:root {
  --primary: #5746E3;
  --primary-hover: #4335B8;
  --primary-soft: #F3F1FF;
  --accent: #1D7A8C;
  --bg: #F7F8FB;
  --surface: #FFFFFF;
  --surface-muted: #FAFAFC;
  --border: #E4E7EF;
  --text: #151720;
  --muted: #666B7A;
  --placeholder: #A1A6B5;
  --error: #DC2626;
  --success: #059669;
  --focus: rgba(87, 70, 227, 0.18);
  --shadow: 0 24px 60px -34px rgba(21, 23, 32, 0.42);
  --radius-lg: 16px;
  --radius-md: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  color-scheme: light;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Noto Sans JP", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  padding: 48px 20px;
}

.app-container {
  width: min(100%, 880px);
  min-height: 520px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 52px;
}

.screen {
  display: none;
  flex: 1;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition);
  width: 100%;
}

.screen.active {
  display: flex;
  flex-direction: column;
  opacity: 1;
  transform: translateY(0);
}

.card-header {
  margin-bottom: 28px;
  text-align: left;
}

.eyebrow {
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
}

.test-title {
  color: var(--text);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.35;
  margin-bottom: 10px;
}

.test-subtitle {
  color: var(--muted);
  font-size: 15px;
}

.notice-box {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
  padding: 18px 20px;
}

.notice-box p {
  color: #313443;
  font-size: 14px;
}

.form-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

.form-group label,
.birthdate-fieldset legend {
  color: var(--text);
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.required {
  color: var(--error);
  margin-left: 4px;
}

.form-group input,
.select-field select,
.text-answer {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.form-group input {
  font-size: 15px;
  min-height: 50px;
  padding: 13px 15px;
}

.birthdate-fieldset {
  border: 0;
  min-width: 0;
}

.birthdate-selects {
  display: grid;
  gap: 10px;
  grid-template-columns: 1.4fr 1fr 1fr;
}

.select-field {
  display: grid;
  gap: 6px;
}

.select-field span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.select-field select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 12px) 50%;
  background-repeat: no-repeat;
  background-size: 6px 6px, 6px 6px;
  cursor: pointer;
  font-size: 15px;
  min-height: 50px;
  padding: 13px 38px 13px 15px;
}

.form-group input::placeholder,
.text-answer::placeholder {
  color: var(--placeholder);
}

.form-group input:focus,
.select-field select:focus,
.text-answer:focus {
  background: #FFFFFF;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--focus);
}

.form-group input:-webkit-autofill,
.form-group input:-webkit-autofill:hover,
.form-group input:-webkit-autofill:focus,
.text-answer:-webkit-autofill,
.text-answer:-webkit-autofill:hover,
.text-answer:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--text);
  box-shadow: 0 0 0 1000px #FFFFFF inset, 0 0 0 4px var(--focus);
  transition: background-color 9999s ease-in-out 0s;
}

.test-instructions {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 24px 0;
  padding: 18px 20px;
}

.test-instructions h2 {
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 10px;
}

.test-instructions ul {
  display: grid;
  gap: 7px;
  list-style: none;
}

.test-instructions li {
  color: var(--muted);
  font-size: 13.5px;
  padding-left: 18px;
  position: relative;
}

.test-instructions li::before {
  background: var(--accent);
  border-radius: 999px;
  content: "";
  height: 6px;
  left: 2px;
  position: absolute;
  top: 10px;
  width: 6px;
}

.consent-row {
  align-items: flex-start;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  padding: 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.consent-row:hover {
  border-color: #C9C3FF;
  box-shadow: 0 12px 28px -24px rgba(87, 70, 227, 0.55);
}

.consent-row input {
  accent-color: var(--primary);
  flex: 0 0 auto;
  margin-top: 5px;
}

.consent-row span {
  font-size: 14px;
}

.quiz-header {
  margin-bottom: 32px;
}

.quiz-meta {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 14px;
}

.progress-text {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.timer-container {
  align-items: center;
  background: var(--primary-soft);
  border: 1px solid #E3E0FF;
  border-radius: 999px;
  color: #2C2E3A;
  display: flex;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  gap: 8px;
  padding: 7px 14px;
}

.timer-icon {
  color: var(--primary);
  height: 16px;
  width: 16px;
}

.progress-bar-container {
  background: #ECEEF5;
  border-radius: 999px;
  height: 7px;
  overflow: hidden;
  width: 100%;
}

#progress-bar {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 999px;
  height: 100%;
  transition: width var(--transition);
}

.question-container {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.question-container.fade-out {
  opacity: 0;
  transform: translateX(-12px);
}

.question-container.fade-in {
  opacity: 1;
  transform: translateX(0);
}

.question-text {
  color: var(--text);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.65;
  margin-bottom: 24px;
  white-space: pre-line;
}

.text-answer-wrap {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
}

.text-answer {
  font-size: 15px;
  line-height: 1.8;
  min-height: 230px;
  padding: 16px 18px;
  resize: vertical;
}

.answer-hint {
  color: var(--muted);
  font-size: 13px;
}

.quiz-nav {
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 24px;
}

.btn {
  align-items: center;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  justify-content: center;
  min-height: 48px;
  padding: 12px 24px;
  transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
  width: 100%;
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 16px 28px -22px rgba(87, 70, 227, 0.7);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn:disabled,
.btn:disabled:hover {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none;
  box-shadow: none;
}

.btn-secondary {
  background: #FFFFFF;
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  background: var(--primary-soft);
  border-color: #C9C3FF;
}

.loader-container {
  align-items: center;
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  min-height: 300px;
}

.spinner {
  animation: spin 1s linear infinite;
  border: 4px solid rgba(87, 70, 227, 0.12);
  border-left-color: var(--primary);
  border-radius: 50%;
  height: 48px;
  margin-bottom: 20px;
  width: 48px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

#loading-text,
.result-email-info {
  color: var(--muted);
  font-size: 14px;
}

.result-icon-container {
  align-items: center;
  background: rgba(5, 150, 105, 0.1);
  border: 1px solid rgba(5, 150, 105, 0.2);
  border-radius: 999px;
  color: var(--success);
  display: flex;
  height: 64px;
  justify-content: center;
  margin-bottom: 20px;
  width: 64px;
}

.result-icon {
  height: 32px;
  width: 32px;
}

.result-card {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
  padding: 28px;
}

@media (max-width: 640px) {
  body {
    align-items: stretch;
    background: #FFFFFF;
    padding: 0;
  }

  .app-container {
    border: none;
    border-radius: 0;
    box-shadow: none;
    min-height: 100vh;
    padding: 30px 22px;
  }

  .test-title {
    font-size: 27px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .birthdate-selects {
    grid-template-columns: 1fr;
  }

  .quiz-meta {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .quiz-nav {
    gap: 12px;
  }

  .btn {
    padding-inline: 18px;
  }
}