/* Base layout, accessibility and responsive structure. */
:root {
  color-scheme: dark;
  --bg: #0b1320;
  --panel: #0f1c2f;
  --text: #f2f7ff;
  --muted: #b5c7db;
  --accent: #2dd4bf;
  --line: #2b3f56;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; width: 100%; overflow-x: hidden; }
body { margin: 0; width: 100%; overflow-x: hidden; overflow-x: clip; background: var(--bg); color: var(--text); font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
/* Decorative glows and orbital rings must not enlarge Safari's page viewport. */
main { overflow-x: hidden; overflow-x: clip; }
.hero > *, .flow li div, .feature-grid > *, .mode-grid > *, .values > *, .roadmap > * { min-width: 0; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.08; letter-spacing: -.04em; }
p { color: var(--muted); }
.wrap { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }
.skip { position: absolute; left: 20px; top: -80px; background: var(--accent); color: var(--bg); padding: 10px; z-index: 10; }
.skip:focus { top: 12px; }
.header { display: flex; align-items: center; justify-content: space-between; gap: 26px; min-height: 108px; border-bottom: 1px solid var(--line); }
.brand img { display: block; width: 150px; height: 64px; object-fit: contain; }
.header nav { display: flex; gap: 30px; font-size: 14px; color: var(--muted); }
.header nav a:hover, .text-link:hover { color: var(--accent); }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 25px; padding: 14px 22px; border: 1px solid var(--line); border-radius: 7px; font-size: 14px; font-weight: 650; }
.button:hover { background: #1b2c45; border-color: var(--accent); }
.button.primary { background: var(--accent); color: #071d22; border-color: var(--accent); }
.button.primary:hover { background: #5eead4; }
.button.small { padding: 11px 17px; }
.hero { position: relative; display: grid; grid-template-columns: 1.08fr 1fr; gap: 65px; align-items: center; padding-block: 88px 100px; }
.eyebrow { font-size: 11px; letter-spacing: .16em; font-weight: 650; text-transform: uppercase; color: var(--accent); }
.dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-right: 9px; }
.hero h1 { font-size: clamp(52px, 6.2vw, 82px); margin-block: 23px 26px; letter-spacing: -.065em; }
.hero h1 span { color: var(--accent); }
.intro { font-size: 18px; line-height: 1.7; max-width: 510px; }
.hero-actions { display: flex; gap: 25px; align-items: center; margin-top: 32px; }
.text-link { font-size: 13px; font-weight: 600; }
.hero-note { font-size: 11px; margin-top: 25px; max-width: 410px; }
.system-view { background: #152b43; border: 1px solid #3c6175; border-radius: 16px; padding: 27px; }
.view-top { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); padding-bottom: 19px; }
.view-brand { font-size: 20px; font-weight: 750; letter-spacing: -.05em; }
.view-label { font-size: 10px; border: 1px solid #326b70; border-radius: 30px; padding: 3px 10px; color: var(--accent); }
.view-heading { padding: 24px 0 15px; }
.view-heading strong { display: block; font-size: 26px; letter-spacing: -.045em; margin-top: 8px; }
.flow { list-style: none; padding: 0; margin: 0; }
.flow li { display: flex; gap: 17px; align-items: center; padding: 16px 0; border-bottom: 1px solid var(--line); }
.flow-number { font-size: 11px; color: var(--accent); font-weight: 600; width: 30px; height: 30px; flex-shrink: 0; border: 1px solid #326b70; border-radius: 50%; display: grid; place-items: center; }
.flow li div { flex: 1; }
.flow strong { display: block; font-size: 14px; }
.flow div span { display: block; color: var(--muted); font-size: 11px; margin-top: 2px; }
.flow li > span:last-child { color: var(--accent); }
.view-bottom { font-size: 10px; color: var(--muted); padding-top: 20px; }
