:root {
  color-scheme: light;
  --paper: #f7f5ef;
  --ink: #20202a;
  --muted: #696974;
  --line: #d9d5ca;
  --violet: #646bff;
  --violet-deep: #4f55dd;
  --apricot: #ffb86b;
  --white: #fffefa;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 84% 10%, rgba(255,184,107,.2), transparent 25rem),
    radial-gradient(circle at 8% 36%, rgba(100,107,255,.1), transparent 30rem),
    var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }

.nav {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand { color: var(--ink); display: inline-flex; align-items: center; gap: 8px; font-size: 1.25rem; font-weight: 760; text-decoration: none; }
.brand-mark { width: 48px; height: 48px; }
.platform { color: var(--muted); font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  align-items: center;
  gap: clamp(48px, 8vw, 112px);
  padding-block: 72px 96px;
}

.eyebrow { margin: 0 0 18px; color: var(--violet-deep); font-size: .78rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
h1, h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-weight: 400; letter-spacing: -.045em; line-height: .94; }
h1 { max-width: 680px; font-size: clamp(3.5rem, 7vw, 6.8rem); }
h1 em { color: var(--violet-deep); font-weight: 400; }
.lede { max-width: 610px; margin: 32px 0; color: var(--muted); font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height: 1.65; }

.download-panel { max-width: 480px; }
.download-button {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 17px 20px;
  border-radius: 18px;
  background: var(--ink);
  color: var(--white);
  text-decoration: none;
  box-shadow: 0 14px 34px rgba(32,32,42,.16);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-button:hover { transform: translateY(-2px); background: #30303c; box-shadow: 0 18px 42px rgba(32,32,42,.22); }
.download-button:focus-visible { outline: 4px solid rgba(100,107,255,.32); outline-offset: 3px; }
.download-icon { display: grid; place-items: center; width: 48px; height: 48px; flex: 0 0 auto; border-radius: 50%; background: var(--violet); font-size: 1.55rem; }
.download-button strong, .download-button small { display: block; }
.download-button strong { font-size: 1rem; }
.download-button small { margin-top: 5px; color: #c8c7ce; }
.release-status, .install-note { color: var(--muted); font-size: .84rem; line-height: 1.55; }
.release-status { margin: 10px 4px 0; min-height: 1.4em; }
.release-status.error { color: #a33c3c; }
.install-note { max-width: 470px; margin: 24px 4px 0; }

.connection-card {
  position: relative;
  min-height: 480px;
  overflow: hidden;
  border: 1px solid rgba(100,107,255,.22);
  border-radius: 40px;
  background: rgba(255,254,250,.74);
  box-shadow: 0 30px 80px rgba(44,43,70,.12);
  isolation: isolate;
}
.connection-card::before { content: ""; position: absolute; inset: 22px; border: 1px solid var(--line); border-radius: 28px; }
.connection-card p { position: absolute; inset-inline: 0; bottom: 54px; margin: 0; color: var(--muted); text-align: center; line-height: 1.5; }
.orbit { position: absolute; inset: 50% auto auto 50%; border: 1px solid rgba(100,107,255,.22); border-radius: 50%; transform: translate(-50%,-50%); }
.orbit-one { width: 310px; height: 310px; animation: breathe 5s ease-in-out infinite; }
.orbit-two { width: 220px; height: 220px; animation: breathe 5s 1s ease-in-out infinite; }
.person { position: absolute; top: 42%; display: grid; place-items: center; width: 88px; height: 88px; border-radius: 50%; color: var(--ink); font-size: .76rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; box-shadow: 0 12px 30px rgba(32,32,42,.12); transform: translateY(-50%); }
.person-left { left: 15%; background: var(--violet); color: white; }
.person-right { right: 15%; background: var(--apricot); }
.secure-line { position: absolute; top: 42%; left: calc(15% + 88px); right: calc(15% + 88px); height: 2px; background: linear-gradient(90deg, var(--violet), var(--apricot)); }
.secure-line span { position: absolute; left: 50%; top: 50%; padding: 7px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); color: var(--muted); font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; transform: translate(-50%,-50%); }

.principles { display: grid; grid-template-columns: .75fr 1.25fr; gap: 80px; padding-block: 100px; border-top: 1px solid var(--line); }
h2 { font-size: clamp(2.8rem, 5vw, 5rem); }
.principle-grid { display: grid; gap: 0; }
.principle-grid article { display: grid; grid-template-columns: 48px 190px 1fr; gap: 20px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.principle-grid article:first-child { border-top: 1px solid var(--line); }
.principle-grid span { color: var(--violet-deep); font-size: .72rem; font-weight: 800; }
.principle-grid h3, .principle-grid p { margin: 0; }
.principle-grid h3 { font-size: 1rem; }
.principle-grid p { color: var(--muted); font-size: .94rem; line-height: 1.55; }

footer { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding-block: 32px 46px; border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
footer p { margin: 0; }
footer a { color: var(--violet-deep); }

@keyframes breathe { 0%,100% { opacity: .5; transform: translate(-50%,-50%) scale(.96); } 50% { opacity: 1; transform: translate(-50%,-50%) scale(1.04); } }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; } }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 58px 72px; }
  .connection-card { min-height: 400px; }
  .principles { grid-template-columns: 1fr; gap: 48px; padding-block: 72px; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 28px, 1160px); }
  .nav { min-height: 72px; }
  .hero { gap: 44px; padding-top: 44px; }
  h1 { font-size: clamp(3.2rem, 17vw, 5rem); }
  .connection-card { min-height: 350px; border-radius: 28px; }
  .person { width: 72px; height: 72px; }
  .person-left { left: 9%; }
  .person-right { right: 9%; }
  .secure-line { left: calc(9% + 72px); right: calc(9% + 72px); }
  .principle-grid article { grid-template-columns: 34px 1fr; }
  .principle-grid p { grid-column: 2; }
  footer { align-items: flex-start; flex-direction: column; }
}