:root {
  --ink: #e9edf0;
  --muted: #a6afb8;
  --night: #071019;
  --night-soft: #0c1822;
  --line: rgba(218, 229, 235, 0.17);
  --accent: #d7ff73;
  --glow: #70b7c7;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "Avenir Next", Avenir, "Trebuchet MS", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 280px;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% 12%, rgba(68, 129, 145, 0.17), transparent 28rem),
    radial-gradient(circle at 8% 64%, rgba(82, 113, 130, 0.09), transparent 24rem),
    var(--night);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  opacity: 0.22;
  background-image:
    radial-gradient(circle at 13% 19%, #fff 0 1px, transparent 1.5px),
    radial-gradient(circle at 74% 32%, #fff 0 0.8px, transparent 1.3px),
    radial-gradient(circle at 39% 81%, #fff 0 0.7px, transparent 1.2px);
  background-size: 19rem 17rem, 23rem 21rem, 27rem 25rem;
}

a { color: inherit; text-decoration-color: rgba(215, 255, 115, 0.45); text-underline-offset: 0.25em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 2px; }

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 10;
  padding: 0.55rem 0.9rem;
  color: var(--night);
  background: var(--accent);
  transform: translateY(-200%);
}
.skip-link:focus { transform: translateY(0); }

.site-shell { width: min(100% - 3rem, 1180px); margin-inline: auto; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 7.5rem;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-flex;
  gap: 0.7rem;
  align-items: center;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-decoration: none;
  text-transform: uppercase;
}

.mark { width: 0.65rem; height: 0.65rem; border: 1px solid var(--accent); border-radius: 50%; box-shadow: 0 0 1rem rgba(215, 255, 115, 0.4); }

.nav-list { display: flex; gap: clamp(1rem, 3vw, 2.5rem); margin: 0; padding: 0; list-style: none; }
.nav-list a { color: var(--muted); font-size: 0.82rem; text-decoration: none; }
.nav-list a:hover, .nav-list a[aria-current="page"] { color: var(--ink); }
.nav-list a[aria-current="page"] { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 0.55rem; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr);
  align-items: center;
  min-height: 42rem;
  padding: 5rem 0 7rem;
  border-bottom: 1px solid var(--line);
}

.eyebrow { margin: 0 0 1.25rem; color: var(--accent); font-size: 0.72rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; }

h1, h2, h3, p { overflow-wrap: break-word; }
h1, h2, h3 { text-wrap: balance; }

h1 {
  max-width: 12ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(4rem, 9vw, 8.2rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.88;
}

.intro { max-width: 35rem; margin: 2.5rem 0 0; color: var(--muted); font-family: var(--serif); font-size: clamp(1.15rem, 2vw, 1.45rem); line-height: 1.55; }

.orbit-figure { position: relative; justify-self: end; width: clamp(18rem, 31vw, 27rem); aspect-ratio: 1; }
.orbit { position: absolute; border: 1px solid var(--line); border-radius: 50%; }
.orbit-one { inset: 8%; transform: rotate(-18deg) scaleY(0.44); }
.orbit-two { inset: 25%; border-color: rgba(215, 255, 115, 0.28); transform: rotate(38deg) scaleY(0.62); }
.planet { position: absolute; inset: 36%; border-radius: 50%; background: radial-gradient(circle at 32% 28%, #bbdae0, #3e7180 47%, #112834 73%); box-shadow: -1.8rem 1rem 3.5rem rgba(0, 0, 0, 0.65), 0 0 4rem rgba(112, 183, 199, 0.2); }
.moon { position: absolute; top: 25%; right: 13%; width: 0.8rem; height: 0.8rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 1.1rem rgba(215, 255, 115, 0.75); }

.observation {
  display: grid;
  grid-template-columns: 0.25fr 0.75fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  padding: 8rem 0;
  border-bottom: 1px solid var(--line);
}

.section-number { color: var(--glow); font-family: var(--serif); font-size: 1.2rem; }
.observation h2, .notes h2, .prose h2 { margin: 0; font-family: var(--serif); font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 400; line-height: 1.08; }
.article-text p { margin: 0 0 1.5rem; color: #c4cbd0; }
.article-text p:first-child::first-letter { float: left; margin: 0.04em 0.13em 0 0; color: var(--accent); font-family: var(--serif); font-size: 4.3rem; line-height: 0.8; }

