/* Neutron Health — the Studio site's structure in Health's Quiet Room palette
   and brand ring (D113, D114). No scripts, no web fonts, no third parties. */
:root {
  color-scheme: dark;
  --bg: #141218; --panel: #1B191F; --ink: #F4F1EC; --muted: #B9B3BE; --faint: #9C95A3;
  --line: rgba(244, 241, 236, 0.10); --brand: #FF375F;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  background: var(--bg); color: var(--ink); -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--brand); outline-offset: 6px; }
.wrap { width: min(1280px, calc(100% - 112px)); margin-inline: auto; }

.header { height: 110px; display: flex; align-items: center; justify-content: space-between; position: relative; z-index: 2; }
.wordmark { font-size: 25px; font-weight: 700; letter-spacing: -1px; display: inline-flex; align-items: center; gap: 12px; white-space: nowrap; }
.ring-mark { width: 26px; height: 26px; border-radius: 50%; border: 5px solid var(--brand); flex: none; }
.nav-link { font-size: 12px; letter-spacing: .03em; display: flex; gap: 30px; padding: 12px 0; border-bottom: 1px solid #5d5a63; }
.nav-link:hover { border-color: var(--ink); }

.hero { position: relative; min-height: 740px; display: flex; align-items: center; isolation: isolate; }
.hero-content { position: relative; z-index: 1; padding: 46px 0 120px; }
.eyebrow { font: 10px/1.7 var(--mono); letter-spacing: 2px; color: var(--muted); display: flex; align-items: center; gap: 10px; margin: 0 0 30px; }
.status-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--brand); display: inline-block; flex: none; box-shadow: 0 0 9px #FF375F80; }
h1 { font-size: clamp(64px, 8vw, 112px); font-weight: 600; letter-spacing: -.05em; line-height: .98; margin: 0 0 34px; }
h2 { font-size: clamp(40px, 5vw, 64px); font-weight: 600; letter-spacing: -.045em; line-height: 1.06; margin: 0; }
p { line-height: 1.65; }
.hero-description { font-size: 18px; line-height: 1.7; color: var(--muted); margin: 0 0 35px; }
.button { min-height: 54px; display: inline-flex; justify-content: space-between; align-items: center; gap: 46px; background: var(--ink); color: var(--bg); font-size: 13px; font-weight: 600; border: 1px solid var(--ink); padding: 17px 24px; transition: background .15s, border-color .15s; }
.button:hover { background: #D8D3CC; border-color: #D8D3CC; }
.button span[aria-hidden] { font-size: 20px; font-weight: 400; line-height: 1; }
.button.wide { width: 100%; margin-top: 30px; }
.hero-note { font: 9px/1.6 var(--mono); letter-spacing: 1.6px; color: var(--faint); margin-top: 22px; }
.hero-bottom { position: absolute; bottom: 30px; left: 0; right: 0; display: flex; justify-content: space-between; align-items: center; font: 9px/1.6 var(--mono); letter-spacing: 1.5px; color: var(--faint); }
.hero-bottom a { display: flex; gap: 30px; }

/* The brand ring as the hero's planet, on two quiet orbits. */
.orbital { position: absolute; z-index: -1; width: 690px; height: 690px; right: -35px; top: -2px; pointer-events: none; overflow: hidden; }
.ring { position: absolute; width: 400px; height: 400px; border-radius: 50%; top: 145px; left: 145px; border: 78px solid var(--brand); box-shadow: 0 0 120px #FF375F26, inset 0 0 60px #00000040; }
.orbit { position: absolute; border: 1px solid #F4F1EC1F; border-radius: 50%; width: 650px; height: 280px; left: 20px; top: 205px; transform: rotate(-33deg); }
.orbit-two { width: 610px; height: 540px; left: 38px; top: 71px; transform: rotate(27deg); border-color: #F4F1EC0F; }
.orbital-point { position: absolute; width: 6px; height: 6px; background: var(--ink); border-radius: 50%; top: 230px; left: 574px; box-shadow: 0 0 14px #F4F1EC; }

.about { border-top: 1px solid var(--line); padding-top: 100px; padding-bottom: 105px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 100px; }
.about-copy .intro { margin: 0 0 48px; font-size: 20px; line-height: 1.7; color: var(--muted); max-width: 560px; }
.features article { display: grid; grid-template-columns: 30px 1fr; column-gap: 15px; padding: 23px 0; border-top: 1px solid var(--line); }
.feature-number { font: 10px/1.8 var(--mono); color: var(--faint); }
.features h3 { font-size: 16px; font-weight: 600; margin: 0; }
.features p { grid-column: 2; font-size: 13px; color: var(--muted); margin: 9px 0 0; max-width: 400px; }

