:root {
  --bg: #000;
  --fg: #fff;
  --hal: #e51a1a;
  --cyan: #7ae8ff;
  --dim: #6a6a6a;
  --rule: #1a1a1a;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --display: "Space Grotesk", "Eurostile", "Bahnschrift", "Inter", sans-serif;
  --track: 0.25em;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: color 120ms linear, border-color 120ms linear;
}
a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

/* ───── Nav ───── */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 40px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-size: 12px;
  font-weight: 500;
}
.nav a { border-bottom: none; }
.nav .brand { color: var(--fg); }
.nav .links { display: flex; gap: 36px; }
.nav .links a { color: var(--dim); }
.nav .links a:hover, .nav .links a.active { color: var(--fg); }

/* ───── Layout ───── */
main {
  flex: 1;
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 96px 40px 120px;
  text-align: center;
}

section { margin-bottom: 96px; }
section:last-of-type { margin-bottom: 0; }

.label {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-size: 11px;
  color: var(--dim);
  margin-bottom: 28px;
}

h1, h2, h3 {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-weight: 500;
  margin: 0 0 24px;
}
h1 { font-size: clamp(48px, 7vw, 88px); letter-spacing: 0.18em; line-height: 1.05; }
h2 { font-size: 22px; letter-spacing: var(--track); }
h3 { font-size: 14px; letter-spacing: var(--track); color: var(--dim); }

.tagline {
  font-family: var(--sans);
  font-style: italic;
  color: var(--cyan);
  font-size: 18px;
  text-transform: none;
  letter-spacing: 0;
  margin: 0 0 40px;
}

.lede {
  max-width: 640px;
  margin: 0 auto 40px;
  font-size: 19px;
  color: #e8e8e8;
}

.body-text {
  text-align: left;
  max-width: 680px;
  margin: 0 auto;
}
.body-text p { margin: 0 0 20px; }

/* ───── Monolith ───── */
.monolith {
  width: 56px;
  height: 224px;
  background: #000;
  border: 1px solid #fff;
  margin: 0 auto 56px;
  position: relative;
}

/* ───── App icon hero ───── */
.app-icon {
  display: block;
  width: 160px;
  height: 160px;
  margin: 0 auto 48px;
  border-radius: 36px; /* iOS squircle approximation */
  box-shadow:
    0 24px 64px -16px rgba(0, 0, 0, 0.6),
    0 0 0 1px var(--rule);
}
@media (max-width: 600px) {
  .app-icon { width: 128px; height: 128px; margin-bottom: 36px; border-radius: 28px; }
}

/* ───── CTA ───── */
.cta {
  display: inline-block;
  margin-top: 24px;
  padding: 18px 32px;
  background: var(--hal);
  color: #fff;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-size: 12px;
  font-weight: 500;
  border: none;
  border-bottom: none;
  border-radius: 999px;
  box-shadow: 0 0 0 0 var(--hal);
  transition: box-shadow 200ms ease, transform 100ms ease;
}
.cta:hover {
  color: #fff;
  border-bottom: none;
  box-shadow: 0 0 48px -6px var(--hal);
}
.cta:active { transform: scale(0.98); }

.cta-secondary {
  display: inline-block;
  margin-top: 24px;
  padding: 16px 28px;
  border: 1px solid var(--fg);
  border-radius: 999px;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-size: 12px;
  color: var(--fg);
}
.cta-secondary:hover {
  background: var(--fg);
  color: #000;
  border-color: var(--fg);
  border-bottom-color: var(--fg);
}

/* ───── App cards ───── */
.apps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 64px;
}
.apps .card {
  background: #000;
  padding: 56px 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  border-bottom: none;
  transition: background 200ms linear;
}
.apps .card:hover { background: #0a0a0a; }
.apps .card.reserved { color: var(--dim); cursor: default; pointer-events: none; }
.apps .card .glyph {
  font-family: var(--mono);
  font-size: 32px;
  color: var(--fg);
  margin-bottom: 20px;
  line-height: 1;
}
.apps .card.reserved .glyph { color: var(--dim); }
.apps .card .name {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-size: 18px;
  margin-bottom: 12px;
}
.apps .card .desc {
  font-size: 14px;
  color: var(--dim);
  max-width: 200px;
  line-height: 1.5;
}

@media (max-width: 720px) {
  .apps { grid-template-columns: 1fr; }
}

/* ───── Highlights list ───── */
.highlights {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
  max-width: 680px;
  margin: 0 auto;
  counter-reset: hl;
}
.highlights li {
  counter-increment: hl;
  padding: 28px 0 28px 56px;
  border-top: 1px solid var(--rule);
  position: relative;
}
.highlights li:last-child { border-bottom: 1px solid var(--rule); }
.highlights li::before {
  content: counter(hl, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 30px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--hal);
  letter-spacing: 0.1em;
}
.highlights strong {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: 13px;
  display: block;
  margin-bottom: 8px;
}
.highlights p {
  margin: 0;
  color: #d4d4d4;
  font-size: 15px;
  line-height: 1.55;
}

/* ───── Code block ───── */
pre {
  background: #0a0a0a;
  border: 1px solid var(--rule);
  padding: 28px;
  text-align: left;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  color: #e8e8e8;
  overflow-x: auto;
  max-width: 720px;
  margin: 0 auto;
}
pre .c { color: var(--dim); }

/* ───── Steps (clientAPT getting started) ───── */
.steps {
  text-align: left;
  max-width: 680px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  counter-reset: st;
}
.steps li {
  counter-increment: st;
  padding: 20px 0 20px 56px;
  border-top: 1px solid var(--rule);
  position: relative;
  color: #d4d4d4;
}
.steps li:last-child { border-bottom: 1px solid var(--rule); }
.steps li::before {
  content: counter(st, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 22px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--hal);
}

/* ───── Built with ───── */
.stack {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  max-width: 720px;
  margin: 0 auto;
}
.stack span {
  font-family: var(--mono);
  font-size: 12px;
  padding: 8px 14px;
  border: 1px solid var(--rule);
  color: #d4d4d4;
  border-radius: 999px;
}

/* ───── Footer ───── */
footer {
  border-top: 1px solid var(--rule);
  padding: 40px;
  text-align: center;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-size: 11px;
  color: var(--dim);
}
footer a { color: var(--dim); border-bottom: none; }
footer a:hover { color: var(--fg); }
footer .roman {
  display: inline-block;
  margin-left: 12px;
  color: #4a4a4a;
}

/* ───── Mobile ───── */
@media (max-width: 600px) {
  .nav { padding: 22px 20px; }
  .nav .links { gap: 22px; }
  main { padding: 64px 20px 80px; }
  h1 { font-size: 44px; }
  .monolith { width: 40px; height: 160px; margin-bottom: 40px; }
  section { margin-bottom: 64px; }
}