:root {
  color-scheme: light dark;
  --bg: #f5f6fb;
  --surface: #ffffff;
  --ink: #111427;
  --ink-2: #5a6077;
  --line: #e3e6f1;
  --primary: #4f46e5;
  --primary-ink: #ffffff;
  --accent: #b45309;
  --serif: ui-serif, 'New York', 'Iowan Old Style', Georgia, serif;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --display: ui-rounded, system-ui, -apple-system, 'SF Pro Rounded', 'Segoe UI', Roboto, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d18;
    --surface: #141829;
    --ink: #eef0fa;
    --ink-2: #a2a8c3;
    --line: #2a3050;
    --primary: #8f88ff;
    --primary-ink: #0b0d18;
    --accent: #fbbf24;
  }
}
* {
  box-sizing: border-box;
}
/* Author display rules (e.g. .panel form) must never override the hidden attribute. */
[hidden] {
  display: none !important;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 var(--sans);
  -webkit-text-size-adjust: 100%;
}
a {
  color: var(--primary);
}
h1,
h2,
h3 {
  font-family: var(--display);
  line-height: 1.2;
}
h1 {
  font-size: clamp(2rem, 6vw, 3.4rem);
  margin: 0.2em 0;
}
h1 em {
  color: var(--primary);
}
h2 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
}
.nav {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px max(16px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--ink);
  text-decoration: none;
}
.nav nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.95rem;
}
.nav nav a {
  color: var(--ink-2);
  text-decoration: none;
}
main,
.footer {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}
.hero {
  padding: 64px 0 40px;
  max-width: 760px;
}
.kicker {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.8rem;
}
.lead {
  font-size: 1.15rem;
  color: var(--ink-2);
}
.fine {
  color: var(--ink-2);
  font-size: 0.85rem;
}
.section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}
.steps {
  padding-left: 1.2rem;
  max-width: 760px;
}
.steps li {
  margin: 12px 0;
}
.grid,
.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}
.grid article,
.plan,
.panel {
  padding: 20px;
  border-radius: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
}
.grid h3,
.plan h3 {
  margin-top: 0;
}
.note {
  margin-top: 20px;
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 4px 12px 12px 4px;
}
.plan.featured {
  border: 2px solid var(--primary);
}
.badge {
  display: inline-block;
  margin: 0 0 8px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}
.price {
  font-family: var(--display);
  font-size: 2.4rem;
  margin: 0;
}
.price span {
  font-size: 1rem;
  color: var(--ink-2);
}
.plan ul {
  padding-left: 1.1rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 20px;
  border-radius: 14px;
  border: 1.5px solid transparent;
  font: 600 1rem var(--sans);
  text-decoration: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: var(--primary-ink);
}
.btn-secondary {
  background: var(--surface);
  color: var(--primary);
  border-color: var(--primary);
}
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--line);
}
.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0 8px;
}
.terms {
  margin-top: 16px;
  max-width: 760px;
}
.panel {
  max-width: 480px;
  margin-top: 24px;
  display: grid;
  gap: 10px;
}
.panel form {
  display: grid;
  gap: 10px;
}
label {
  font-weight: 600;
}
input,
select {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
}
.choices {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  border: 0;
}
.choices legend {
  font-weight: 600;
  margin-bottom: 6px;
}
.choices label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
  font-weight: 500;
  cursor: pointer;
}
.choices input {
  width: 18px;
  min-height: 18px;
  height: 18px;
  accent-color: var(--primary);
}
.choices label:has(input:checked) {
  border-color: var(--primary);
}
.check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-weight: 400;
}
.check input {
  width: 22px;
  min-height: 22px;
  height: 22px;
}
.status {
  min-height: 1.5em;
  color: var(--primary);
  font-weight: 600;
}
.faq details {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
}
.footer {
  padding: 32px 16px 48px;
  color: var(--ink-2);
  font-size: 0.9rem;
  border-top: 1px solid var(--line);
}
.doc {
  max-width: 760px;
  padding: 40px 0;
}
.draft {
  padding: 12px 16px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 18%, var(--surface));
  font-weight: 600;
}
@media (max-width: 560px) {
  .nav nav {
    gap: 10px;
    font-size: 0.85rem;
  }
}

/* Family invite page */
.join .panel {
  display: grid;
  gap: 12px;
  margin: 20px 0 28px;
}
.join .code {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(1.5rem, 7vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary);
}
.store-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.join .btn {
  min-height: 48px;
  justify-content: center;
}