/* Layout: single centered column (max 1080px), hero splits text | phone, sections alternate plain and tinted bands */
:root {
  --bg: #F5F8F9;
  --surface: #FFFFFF;
  --band: #EAF2F1;
  --ink: #11262C;
  --muted: #56696F;
  --line: #D9E3E6;
  --green: #3FA463;
  --blue: #3F63D6;
  --sky: #2E9FD8;
  --grad: linear-gradient(100deg, #5BBE77 0%, #3FA7A0 45%, #4A6FE0 100%);
  --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", sans-serif;
  --font-body: "Hind", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-num: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  --radius: 20px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0B1619; --surface: #122228; --band: #0F1E22; --ink: #E7F0F1; --muted: #98ABB0; --line: #23363C;
    --green: #6ACF8A; --blue: #8AA3F2; --sky: #63BFEB; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0B1619; --surface: #122228; --band: #0F1E22; --ink: #E7F0F1; --muted: #98ABB0; --line: #23363C;
  --green: #6ACF8A; --blue: #8AA3F2; --sky: #63BFEB; color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font-body); font-size: 17px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; border-radius: 8px; }

.wrap { max-width: 1080px; margin: 0 auto; padding-inline: 20px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; text-wrap: balance; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.4rem, 6vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0; }
.eyebrow { font-family: var(--font-num); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green); }
.lede { color: var(--muted); font-size: 1.15rem; max-width: 34em; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Header */
.site-head { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; }
.brand img { width: 36px; height: 36px; border-radius: 9px; box-shadow: 0 1px 4px rgba(0,0,0,.12); }
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.98rem; }
.nav a:hover { color: var(--ink); }
.nav .nav-cta { color: var(--surface); background: var(--ink); padding: 7px 16px; border-radius: 999px; }
.nav .nav-cta:hover { color: var(--surface); }
@media (max-width: 720px) { .nav a:not(.nav-cta) { display: none; } }

/* Buttons */
.store-btn { display: inline-flex; align-items: center; gap: 12px; background: var(--ink); color: var(--bg); text-decoration: none; padding: 12px 22px 12px 18px; border-radius: 14px; line-height: 1.15; }
.store-btn svg { width: 26px; height: 26px; fill: currentColor; flex: none; }
.store-btn small { display: block; font-size: 0.72rem; opacity: 0.8; }
.store-btn strong { display: block; font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; }
.launch-note { font-family: var(--font-num); font-size: 0.85rem; color: var(--muted); }

/* Hero */
.hero { padding-block: 56px 72px; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.hero-copy { display: grid; gap: 22px; min-width: 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
@media (max-width: 820px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-block: 36px 56px; } }

.phone { width: min(300px, 78vw); margin: 0 auto; border-radius: 42px; padding: 10px; background: #0E1A1E; box-shadow: 0 30px 60px -25px rgba(17,38,44,.45); }
.phone img { border-radius: 32px; width: 100%; height: auto; }
.phone.sm { width: min(240px, 70vw); border-radius: 36px; padding: 8px; }
.phone.sm img { border-radius: 28px; }

/* Sections */
section { padding-block: 72px; }
.band { background: var(--band); }
.section-head { display: grid; gap: 12px; margin-bottom: 40px; max-width: 40em; }

/* Story + 100 dots */
.story { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.story > * { min-width: 0; }
.story p + p { margin-top: 14px; }
.word { font-family: var(--font-display); font-size: 1.4rem; }
.word span { color: var(--muted); font-family: var(--font-body); font-size: 1rem; }
.steps-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; display: grid; gap: 18px; }
.dots { display: grid; grid-template-columns: repeat(10, 1fr); gap: 8px; }
.dots i { aspect-ratio: 1; border-radius: 50%; background: var(--line); }
.dots i.on { background: var(--green); animation: fill .25s ease both; }
@keyframes fill { from { background: var(--line); transform: scale(.7);} to { transform: scale(1);} }
.steps-meta { display: flex; justify-content: space-between; align-items: baseline; font-family: var(--font-num); font-size: 0.9rem; color: var(--muted); }
.steps-meta b { font-size: 2rem; color: var(--ink); font-weight: 600; }
@media (max-width: 820px) { .story { grid-template-columns: 1fr; } }

