:root {
  --apricot: #efb57d;
  --violet: #b8a1ec;
  --paper: #eeedf4;
  --article-copy: #c4c8d7;
}

body {
  background:
    radial-gradient(ellipse at 16% 5%, #b47d4810, transparent 31rem),
    radial-gradient(ellipse at 88% 15%, #a482db12, transparent 36rem),
    #090b13;
}

.action-post {
  width: min(100% - 2.5rem, 1000px);
  margin: 0 auto;
  padding: 1.7rem 0 3.5rem;
  color: var(--article-copy);
}

.draft-notice {
  width: fit-content;
  padding: .4rem .85rem;
  margin: 0 auto 2.6rem;
  border: 1px solid #efb57d45;
  border-radius: 5px;
  color: #b9b5b2;
  background: #efb57d06;
  font-size: .78rem;
}
.draft-notice span {
  color: var(--apricot);
  font-weight: 700;
  margin-right: .65rem;
}

.prose { max-width: 710px; margin-inline: auto; }
.post-header { margin-bottom: 2.8rem; }
.opening-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: center;
  gap: 3rem;
}
.opening-copy { min-width: 0; }
.post-header .opening-question {
  max-width: 42ch;
  margin-top: 1.5rem;
  color: var(--apricot);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.16rem;
  line-height: 1.55;
}
.post-header .eyebrow {
  color: var(--violet);
  font-size: .73rem;
  letter-spacing: .16em;
  margin-bottom: 1.1rem;
}
.post-header h1 {
  max-width: 21ch;
  margin: 0 0 1.5rem;
  color: var(--paper);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.6rem, 5.1vw, 4rem);
  font-weight: 400;
  letter-spacing: -.035em;
  line-height: 1.07;
  text-wrap: balance;
}
.post-header .standfirst {
  max-width: 59ch;
  color: #d6d5e1;
  font-size: clamp(1.12rem, 2vw, 1.3rem);
  line-height: 1.65;
}
.action-post section { margin-top: 3.2rem; }
.action-post h2 {
  margin: 0 0 1.2rem;
  color: var(--paper);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 3.1vw, 2.15rem);
  font-weight: 400;
  letter-spacing: -.015em;
  line-height: 1.25;
  scroll-margin-top: 95px;
}
.prose > p, .detail-content > p, .orbit-copy > p {
  font-size: 1.045rem;
  line-height: 1.8;
  margin: 1rem 0;
}
.action-post strong { color: var(--paper); font-weight: 600; }
.action-post math {
  font-family: "Cambria Math", "STIX Two Math", math;
  font-synthesis: none;
}
.action-post math[display="inline"] {
  font-size: 1.12em;
  color: inherit;
  white-space: nowrap;
}
.action-post a:focus-visible,
.action-post summary:focus-visible,
.action-post video:focus-visible,
.equation:focus-visible {
  outline: 2px solid var(--apricot);
  outline-offset: 5px;
}

.image-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.6rem;
  max-width: 880px;
  margin: 2rem auto 2.2rem;
}
.action-post figure { margin: 0; min-width: 0; }
.action-post .two-route-film { max-width: 780px; margin: 1.8rem auto 2.2rem; }
#two-routes { scroll-margin-top: 100px; }
.two-route-film figcaption a { color: var(--violet); text-underline-offset: 3px; }
.action-post figure > a { display: block; }
.action-post figure img,
.action-post figure video {
  display: block;
  width: 100%;
  height: auto;
  background: #020308;
  border: 1px solid #ffffff15;
  border-radius: 10px;
}
.front-pair video { aspect-ratio: 1; object-fit: contain; }
.ray-pair video { aspect-ratio: 1080 / 1236; object-fit: contain; }
.ray-pair { margin-block: 2.5rem 3rem; }
.action-post figcaption {
  margin-top: .85rem;
  color: #a3aabd;
  font-size: .85rem;
  line-height: 1.65;
}
.figure-number {
  color: var(--apricot);
  font-size: .75rem;
  font-weight: 700;
  margin-right: .4rem;
}

