/* Leafyear's own design system, as the app states it in Theme.swift:
   one warm gold accent (this year's leaf), serif (New York) for display,
   the system sans for text, capsule actions and radius-28 cards.
   Dark mode is the app's night sky (its launch background).

   Everything is served from this site: no web fonts, scripts or images
   from anywhere else, so reading the privacy policy tells no one. */

:root {
  --bg: #f7f4ec;
  --surface: #ffffff;
  --surface-2: #efe9dc;
  --text: #171b2b;
  --muted: #565d70;
  --rule: #e2ddd0;
  --link: #85570a;
  --gold: #f4c87a;
  --gold-soft: rgba(244, 200, 122, 0.24);
  --gold-ink: #85570a;
  --on-gold: #171b2b;
  --header: rgba(247, 244, 236, 0.82);
  --shadow: 0 1px 2px rgba(23, 27, 43, 0.05), 0 10px 30px rgba(23, 27, 43, 0.07);
  --shadow-phone: 0 2px 6px rgba(23, 27, 43, 0.08), 0 24px 48px rgba(23, 27, 43, 0.18);
  --serif: ui-serif, "New York", "Iowan Old Style", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 28px;
  --radius-sm: 18px;
  --gutter: 16px;
  --header-height: 64px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1224;
    --surface: #161c33;
    --surface-2: #1e2542;
    --text: #e9ecf4;
    --muted: #a4abbf;
    --rule: #283152;
    --link: #f4c87a;
    --gold-soft: rgba(244, 200, 122, 0.14);
    --gold-ink: #f4c87a;
    --header: rgba(13, 18, 36, 0.78);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px rgba(0, 0, 0, 0.3);
    --shadow-phone: 0 2px 6px rgba(0, 0, 0, 0.4), 0 28px 56px rgba(0, 0, 0, 0.5);
  }
}

@media (min-width: 640px) {
  :root { --gutter: 24px; }
}

/* Base */

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 var(--sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { color: var(--link); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px;
}

h1, h2, h3 {
  margin: 0;
  text-wrap: balance;
}
h1, h2 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.25rem, 7vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 1.875rem); }
h3 { font-size: 1.0625rem; font-weight: 600; line-height: 1.35; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

ul { margin: 0 0 1em; padding-left: 1.25rem; }
li + li { margin-top: 6px; }

strong { font-weight: 600; }

.icon {
  width: 1.25em;
  height: 1.25em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: -0.25em;
}

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 20;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--gold);
  color: var(--on-gold);
  font-weight: 600;
  text-decoration: none;
}
.skip:focus { top: 12px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.eyebrow a { color: inherit; text-decoration: none; }
.eyebrow a:hover { color: var(--link); }

.lede {
  font-size: clamp(1.0625rem, 2.4vw, 1.25rem);
  line-height: 1.55;
  color: var(--muted);
  max-width: 38rem;
}

/* Header: the app, the two pages, and the language. */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--rule);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font: 600 1.1875rem/1 var(--serif);
}
.brand img {
  width: 32px;
  height: 32px;
  border-radius: 22.5%;
}

.site-nav {
  display: none;
  gap: 4px;
  margin-left: 12px;
}
.site-nav a {
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }

@media (min-width: 640px) {
  .site-nav { display: flex; }
}

/* The language switch: a segmented control, as in the app's settings. */
.lang {
  display: flex;
  margin-left: auto;
  padding: 3px;
  border-radius: 999px;
  background: var(--surface-2);
  font-size: 0.875rem;
}
.lang a {
  padding: 5px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.lang a:hover { color: var(--text); }
.lang a[aria-current="true"] {
  color: var(--text);
  background: var(--surface);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

/* One language at a time once the script runs; both without it. */
.js [data-lang="vi"] { display: none; }
.js[data-show="vi"] [data-lang="vi"] { display: revert; }
.js[data-show="vi"] [data-lang="en"] { display: none; }
html:not(.js) [data-lang="vi"].chrome { display: none; }

.language-divider {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 80px 0;
}
.js .language-divider { display: none; }

/* Buttons */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: filter 0.15s, background-color 0.15s, border-color 0.15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--gold); color: var(--on-gold); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-ghost { border-color: var(--rule); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--muted); }

/* Support page: the hero and the app's screens. */

.hero {
  padding: clamp(40px, 8vw, 88px) 0 0;
}
.hero h1 { margin-bottom: 20px; }