.principles { border-block: 1px solid var(--line); }
.principles > .wrap { display: flex; justify-content: space-between; gap: 20px; padding-block: 19px; font-size: 12px; color: #d9e7f5; }
.principles span:before { content: "+"; color: var(--accent); margin-right: 13px; }
.section { padding-block: 95px; }
.section-heading { max-width: 700px; margin-bottom: 43px; }
h2 { font-size: clamp(32px, 4vw, 49px); margin-top: 17px; }
.section-heading > p:last-child { max-width: 640px; margin-top: 23px; font-size: 16px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature { padding: 29px 31px 32px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }
.feature-index { font-size: 10px; letter-spacing: .12em; color: var(--accent); }
h3 { font-size: 23px; letter-spacing: -.025em; }
.feature h3 { margin-top: 25px; margin-bottom: 14px; }
.feature p { font-size: 14px; }
.section-note { font-size: 12px; margin-top: 22px; max-width: 810px; }
.mode-section { background: #0e1929; border-block: 1px solid var(--line); }
.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; }
.mode { border: 1px solid var(--line); padding: 32px; border-radius: 12px; background: var(--bg); }
.mode.core { border-color: #326b70; background: #112c38; }
.mode-tag { font-size: 10px; letter-spacing: .12em; color: var(--accent); }
.mode h3 { font-size: 32px; margin: 20px 0 18px; }
.mode p { font-size: 14px; }
.mode ul { padding-left: 20px; color: #d9e7f5; font-size: 14px; line-height: 1.7; margin-block: 25px; }
.mode li { padding: 5px 0; }
.mode li::marker { color: var(--accent); }
.mode .mode-foot { padding-top: 20px; border-top: 1px solid var(--line); font-size: 12px; }
.mobile-note { display: flex; align-items: center; gap: 24px; margin-top: 28px; padding: 25px 0; }
.mobile-mark { font-size: 34px; color: var(--accent); }
.mobile-note div { flex: 1; }
.mobile-note h3 { font-size: 19px; margin-bottom: 8px; }
.mobile-note p { font-size: 13px; max-width: 790px; }
.status { font-size: 10px; color: var(--muted); border: 1px solid var(--line); padding: 5px 11px; border-radius: 30px; display: inline-block; line-height: 1.5; }
.status.current { color: var(--accent); border-color: #326b70; }
.values { display: grid; grid-template-columns: 1fr 1.15fr; gap: 80px; }
.value-list article { padding-bottom: 25px; margin-bottom: 25px; border-bottom: 1px solid var(--line); }
.value-list article:last-child { margin: 0; }
.value-list h3 { font-size: 21px; margin-bottom: 12px; }
.value-list p { font-size: 14px; }
.development { border-top: 1px solid var(--line); }
.roadmap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.roadmap article { border-top: 2px solid #326b70; padding-top: 22px; }
.roadmap h3 { font-size: 22px; margin: 22px 0 14px; }
.roadmap p { font-size: 13px; }
.contact { display: flex; align-items: center; justify-content: space-between; gap: 40px; border: 1px solid #326b70; background: #112c38; border-radius: 13px; padding: 40px; }
.contact h2 { font-size: 36px; margin-top: 13px; }
.contact p:not(.eyebrow) { font-size: 14px; max-width: 660px; margin-top: 18px; }
.contact .button { flex-shrink: 0; }
.footer { padding-block: 50px 28px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 18px; }
.footer > div { display: flex; align-items: center; gap: 20px; }
.footer strong { font-size: 18px; letter-spacing: -.04em; }
.footer span, .footer p { font-size: 11px; }
.footer .legal-draft { flex-basis: 100%; border-top: 1px solid var(--line); padding-top: 18px; color: #a4b6cc; }
/* CSS-only diagram of the planned device/Core architecture. */
.core-visual { display: grid; grid-template-columns: 1fr 70px 1.5fr 70px 1fr; align-items: center; margin-top: 32px; padding: 40px 40px 24px; border: 1px solid #2b4b60; border-radius: 14px; background: radial-gradient(ellipse at 50% 50%, #2dd4bf0d, transparent 70%), #0c1929; }
