:root {
  color-scheme: dark;
  --bg: #07131b;
  --surface: #0d2028;
  --surface-2: #11303a;
  --text: #f3fbf8;
  --muted: #a9c2bd;
  --accent: #4cf0c7;
  --accent-strong: #9afbe2;
  --border: rgba(154, 251, 226, 0.2);
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 0%, rgba(76, 240, 199, 0.12), transparent 34rem),
    linear-gradient(180deg, #07131b 0%, #091921 100%);
}

a {
  color: var(--accent-strong);
  text-underline-offset: 0.2em;
}

a:hover {
  color: #ffffff;
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  color: var(--accent);
  box-shadow: 0 0 24px rgba(76, 240, 199, 0.18);
}

.brand-mark svg {
  width: 27px;
  height: 27px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 650;
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent-strong);
}

main {
  padding: 56px 0 72px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.17;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 780px;
  margin-bottom: 20px;
  font-size: clamp(2.35rem, 7vw, 4.8rem);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

h3 {
  margin-bottom: 8px;
  font-size: 1.12rem;
}

p,
li {
  color: var(--muted);
}

.lead {
  max-width: 720px;
  margin: 0;
  font-size: clamp(1.08rem, 2.4vw, 1.28rem);
}

.hero {
  padding: 34px 0 58px;
}

.pulse-line {
  width: 100%;
  height: 90px;
  margin-top: 44px;
  color: var(--accent);
  opacity: 0.72;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card,
.content-block {
  border: 1px solid var(--border);
  border-radius: 22px;
  background: linear-gradient(145deg, rgba(17, 48, 58, 0.86), rgba(10, 29, 37, 0.94));
  box-shadow: var(--shadow);
}

.card {
  display: flex;
  min-height: 220px;
  flex-direction: column;
  padding: 28px;
  text-decoration: none;
}

.card p {
  margin: 0 0 24px;
}

.card strong {
  margin-top: auto;
  color: var(--accent-strong);
}

.content-block {
  padding: clamp(24px, 5vw, 46px);
}

.content-block + .content-block {
  margin-top: 20px;
}

.content-block p:first-of-type {
  margin-top: 0;
}

.content-block p:last-child,
.content-block ul:last-child,
.content-block ol:last-child {
  margin-bottom: 0;
}

.steps {
  display: grid;
  gap: 14px;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.steps li {
  position: relative;
  min-height: 42px;
  padding-left: 54px;
  counter-increment: steps;
}

.steps li::before {
  position: absolute;
  top: -4px;
  left: 0;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--accent-strong);
  content: counter(steps);
  font-weight: 800;
}

.note {
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  border-radius: 0 14px 14px 0;
  background: rgba(76, 240, 199, 0.07);
}

.meta {
  font-size: 0.92rem;
}

.site-footer {
  padding: 28px 0 46px;
  border-top: 1px solid var(--border);
}

.site-footer p {
  margin: 4px 0;
  font-size: 0.92rem;
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  main {
    padding-top: 28px;
  }
}