:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --ink: #1c1b1a;
  --muted: #6f6b66;
  --line: #e6e3de;
  --accent: #6b5b95;
  --accent-ink: #ffffff;
  --radius: 10px;
  --serif: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial,
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131211;
    --surface: #1b1a18;
    --ink: #ece9e4;
    --muted: #9a9590;
    --line: #302e2b;
    --accent: #b3a3e0;
    --accent-ink: #131211;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

.header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.header h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 2.4rem;
  letter-spacing: 0.02em;
  margin: 0 0 0.5rem;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2rem;
}

.field {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.field input {
  font-family: var(--sans);
  font-size: 1rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
}

button {
  font-family: var(--sans);
  cursor: pointer;
}

#submit-btn {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.85rem 1rem;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  letter-spacing: 0.01em;
  transition: opacity 0.15s ease;
}

#submit-btn:hover {
  opacity: 0.9;
}

#submit-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.disclaimer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
  margin: 1.25rem 0 0;
}

.hidden {
  display: none !important;
}

.loading {
  text-align: center;
  padding: 3rem 0;
  color: var(--muted);
}

.spinner {
  width: 28px;
  height: 28px;
  margin: 0 auto 1rem;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.error {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
}

.demo-banner {
  text-align: center;
  font-size: 0.8rem;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 6px;
  padding: 0.6rem 1rem;
  margin: 0 0 2rem;
}

.paywall {
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2.2rem 1.8rem;
  margin-bottom: 2.5rem;
  background: var(--surface);
}

.paywall .section-title {
  margin-bottom: 0.8rem;
}

.paywall-desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 32rem;
  margin: 0 auto 1.6rem;
}

.canceled-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 1.4rem;
}

.unlock-btn {
  padding: 0.85rem 1.8rem;
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  letter-spacing: 0.01em;
  transition: opacity 0.15s ease;
}

.unlock-btn:hover {
  opacity: 0.9;
}

.unlock-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.link-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.95rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 0;
  margin-top: 1rem;
}

.result {
  animation: fade-in 0.4s ease;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chart-summary {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.chart-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.chart-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.chart-value {
  font-family: var(--serif);
  font-size: 1.15rem;
}

.overview {
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--ink);
  text-align: center;
  margin: 0 0 2.5rem;
}

.block {
  padding-top: 2.5rem;
  margin-bottom: 2.5rem;
  border-top: 1px solid var(--line);
}

.section-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.3rem;
  text-align: center;
  margin: 0 0 1.4rem;
}

.text-card {
  margin-bottom: 1.3rem;
}

.text-card:last-child {
  margin-bottom: 0;
}

.text-card .label,
.timeline-item .label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.text-card p,
.timeline-item p {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.7;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

@media (min-width: 700px) {
  .timeline {
    flex-direction: row;
    gap: 1.5rem;
  }

  .timeline-item {
    flex: 1;
  }
}

.list-card {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.list-card li {
  position: relative;
  padding-left: 1.3rem;
  font-size: 0.95rem;
  line-height: 1.6;
}

.list-card li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.list-card.risks li::before {
  content: "!";
}

.categories {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.category {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem;
  background: var(--surface);
}

.category h3 {
  margin: 0 0 0.9rem;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.05rem;
}

.category-block {
  margin-bottom: 0.9rem;
}

.category-block:last-child {
  margin-bottom: 0;
}

.category-block .period {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.category-block p {
  margin: 0;
  color: var(--ink);
  font-size: 0.95rem;
}

#new-reading-btn {
  display: block;
  margin: 2.5rem auto 0;
}

@media (max-width: 480px) {
  .wrap {
    padding: 3rem 1.1rem 4rem;
  }

  .chart-summary {
    gap: 1.5rem;
  }
}