:root {
  --ink: #f4f0e6;
  --muted: rgba(244,240,230,.58);
  --dim: rgba(244,240,230,.14);
  --ground: #10141d;
  --sun: #ffd18b;
  --horizon: #e68b65;
  color-scheme: dark;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--ground); }
body {
  min-height: 100svh;
  margin: 0;
  overflow-x: hidden;
  background: #10141d;
  color: var(--ink);
  font-family: ui-monospace, "SFMono-Regular", "Cascadia Mono", monospace;
  transition: background-color 2s ease;
  -webkit-font-smoothing: antialiased;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 73% 18%, rgba(255,209,139,.13), transparent 27%),
    linear-gradient(155deg, rgba(73,101,126,.23), transparent 47%),
    linear-gradient(to bottom, #151d2b, #171721 57%, #0b0d12);
  transition: filter 2s ease, opacity 2s ease;
}
body[data-light="day"] .atmosphere { filter: saturate(1.06) brightness(1.18); }
body[data-light="civil-twilight"] .atmosphere { filter: sepia(.16) saturate(1.25); }
body[data-light="nautical-twilight"] .atmosphere { filter: hue-rotate(7deg) saturate(.85) brightness(.72); }
body[data-light="astronomical-twilight"] .atmosphere { filter: saturate(.72) brightness(.54); }
body[data-light="night"] .atmosphere { filter: saturate(.5) brightness(.34); }

.meridian-grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .09;
  background-image: repeating-radial-gradient(circle at 26% 31%, transparent 0, rgba(255,255,255,.1) .45px, transparent .8px, transparent 5px);
  mix-blend-mode: soft-light;
}

a { color: inherit; }
:focus-visible { outline: 1px solid var(--sun); outline-offset: 5px; }
.meridian-head, main, .meridian-foot, .no-script { position: relative; z-index: 2; }
.meridian-head {
  position: fixed;
  inset: 0 0 auto;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: max(25px, env(safe-area-inset-top)) clamp(24px, 4vw, 64px) 0;
  font-size: 10px;
  letter-spacing: .2em;
}
.meridian-head > a { font-weight: 600; letter-spacing: .34em; text-decoration: none; }
.solar-status { display: flex; align-items: center; gap: 10px; color: var(--muted); }
.solar-status i { width: 6px; height: 6px; border-radius: 50%; background: rgba(244,240,230,.28); }
.solar-status[data-state="present"] i { background: var(--sun); box-shadow: 0 0 20px rgba(255,209,139,.8); animation: solar-breath 7s ease-in-out infinite; }
.solar-status[data-state="absent"] i { background: #93a8ca; box-shadow: 0 0 16px rgba(147,168,202,.52); }
.solar-status[data-state="unreachable"] { color: rgba(230,139,101,.82); }
.solar-status[data-state="unreachable"] i { background: var(--horizon); }
@keyframes solar-breath { 0%,100% { opacity: .58; transform: scale(.85); } 50% { opacity: 1; transform: scale(1.3); } }

main { width: min(1240px, calc(100% - 48px)); margin: 0 auto; padding: clamp(135px, 20vh, 215px) 0 150px; }
.kicker { margin: 0 0 23px; color: var(--muted); font-size: 10px; line-height: 1.6; letter-spacing: .18em; text-transform: uppercase; }
h1, h2 { font-family: Iowan Old Style, Baskerville, "Times New Roman", serif; font-weight: 400; }
.meridian-hero { min-height: min(690px, 75svh); }
h1 { margin: 0; font-size: clamp(70px, 13vw, 184px); line-height: .76; letter-spacing: -.072em; }
h1 span, h1 em { display: block; }
h1 em { margin-left: clamp(44px, 17vw, 260px); color: rgba(255,209,139,.74); font-weight: 400; }
.dek { width: min(595px, 86%); margin: clamp(58px, 9vh, 98px) 0 0 auto; color: rgba(244,240,230,.72); font-family: Iowan Old Style, Baskerville, "Times New Roman", serif; font-size: clamp(20px, 2.25vw, 28px); line-height: 1.52; }