/* The strip scrolls sideways on a phone; its padding leaves room for the
   phones' shadows, which a scrolling box would otherwise cut off. */
.screens {
  display: flex;
  gap: 20px;
  margin: 16px calc(-1 * var(--gutter)) 0;
  padding: 40px var(--gutter) 56px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}
.screens::-webkit-scrollbar { display: none; }
.screens figure {
  flex: 0 0 min(62vw, 260px);
  margin: 0;
  scroll-snap-align: center;
}
.phone {
  display: block;
  width: 100%;
  aspect-ratio: 660 / 1434;
  border-radius: 13% / 6%;
  border: 1px solid var(--rule);
  box-shadow: var(--shadow-phone);
  background: #0d1224;
}
.screens figcaption {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.9375rem;
  text-align: center;
}
.screens figcaption strong { display: block; color: var(--text); }

@media (min-width: 960px) {
  .screens {
    justify-content: center;
    gap: 28px;
    margin: 64px 0 0;
    padding: 8px 0 80px;
    overflow: visible;
  }
  .screens figure { flex: 0 1 240px; }
  .screens figure:nth-child(even) { transform: translateY(40px); }
}

.section {
  padding: clamp(48px, 8vw, 88px) 0 0;
}
.section-head { max-width: 40rem; margin-bottom: 32px; }
.section-head p { color: var(--muted); margin-top: 12px; }

.features {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .features { grid-template-columns: repeat(3, 1fr); } }

.feature {
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--surface);
}
.feature h3 { margin: 16px 0 6px; }
.feature p { color: var(--muted); font-size: 0.9688rem; }

.badge-icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--gold-soft);
  color: var(--gold-ink);
}
.badge-icon .icon { width: 22px; height: 22px; }

/* Help */

.help {
  display: grid;
  gap: 40px;
}
@media (min-width: 960px) {
  .help { grid-template-columns: 16rem minmax(0, 1fr); gap: 24px 64px; }
  .help-group { display: contents; }
  .help-group > h3 { padding-top: 16px; }
}
.help-group > h3 {
  color: var(--muted);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.faq { border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-right: 4px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: translateY(-2px) rotate(45deg);
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: translateY(2px) rotate(-135deg); }
.faq summary:hover { color: var(--link); }
.faq .answer { padding: 0 0 20px; color: var(--muted); }
.faq .answer strong { color: var(--text); font-weight: 600; }

/* Cards */

.card {
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.contact {
  display: grid;
  gap: 24px;
  align-items: center;
}
.contact h2 { margin-bottom: 8px; }
.contact p { color: var(--muted); }
@media (min-width: 760px) {
  .contact { grid-template-columns: minmax(0, 1fr) auto; gap: 40px; }
}

.privacy-teaser {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.privacy-teaser h2 { font-size: 1.375rem; margin-bottom: 8px; }
.privacy-teaser p { color: var(--muted); }

.more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  text-decoration: none;
}
.more:hover { text-decoration: underline; }
.more .icon { width: 1em; height: 1em; vertical-align: 0; }

/* Privacy policy: a reading column beside its table of contents. */

.policy-head { padding: clamp(40px, 8vw, 80px) 0 32px; max-width: 46rem; }
.policy-head h1 { margin-bottom: 16px; }
.updated {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.policy {
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1fr);
}
@media (min-width: 1080px) {
  .policy { grid-template-columns: 15rem minmax(0, 46rem); gap: 72px; }
}

.toc {
  font-size: 0.9375rem;
}
.toc details {
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.toc summary {
  padding: 14px 20px;
  cursor: pointer;
  font-weight: 600;
}
.toc ol {
  list-style: none;
  margin: 0;
  padding: 0 12px 12px;
  counter-reset: toc;
}
.toc li { margin: 0; counter-increment: toc; }
.toc li a {
  display: flex;
  gap: 10px;
  padding: 6px 8px;
  border-radius: 10px;
  color: var(--muted);
  text-decoration: none;
  line-height: 1.4;
}
.toc li a::before {
  content: counter(toc, decimal-leading-zero);
  color: var(--muted);
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
}
.toc li a:hover { color: var(--text); background: var(--surface-2); }
.toc li a[aria-current="true"] { color: var(--text); background: var(--gold-soft); }