/* How it works */
.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; list-style: none; padding: 0; margin: 0; counter-reset: how; }
.how li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: grid; gap: 10px; align-content: start; counter-increment: how; }
.how li::before { content: counter(how); font-family: var(--font-num); font-weight: 600; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: var(--grad); }
.how p { color: var(--muted); }
@media (max-width: 820px) { .how { grid-template-columns: 1fr; } }

/* Features */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.feature + .feature { margin-top: 72px; }
.feature > * { min-width: 0; }
.feature:nth-of-type(even) .feature-shot { order: -1; }
.feature-copy { display: grid; gap: 14px; }
.feature-copy p { color: var(--muted); }
.ticks { list-style: none; padding: 0; margin: 4px 0 0; display: grid; gap: 8px; }
.ticks li { padding-left: 28px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 0.45em; width: 14px; height: 8px; border-left: 2.5px solid var(--green); border-bottom: 2.5px solid var(--green); transform: rotate(-45deg); }
.unit { font-family: var(--font-num); font-size: 0.85em; background: var(--band); padding: 1px 6px; border-radius: 6px; }
@media (max-width: 820px) { .feature { grid-template-columns: 1fr; gap: 28px; } .feature:nth-of-type(even) .feature-shot { order: 0; } }

/* Research */
.research { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.study { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; display: grid; gap: 12px; align-content: start; }
.study .big { font-family: var(--font-num); font-size: 2.4rem; font-weight: 600; line-height: 1; }
.study p { color: var(--muted); }
.study cite { font-style: normal; font-size: 0.88rem; color: var(--muted); }
.note { margin-top: 22px; font-size: 0.92rem; color: var(--muted); max-width: 46em; }
@media (max-width: 820px) { .research { grid-template-columns: 1fr; } }

/* FAQ */
.faq { display: grid; gap: 10px; max-width: 760px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; }
.faq summary { cursor: pointer; font-weight: 600; padding-block: 14px; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-num); color: var(--muted); }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--muted); padding-bottom: 16px; }

/* CTA */
.cta { text-align: center; display: grid; justify-items: center; gap: 18px; }
.cta img { width: 88px; height: 88px; border-radius: 20px; box-shadow: 0 8px 20px -8px rgba(17,38,44,.35); }

/* Footer */
.site-foot { border-top: 1px solid var(--line); padding-block: 32px; font-size: 0.92rem; color: var(--muted); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 16px 32px; justify-content: space-between; align-items: center; }
.site-foot nav { display: flex; gap: 20px; flex-wrap: wrap; }
.site-foot a { color: var(--muted); }
.disclaimer { flex-basis: 100%; font-size: 0.85rem; }

/* Placeholder marker for details still to come */
.todo { background: #FFF1C9; color: #6B4A00; border: 1px dashed #D9A400; padding: 1px 8px; border-radius: 6px; font-size: 0.9em; }

/* Legal / support pages */
.doc { max-width: 760px; padding-block: 48px 72px; }
.doc h1 { font-size: clamp(2rem, 5vw, 2.8rem); margin-bottom: 8px; }
.doc h2 { font-size: 1.4rem; margin: 36px 0 10px; }
.doc p, .doc li { color: var(--ink); }
.doc p + p { margin-top: 12px; }
.doc ul { padding-left: 22px; display: grid; gap: 6px; }
.doc .meta { font-family: var(--font-num); font-size: 0.85rem; color: var(--muted); }
.contact-box { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin-top: 24px; display: grid; gap: 6px; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .dots i.on { animation: none; } }

/* Beta install steps in the download section */
.beta-steps { grid-template-columns: repeat(2, 1fr); max-width: 720px; width: 100%; text-align: left; margin: 8px 0; }
.beta-steps a { justify-self: start; margin-top: 6px; background: var(--ink); color: var(--bg); text-decoration: none; padding: 9px 18px; border-radius: 999px; font-weight: 600; }
@media (max-width: 820px) { .beta-steps { grid-template-columns: 1fr; } }