:root {
  --bg: #f4f8fa;
  --surface: #ffffff;
  --border: #e3eaef;
  --text: #0a0a0a;
  --muted: #4c5a64;
  --faint: #7a8893;
  --accent: #00e5ff;
  --accent-ink: #0e7490;
  --ink: #04060a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "DM Sans", "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(0, 229, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(14, 116, 144, 0.08), transparent 50%),
    var(--bg);
  line-height: 1.65;
}

a {
  color: var(--accent-ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--ink);
}

.wrap {
  width: min(720px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 4rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2.5rem;
}

.brand {
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1rem;
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  box-shadow: 0 12px 40px rgba(4, 6, 10, 0.04);
}

h1 {
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 0.5rem;
}

.meta {
  color: var(--faint);
  font-size: 0.9rem;
  margin: 0 0 1.75rem;
}

h2 {
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 1.75rem 0 0.65rem;
}

p,
li {
  color: var(--muted);
  margin: 0 0 0.85rem;
}

ul {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.35rem;
}

.note {
  background: #eef4f7;
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 0.9rem 1rem;
  margin: 1.25rem 0;
}

.note p {
  margin: 0;
  color: var(--text);
}

.footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--faint);
}

.footer p {
  color: var(--faint);
  margin: 0.35rem 0;
}

ol.steps {
  padding-left: 1.25rem;
}

ol.steps li {
  margin-bottom: 0.75rem;
}