/* Chainy landing page. Tokens and type from the app (docs/design/README.md › Design tokens). */
@font-face { font-family: "Jakarta"; src: url(fonts/PlusJakartaSans-Medium.ttf) format("truetype"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Jakarta"; src: url(fonts/PlusJakartaSans-Bold.ttf) format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Jakarta"; src: url(fonts/PlusJakartaSans-ExtraBold.ttf) format("truetype"); font-weight: 800; font-display: swap; }
@font-face { font-family: "Antonio"; src: url(fonts/Antonio-Bold.ttf) format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Mono"; src: url(fonts/JetBrainsMono-Regular.ttf) format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Mono"; src: url(fonts/JetBrainsMono-Medium.ttf) format("truetype"); font-weight: 500; font-display: swap; }

:root {
  --paper: #F1F0EE; --ink: #111; --night: #0F0F10; --night-ink: #F3F2EF; --red: #FF3B30;
  --ice: #8FD3FF; --pro: #FFD77A; --on-pro: #2A1A00; --sapphire: #4A6DFF;
  --sans: "Jakarta", -apple-system, system-ui, sans-serif;
  --mono: "Mono", ui-monospace, Menlo, monospace;
  --num: "Antonio", "Arial Narrow", sans-serif;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--red); }
img { display: block; max-width: 100%; }
h1, h2, p { margin: 0; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; border-radius: 8px; }

.wrap { max-width: 1120px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.section { padding-top: clamp(80px, 11vw, 140px); }
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 360px), 1fr)); gap: 56px; align-items: center; }
.stack { display: flex; flex-direction: column; gap: 18px; max-width: 460px; }

/* Type */
.eyebrow { font: 500 11px var(--mono); letter-spacing: .18em; color: var(--red); text-transform: uppercase; }
.h2 { font: 800 clamp(38px, 5vw, 60px)/1 var(--sans); letter-spacing: -.04em; text-wrap: balance; }
.lead { font: 500 18px/1.55 var(--sans); color: rgba(0, 0, 0, .62); text-wrap: pretty; }
.dark .lead { color: rgba(255, 255, 255, .62); }
.mono-note { font: 400 11px var(--mono); letter-spacing: .14em; color: rgba(0, 0, 0, .5); text-transform: uppercase; }
.dark .mono-note { color: rgba(255, 255, 255, .5); }

/* Nav */
nav { position: sticky; top: 0; z-index: 10; background: rgba(241, 240, 238, .82);
  backdrop-filter: saturate(1.4) blur(16px); -webkit-backdrop-filter: saturate(1.4) blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, .06); }
nav .wrap { padding-top: 14px; padding-bottom: 14px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font: 800 19px var(--sans); letter-spacing: -.02em; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a:not(.pill) { font: 500 14px var(--sans); color: rgba(0, 0, 0, .6); }
.pill { font: 700 14px var(--sans); background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 20px; }
.pill:hover { background: var(--red); color: #fff; }
@media (max-width: 480px) { .nav-links a:not(.pill) { display: none; } }

/* App Store badge */
.store { display: inline-flex; align-items: center; gap: 10px; background: var(--ink); color: #fff; padding: 14px 22px 14px 18px; border-radius: 16px; transition: background .2s; }
.store:hover { background: var(--red); color: #fff; }
.store svg { width: 22px; height: 26px; }
.store span { display: flex; flex-direction: column; line-height: 1.05; text-align: left; }
.store small { font: 500 11px var(--sans); opacity: .75; }
.store b { font: 700 19px var(--sans); letter-spacing: -.01em; }

/* Hero */
header.hero { padding-top: clamp(48px, 8vw, 96px); display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 48px; align-items: center; }
.hero-copy { display: flex; flex-direction: column; gap: 24px; align-items: flex-start; }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 20px; background: #fff; font: 500 11px var(--mono); letter-spacing: .14em; }
.chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--red); }
h1 { font: 800 clamp(52px, 8.4vw, 104px)/.92 var(--sans); letter-spacing: -.05em; text-wrap: balance; }
h1 em { font-style: normal; color: var(--red); }
.hero-sub { max-width: 440px; font: 500 clamp(17px, 1.6vw, 20px)/1.5 var(--sans); color: rgba(0, 0, 0, .62); text-wrap: pretty; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.hero-cta p { font: 500 14px/1.45 var(--sans); color: rgba(0, 0, 0, .5); }
.hero-phone { display: flex; justify-content: center; }

