/* Rock: the app's design language on the web. Black and white, Geist, colour only for meaning. */

@font-face { font-family: Geist; src: url(/fonts/Geist-Regular.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: Geist; src: url(/fonts/Geist-Medium.woff2) format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: Geist; src: url(/fonts/Geist-SemiBold.woff2) format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Geist Mono"; src: url(/fonts/GeistMono-Regular.woff2) format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --ink: #0d0d0d;
  --secondary: #6b6b6b;
  --tertiary: #8f8f8f;
  --bg: #ffffff;
  --fill: #f4f4f4;
  --hairline: #e5e5e5;
  --on-ink: #ffffff;
  --bezel: #1c1c1e;
  --shadow: 0 30px 60px -20px rgb(0 0 0 / 0.25), 0 12px 24px -12px rgb(0 0 0 / 0.15);
  --radius: 20px;
  --max: 1080px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #ececec;
    --secondary: #a8a8a8;
    --tertiary: #7a7a7a;
    --bg: #212121;
    --fill: #2b2b2b;
    --hairline: #3a3a3a;
    --on-ink: #212121;
    --bezel: #3a3a3c;
    --shadow: 0 30px 60px -20px rgb(0 0 0 / 0.6);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 17px/1.55 Geist, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.02em; line-height: 1.1; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
code, .kicker, .facts, .meta { font-family: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; background: var(--ink); color: var(--on-ink); padding: 8px 14px; border-radius: 999px; z-index: 10; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max); margin: 0 auto; padding: 14px 24px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(16px); backdrop-filter: saturate(180%) blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; font-size: 18px; letter-spacing: -0.01em; }
.mark { width: 26px; height: 26px; border: 1px solid var(--hairline); border-radius: 7px; background: var(--bg); }
.mark path { fill: var(--ink); }
.top nav { display: flex; gap: 22px; font-size: 15px; }
.top nav a { text-decoration: none; color: var(--secondary); }
.top nav a:hover, .top nav a[aria-current] { color: var(--ink); }

/* Hero */
.hero { text-align: center; padding: 72px 0 40px; }
.hero-icon { width: 112px; height: 112px; margin: 0 auto 28px; border-radius: 25px; box-shadow: 0 0 0 1px var(--hairline), 0 18px 40px -16px rgb(0 0 0 / 0.25); }
.hero h1 { font-size: clamp(64px, 11vw, 112px); letter-spacing: -0.045em; line-height: 0.95; }
.tagline { margin-top: 16px; font-size: clamp(22px, 3.2vw, 30px); font-weight: 500; letter-spacing: -0.015em; color: var(--secondary); }
.lead { max-width: 560px; margin: 18px auto 0; color: var(--secondary); }
.cta { margin-top: 32px; display: flex; justify-content: center; }
.store {
  display: inline-flex; flex-direction: column; align-items: flex-start; gap: 1px;
  padding: 11px 26px 12px; border-radius: 999px; background: var(--ink); color: var(--on-ink); text-decoration: none;
  line-height: 1.05; transition: transform .15s ease;
}
.store:hover { transform: translateY(-1px); }
.store-small { font-size: 11px; letter-spacing: 0.01em; opacity: 0.8; }
.store-big { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.store-soon { background: var(--fill); color: var(--ink); box-shadow: inset 0 0 0 1px var(--hairline); }
.facts { margin-top: 26px; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--tertiary); }
.facts li { display: inline-flex; align-items: center; gap: 8px; }
.facts li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--tertiary); }

/* Sections */
.section { padding: 96px 0; }
.section.alt { background: var(--fill); }
.h2 { font-size: clamp(34px, 5vw, 52px); letter-spacing: -0.035em; }
.sub { margin-top: 14px; max-width: 620px; color: var(--secondary); font-size: 19px; }
.h3 { font-size: clamp(28px, 3.4vw, 38px); letter-spacing: -0.03em; }
.kicker { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--tertiary); font-weight: 400; }
.body { margin-top: 14px; color: var(--secondary); font-size: 18px; }

