:root {
  --bg: #0b0b0f;
  --ink: #e6eaf0;
  --muted: #8b93a0;
  --line: rgba(176, 196, 220, 0.2);
  --glow: #9eb4cc;
  --serif: "Instrument Serif", "Times New Roman", serif;
  --sans: "Source Sans 3", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.125rem;
  line-height: 1.65;
}

.glow {
  pointer-events: none;
  position: fixed;
  inset: -20vh 0 auto;
  height: 70vh;
  background:
    radial-gradient(ellipse 70% 55% at 50% 0%, rgba(158, 180, 204, 0.16), transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 10%, rgba(90, 120, 160, 0.12), transparent 60%);
  z-index: 0;
}

.wrap {
  position: relative;
  z-index: 1;
  width: min(42rem, calc(100% - 2.5rem));
  margin-inline: auto;
}

.wrap.inset {
  width: 100%;
  margin: 0;
  padding: 0;
}

.nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.5rem 0 0;
}

.brand {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}

nav {
  display: flex;
  gap: 1.25rem;
}

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

nav a:hover,
.foot a:hover {
  color: var(--glow);
}

.hero {
  padding: 5rem 0 2.25rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--glow);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.2;
  text-wrap: balance;
}

p,
.lede,
.quote p,
.split li,
figcaption {
  text-wrap: pretty;
  orphans: 2;
  widows: 2;
}

h1 {
  margin: 0 0 1.5rem;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
}

h1 em {
  font-style: italic;
  color: #c8d4e4;
}

h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.7rem, 4vw, 2.2rem);
}

.lede,
.problem p,
.close p {
  color: #c5ccd6;
}

.lede {
  margin: 0 0 2rem;
  font-size: 1.2rem;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.btn.primary {
  background: var(--glow);
  color: #0e141c;
}

.btn.ghost {
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn.primary:hover {
  filter: brightness(1.06);
}

.btn.ghost:hover {
  border-color: var(--glow);
  color: var(--glow);
}

.frame {
  position: relative;
  z-index: 1;
  display: block;
  width: min(42rem, calc(100% - 2.5rem));
  margin: 0 auto 4.5rem;
}

.frame.wide {
  width: min(42rem, calc(100% - 2.5rem));
}

.frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0.35rem;
  border: 1px solid var(--line);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

.frame figcaption {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
}

.problem,
#how,
.close,
.quote {
  padding: 0 0 4.5rem;
}

.steps {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

.steps li {
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.steps .n {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--glow);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
}

.steps h3 {
  margin: 0 0 0.4rem;
  font-size: 1.45rem;
}

.steps p {
  margin: 0;
  color: var(--muted);
}

code {
  font-size: 0.88em;
  color: #c8d4e4;
}

.quote blockquote {
  margin: 0;
  padding: 1.75rem 0 0;
  border-top: 1px solid var(--line);
}

.quote p {
  font-family: var(--serif);
  font-size: 1.65rem;
  font-style: italic;
  line-height: 1.4;
  color: #c8d4e4;
}

.quote footer {
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.split-visual {
  position: relative;
  z-index: 1;
  width: min(42rem, calc(100% - 2.5rem));
  margin: 0 auto 4.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

.split-visual .frame {
  width: 100%;
  margin: 0;
}

.split {
  list-style: none;
  margin: 0;
  padding: 0;
}

.split li {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.split strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
}

.foot {
  padding: 0 0 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.foot a {
  color: var(--muted);
}

@media (max-width: 640px) {
  nav a:first-child,
  nav a:nth-child(2) {
    display: none;
  }

  .hero {
    padding-top: 3.5rem;
  }

  .quote p {
    font-size: 1.35rem;
  }
}