:root {
  --bg: #080a0e;
  --bg-raised: #0d1117;
  --ink: #e8e5df;
  --muted: #8b919b;
  --faint: #5c626b;
  --signal: #6fe3a4;
  --rule: rgba(232, 229, 223, 0.12);
  --rule-strong: rgba(232, 229, 223, 0.22);
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --measure: 44rem;
}

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background:
    radial-gradient(1100px 600px at 72% -10%, rgba(111, 227, 164, 0.07), transparent 60%),
    radial-gradient(900px 500px at 8% 0%, rgba(92, 130, 200, 0.06), transparent 62%),
    var(--bg);
  min-height: 100vh;
}

.sky {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(232, 229, 223, 0.7), transparent 100%),
    radial-gradient(1px 1px at 27% 62%, rgba(232, 229, 223, 0.5), transparent 100%),
    radial-gradient(1px 1px at 41% 31%, rgba(232, 229, 223, 0.6), transparent 100%),
    radial-gradient(1px 1px at 58% 74%, rgba(232, 229, 223, 0.4), transparent 100%),
    radial-gradient(1px 1px at 66% 22%, rgba(232, 229, 223, 0.55), transparent 100%),
    radial-gradient(1px 1px at 79% 55%, rgba(232, 229, 223, 0.45), transparent 100%),
    radial-gradient(1px 1px at 88% 12%, rgba(232, 229, 223, 0.6), transparent 100%),
    radial-gradient(1px 1px at 94% 81%, rgba(232, 229, 223, 0.4), transparent 100%),
    radial-gradient(1px 1px at 33% 88%, rgba(232, 229, 223, 0.35), transparent 100%),
    radial-gradient(1px 1px at 71% 91%, rgba(232, 229, 223, 0.4), transparent 100%);
  background-repeat: no-repeat;
}

main,
.site-header,
.site-footer {
  position: relative;
  z-index: 1;
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
  box-sizing: border-box;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(8, 10, 14, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 1rem;
}

.wordmark {
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}

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

.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  z-index: 30;
}

/* Home */

.home {
  padding: 1rem 0 2rem;
}

.hero {
  padding: clamp(3rem, 9vw, 7rem) 0 2.5rem;
  max-width: 54rem;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 1.4rem;
}

.hero-title {
  font-size: clamp(3rem, 9vw, 6.2rem);
  font-weight: 300;
  line-height: 0.94;
  letter-spacing: -0.035em;
  margin: 0 0 1.6rem;
}

.hero-lede {
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  line-height: 1.35;
  font-weight: 400;
  max-width: 40ch;
  margin: 0 0 1.3rem;
  color: var(--ink);
}

.hero-body {
  max-width: 62ch;
  color: var(--muted);
  margin: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.2rem;
}

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85rem 1.25rem;
  border: 1px solid var(--signal);
  background: var(--signal);
  color: #05130c;
  border-radius: 2px;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--rule-strong);
}

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

.trace {
  display: block;
  width: 100%;
  height: 68px;
  margin-top: 3rem;
  overflow: visible;
}

.trace path {
  fill: none;
  stroke: var(--signal);
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  animation: draw 2.6s cubic-bezier(0.22, 1, 0.36, 1) 0.2s forwards;
}

@keyframes draw {
  to { stroke-dashoffset: 0; }
}

/* Section headings */

.home h2 {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 4.5rem 0 1.4rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--rule);
}

.home h2:first-of-type {
  margin-top: 3rem;
}

.home p,
.home li {
  max-width: 66ch;
}

.home p a,
.home li a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 227, 164, 0.32);
}

.home p a:hover,
.home li a:hover {
  border-bottom-color: var(--signal);
}

.home ul {
  padding-left: 1.1rem;
}

.home li {
  margin: 0.45rem 0;
}

/* Frame cards */

.frames {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin: 0 0 1rem;
}

@media (max-width: 860px) {
  .frames {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .frames {
    grid-template-columns: 1fr;
  }
}

.frame {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.5rem;
  background: var(--bg);
  text-decoration: none;
  color: var(--ink);
  transition: background 0.18s ease;
}

.frame:hover {
  background: #0f141b;
}

.frame-num {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.frame-title {
  font-size: 1.28rem;
  line-height: 1.25;
  font-weight: 500;
}

.frame-note {
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--muted);
}

/* Essay */

.essay {
  max-width: var(--measure);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
}

.essay-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 1.2rem;
}

.lede {
  font-size: 1.2rem;
  line-height: 1.45;
  color: var(--muted);
  margin: 0 0 2.6rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--rule);
}

.prose {
  font-size: 1.06rem;
  line-height: 1.72;
}

.prose p {
  margin: 0 0 1.25em;
}

.prose h2 {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 3.2em 0 1.2em;
  padding-top: 1.1em;
  border-top: 1px solid var(--rule);
}

.prose strong {
  font-weight: 600;
  color: #fff;
}

.prose em {
  color: var(--ink);
}

.prose a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 227, 164, 0.32);
}

.prose a:hover {
  border-bottom-color: var(--signal);
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
  margin: 0 0 1.4em;
}

.prose li {
  margin: 0.5em 0;
}

.prose blockquote {
  margin: 2em 0;
  padding: 0.2em 0 0.2em 1.4em;
  border-left: 2px solid var(--signal);
  color: var(--muted);
  font-style: italic;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.82em;
  background: rgba(232, 229, 223, 0.07);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.prose pre {
  background: var(--bg-raised);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1.1rem 1.2rem;
  overflow-x: auto;
  font-size: 0.84rem;
  line-height: 1.6;
  margin: 0 0 1.6em;
}

.prose pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3em 0;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 6rem;
  padding: 2rem 0 3rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--faint);
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
}

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

/* Back link */

.back {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}

.back:hover {
  color: var(--ink);
}

/* Responsive */

@media (max-width: 640px) {
  body {
    font-size: 17.5px;
  }

  .wrap {
    padding: 0 20px;
  }

  .site-header .wrap {
    min-height: 58px;
  }

  .nav {
    gap: 1rem;
  }

  .nav a {
    font-size: 0.65rem;
  }

  .hero-title {
    font-size: clamp(2.6rem, 14vw, 4rem);
  }

  .essay {
    padding-top: 2.5rem;
  }

  .prose {
    font-size: 1.02rem;
  }
}

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

  .trace path {
    animation: none;
    stroke-dashoffset: 0;
  }

  .btn {
    transition: none;
  }
}