-full);
  background: var(--we-surface-2);
  border: 1px solid var(--we-border);
}
.rating-row input[type="range"]::-webkit-slider-thumb,
input[type="range"].we-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  margin-top: -7px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--we-primary);
  background-image: var(--we-primary-gradient);
  border: 3px solid var(--we-surface);
  box-shadow: var(--we-shadow-md);
  transition: box-shadow var(--we-transition), transform var(--we-transition);
}
.rating-row input[type="range"]:hover::-webkit-slider-thumb,
input[type="range"].we-slider:hover::-webkit-slider-thumb {
  transform: scale(1.08);
}
.rating-row input[type="range"]:focus-visible::-webkit-slider-thumb,
input[type="range"].we-slider:focus-visible::-webkit-slider-thumb {
  box-shadow: var(--we-shadow-md), 0 0 0 4px var(--we-primary-glow);
}
/* Firefox */
.rating-row input[type="range"]::-moz-range-track,
input[type="range"].we-slider::-moz-range-track {
  height: 8px;
  border-radius: var(--we-radius-full);
  background: var(--we-surface-2);
  border: 1px solid var(--we-border);
}
.rating-row input[type="range"]::-moz-range-progress,
input[type="range"].we-slider::-moz-range-progress {
  height: 8px;
  border-radius: var(--we-radius-full);
  background: var(--we-primary);
}
.rating-row input[type="range"]::-moz-range-thumb,
input[type="range"].we-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--we-primary);
  border: 3px solid var(--we-surface);
  box-shadow: var(--we-shadow-md);
}
.rating-row input[type="range"]:focus-visible,
input[type="range"].we-slider:focus-visible {
  outline: none;
  box-shadow: none;
}
.rating-scale-labels {
  display: flex;
  justify-content: space-between;
  color: var(--we-text-muted);
  font-size: var(--we-text-sm);
  margin-top: var(--we-space-1);
}

.likert-row {
  display: flex;
  justify-content: space-between;
  gap: var(--we-space-1);
  margin-top: var(--we-space-2);
}
.likert-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  font-size: var(--we-text-xs);
  font-weight: 400;
  color: var(--we-text-muted);
  flex: 1;
  cursor: pointer;
  padding: var(--we-space-2) var(--we-space-1);
  border-radius: var(--we-radius-sm);
}
.likert-option:hover {
  background: var(--we-primary-soft);
}
.likert-option input[type="radio"] {
  margin: 0 0 var(--we-space-1);
}
@media (max-width: 600px) {
  .likert-row {
    flex-wrap: wrap;
  }
  .likert-option {
    min-width: 30%;
  }
}

.numeric-row {
  display: flex;
  align-items: center;
  gap: var(--we-space-2);
}
.numeric-row input {
  max-width: 12rem;
}
.numeric-unit {
  color: var(--we-text-muted);
}

table.matrix-grid th {
  white-space: normal;
}
table.matrix-grid td {
  text-align: center;
}
table.matrix-grid input[type="radio"] {
  margin: 0;
}

.ranking-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--we-space-2);
}
.ranking-item label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--we-space-3);
  font-weight: 400;
  padding: var(--we-space-1) 0;
}
.ranking-item select {
  width: 5.5rem;
}
.ranking-hint {
  color: var(--we-text-muted);
}

.constant-sum-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--we-space-1);
}
.constant-sum-item label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--we-space-3);
  font-weight: 400;
}
.constant-sum-item input[type="number"] {
  width: 6rem;
  margin: var(--we-space-1) 0;
}
.constant-sum-hint {
  color: var(--we-text-muted);
}

.form-actions {
  margin-top: var(--we-space-5);
  display: flex;
  gap: var(--we-space-3);
  align-items: center;
}

/* --- help tooltip ---------------------------------------------------------- */

.help-tooltip {
  position: relative;
  display: inline-block;
  margin-left: 0.4rem;
  vertical-align: middle;
  font-weight: 400;
}
.help-icon {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.2rem;
  height: 1.2rem;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--we-text-faint);
  color: var(--we-text-muted);
  background: transparent;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1;
  cursor: help;
  user-select: none;
}
.help-icon:hover,
.help-icon:focus {
  background: var(--we-primary);
  border-color: var(--we-primary);
  color: var(--we-primary-contrast);
  outline: none;
}
.help-content {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  bottom: calc(100% + 0.4rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 14rem;
  max-width: 22rem;
  width: max-content;
  padding: var(--we-space-2) var(--we-space-3);
  background: var(--we-surface);
  color: var(--we-text);
  border: 1px solid var(--we-border-strong);
  border-radius: var(--we-radius-sm);
  box-shadow: var(--we-shadow-md);
  font-size: var(--we-text-sm);
  font-weight: 400;
  line-height: 1.4;
  text-align: left;
  white-space: normal;
  z-index: var(--we-z-tooltip);
  pointer-events: none;
  transition: opacity 0.12s ease-out;
}
.help-tooltip:hover .help-content,
.help-tooltip:focus-within .help-content {
  visibility: visible;
  opacity: 1;
}
.help-content p:first-child { margin-top: 0; }
.help-content p:last-child { margin-bottom: 0; }