/* Phones: an anodized rim, a black border, the screen */
.phone { flex: none; border-radius: 54px; padding: 3px; box-shadow: 0 36px 70px rgba(0, 0, 0, .2); }
.phone > div { border-radius: 51px; padding: 8px; background: #040405; }
.phone img { width: 100%; height: auto; border-radius: 43px; }
.phone.silver { background: linear-gradient(135deg, #bfc1c4 0%, #f4f4f5 22%, #c9cbce 50%, #f0f0f1 78%, #a9abaf 100%); box-shadow: 0 40px 80px rgba(0, 0, 0, .18), 0 10px 24px rgba(0, 0, 0, .1); }
.phone.black { background: linear-gradient(135deg, #1c1d20 0%, #4a4c50 22%, #26272a 50%, #45474b 78%, #141517 100%); }
.dark .phone.black { box-shadow: 0 30px 60px rgba(0, 0, 0, .5); }
.w300 { width: min(300px, 70vw); } .w280 { width: min(280px, 66vw); } .w260 { width: min(260px, 62vw); }
#hero-phone { will-change: transform; }

/* Hold-to-forge demo */
.demo { margin-top: 10px; background: #fff; border-radius: 28px; padding: 20px 20px 20px 24px; display: flex; flex-direction: column; gap: 16px; max-width: 420px; }
.demo-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.demo-top strong { display: block; font: 800 17px var(--sans); margin-bottom: 4px; }
#demo-meta { font: 400 10px var(--mono); letter-spacing: .12em; color: var(--red); }
#demo-count { display: inline-block; font: 700 52px/.9 var(--num); transition: transform .35s cubic-bezier(.3, 1.6, .5, 1); }
.links { display: flex; align-items: center; }
.link { width: 48px; height: 22px; border-radius: 11px; border: 5px solid var(--ink); flex: none; }
.link + .link { margin-left: -11px; }
#demo-link { border: 2px dashed var(--red); margin-left: -9px; transition: transform .35s cubic-bezier(.3, 1.6, .5, 1); }
#demo-link.forged { border: 5px solid var(--ink); margin-left: -11px; }
.hold { position: relative; height: 58px; border-radius: 29px; background: var(--ink); color: #fff; overflow: hidden; cursor: pointer;
  user-select: none; -webkit-user-select: none; touch-action: none; display: flex; align-items: center; justify-content: center; border: 0; width: 100%; }
#hold-fill { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--red); }
#hold-label { position: relative; font: 700 21px var(--num); letter-spacing: .08em; }

/* Dark panels */
.panel { background: var(--night); color: var(--night-ink); border-radius: 44px; padding: clamp(36px, 6vw, 72px); overflow: hidden; }
.panel.tension { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 48px; align-items: center;
  background-image: radial-gradient(70% 60% at 80% 30%, #3a0d0a 0%, rgba(15, 15, 16, 0) 70%); }
.panel.milestones { display: flex; flex-direction: column; gap: 48px; background-image: radial-gradient(60% 60% at 75% 20%, #0d1838 0%, rgba(15, 15, 16, 0) 70%); }
.countdown { display: flex; align-items: baseline; gap: 12px; padding-top: 6px; }
#countdown { font: 700 clamp(44px, 5vw, 64px)/1 var(--num); color: var(--red); letter-spacing: .01em; font-variant-numeric: tabular-nums; }
.pair { display: flex; flex-wrap: wrap; justify-content: center; align-items: flex-start; gap: 18px; }
.pair .phone { flex: 1 1 180px; min-width: min(100%, 180px); max-width: 240px; border-radius: 44px; }
.pair .phone > div { border-radius: 41px; padding: 7px; }
.pair .phone img { border-radius: 34px; }

/* Snap */
.ice-row { display: flex; align-items: center; gap: 14px; padding-top: 6px; }
.ice-row .link { width: 52px; height: 24px; border-radius: 12px; border-width: 6px; }
.ice-row .link + .link { margin-left: -12px; }
#ice { border: 5px solid var(--ice); background: rgba(191, 230, 251, .35); }

