:root { color-scheme: light; --paper: #fcfdf9; --ground: #f4f6f2; --ink: #202a23; --forest: #195a40; --leaf: #dbedbd; --quiet: #53664b; --line: #d9e1d4; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 2rem; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; font-size: 17px; line-height: 1.65; }
a { color: var(--forest); text-underline-offset: .24em; }
button, summary { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid #865318; outline-offset: 5px; }
[hidden] { display: none !important; }
.wrap { max-width: 1256px; margin-inline: auto; padding-inline: 48px; }
.skip { position: absolute; left: 16px; top: -80px; z-index: 10; background: var(--paper); padding: 12px 20px; }
.skip:focus { top: 12px; }
.header { min-height: 112px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-size: 30px; font-weight: 750; letter-spacing: -.03em; text-decoration: none; }
.brand img { object-fit: contain; }
nav { display: flex; gap: 30px; align-items: center; }
nav a { text-decoration: none; font-size: 15px; font-weight: 600; padding-block: 12px; }
nav a:hover, .text-link:hover { text-decoration: underline; }
.hero { display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 64px; padding-top: 54px; padding-bottom: 94px; }
.kicker { margin: 0 0 24px; color: var(--forest); font-size: 14px; font-weight: 650; }
.dot { display: inline-block; width: 8px; height: 8px; background: var(--forest); border-radius: 50%; margin-right: 8px; }
h1, h2, h3 { text-wrap: balance; line-height: 1.08; letter-spacing: -.035em; }
h1 { font-size: clamp(3.1rem, 6.2vw, 5.5rem); margin: 0 0 30px; font-weight: 670; }
h1 em { font-style: normal; color: var(--forest); }
h2 { font-size: clamp(2.2rem, 3.8vw, 3.5rem); margin: 0 0 28px; font-weight: 650; }
h3 { font-size: 25px; margin: 16px 0; line-height: 1.2; letter-spacing: -.02em; }
p { max-width: 70ch; margin: 0 0 22px; }
.intro { max-width: 47ch; font-size: 19px; line-height: 1.65; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; margin: 30px 0 22px; }
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; gap: 22px; padding: 15px 24px; border: 0; border-radius: 16px; background: var(--forest); color: var(--paper); text-decoration: none; font-weight: 650; font-size: 15px; line-height: 1.45; transition: background .18s; }
.button:hover { background: #103e2c; }
.button:disabled { cursor: wait; background: #d9e1d4; color: #53664b; }
.text-link { display: inline-block; padding-block: 10px; text-decoration: none; font-size: 15px; font-weight: 600; }
.beta-note, .quiet { color: var(--quiet); font-size: 14px; line-height: 1.65; }
.app-figure { margin: 0; display: flex; flex-direction: column; align-items: center; }
.phone { width: min(310px, 100%); overflow: hidden; border: 8px solid var(--ink); border-radius: 42px; background: var(--paper); transform: rotate(3deg); animation: settle .9s cubic-bezier(.16, 1, .3, 1) both; }
.phone img { display: block; width: 100%; height: auto; }
figcaption { margin-top: 26px; padding-left: 20px; font-size: 14px; color: var(--forest); line-height: 1.6; }
figcaption span:last-child { color: var(--quiet); font-size: 12px; }
.caption-rule { display: inline-block; width: 28px; border-top: 1px solid var(--forest); vertical-align: middle; margin-right: 8px; }
.chapter { padding-top: 94px; padding-bottom: 98px; border-top: 1px solid var(--line); }
.chapter-heading { margin-bottom: 46px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 42px; }
.steps article { border-top: 1px solid var(--forest); padding-top: 23px; }
.step-word { font-size: 14px; color: var(--quiet); }
.steps p { font-size: 16px; }
.utility-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; margin-top: 42px; padding-top: 26px; border-top: 1px solid var(--line); }
.utility-notes p { font-size: 14px; color: var(--quiet); margin: 0; }
.utility-notes strong { display: block; color: var(--ink); margin-bottom: 6px; }
.split-layout { display: grid; grid-template-columns: 1fr 1.12fr; gap: 88px; }
.signal-notes article + article { margin-top: 32px; }
.signal-notes h3 { margin-top: 0; }
.architecture-band { background: var(--forest); color: var(--paper); padding-block: 88px; }
.architecture-heading { display: grid; grid-template-columns: 1fr 1.12fr; gap: 88px; align-items: end; margin-bottom: 48px; }
.architecture-band .kicker, .flow-stage { color: var(--leaf); }
.architecture-band h2 { margin-bottom: 0; }
.architecture-heading .intro { margin-bottom: 0; }
.signal-flow { display: grid; grid-template-columns: repeat(4, 1fr); padding: 0; margin: 0; list-style-position: inside; gap: 0; }
.signal-flow li { padding: 24px 20px 0 0; border-top: 1px solid #7fa68d; }
.signal-flow li + li { padding-left: 20px; border-left: 1px solid #7fa68d; }
.signal-flow li::marker { color: var(--leaf); font-weight: 650; }
.flow-stage { font-size: 13px; }
.signal-flow h3 { font-size: 23px; }