/* Features: text and a phone, alternating sides */
.feature { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 64px; margin-top: 88px; }
.feature.flip .feature-text { order: 2; }
.feature-text .h3 { margin-top: 10px; }
.points { margin-top: 22px; display: grid; gap: 10px; }
.points li { display: flex; gap: 12px; align-items: baseline; }
.points li::before { content: ""; flex: none; width: 14px; height: 1px; background: var(--ink); transform: translateY(-4px); }
.phone {
  margin: 0; justify-self: center; width: min(330px, 100%); padding: 9px; border-radius: 54px;
  background: var(--bezel); box-shadow: var(--shadow);
}
.phone img { border-radius: 45px; width: 100%; }

/* Privacy grid */
.grid { margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid li { background: var(--bg); border: 1px solid var(--hairline); border-radius: var(--radius); padding: 24px; }
.grid h3 { font-size: 18px; letter-spacing: -0.01em; }
.grid p { margin-top: 8px; color: var(--secondary); font-size: 16px; }

/* Models */
.models { margin-top: 48px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; }
.model-list { margin-top: 14px; border: 1px solid var(--hairline); border-radius: var(--radius); overflow: hidden; }
.model-list li { display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; padding: 18px 20px; }
.model-list li + li { border-top: 1px solid var(--hairline); }
.model-list strong { font-weight: 600; }
.model-list span { margin-left: 8px; color: var(--tertiary); font-size: 14px; }
.model-list p { grid-column: 1; color: var(--secondary); font-size: 15px; }
.model-list code { grid-column: 2; grid-row: 1 / span 2; align-self: center; font-size: 14px; color: var(--secondary); }

/* Requirements */
.reqs { margin: 40px 0 0; border-top: 1px solid var(--hairline); }
.reqs div { display: grid; grid-template-columns: 180px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--hairline); }
.reqs dt { font-weight: 500; }
.reqs dd { margin: 0; color: var(--secondary); }

/* FAQ */
.faq { margin-top: 36px; border-top: 1px solid var(--hairline); }
.faq details { border-bottom: 1px solid var(--hairline); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative; font-weight: 500; font-size: 18px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 18px; font-size: 24px; font-weight: 400; color: var(--tertiary); transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 40px 24px 0; color: var(--secondary); }

.end { text-align: center; }
.end .sub { margin-left: auto; margin-right: auto; }

/* Documents: privacy, support */
.doc { padding: 64px 0 24px; }
.h1-doc { margin-top: 10px; font-size: clamp(40px, 6vw, 60px); letter-spacing: -0.04em; }
.meta { margin-top: 12px; font-size: 13px; color: var(--tertiary); }
.doc section { margin-top: 40px; }
.doc h2 { font-size: 22px; letter-spacing: -0.015em; }
.doc section p { margin-top: 12px; color: var(--secondary); }
.doc .body a, .doc section a { color: var(--ink); }

/* Footer */
.foot { border-top: 1px solid var(--hairline); margin-top: 0; }
.foot-inner { max-width: var(--max); margin: 0 auto; padding: 36px 24px 48px; display: flex; flex-wrap: wrap; align-items: center; gap: 16px 32px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: 15px; color: var(--secondary); }
.foot nav a { text-decoration: none; }
.foot nav a:hover { color: var(--ink); }
.legal { margin-left: auto; font-size: 14px; color: var(--tertiary); }

/* Small screens */
@media (max-width: 820px) {
  .feature { grid-template-columns: 1fr; gap: 36px; margin-top: 72px; }
  .feature.flip .feature-text { order: 0; }
  .grid { grid-template-columns: 1fr; }
  .models { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
}
@media (max-width: 520px) {
  .wrap, .top, .foot-inner { padding-left: 16px; padding-right: 16px; }
  .top nav { gap: 16px; }
  .top nav a:first-child { display: none; }
  .hero { padding-top: 48px; }
  .reqs div { grid-template-columns: 1fr; gap: 4px; }
  .legal { margin-left: 0; width: 100%; }
}