/* Material ladder */
.ladder { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 96px), 1fr)); border-top: 1px solid rgba(255, 255, 255, .12); }
.step { display: flex; flex-direction: column; gap: 12px; padding: 24px 16px 0 0; }
.step i { width: 44px; height: 20px; border-radius: 10px; border: 5px solid currentColor; }
.step b { font: 700 44px/1 var(--num); }
.step span { font: 400 11px var(--mono); letter-spacing: .14em; color: var(--night-ink); }
.step small { font: 400 10px var(--mono); letter-spacing: .12em; color: rgba(255, 255, 255, .45); }
.step.diamond { color: #fff; } .step.diamond i { box-shadow: 0 0 14px rgba(255, 255, 255, .5); }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 16px; }
.card { background: #fff; border-radius: 28px; padding: 28px; display: flex; flex-direction: column; gap: 10px; }
.card h3 { margin: 0; font: 800 20px var(--sans); letter-spacing: -.02em; }
.card p { font: 500 15px/1.5 var(--sans); color: rgba(0, 0, 0, .6); }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); gap: 16px; align-items: stretch; }
.plan { background: #fff; border-radius: 32px; padding: 32px; display: flex; flex-direction: column; gap: 22px; }
.plan.pro { background: var(--ink); color: var(--night-ink); background-image: radial-gradient(70% 60% at 90% 0%, #3b2a0b 0%, rgba(17, 17, 17, 0) 70%); }
.plan-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.plan-head h3 { margin: 0; font: 800 24px var(--sans); letter-spacing: -.02em; display: flex; align-items: center; gap: 10px; }
.price { font: 700 40px/1 var(--num); }
.plan.pro .price { color: var(--pro); }
.per { font: 400 11px var(--mono); letter-spacing: .12em; color: rgba(255, 255, 255, .55); margin-left: 6px; }
.trial { padding: 5px 9px; border-radius: 10px; background: var(--pro); color: var(--on-pro); font: 500 10px var(--mono); letter-spacing: .12em; }
.plan ul { list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(0, 0, 0, .1); }
.plan li { padding: 14px 0; border-bottom: 1px solid rgba(0, 0, 0, .1); font: 500 15px var(--sans); }
.plan li:last-child { border-bottom: 0; }
.plan.pro ul, .plan.pro li { border-color: rgba(255, 255, 255, .12); }
.plan .mono-note { color: rgba(255, 255, 255, .5); letter-spacing: .12em; }

/* Download */
.cta { background: var(--red); color: #fff; border-radius: 44px; padding: clamp(44px, 7vw, 88px) clamp(28px, 6vw, 72px); display: flex; flex-direction: column; align-items: center; gap: 28px; text-align: center;
  background-image: radial-gradient(80% 80% at 50% 100%, #ff6a5c 0%, rgba(255, 59, 48, 0) 70%); }
#cta-icon { transform-origin: 50% -40px; width: 96px; height: 96px; border-radius: 22px; box-shadow: 0 20px 40px rgba(120, 0, 0, .35); }
.cta h2 { font: 800 clamp(44px, 7vw, 88px)/.95 var(--sans); letter-spacing: -.05em; text-wrap: balance; }
.cta .store:hover { background: #fff; color: var(--ink); }
.cta .mono-note { color: #fff; }

/* Footer */
footer { border-top: 1px solid rgba(0, 0, 0, .08); margin-top: clamp(64px, 8vw, 100px); }
footer .wrap { padding-top: 32px; padding-bottom: 48px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 24px; align-items: flex-start; }
footer .brand { font-size: 16px; } footer .brand img { width: 24px; height: 24px; border-radius: 6px; }
footer p { margin-top: 8px; font: 500 13px var(--sans); color: rgba(0, 0, 0, .5); }
footer nav, .foot-links { position: static; background: none; border: 0; backdrop-filter: none; display: flex; flex-wrap: wrap; gap: 24px; }
.foot-links a { font: 500 14px var(--sans); color: rgba(0, 0, 0, .6); }

/* Reveal on scroll (set up by app.js; nothing is hidden without it) */
.js [data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js [data-reveal="phone"] { transform: translateY(60px) scale(.96); transition: opacity .9s var(--ease), transform 1.2s var(--ease); }
.js .ladder .step { opacity: .18; transform: translateY(14px); transition: opacity .6s ease, transform .6s cubic-bezier(.3, 1.4, .5, 1); }
.js [data-reveal].in, .js .ladder .step.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js [data-reveal], .js .ladder .step { opacity: 1; transform: none; transition: none; }
}

/* Document pages (privacy, support) */
.doc { max-width: 720px; margin: 0 auto; padding: clamp(40px, 7vw, 80px) 24px 40px; }
.doc h1 { font-size: clamp(40px, 6vw, 64px); line-height: 1; margin-bottom: 12px; }
.doc .updated { font: 400 11px var(--mono); letter-spacing: .14em; color: rgba(0, 0, 0, .5); text-transform: uppercase; margin-bottom: 36px; }
.doc h2 { font: 800 22px var(--sans); letter-spacing: -.02em; margin: 36px 0 10px; }
.doc p, .doc li { font: 500 16px/1.6 var(--sans); color: rgba(0, 0, 0, .72); }
.doc p + p { margin-top: 10px; }
.doc ul { padding-left: 20px; margin: 8px 0; }
.doc a { color: var(--red); }
.doc table { width: 100%; border-collapse: collapse; margin: 12px 0; font: 500 14px/1.45 var(--sans); }
.doc th, .doc td { text-align: left; padding: 10px 12px 10px 0; border-bottom: 1px solid rgba(0, 0, 0, .1); vertical-align: top; }
.doc th { font: 500 11px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: rgba(0, 0, 0, .5); }
.lang { display: inline-flex; gap: 6px; margin-bottom: 20px; }
.lang a { font: 500 11px var(--mono); letter-spacing: .12em; padding: 6px 10px; border-radius: 12px; background: #fff; }
.lang a[aria-current] { background: var(--ink); color: #fff; }