:root {
  color-scheme: light;
  --bg: #f7f7f9;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --primary: #2a5bd7;
  --primary-text: #ffffff;
  --border: #e0e0e5;
  --danger: #c23b3b;
  --success: #1f8a4c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 18px;
  line-height: 1.4;
}

.participant {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 20px 16px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

h1, h2, h3 {
  margin: 0 0 8px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.notice {
  font-size: 14px;
  color: var(--muted);
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

input[type='text'],
input[type='tel'],
textarea,
select {
  width: 100%;
  font-size: 20px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 14px;
  background: var(--surface);
  color: var(--text);
}

button {
  font-size: 18px;
  padding: 16px 20px;
  border-radius: 10px;
  border: none;
  background: var(--primary);
  color: var(--primary-text);
  cursor: pointer;
  width: 100%;
  min-height: 52px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.option-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-btn {
  text-align: left;
  background: var(--surface);
  color: var(--text);
  border: 2px solid var(--border);
}

.option-btn.selected {
  border-color: var(--primary);
  background: #eaf0ff;
}

.option-btn.correct {
  border-color: var(--success);
  background: #e7f6ec;
}

.option-btn.incorrect {
  border-color: var(--danger);
  background: #fbeaea;
}

.error-text {
  color: var(--danger);
  font-size: 14px;
  min-height: 18px;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.pill {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #eef0f4;
  font-size: 13px;
  color: var(--muted);
}

.multi-item-row {
  margin-bottom: 14px;
}

.multi-item-row .option-list {
  flex-direction: row;
  flex-wrap: wrap;
}

.multi-item-row .option-btn {
  flex: 1;
  min-width: 90px;
  padding: 10px;
  font-size: 15px;
}

.dots-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.dots-row .label {
  flex: 1;
}

.dots-row button {
  width: 44px;
  min-height: 44px;
  padding: 0;
  font-size: 22px;
}

.dots-count {
  width: 28px;
  text-align: center;
  font-weight: 700;
}

.word-input {
  margin-bottom: 10px;
}

.countdown {
  font-size: 22px;
  font-weight: 700;
  color: var(--danger);
  margin: 0 0 10px;
}

.confirm-notice {
  color: var(--success);
  font-weight: 600;
}