.core-visual > p { grid-column: 1/-1; text-align: center; font-size: 11px; margin-top: 25px; }
.device { display: flex; align-items: center; flex-direction: column; gap: 12px; }
.device strong, .core-node strong { font-size: 13px; }
.device-screen { width: 140px; height: 88px; display: flex; gap: 7px; border: 2px solid #52708a; border-radius: 7px; padding: 9px; background: #14283d; box-shadow: 0 8px 25px #0004; }
.mini-sidebar { width: 20px; background: #2dd4bf30; border-radius: 3px; }
.mini-content { flex: 1; display: flex; flex-direction: column; gap: 5px; padding-top: 3px; }
.mini-content i { height: 12px; background: #52708a50; border-radius: 3px; }
.mini-content i:first-child { width: 70%; background: #2dd4bf60; }
.device-base { width: 156px; height: 5px; border-radius: 0 0 6px 6px; background: #52708a; margin-top: -13px; }
.core-node { display: flex; flex-direction: column; align-items: center; gap: 13px; text-align: center; }
.core-node > span:last-child { font-size: 11px; color: var(--muted); }
.server-stack { display: flex; flex-direction: column; gap: 5px; padding: 16px 20px; border: 1px solid #2dd4bf60; border-radius: 12px; background: #12333e; }
.server-stack i { display: block; width: 75px; height: 12px; background: #1e5160; border-radius: 3px; position: relative; }
.server-stack i:before { content: ""; position: absolute; left: 8px; top: 4px; width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }
.connector { height: 1px; background: linear-gradient(90deg, #3d647c, #2dd4bf); position: relative; }
.connector:after { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); position: absolute; right: 0; top: -2px; box-shadow: 0 0 10px #2dd4bf80; }
.phone-screen { width: 54px; height: 95px; border: 2px solid #52708a; border-radius: 11px; background: #14283d; padding: 16px 7px 7px; display: flex; flex-direction: column; gap: 6px; position: relative; box-shadow: 0 8px 25px #0004; }
.phone-screen:before { content: ""; position: absolute; top: 6px; left: 19px; width: 12px; height: 2px; border-radius: 2px; background: #52708a; }
.phone-screen i { height: 16px; border-radius: 3px; background: #52708a50; }
.phone-screen i:first-child { background: #2dd4bf60; }
@media (max-width: 960px) {
  .header nav { gap: 16px; }
  .header > .button { display: none; }
  .mobile-note { flex-wrap: wrap; }
  .mobile-note > .status { margin-left: 47px; }
  .contact { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 680px) {
  .header { min-height: 92px; flex-wrap: wrap; justify-content: center; gap: 0; padding: 12px 0 17px; }
  .brand img { width: 128px; height: 47px; }
  .header nav { width: 100%; justify-content: center; gap: 23px; font-size: 12px; }
  .principles > .wrap { flex-direction: column; gap: 8px; font-size: 11px; }
  .section-heading { margin-bottom: 30px; }
  .mobile-note { align-items: flex-start; }
  .mobile-note > .status { margin-left: 55px; }
  .footer > div { flex-direction: column; align-items: flex-start; gap: 5px; }
  .core-visual { grid-template-columns: 1fr 25px 1.2fr 25px 1fr; padding: 27px 12px 20px; }
  .device-screen { width: 78px; height: 53px; padding: 5px; gap: 4px; }
  .mini-sidebar { width: 12px; }
  .mini-content { gap: 3px; }
  .mini-content i { height: 6px; }
  .device-base { width: 90px; }
  .device strong, .core-node strong { font-size: 10px; }
  .core-node > span:last-child { font-size: 9px; }
  .server-stack { padding: 10px; }
  .server-stack i { width: 45px; height: 10px; }
  .phone-screen { width: 36px; height: 64px; padding: 12px 4px 4px; gap: 4px; }
  .phone-screen:before { left: 12px; width: 8px; }
  .phone-screen i { height: 10px; }
  .core-visual > p { font-size: 9px; }
}