.signal-flow p { font-size: 15px; }
.architecture-foot { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; border-top: 1px solid #7fa68d; margin-top: 30px; padding-top: 24px; }
.architecture-foot p { font-size: 14px; margin-bottom: 0; }
.architecture-foot details { border: 0; }
.architecture-foot summary { padding-top: 0; min-height: 44px; }
.architecture-band :focus-visible { outline-color: var(--leaf); }
.differences { margin: 0; }
.differences div { border-top: 1px solid var(--line); padding: 24px 0; }
.differences dt { font-size: 19px; font-weight: 650; line-height: 1.4; }
.differences dd { margin: 10px 0 0; font-size: 16px; }
.site-privacy { padding-block: 32px; }
.site-privacy h2 { font-size: 20px; margin-bottom: 14px; }
.site-privacy p { max-width: 90ch; color: var(--quiet); font-size: 14px; }
.evidence-band { background: #e4ebde; padding-block: 88px; }
.evidence-layout { display: grid; grid-template-columns: 1fr 1.15fr; gap: 76px; }
.results { padding-top: 6px; }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; margin-bottom: 22px; }
caption { text-align: left; font-weight: 650; color: var(--forest); padding-bottom: 20px; }
th, td { padding: 14px 8px; border-bottom: 1px solid #b8c6ae; text-align: right; }
th:first-child, td:first-child { padding-left: 0; text-align: left; }
th { font-size: 12px; font-weight: 650; }
.release-layout { display: grid; grid-template-columns: 1fr 1.12fr; gap: 88px; border-top: 0; }
.release { background: var(--paper); padding: 32px; border: 1px solid var(--line); border-radius: 16px; align-self: start; }
.release-top { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 12px; margin-bottom: 10px; }
.release h3 { margin: 0; }
.tag { font-size: 12px; font-weight: 600; color: var(--forest); }
#release-meta { color: var(--quiet); font-size: 14px; }
.download { width: 100%; }
.release-warning { margin: 18px 0 22px; font-size: 14px; color: #704717; }
details { border-top: 1px solid var(--line); }
summary { cursor: pointer; padding-block: 16px; font-weight: 600; font-size: 15px; }
details p, details ol { font-size: 14px; }
details ol { padding-left: 22px; }
details li { padding-bottom: 10px; }
code { display: block; overflow-wrap: anywhere; font-size: 12px; margin-bottom: 14px; }
.copy-button { border: 1px solid var(--forest); border-radius: 12px; color: var(--forest); background: transparent; min-height: 44px; padding: 8px 14px; font-size: 14px; }
.copy-button:hover { background: var(--ground); }
.copy-button:disabled { cursor: default; opacity: .55; }
#copy-status { font-size: 13px; margin: 12px 0; }
.participate { display: grid; grid-template-columns: 1fr 1.12fr; gap: 88px; }
.privacy-note { font-size: 14px; color: var(--quiet); margin-top: 24px; }
.footer { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-top: 35px; padding-bottom: 40px; border-top: 1px solid var(--line); }
.footer p { font-size: 12px; color: var(--quiet); margin: 0; max-width: 36ch; }
.footer > a:last-child { font-size: 13px; }
@keyframes settle { from { transform: rotate(0deg) translateY(12px); } to { transform: rotate(3deg) translateY(0); } }
@media (max-width: 960px) { .wrap { padding-inline: 30px; } .hero { gap: 30px; } .phone { width: 270px; } .evidence-layout, .release-layout, .participate, .split-layout, .architecture-heading { gap: 40px; } .steps { gap: 26px; } .signal-flow { grid-template-columns: 1fr 1fr; gap: 24px 0; } .signal-flow li:nth-child(3) { border-left: 0; padding-left: 0; } }
@media (max-width: 700px) { .wrap { padding-inline: 24px; } .header { min-height: 90px; gap: 4px; flex-wrap: wrap; padding-top: 18px; padding-bottom: 10px; } .brand { font-size: 25px; gap: 8px; } .brand img { width: 34px; } nav { width: 100%; gap: 0; justify-content: space-between; } nav a { font-size: 13px; } .hero { grid-template-columns: 1fr; padding-top: 30px; padding-bottom: 70px; gap: 38px; } h1 { font-size: clamp(3rem, 12vw, 4.8rem); } .intro { font-size: 18px; } .phone { width: 258px; border-width: 7px; border-radius: 35px; } .app-figure { padding-top: 12px; } .chapter { padding-top: 65px; padding-bottom: 65px; } .steps, .evidence-layout, .release-layout, .participate, .split-layout, .utility-notes, .architecture-heading, .architecture-foot { grid-template-columns: 1fr; gap: 30px; } .chapter-heading { margin-bottom: 32px; } .steps article { padding-top: 18px; } .steps p { max-width: 60ch; } .evidence-band, .architecture-band { padding-block: 65px; } .signal-flow { grid-template-columns: 1fr; gap: 0; } .signal-flow li + li { border-left: 0; padding-left: 0; } .signal-flow li { padding-right: 0; } .release { padding: 24px; } .participate .intro { margin-top: 0; } .footer { flex-wrap: wrap; gap: 22px; } .footer p { flex: 1; min-width: 150px; } .footer > a:last-child { flex-basis: 100%; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }