:root {
  color-scheme: light;
  --ink: #253246;
  --muted: #667487;
  --muted-strong: #46566a;
  --line: rgba(77, 99, 124, .18);
  --surface: #f6f8fa;
  --surface-strong: #e3e9ef;
  --page: #e8edf2;
  --accent: #3d668e;
  --accent-strong: #567b9d;
  --accent-ink: #ffffff;
  --warm: #946200;
  --max: 72rem;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: linear-gradient(180deg, #eef2f5 0, var(--page) 38rem);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--warm); outline-offset: 4px; }

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 10;
  padding: .65rem .85rem;
  border-radius: .6rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 750;
}

.skip-link:focus { top: 1rem; }

.site-header, .site-footer, .container { width: min(var(--max), calc(100% - 2.5rem)); margin-inline: auto; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.25rem;
}

.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font-weight: 800; letter-spacing: -.03em; }
.brand-mark { display: grid; place-items: center; width: 2.15rem; height: 2.15rem; border-radius: .65rem; background: var(--accent); color: var(--accent-ink); box-shadow: 0 .35rem 1rem rgba(40, 91, 143, .18); font-size: .8rem; font-weight: 900; }
.brand-name { font-size: 1.05rem; }

.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .25rem .8rem; }
.site-nav a { padding: .35rem .45rem; color: var(--muted-strong); font-size: .88rem; text-decoration: none; }
.site-nav a:hover { color: var(--ink); }
.site-nav .nav-cta { padding: .55rem .8rem; border: 1px solid rgba(61, 102, 142, .3); border-radius: 999px; color: var(--accent); background: #f3f5f7; font-weight: 700; }

.hero { padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(4rem, 8vw, 6rem); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(18rem, .85fr); align-items: end; gap: clamp(2rem, 7vw, 7rem); }
.eyebrow { margin: 0 0 1.1rem; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -.045em; }
h1 { max-width: 13ch; font-size: clamp(3.1rem, 7vw, 5.8rem); }
h2 { max-width: 17ch; font-size: clamp(2.1rem, 4vw, 3.5rem); }
h3 { font-size: 1.25rem; }
.hero-copy { max-width: 39rem; margin: 1.4rem 0 0; color: var(--muted-strong); font-size: clamp(1.05rem, 2vw, 1.3rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 2.9rem; padding: .75rem 1.05rem; border: 1px solid transparent; border-radius: .75rem; background: var(--accent); color: var(--accent-ink); font-weight: 800; text-decoration: none; transition: transform .16s cubic-bezier(.23, 1, .32, 1), background .16s ease, border-color .16s ease, box-shadow .16s ease; }
.button:active { transform: scale(.98); }
.button.secondary { border-color: var(--line); background: transparent; color: var(--ink); }
.button.small { min-height: 2.5rem; padding: .6rem .85rem; font-size: .9rem; }
.hero-note { margin: 1rem 0 0; color: var(--muted); font-size: .82rem; }

.signal-card { position: relative; overflow: hidden; padding: 1.35rem; border: 1px solid var(--line); border-top: 3px solid #7893ab; border-radius: 1.15rem; background: #f2f5f7; box-shadow: 0 2rem 5rem rgba(31, 49, 70, .08); }
.signal-card::after { position: absolute; right: -4rem; bottom: -5rem; width: 13rem; height: 13rem; border-radius: 50%; background: rgba(40, 91, 143, .06); content: ""; }
.signal-label { margin: 0 0 1.5rem; color: var(--muted); font-size: .74rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.signal-title { max-width: 11ch; font-size: clamp(2rem, 4vw, 3.2rem); }
.signal-list { position: relative; z-index: 1; display: grid; gap: .75rem; margin: 2rem 0 0; }
.signal-row { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; padding-top: .75rem; border-top: 1px solid var(--line); }
.signal-row span { color: var(--muted); font-size: .82rem; }
.signal-row strong { color: var(--accent); font-size: .86rem; }

.section { padding-block: clamp(4.5rem, 9vw, 8rem); border-top: 1px solid var(--line); }
.section-intro { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.4rem; }
.section-intro p { max-width: 30rem; margin: 0; color: var(--muted); }
.kicker { margin: 0 0 .8rem; color: var(--warm); font-size: .76rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }

.loop { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .7rem; }
.loop-step { min-height: 12rem; padding: 1rem; border: 1px solid var(--line); border-radius: .9rem; background: var(--surface); }
.loop-number { display: inline-grid; place-items: center; width: 1.75rem; height: 1.75rem; margin-bottom: 1.4rem; border-radius: 50%; background: #dfe7ee; color: var(--accent); font-weight: 800; }
.loop-step p { margin: .55rem 0 0; color: var(--muted); font-size: .9rem; }
.state { display: inline-block; margin-top: 1rem; padding: .2rem .45rem; border-radius: .35rem; background: #fff3d6; color: var(--warm); font-size: .68rem; font-weight: 800; letter-spacing: .04em; }

.roles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.role-card { padding: 1.35rem; border: 1px solid var(--line); border-radius: 1rem; background: var(--surface); }
.role-card .role-mark { display: grid; place-items: center; width: 2.1rem; height: 2.1rem; margin-bottom: 1.5rem; border-radius: .6rem; background: #dfe7ee; color: var(--accent); font-size: .78rem; font-weight: 900; }
.role-card p { margin: .65rem 0 0; color: var(--muted); }
.role-card ul { display: grid; gap: .45rem; margin: 1.15rem 0 0; padding-left: 1.1rem; color: var(--muted-strong); font-size: .9rem; }