.observatory { margin: 15px 0 clamp(145px, 20vh, 230px); }
.observatory > header { display: grid; grid-template-columns: .62fr .38fr; gap: clamp(40px, 9vw, 130px); align-items: end; padding-bottom: 48px; border-bottom: 1px solid var(--dim); }
.observatory h2, .distinction h2, .method-card h2 { margin: 0; font-size: clamp(43px, 6.4vw, 86px); line-height: .97; letter-spacing: -.048em; }
.observatory > header > p { margin: 0 0 5px; color: var(--muted); font-size: 10px; line-height: 1.75; letter-spacing: .04em; }
.arc-frame { position: relative; margin-top: 20px; border-bottom: 1px solid var(--dim); }
#solar-arc { display: block; width: 100%; height: clamp(310px, 42vw, 520px); }
.arc-axis { display: flex; justify-content: space-between; padding: 13px 0 17px; color: rgba(244,240,230,.43); font-size: 8px; letter-spacing: .13em; text-transform: uppercase; }
.solar-measures { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); margin: 0; border-bottom: 1px solid var(--dim); }
.solar-measures div { min-width: 0; padding: 25px 18px 28px; border-left: 1px solid var(--dim); }
.solar-measures div:first-child { border-left: 0; }
.solar-measures dt { min-height: 27px; margin-bottom: 13px; color: var(--muted); font-size: 8px; line-height: 1.45; letter-spacing: .12em; text-transform: uppercase; }
.solar-measures dd { margin: 0; overflow: hidden; font-size: clamp(15px, 1.6vw, 21px); font-variant-numeric: tabular-nums; line-height: 1.3; text-overflow: ellipsis; }

.distinction { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, .72fr); gap: clamp(55px, 10vw, 150px); padding: 0 0 clamp(145px, 20vh, 220px); }
.distinction__copy { padding-top: 37px; }
.distinction__copy p { margin: 0 0 1.45em; color: rgba(244,240,230,.65); font-family: Iowan Old Style, Baskerville, "Times New Roman", serif; font-size: clamp(18px, 1.8vw, 22px); line-height: 1.6; }

.method-card { padding: 58px 0 0; border-top: 1px solid var(--dim); }
.method-card h2 { max-width: 760px; }
.method-card dl { margin: 75px 0 0; border-bottom: 1px solid var(--dim); }
.method-card dl div { display: grid; grid-template-columns: minmax(170px, .35fr) 1fr; gap: 35px; padding: 17px 0; border-top: 1px solid var(--dim); }
.method-card dt, .method-card dd { font-size: 10px; line-height: 1.6; letter-spacing: .08em; }
.method-card dt { color: var(--muted); text-transform: uppercase; }
.method-card dd { margin: 0; }
.method-card a { color: var(--sun); text-underline-offset: 6px; }

.meridian-foot { display: flex; justify-content: space-between; gap: 30px; padding: 0 clamp(24px, 4vw, 64px) max(30px, env(safe-area-inset-bottom)); color: rgba(244,240,230,.5); font-size: 9px; letter-spacing: .14em; text-transform: uppercase; }
.meridian-foot nav { display: flex; gap: 28px; }
.meridian-foot a { text-underline-offset: 6px; }
.no-script { width: min(700px, calc(100% - 48px)); margin: 0 auto 40px; color: var(--muted); font-size: 10px; line-height: 1.6; }

@media (max-width: 870px) {
  main { width: min(100% - 40px, 700px); }
  .meridian-hero { min-height: 70svh; }
  h1 { font-size: clamp(72px, 21vw, 135px); }
  h1 em { margin-left: 8vw; }
  .dek { width: 94%; }
  .observatory > header, .distinction { grid-template-columns: 1fr; gap: 36px; }
  .observatory > header > p { max-width: 500px; }
  .solar-measures { grid-template-columns: repeat(2, 1fr); }
  .solar-measures div { border-top: 1px solid var(--dim); }
  .solar-measures div:nth-child(odd) { border-left: 0; }
  .solar-measures div:nth-child(-n+2) { border-top: 0; }
  .solar-measures div:last-child { grid-column: 1 / -1; }
  .distinction__copy { padding-top: 0; }
}

@media (max-width: 610px) {
  .meridian-head { align-items: flex-start; }
  .solar-status { max-width: 150px; justify-content: flex-end; text-align: right; line-height: 1.45; }
  #solar-arc { height: 330px; }
  .method-card dl div { grid-template-columns: 1fr; gap: 7px; }
  .meridian-foot { align-items: flex-end; }
  .meridian-foot > span { display: none; }
  .meridian-foot nav { flex-wrap: wrap; justify-content: flex-end; gap: 15px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}