:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #2f2f2f;
  --muted: #5f5f5f;
  --accent: #2f6fed;
  --border: #e4e7ee;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.page__header {
  padding: 16px 0;
}

.logo {
  font-weight: 700;
  letter-spacing: 0.5px;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.06);
}

h1 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 600;
  color: #1f1f1f;
}

h2 {
  margin-top: 18px;
  margin-bottom: 8px;
  font-size: 21px;
  font-weight: 600;
  color: #1f1f1f;
}

p {
  margin: 0 0 10px 0;
  line-height: 1.5;
  color: var(--text);
}

.actions {
  margin-top: 16px;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.05s ease, box-shadow 0.1s ease;
}

.btn:hover {
  box-shadow: 0 8px 18px rgba(47, 111, 237, 0.24);
}

.btn:active {
  transform: translateY(1px);
}

.btn-secondary {
  background: #6c778c;
}

.alert {
  background: #fdecea;
  color: #b13b2e;
  border: 1px solid #f5c6cb;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 12px;
}

.checkbox {
  margin: 12px 0 8px;
}

.checkbox:first-of-type {
  margin-top: 16px;
}

.checkbox + .checkbox {
  margin-top: 10px;
}

.checkbox label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text);
  line-height: 1.45;
}

.checkbox input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
}

.repeat-label {
  color: #3a3a3a;
}

.form-note {
  margin-left: 26px;
  margin-top: 6px;
  color: #5f5f5f;
  font-size: 0.9em;
}

.checkbox .repeat-note {
  color: #b13b2e;
  font-weight: 600;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.form-group input,
textarea {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 14px;
}

.card--compact {
  padding: 20px;
}

.muted-line {
  margin: 0 0 10px 0;
  color: var(--muted);
  font-size: 14px;
}

.finish-card {
  padding: 26px;
}

.finish-result {
  font-size: 16px;
  margin-bottom: 12px;
}

.finish-result__value {
  font-weight: 700;
  color: #1f2a3d;
}

.finish-title {
  margin-top: 18px;
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 600;
  color: #212b3a;
}

.finish-link {
  margin-top: 10px;
  display: flex;
  align-items: center;
  padding: 14px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fafbff;
}

.finish-link__url {
  font-weight: 700;
  font-size: 18px;
  color: #1f2a3d;
  letter-spacing: 0.2px;
  word-break: break-all;
}

.finish-actions {
  margin-top: 18px;
}

.demographics-form input[type="text"] {
  width: 100%;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 14px;
}

.demographics-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 6px;
}

.question {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.question__note {
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.35;
  margin-top: -2px;
}

.option-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.option-list--stacked .radio {
  margin-right: 0;
}

.radio-line {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 2px 0;
}

.compact-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.compact-row select {
  min-width: 110px;
  width: auto;
}

.option-with-input {
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.option-with-input .inline-input {
  display: none;
  width: 220px;
  max-width: 100%;
}

.option-with-input.is-active .inline-input {
  display: inline-block;
}

.is-hidden {
  display: none;
}

.stimuli {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 16px;
}

.stimulus {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 16px;
  align-items: start;
  background: #fafbff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}

.stimulus__image img {
  width: 100%;
  max-width: 320px;
  height: auto;
  display: block;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.stimulus__text p {
  margin: 0;
  color: var(--text);
  white-space: pre-wrap;
}

.questions {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.question__label {
  font-weight: 500;
  margin-bottom: 6px;
  color: #6a7280;
  font-size: 15px;
}

.question__label--muted {
  color: #6a7280;
}

.radio {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 12px;
}

.radio input {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: #fff;
  cursor: pointer;
  position: relative;
  transition: background 120ms ease, border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.radio input:hover {
  border-color: var(--accent);
}

.radio input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.radio input:checked {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(47, 111, 237, 0.12);
  transform: scale(1.02);
}

select {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 14px;
}

.task-heading {
  margin: 0 0 12px 0;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}

.confidence-scale {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 6px;
}

.confidence-scale__labels {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: #1f2a3d;
  font-weight: 600;
  gap: 12px;
  padding: 0 2px;
}

.confidence-scale__label {
  max-width: 180px;
}

.confidence-scale__bar {
  position: relative;
  width: 100%;
  height: 28px;
  display: flex;
  align-items: center;
}

.confidence-scale__track {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: #d8dde8;
  border-radius: 999px;
}

.confidence-scale__ticks {
  position: relative;
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.confidence-scale__tick {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease, box-shadow 120ms ease;
}

.confidence-scale__tick:hover {
  border-color: var(--accent);
}

.confidence-scale__tick.is-active {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(47, 111, 237, 0.12);
  transform: scale(1.02);
}

.confidence-scale__tick:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Info page tweaks */
.info-page {
  padding: 22px;
}

.info-page h1 {
  margin: 0 0 10px 0;
}

.info-section__title {
  margin: 14px 0 6px;
  font-size: 17px;
  font-weight: 600;
  color: #212b3a;
}

.info-subtitle {
  margin: 10px 0 4px;
  font-size: 14.5px;
  font-weight: 600;
  font-style: italic;
  color: #3c4658;
}

.info-page p {
  margin: 0 0 8px 0;
  line-height: 1.45;
  font-size: 15px;
  color: var(--text);
}

.info-list {
  margin: 6px 0 10px 14px;
  padding-left: 14px;
}

.info-list li {
  margin-bottom: 4px;
  line-height: 1.45;
}

/* Страница статистики */
.stats-title {
  margin: 22px 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: #212b3a;
}

.stats-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 14px 0 4px;
}

.stats-tile {
  background: #fafbff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}

.stats-tile__value {
  font-size: 26px;
  font-weight: 700;
  color: #1f2a3d;
  line-height: 1.15;
}

.stats-tile__label {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

.stats-bars {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stats-bar {
  display: grid;
  grid-template-columns: 152px 1fr 96px;
  gap: 10px;
  align-items: center;
  font-size: 14px;
}

.stats-bar__track {
  height: 16px;
  border-radius: 8px;
  background: #eef1f8;
  overflow: hidden;
}

.stats-bar__fill {
  height: 100%;
  background: var(--accent);
  border-radius: 8px;
}

.stats-bar__value {
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: #1f2a3d;
}

.stats-bar__percent {
  font-weight: 400;
  color: var(--muted);
}

.stats-days {
  display: flex;
  align-items: flex-end;
  gap: 6px;
}

.stats-day {
  flex: 1;
}

.stats-day__column {
  display: flex;
  align-items: flex-end;
  height: 72px;
}

.stats-day__bar {
  width: 100%;
  background: var(--accent);
  border-radius: 4px 4px 0 0;
}

.stats-day__label {
  margin-top: 6px;
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.stats-table th {
  text-align: left;
  font-weight: 600;
  font-size: 13px;
  color: #6a7280;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
}

.stats-table td {
  padding: 7px 8px;
  border-bottom: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

.stats-table tr:last-child td {
  border-bottom: 0;
}

.stats-totals {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

@media (max-width: 800px) {
  .stimulus {
    grid-template-columns: 1fr;
  }

  .stimulus__image img {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .finish-link {
    padding: 12px;
  }

  .stats-bar {
    grid-template-columns: 108px 1fr 74px;
    font-size: 13px;
  }

  .stats-table {
    font-size: 13px;
  }

  .stats-table th,
  .stats-table td {
    padding: 6px 4px;
  }
}