* { box-sizing: border-box; }
/* Let the page canvas extend beneath system UI while keeping controls clear.
   The maximum bottom inset avoids layout changes as Chrome's bars retract. */
:root { --safe-area-bottom: env(safe-area-max-inset-bottom, env(safe-area-inset-bottom, 0px)); }
html { background: var(--surface); scroll-behavior: smooth; scroll-padding-top: 190px; scrollbar-gutter: stable; }
body { min-height: 100svh; margin: 0; padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) var(--safe-area-bottom) env(safe-area-inset-left, 0px); font: 400 1rem/1.65 var(--font); background: var(--surface); color: var(--on-surface); transition: background-color var(--motion), color var(--motion); }
[hidden] { display: none !important; }
button, select { font: inherit; }
button, a, select, summary { -webkit-tap-highlight-color: transparent; }
a { color: var(--primary); text-underline-offset: 4px; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 4px; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.15; }
h2 { font-size: var(--headline-large); letter-spacing: -.035em; font-weight: 650; }
h3 { font-size: 1.2rem; letter-spacing: -.015em; font-weight: 650; }
.container { width: min(var(--container), calc(100% - var(--page-gutter) * 2)); margin-inline: auto; }
.section { padding-block: 68px; }
.section-heading { display: flex; align-items: flex-start; gap: 20px; margin-bottom: 32px; max-width: 840px; }
.section-heading p { margin-top: 14px; color: var(--on-surface-variant); font-size: var(--body-large); }
.grid { display: grid; gap: 20px; }
.grid > * { min-width: 0; }
.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.steps { grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); align-items: start; }
.feature-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
/* Floating rounded app bar, following the CRYONUM header. */
.topbar { --header-offset: 12px; --header-gutter: var(--page-gutter); width: min(var(--container), calc(100% - var(--header-gutter) * 2)); position: sticky; top: calc(var(--header-offset) + env(safe-area-inset-top, 0px)); z-index: 20; margin: var(--header-offset) auto 0; padding: 10px 20px; background: var(--surface-bright); border: 1px solid var(--outline-variant); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.topbar .bar-main { width: 100%; margin: 0; }
.bar-main { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--on-surface); font-size: 1.16rem; font-weight: 700; letter-spacing: -.02em; text-decoration: none; }
.bar-controls { display: flex; align-items: center; gap: 10px; }
.navigation { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px; padding-block: 4px 14px; }
.navigation > a { text-decoration: none; color: var(--on-surface-variant); padding: 8px 12px; border-radius: 999px; font-size: .9rem; font-weight: 550; white-space: nowrap; transition: background var(--motion), color var(--motion); }
.navigation > a:hover { background: var(--secondary-container); color: var(--on-secondary-container); }
.drawer-heading { display: none; }
.topbar.nav-ready .navigation { width: min(360px, calc(100% - 24px)); position: fixed; inset: 0 0 0 auto; z-index: 32; margin: 0; padding: calc(20px + env(safe-area-inset-top, 0px)) calc(20px + env(safe-area-inset-right, 0px)) calc(20px + var(--safe-area-bottom)) 20px; background: var(--surface-container-low); display: flex; flex-wrap: nowrap; flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 8px; max-height: 100dvh; overflow-y: auto; transform: translateX(100%); visibility: hidden; transition: transform 240ms ease, visibility 0s linear 240ms; box-shadow: var(--shadow); }
.topbar.nav-ready .navigation.open { transform: translateX(0); visibility: visible; transition-delay: 0s; }
.topbar.nav-ready .navigation > a { padding: 12px 20px; min-height: 48px; font-size: 1rem; }
.topbar.nav-ready .drawer-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; }
.nav-backdrop { position: fixed; inset: 0; background: var(--scrim); z-index: 31; }
.hero { display: grid; grid-template-columns: 1.13fr 1fr; gap: 60px; align-items: center; padding-block: 70px 64px; }
.hero-copy { container-type: inline-size; min-width: 0; }
.hero h1 { font-size: var(--display-large); line-height: 1.15; font-weight: 750; letter-spacing: -.035em; margin-block: 26px; white-space: nowrap; }
.hero h1 > span { color: var(--primary); }
.lead { color: var(--on-surface-variant); font-size: var(--body-large); margin-top: 20px; max-width: 510px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 28px; }
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; min-height: 595px; isolation: isolate; }
.section-link { display: flex; gap: 10px; align-items: center; margin-top: 24px; }
.footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; padding-block: 36px; border-top: 1px solid var(--outline-variant); font-size: .875rem; }
.footer .section-link { margin-top: 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 100; padding: 12px 24px; background: var(--primary); color: var(--on-primary); border-radius: 16px; }
.skip-link:focus { top: 12px; }
.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
body.menu-open { overflow: hidden; }
html.qr-dialog-open, html.qr-dialog-open body { overflow: hidden; overscroll-behavior: none; }
html.qr-dialog-open #qr-dialog { overflow-y: auto; overscroll-behavior: contain; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}