.focus-grid, .trust-grid, .download-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1rem; }
.panel { padding: clamp(1.25rem, 3vw, 2rem); border: 1px solid var(--line); border-radius: 1rem; background: var(--surface); }
.panel p { margin: .8rem 0 0; color: var(--muted); }
.panel ul { display: grid; gap: .65rem; margin: 1.25rem 0 0; padding-left: 1.1rem; color: var(--muted-strong); }
.panel li::marker { color: var(--accent); }
.callout { border-color: rgba(148, 98, 0, .24); background: #fff9ec; }
.callout h3 { color: var(--warm); }

.demo { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 2rem; padding: clamp(1.5rem, 4vw, 3rem); border: 1px solid rgba(40, 91, 143, .22); border-radius: 1.15rem; background: var(--surface-strong); }
.demo p { max-width: 41rem; margin: .8rem 0 0; color: var(--muted-strong); }
.demo-actions { display: flex; flex-wrap: wrap; gap: .7rem; }

.meta { display: grid; gap: .65rem; margin: 1.4rem 0 0; }
.meta-row { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: .65rem; border-bottom: 1px solid var(--line); font-size: .88rem; }
.meta-row span:first-child { color: var(--muted); }
.meta-row strong, .meta-row code { color: var(--muted-strong); font-size: .82rem; text-align: right; overflow-wrap: anywhere; }
.download-note { margin-top: 1.1rem !important; font-size: .82rem; }

.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding-block: 2.5rem 3rem; color: var(--muted); font-size: .82rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .6rem 1rem; }
.footer-links a { color: var(--muted-strong); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }

.legal-wrap { max-width: 52rem; padding-block: 4.5rem 7rem; }
.legal-wrap h1 { max-width: none; font-size: clamp(2.7rem, 7vw, 5rem); }
.legal-wrap .lede { max-width: 43rem; margin: 1.15rem 0 0; color: var(--muted-strong); font-size: 1.12rem; }
.legal-shell { max-width: 52rem; min-height: min(100vh, 42rem); padding-block: clamp(4rem, 11vw, 8rem); }
.invite-shell { display: grid; align-content: center; }
.invite-shell h1 { max-width: 13ch; }
.invite-shell .lede { max-width: 41rem; }
.invite-shell .notice { max-width: 42rem; margin-top: 1.8rem; }
.invite-shell .hero-actions { margin-top: 1.8rem; }
.legal-content { margin-top: 3rem; }
.legal-content h2 { max-width: none; margin-top: 2.5rem; font-size: 1.45rem; letter-spacing: -.025em; }
.legal-content h2:first-child { margin-top: 0; }
.legal-content p, .legal-content li { color: var(--muted-strong); }
.legal-content ul { display: grid; gap: .55rem; padding-left: 1.2rem; }
.legal-content a { color: var(--accent); }
.notice { padding: 1rem 1.1rem; border-left: 3px solid var(--warm); border-radius: .2rem .7rem .7rem .2rem; background: #fff8e7; color: var(--muted-strong); }
.back-link { display: inline-flex; margin-top: 2.4rem; color: var(--accent); font-weight: 750; text-decoration: none; }
.legal-meta { margin-top: .8rem; color: var(--muted); font-size: .86rem; }
.legal-table { overflow-x: auto; margin-top: 1rem; border: 1px solid var(--line); border-radius: .8rem; }
.legal-table table { width: 100%; min-width: 48rem; border-collapse: collapse; background: var(--surface); }
.legal-table th, .legal-table td { padding: .8rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.legal-table th { color: var(--ink); font-size: .8rem; }
.legal-table td { color: var(--muted-strong); font-size: .82rem; }

@media (hover: hover) and (pointer: fine) {
  .button:hover { background: var(--accent-strong); box-shadow: 0 .65rem 1.5rem rgba(40, 91, 143, .16); transform: translateY(-1px); }
  .button.secondary:hover { border-color: rgba(61, 102, 142, .34); background: #e4eaf0; box-shadow: none; }
  .site-nav .nav-cta:hover { border-color: rgba(61, 102, 142, .5); background: #e4eaf0; }
}

@media (max-width: 58rem) {
  .hero-grid, .focus-grid, .trust-grid, .download-grid { grid-template-columns: 1fr; }
  .loop { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .loop-step:last-child { grid-column: 1 / -1; }
  .demo { grid-template-columns: 1fr; }
}

@media (max-width: 42rem) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .site-nav { justify-content: flex-start; }
  .site-header, .site-footer, .container { width: min(var(--max), calc(100% - 1.5rem)); }
  .legal-shell { width: min(var(--max), calc(100% - 1.5rem)); }
  h1 { font-size: clamp(2.8rem, 15vw, 4.6rem); }
  .section-intro, .site-footer { align-items: flex-start; flex-direction: column; }
  .roles, .loop { grid-template-columns: 1fr; }
  .loop-step:last-child { grid-column: auto; }
  .meta-row { align-items: flex-start; flex-direction: column; gap: .15rem; }
  .meta-row strong, .meta-row code { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}