@media (min-width: 1080px) {
  .toc { position: sticky; top: calc(var(--header-height) + 32px); align-self: start; }
  .toc details { border: 0; background: none; }
  .toc summary {
    padding: 0 8px 12px;
    color: var(--muted);
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    list-style: none;
  }
  .js .toc summary { pointer-events: none; }
  .toc summary::-webkit-details-marker { display: none; }
  .toc ol { padding: 0; }
}

/* The policy in four lines, first. */
.glance {
  padding: clamp(24px, 4vw, 36px);
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 10px;
  border-radius: 999px;
  background: var(--gold-soft);
  color: var(--gold-ink);
  font-size: 0.875rem;
  font-weight: 700;
}
.glance-list {
  display: grid;
  gap: 20px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 640px) { .glance-list { grid-template-columns: 1fr 1fr; gap: 24px 28px; } }
.glance-list li { display: flex; gap: 14px; margin: 0; }
.glance-list .icon { width: 22px; height: 22px; margin-top: 2px; color: var(--gold-ink); }
.glance-list p { margin: 2px 0 0; color: var(--muted); font-size: 0.9688rem; line-height: 1.55; }

.prose section { padding-top: 56px; }
.prose h2 {
  display: flex;
  gap: 14px;
  align-items: baseline;
  margin-bottom: 16px;
}
.prose h2 .num {
  font: 600 0.875rem/1 var(--sans);
  color: var(--gold-ink);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}
.prose h3 { margin: 24px 0 8px; }

/* What stays where: one row for each kind of information. */
.data {
  margin: 20px 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  background: var(--surface);
  overflow: hidden;
}
.data > div {
  display: grid;
  gap: 6px 24px;
  padding: 18px 20px;
}
.data > div + div { border-top: 1px solid var(--rule); }
.data dt { font-weight: 600; }
.data dd { margin: 0; color: var(--muted); font-size: 0.9688rem; }
.data .where { display: flex; flex-wrap: wrap; gap: 6px; }
@media (min-width: 640px) {
  .data > div { grid-template-columns: 11rem minmax(0, 1fr); }
  .data .where { grid-column: 2; }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 500;
}
.chip .icon { width: 14px; height: 14px; vertical-align: 0; }

/* Each feature that asks first: when, what for, and how to turn it off. */
.permissions {
  display: grid;
  gap: 16px;
  margin: 24px 0 0;
}
.permission {
  padding: 22px 24px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.permission h3 {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
}
.permission h3 .badge-icon { width: 36px; height: 36px; border-radius: 11px; }
.permission h3 .badge-icon .icon { width: 18px; height: 18px; }
.permission dl { margin: 0; display: grid; gap: 12px; }
.permission dt {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.permission dd { margin: 2px 0 0; font-size: 0.9688rem; }
@media (min-width: 640px) {
  .permission dl > div { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: 16px; }
  .permission dt { padding-top: 3px; }
  .permission dd { margin: 0; }
}

.note {
  margin: 20px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--surface-2);
  font-size: 0.9688rem;
}

.contact-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

/* Footer */

.site-footer {
  margin-top: clamp(64px, 10vw, 120px);
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}
.site-footer .wrap {
  display: grid;
  gap: 24px;
  padding-top: 40px;
  padding-bottom: 48px;
}
@media (min-width: 760px) {
  .site-footer .wrap { grid-template-columns: minmax(0, 1fr) auto; align-items: start; }
}
.site-footer .brand { font-size: 1.0625rem; }
.site-footer .brand img { width: 28px; height: 28px; }
.footer-tagline { margin: 10px 0 0; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-links li { margin: 0; }
.footer-links a { color: var(--text); text-decoration: none; }
.footer-links a:hover { color: var(--link); text-decoration: underline; }
.copyright { grid-column: 1 / -1; margin: 0; font-size: 0.875rem; }

/* Printing the policy gives the words, not the website around them. */
@media print {
  :root { --bg: #fff; --surface: #fff; --surface-2: #f3f3f3; --text: #000; --muted: #333; --rule: #ccc; --link: #000; }
  .site-header, .toc, .skip, .site-nav, .lang, .actions, .screens { display: none !important; }
  .policy { display: block; }
  .glance, .card { box-shadow: none; }
  .site-footer { margin-top: 32px; }
  a { text-decoration: none; }
  .prose section { break-inside: avoid-page; padding-top: 28px; }
}