.notes { padding: 8rem 0; }
.notes-heading { display: grid; grid-template-columns: 1fr 2fr; align-items: end; margin-bottom: 4rem; }
.notes-heading .eyebrow { align-self: start; }
.note-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.note-grid li { min-height: 19rem; padding: 2rem 2rem 2rem 0; border-right: 1px solid var(--line); }
.note-grid li + li { padding-left: 2rem; }
.note-grid li:last-child { border-right: 0; }
.note-index { color: var(--accent); font-size: 0.7rem; letter-spacing: 0.15em; }
.note-grid h3 { margin: 3rem 0 1rem; font-family: var(--serif); font-size: 1.55rem; font-weight: 400; line-height: 1.2; }
.note-grid p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.closing-thought { padding: 3rem; border: 1px solid var(--line); background: linear-gradient(115deg, rgba(112, 183, 199, 0.08), rgba(215, 255, 115, 0.025)); text-align: center; }
.closing-thought p { margin: 0; font-family: var(--serif); font-size: clamp(1.35rem, 3vw, 2.2rem); font-style: italic; }

.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding: 3.5rem 0; color: var(--muted); font-size: 0.75rem; letter-spacing: 0.05em; }
.site-footer p { margin: 0; }

.text-page { min-height: 42rem; padding: 7rem 0 9rem; }
.page-intro { display: grid; grid-template-columns: 1fr 2fr; column-gap: 2rem; padding-bottom: 6rem; border-bottom: 1px solid var(--line); }
.page-intro h1 { max-width: 14ch; font-size: clamp(3.5rem, 7vw, 6.5rem); }
.page-intro > p:last-child { grid-column: 2; max-width: 37rem; margin: 2.5rem 0 0; color: var(--muted); font-family: var(--serif); font-size: 1.3rem; }
.text-layout { display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; padding-top: 6rem; }
.prose { max-width: 45rem; }
.prose h2 { margin: 0 0 1.5rem; font-size: 2.25rem; }
.prose h2:not(:first-child) { margin-top: 4rem; }
.prose p { color: #c4cbd0; }
.prose .updated { margin-top: 4rem; color: var(--muted); font-size: 0.82rem; }

.error-shell { min-height: 100vh; display: grid; grid-template-rows: auto 1fr auto; }
.error-page { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(3rem, 9vw, 9rem); align-items: center; padding: 5rem 0; }
.error-orbit { display: grid; place-items: center; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; box-shadow: inset 0 0 6rem rgba(112, 183, 199, 0.08); }
.error-orbit span { color: var(--accent); font-family: var(--serif); font-size: clamp(4rem, 10vw, 8rem); }
.error-copy h1 { max-width: 12ch; font-size: clamp(3.4rem, 7vw, 6.5rem); }
.error-copy > p:not(.eyebrow) { max-width: 32rem; margin: 2rem 0; color: var(--muted); }
.text-link { display: inline-block; color: var(--ink); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }

@media (prefers-reduced-motion: no-preference) {
  .moon { animation: breathe 4s ease-in-out infinite; }
  @keyframes breathe { 50% { opacity: 0.55; box-shadow: 0 0 2rem rgba(215, 255, 115, 0.45); } }
}

@media (max-width: 760px) {
  .site-shell { width: min(100% - 2rem, 42rem); }
  .site-header { align-items: flex-start; min-height: auto; padding: 1.5rem 0; }
  .nav-list { gap: 0.75rem; flex-wrap: wrap; justify-content: flex-end; }
  .nav-list a { font-size: 0.72rem; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding: 5rem 0; }
  .orbit-figure { justify-self: center; order: -1; width: min(68vw, 18rem); margin-bottom: 4rem; }
  h1 { font-size: clamp(3.6rem, 18vw, 6rem); }
  .observation { grid-template-columns: 3rem 1fr; padding: 5rem 0; }
  .article-text { grid-column: 2; }
  .notes { padding: 5rem 0; }
  .notes-heading { grid-template-columns: 1fr; }
  .note-grid { grid-template-columns: 1fr; }
  .note-grid li, .note-grid li + li { min-height: auto; padding: 2rem 0 2.5rem; border-right: 0; border-bottom: 1px solid var(--line); }
  .note-grid h3 { margin-top: 1.5rem; }
  .page-intro { grid-template-columns: 1fr; padding-bottom: 4rem; }
  .page-intro > p:last-child { grid-column: 1; }
  .text-layout { grid-template-columns: 3rem 1fr; padding-top: 4rem; }
  .text-page { padding: 5rem 0; }
  .error-page { grid-template-columns: 1fr; padding: 4rem 0; }
  .error-orbit { width: min(66vw, 19rem); }
}

@media (max-width: 480px) {
  .site-header { display: block; }
  .nav-list { justify-content: flex-start; margin-top: 1.3rem; }
  .observation { grid-template-columns: 1fr; gap: 1.25rem; }
  .article-text { grid-column: 1; }
  .text-layout { grid-template-columns: 1fr; }
  .section-number { margin-bottom: 1rem; }
  .closing-thought { padding: 2rem 1.25rem; }
  .site-footer { display: block; }
  .site-footer p + p { margin-top: 0.75rem; }
}