.download-section { background: var(--panel); border-block: 1px solid var(--line); }
.download { display: grid; grid-template-columns: 1fr 1fr; gap: 110px; padding-block: 100px; }
.download-copy > p:not(.eyebrow) { font-size: 15px; color: var(--muted); max-width: 380px; margin-top: 28px; }
.download-panel { align-self: center; width: 100%; }
.specs { margin: 0; }
.specs div { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 18px 0; border-top: 1px solid var(--line); }
.specs div:last-child { border-bottom: 1px solid var(--line); }
.specs dt { font: 10px/1.9 var(--mono); letter-spacing: 1.8px; color: var(--faint); }
.specs dd { margin: 0; font-size: 14px; }
.panel-note { color: var(--faint); font-size: 12px; line-height: 1.9; margin: 20px 0 0; }
.panel-note a { text-decoration: underline; text-underline-offset: 3px; }

.questions { padding-block: 90px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 100px; }
.question-list details { border-top: 1px solid var(--line); }
.question-list details:last-child { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; padding: 24px 0; font-size: 14px; display: flex; gap: 24px; justify-content: space-between; line-height: 1.5; }
summary::-webkit-details-marker { display: none; }
summary span { font-size: 18px; color: var(--faint); }
details[open] summary span { transform: rotate(45deg); }
details p { font-size: 13px; color: var(--muted); margin: 0 0 25px; max-width: 540px; }

.footer { border-top: 1px solid var(--line); padding-block: 35px; display: flex; align-items: center; justify-content: space-between; }
.footer .wordmark { font-size: 20px; }
.footer .ring-mark { width: 20px; height: 20px; border-width: 4px; }
.footer div { display: flex; gap: 38px; font: 9px/1.8 var(--mono); letter-spacing: 1.2px; color: var(--faint); }
.skip { position: absolute; top: -100px; left: 20px; background: var(--ink); color: var(--bg); padding: 12px; z-index: 10; }
.skip:focus { top: 10px; }

@media (max-width: 1050px) {
  .wrap { width: calc(100% - 64px); }
  .hero { min-height: 700px; }
  .orbital { right: -32px; width: 560px; opacity: .65; }
  .ring { left: 150px; width: 340px; height: 340px; top: 160px; border-width: 66px; }
  .about, .questions { gap: 55px; }
  .download { gap: 60px; }
}
@media (max-width: 700px) {
  .wrap { width: calc(100% - 32px); }
  .header { height: 84px; }
  .wordmark { font-size: 22px; }
  .nav-link { font-size: 11px; gap: 15px; }
  .hero { min-height: 690px; align-items: flex-start; overflow: hidden; }
  .hero-content { padding-top: 72px; padding-bottom: 130px; }
  .eyebrow { font-size: 8px; letter-spacing: 1.4px; gap: 8px; margin-bottom: 27px; }
  h1 { font-size: clamp(52px, 12vw, 80px); margin-bottom: 26px; }
  .hero-description { font-size: 15px; max-width: 320px; }
  .hero-description br { display: none; }
  .hero-note { font-size: 8px; letter-spacing: 1px; }
  .orbital { width: 480px; height: 550px; right: -170px; top: 105px; opacity: .35; }
  .ring { left: 100px; top: 160px; width: 280px; height: 280px; border-width: 54px; }
  .hero-bottom { font-size: 7px; letter-spacing: .8px; bottom: 29px; }
  .hero-bottom a { gap: 10px; }
  .about, .questions, .download { grid-template-columns: 1fr; gap: 40px; padding-block: 64px; }
  .about-copy .intro { font-size: 18px; margin-bottom: 32px; }
  .specs div { grid-template-columns: 1fr; gap: 4px; }
  .panel-note br { display: none; }
  .questions { gap: 12px; }
  summary { font-size: 13px; padding-block: 22px; }
  .footer { align-items: flex-start; padding-block: 28px; }
  .footer div { flex-direction: column; gap: 6px; text-align: right; font-size: 8px; }
}
@media (prefers-reduced-motion: reduce) { .button { transition: none; } }