/* --- pairwise comparison ---------------------------------------------------- */

.pairwise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--we-space-5);
  margin-bottom: var(--we-space-5);
}
.pairwise-sample {
  text-align: center;
  background: var(--we-surface);
  border: 1px solid var(--we-border);
  border-radius: var(--we-radius-md);
  padding: var(--we-space-4);
}
.pairwise-sample .sample-label {
  font-size: var(--we-text-lg);
  font-weight: 700;
  margin-bottom: var(--we-space-3);
}
.pairwise-sample audio {
  width: 100%;
}
.pairwise-prompt {
  background: var(--we-surface);
  border: 1px solid var(--we-border);
  border-radius: var(--we-radius-md);
  padding: var(--we-space-4);
  margin-bottom: var(--we-space-4);
  text-align: center;
}
.pairwise-prompt audio {
  width: 100%;
}
@media (max-width: 600px) {
  .pairwise-grid {
    grid-template-columns: 1fr;
    gap: var(--we-space-3);
  }
}

.comparison-table {
  background: var(--we-surface);
  border: 1px solid var(--we-border);
  border-radius: var(--we-radius-md);
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  margin-bottom: var(--we-space-4);
}
.comparison-table thead th {
  text-align: center;
  background: var(--we-surface-2);
}
.comparison-col-header {
  width: 4.5rem;
}
.comparison-attribute {
  font-weight: 500;
}
.comparison-attribute p {
  margin: 0;
}
.comparison-radio {
  text-align: center;
  width: 4.5rem;
}
.comparison-radio input[type="radio"] {
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
  margin: 0;
}

/* --- consent / gate / terminal pages ---------------------------------------- */

.consent-text {
  margin-bottom: var(--we-space-4);
}
.consent-more {
  margin-bottom: var(--we-space-4);
}
.audio-check-clip {
  width: 100%;
  margin-bottom: var(--we-space-4);
}
.completion-code {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--we-space-3);
  background: var(--we-primary-soft);
  border: 1px dashed var(--we-primary-border);
  border-radius: var(--we-radius-md);
  padding: var(--we-space-4);
  margin-bottom: var(--we-space-4);
}
.completion-code code {
  font-size: var(--we-text-xl);
  background: none;
  border: 0;
  letter-spacing: 0.06em;
}
.next-phase {
  margin-top: var(--we-space-5);
}
.resume-box input,
.next-phase input {
  width: 100%;
  font-family: var(--we-font-mono);
  font-size: var(--we-text-sm);
  margin-block: var(--we-space-2);
}
.withdraw-link a {
  color: var(--we-text-faint);
}
.withdraw-link a:hover {
  color: var(--we-danger);
}

/* --- waveform player + audio comparison rack ------------------------------ */

.we-waveform {
  display: flex;
  align-items: center;
  gap: var(--we-space-3);
  width: 100%;
  padding: var(--we-space-3);
  background: var(--we-surface);
  border: 1px solid var(--we-border);
  border-radius: var(--we-radius-md);
  box-shadow: var(--we-shadow-sm);
}
.we-waveform-play {
  flex: none;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  border-radius: 50%;
  font-size: 0.9rem;
}
.we-waveform-canvas {
  flex: 1;
  height: 3rem;
  min-width: 0;
  cursor: pointer;
}
.we-waveform-time {
  flex: none;
  font-variant-numeric: tabular-nums;
  font-size: var(--we-text-sm);
  color: var(--we-text-muted);
  min-width: 5.5ch;
  text-align: right;
}

/* Pairwise "rack": reference / A / B as a coherent panel. */
.pairwise-sample .sample-label {
  display: inline-flex;
  align-items: center;
  gap: var(--we-space-2);
  justify-content: center;
}
.pairwise-sample .sample-label::before {
  content: "";
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  background: var(--we-primary-soft);
  color: var(--we-primary);
  border: 1px solid var(--we-primary-border);
}