/* The Staks website: the app's own look (warm off-white, near-black ink, chip colors) in the
   phone's built-in font, so there's no font to license or download. Light and dark follow the
   visitor's setting. */
:root {
  --bg: #f5f5f3;
  --surface: #ffffff;
  --muted: #ededea;
  --line: #e4e4e0;
  --ink: #0b0b0c;
  --ink-2: #5f636a;
  /* Dates, the footer and fine print: dark enough to read easily (at least 4.5 to 1). */
  --ink-3: #686c73;
  --link: #0b0b0c;
  --chip-red: #d9474c;
  --chip-green: #1f8e5e;
  --chip-black: #242528;
  --stripe: rgba(255, 255, 255, 0.82);
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
    sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111214;
    --surface: #1b1c1f;
    --muted: #26272b;
    --line: #2e3034;
    --ink: #f2f2f0;
    --ink-2: #b0b4ba;
    --ink-3: #8a8e95;
    --link: #f2f2f0;
    --chip-red: #e0575c;
    --chip-green: #2ba570;
    --chip-black: #3a3c40;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
a:hover {
  text-decoration-thickness: 2px;
}
:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 6px;
}
.skip {
  position: absolute;
  left: -9999px;
  top: 8px;
  background: var(--surface);
  padding: 8px 12px;
  border-radius: 8px;
}
.skip:focus {
  left: 16px;
}

.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left));
  padding-right: max(20px, env(safe-area-inset-right));
}

/* Header */
.site-header {
  padding-top: 20px;
  padding-bottom: 8px;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
}
.site-header nav {
  display: flex;
  gap: 18px;
  font-size: 15px;
}
.site-header nav a {
  text-decoration: none;
  color: var(--ink-2);
}
.site-header nav a:hover,
.site-header nav a[aria-current='page'] {
  color: var(--ink);
}

/* The logo: three chips seen edge on, like the app icon. */
.logo {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  flex: none;
}
.logo span {
  display: block;
  width: 28px;
  height: 8px;
  border-radius: 4px;
  background-image: linear-gradient(
    90deg,
    transparent 14%,
    var(--stripe) 14%,
    var(--stripe) 22%,
    transparent 22%,
    transparent 46%,
    var(--stripe) 46%,
    var(--stripe) 54%,
    transparent 54%,
    transparent 78%,
    var(--stripe) 78%,
    var(--stripe) 86%,
    transparent 86%
  );
}
.logo span:nth-child(1) {
  background-color: var(--chip-red);
}
.logo span:nth-child(2) {
  background-color: var(--chip-green);
}
.logo span:nth-child(3) {
  background-color: var(--chip-black);
}
.logo.big {
  gap: 5px;
}
.logo.big span {
  width: 84px;
  height: 22px;
  border-radius: 11px;
}

main {
  padding-bottom: 48px;
}

/* Home */
.hero {
  padding: 48px 0 24px;
}
.hero h1 {
  margin: 20px 0 6px;
  font-size: clamp(56px, 14vw, 88px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1;
}
.tagline {
  margin: 0;
  font-size: clamp(20px, 4.5vw, 24px);
  color: var(--ink-2);
  text-wrap: balance;
}
.lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 18px;
}
.status {
  display: inline-block;
  margin-top: 22px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 15px;
  font-weight: 600;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.features li {
  background: var(--surface);
  border-radius: 20px;
  padding: 20px;
}
.features h2 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.features p {
  margin: 0;
  color: var(--ink-2);
  font-size: 16px;
}
.dot {
  display: block;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  margin-bottom: 12px;
  background: var(--c);
  position: relative;
}
.dot::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  border: 2px dashed var(--stripe);
}
.red {
  --c: var(--chip-red);
}
.green {
  --c: var(--chip-green);
}
.black {
  --c: var(--chip-black);
}

.fine {
  margin: 28px 0 0;
  font-size: 15px;
  color: var(--ink-3);
  max-width: 62ch;
}

/* Text pages */
.page-title {
  margin: 36px 0 4px;
  font-size: clamp(34px, 8vw, 48px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.05;
}
.updated {
  margin: 0 0 24px;
  color: var(--ink-3);
  font-size: 15px;
}
.prose {
  max-width: 68ch;
}
.prose h2 {
  margin: 32px 0 8px;
  font-size: 21px;
  letter-spacing: -0.01em;
}
.prose p,
.prose ul {
  margin: 0 0 14px;
}
.prose ul {
  padding-left: 22px;
}
.prose li {
  margin-bottom: 6px;
}
.card {
  background: var(--surface);
  border-radius: 20px;
  padding: 20px;
  margin: 0 0 24px;
}
.card p {
  margin: 0;
}
.card .reply-note {
  margin-top: 8px;
  color: var(--ink-3);
  font-size: 15px;
}
.section-title {
  margin: 40px 0 4px;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.email {
  display: inline-block;
  margin-top: 6px;
  font-size: 20px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

/* Questions */
.faq {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 68ch;
}
.faq details {
  background: var(--surface);
  border-radius: 16px;
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer;
  padding: 16px 18px;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: '+';
  color: var(--ink-3);
  font-weight: 400;
  font-size: 22px;
  line-height: 1;
}
.faq details[open] summary::after {
  content: '\2212';
}
.faq .answer {
  padding: 0 18px 4px;
  color: var(--ink-2);
}
.faq .answer p {
  margin: 0 0 12px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 40px;
  font-size: 15px;
  color: var(--ink-3);
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 12px 24px;
  flex-wrap: wrap;
}
.site-footer nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.site-footer a {
  color: var(--ink-2);
}