:root {
  --bg: #f7f3ed;
  --surface: rgba(255, 252, 247, 0.84);
  --surface-strong: #fffdf9;
  --text: #2d2a26;
  --muted: #706860;
  --line: rgba(61, 53, 45, 0.12);
  --line-strong: rgba(61, 53, 45, 0.18);
  --accent: #b68f67;
  --accent-deep: #9d7857;
  --accent-soft: #e6d7c7;
  --accent-tint: #f3e7da;
  --shadow: 0 18px 45px rgba(103, 88, 74, 0.08);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --transition: 260ms ease;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Outfit", "PingFang SC", "Helvetica Neue", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(242, 227, 208, 0.8), transparent 32%),
    radial-gradient(circle at bottom right, rgba(222, 232, 223, 0.72), transparent 28%),
    var(--bg);
}

button {
  font: inherit;
}

.app-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  padding: 20px 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ambient {
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  filter: blur(18px);
  opacity: 0.45;
  pointer-events: none;
}

.ambient-left {
  top: -50px;
  left: -65px;
  background: rgba(230, 214, 193, 0.75);
}

.ambient-right {
  right: -70px;
  bottom: -50px;
  background: rgba(210, 224, 215, 0.72);
}

.app-card {
  position: relative;
  width: min(100%, 460px);
  min-height: min(86vh, 760px);
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: var(--radius-lg);
  background: var(--surface);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.screen {
  display: none;
  opacity: 0;
  transform: translateY(10px);
}

.screen.is-active {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  opacity: 1;
  transform: translateY(0);
  animation: fade-up 320ms ease;
}

.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.title {
  margin: 12px 0 10px;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(2rem, 8vw, 2.8rem);
  line-height: 1.15;
  font-weight: 500;
}

.subtitle {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--muted);
}

.intro-grid,
.question-panel,
.result-card {
  width: 100%;
}

.intro-hero {
  text-align: center;
}

.intro-title {
  margin-top: 14px;
  margin-bottom: 10px;
  font-size: clamp(1.72rem, 6.2vw, 2.18rem);
  font-weight: 700;
  font-family: "Outfit", "PingFang SC", "Helvetica Neue", sans-serif;
  line-height: 1.25;
  color: #4e3b2b;
}

.intro-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 22px;
  border-radius: 999px;
  background: linear-gradient(180deg, #f1e3d2, var(--accent-tint));
  color: var(--accent-deep);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.intro-lead {
  margin: 0 0 4px;
  font-size: clamp(0.96rem, 3.7vw, 1.08rem);
  line-height: 1.2;
  white-space: nowrap;
  color: #4e3b2b;
}

.intro-feature-card,
.intro-footer-card,
.question-panel,
.result-card {
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

.intro-grid {
  margin: 20px 0 14px;
  display: grid;
  gap: 10px;
}

.intro-feature-card {
  display: flex;
  gap: 14px;
  padding: 16px 16px;
  align-items: flex-start;
}

.intro-feature-dot {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 7px;
  border-radius: 999px;
  background: radial-gradient(circle at center, #d7b492 0 45%, #f4e7d9 46% 100%);
  box-shadow: 0 0 0 7px rgba(244, 231, 217, 0.9);
}

.intro-feature-title {
  margin: 0 0 5px;
  font-size: 1.02rem;
  line-height: 1.25;
  font-weight: 700;
  color: #4e3b2b;
}

.intro-feature-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.intro-footer-card {
  padding: 16px;
}

.intro-footer-text {
  margin: 0;
}

.science-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.6;
}

.intro-footer-note {
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.intro-meta {
  margin: 12px 0 0;
  text-align: center;
  color: #9a9289;
  font-size: 0.88rem;
  letter-spacing: 0.02em;
}

.primary-button,
.secondary-button,
.option-button {
  width: 100%;
  border: none;
  border-radius: var(--radius-sm);
  transition:
    transform var(--transition),
    background var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.primary-button,
.secondary-button {
  min-height: 54px;
  padding: 14px 18px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
}

.primary-button {
  margin-top: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fffaf4;
  box-shadow: 0 14px 30px rgba(164, 127, 91, 0.24);
}

.secondary-button {
  background: #f2ece4;
  color: var(--text);
  border: 1px solid var(--line);
}

.primary-button:active,
.secondary-button:active,
.option-button:active {
  transform: scale(0.985);
}

.progress-header {
  margin-bottom: 18px;
}

.progress-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(182, 143, 103, 0.14);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #cfb496, #b58f6a);
  transition: width 240ms ease;
}

.question-panel {
  padding: 18px;
  min-height: 420px;
}

.question-title {
  margin: 0 0 20px;
  font-size: 1.08rem;
  line-height: 1.4;
  font-weight: 600;
}

.options-list {
  display: grid;
  gap: 12px;
}

.option-button {
  padding: 16px;
  text-align: left;
  background: #fcfaf6;
  border: 1px solid var(--line);
  color: var(--text);
  cursor: pointer;
}

.option-button:hover {
  background: #f7f1e9;
  border-color: var(--line-strong);
}

.option-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin-right: 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #7b5f46;
  font-size: 0.88rem;
  font-weight: 600;
}

.option-text {
  display: inline;
  vertical-align: middle;
  color: var(--muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

.quiz-actions {
  margin-top: 14px;
}

.previous-button {
  min-height: 48px;
  font-size: 0.95rem;
}

.result-title {
  margin-bottom: 8px;
  text-align: center;
  font-family: "Outfit", "PingFang SC", "Helvetica Neue", sans-serif;
  line-height: 1.4;
  font-weight: 600;
  color: var(--accent-deep);
  white-space: nowrap;
}

.result-card {
  margin-top: 26px;
  padding: 18px;
  display: grid;
  gap: 14px;
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.result-label,
.result-note {
  color: var(--muted);
}

.result-value {
  font-size: 1.02rem;
}

.result-note {
  margin: 18px 0 0;
  line-height: 1.7;
}

.result-content {
  margin-top: 22px;
  display: grid;
  gap: 16px;
}

.result-section {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 253, 249, 0.72);
}

.result-section-title {
  margin: 0 0 10px;
  font-size: 0.96rem;
  font-weight: 600;
}

.result-paragraph {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

.result-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 0.95rem;
}

.result-actions {
  margin-top: auto;
  padding-top: 24px;
}

.result-science-note {
  margin-top: 18px;
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 768px) {
  .app-shell {
    padding: 32px 20px;
  }

  .app-card {
    padding: 24px;
  }

  .question-panel {
    min-height: 470px;
    padding: 22px;
  }
}