:root {
  color-scheme: light dark;
  --background: #f2f2f7;
  --surface: rgba(255, 255, 255, 0.72);
  --text: #171719;
  --secondary: #66666c;
  --line: rgba(23, 23, 25, 0.1);
  --accent: #008f84;
  --overtime: #c7740a;
  --shadow: 0 26px 80px rgba(18, 27, 31, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0d0f10;
    --surface: rgba(31, 33, 35, 0.78);
    --text: #f5f5f7;
    --secondary: #aaaab0;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #24c9bb;
    --overtime: #f0a23a;
    --shadow: 0 28px 90px rgba(0, 0, 0, 0.42);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 72% 8%, color-mix(in srgb, var(--accent) 13%, transparent), transparent 30rem),
    var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

.shell {
  width: min(72rem, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 5rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 680;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand img {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 0.65rem;
}

.nav { display: flex; align-items: center; gap: 1.25rem; }
.nav a { color: var(--secondary); text-decoration: none; }
.nav a:hover, .nav a:focus-visible { color: var(--text); }
.language { padding-left: 1.25rem; border-left: 1px solid var(--line); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(18rem, 0.7fr);
  gap: clamp(2.5rem, 8vw, 7rem);
  align-items: center;
  min-height: calc(100vh - 5rem);
  padding-block: 5rem;
}

.eyebrow {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

h1, h2, h3 { margin: 0; line-height: 1.08; letter-spacing: -0.045em; }
h1 { max-width: 12ch; margin-top: 1rem; font-size: clamp(3.2rem, 8vw, 7.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.02em; }

.lede {
  max-width: 38rem;
  margin: 1.75rem 0 0;
  color: var(--secondary);
  font-size: clamp(1.12rem, 2vw, 1.4rem);
}

.availability { display: inline-flex; align-items: center; gap: 0.65rem; margin-top: 2rem; font-weight: 650; }
.availability::before { content: ""; width: 0.65rem; height: 0.65rem; border-radius: 50%; background: var(--overtime); }

.mark-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 28rem;
}

.mark-stage::before {
  content: "";
  position: absolute;
  width: 18rem;
  height: 18rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: 0 0 0 4rem color-mix(in srgb, var(--accent) 4%, transparent), 0 0 0 8rem color-mix(in srgb, var(--accent) 3%, transparent);
}

.mark-stage img {
  position: relative;
  width: min(18rem, 68vw);
  border-radius: 22%;
  box-shadow: var(--shadow);
}

.features { padding-block: 7rem; border-top: 1px solid var(--line); }
.features-intro { display: flex; justify-content: space-between; gap: 2rem; align-items: end; }
.features-intro p { max-width: 35rem; margin: 0; color: var(--secondary); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 3rem; }
.card { min-height: 14rem; padding: 1.6rem; background: var(--surface); border: 1px solid var(--line); border-radius: 1.6rem; backdrop-filter: blur(24px); }
.card p { color: var(--secondary); margin: 0.8rem 0 0; }
.number { display: block; margin-bottom: 3.25rem; color: var(--accent); font-variant-numeric: tabular-nums; }

.document { width: min(46rem, calc(100% - 2rem)); margin: 5rem auto 8rem; }
.document h1 { max-width: none; font-size: clamp(2.8rem, 7vw, 5rem); }
.document h2 { margin-top: 3.25rem; font-size: 1.65rem; }
.document p, .document li { color: var(--secondary); }
.document strong { color: var(--text); }
.document .updated { margin-top: 1rem; }
.document a { color: var(--accent); text-underline-offset: 0.2em; }
.document ul { padding-left: 1.25rem; }

.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding-block: 2rem; border-top: 1px solid var(--line); color: var(--secondary); }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-links a { text-decoration: none; }

@media (max-width: 760px) {
  .site-header { align-items: flex-start; padding-block: 1rem; }
  .nav { gap: 0.75rem; flex-wrap: wrap; justify-content: flex-end; font-size: 0.9rem; }
  .language { padding-left: 0.75rem; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 4rem 6rem; }
  .mark-stage { grid-row: 1; min-height: 21rem; }
  .mark-stage::before { width: 13rem; height: 13rem; }
  .features-intro, .site-footer { align-items: flex-start; flex-direction: column; }
  .feature-grid { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  .number { margin-bottom: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}