.equation {
  overflow-x: auto;
  padding: 1.1rem .4rem;
  margin: 1.25rem 0;
  color: var(--paper);
  font-size: 1.18rem;
  text-align: center;
  scrollbar-color: #70627f #10121c;
}
.equation math {
  min-width: max-content;
  margin: 0;
}
.equation-key {
  padding: 1.55rem .6rem;
  border-top: 1px solid #b8a1ec35;
  border-bottom: 1px solid #b8a1ec35;
  color: #ded1ff;
  font-size: 1.45rem;
  background: #b8a1ec05;
}

.fold-feature {
  max-width: 880px;
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(210px, 1fr);
  align-items: center;
  gap: 2.6rem;
  margin: 2.3rem auto 2.4rem;
}
.fold-notes { padding-bottom: 4rem; }
.margin-title {
  margin: 0 0 1.7rem;
  color: #d1cce0;
  font-size: .73rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .13em;
}
.fold-notes > p:not(.margin-title) {
  position: relative;
  margin: 1.4rem 0;
  padding-left: 1.5rem;
  font-size: .94rem;
  line-height: 1.65;
}
.swatch {
  position: absolute;
  left: 0;
  top: .47em;
  width: .57rem;
  height: .57rem;
  border-radius: 50%;
}
.swatch.apricot { background: var(--apricot); }
.swatch.pearl { background: #f6e7de; box-shadow: 0 0 9px #e7d7ed50; }
.swatch.violet { background: var(--violet); }
.fold-notes > .margin-small {
  border-top: 1px solid #ffffff14;
  padding-top: 1.2rem;
  padding-left: 0 !important;
  color: #a3aabd;
  font-size: .85rem !important;
}

.math-detail {
  margin: 1.1rem 0;
  border: 1px solid #ffffff20;
  border-radius: 8px;
  background: #11141d;
}
.math-detail summary {
  padding: 1rem 1.15rem;
  color: #d3c5ed;
  font-size: .94rem;
  cursor: pointer;
}
.math-detail summary::marker { color: var(--violet); }
.detail-content { padding: 0 1.25rem 1.1rem; }
.detail-content > p { font-size: .98rem; }
.detail-content .equation { font-size: 1.1rem; padding-inline: 0; }
.detail-content .compact-equation { font-size: 1.03rem; }

.orbit-feature {
  max-width: 880px;
  display: grid;
  grid-template-columns: minmax(0, 350px) minmax(0, 1fr);
  gap: 2.8rem;
  align-items: start;
  margin: 2.2rem auto 2.7rem;
}
.orbit-copy > p:first-child { margin-top: 0; }
.orbit-copy > .orbit-note {
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid #ffffff1c;
  color: #a3aabd;
  font-size: .9rem;
  line-height: 1.7;
}
.closing { padding-top: .5rem; }
.prose > .reference {
  margin-top: 2.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid #ffffff20;
  color: #9da7bc;
  font-size: .88rem;
}
.reference a {
  color: var(--violet);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 780px) {
  .action-post { width: min(100% - 2rem, 710px); }
  .opening-layout { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .action-post .opening-film { width: min(100%, 300px); margin-inline: auto; }
  .fold-feature { grid-template-columns: minmax(0, 1.5fr) minmax(180px, 1fr); gap: 1.6rem; }
  .fold-notes { padding-bottom: 0; }
  .orbit-feature { grid-template-columns: minmax(0, 290px) minmax(0, 1fr); gap: 1.7rem; }
  .orbit-copy > p { font-size: .96rem; }
  .image-pair { gap: 1.2rem; }
}
@media (max-width: 590px) {
  .action-post { padding-top: 1.15rem; }
  .draft-notice { margin: 0 0 2.5rem; font-size: .72rem; }
  .draft-notice span { margin-right: .35rem; }
  .post-header { margin-bottom: 2.5rem; }
  .post-header h1 { max-width: 17ch; }
  .post-header .standfirst { font-size: 1.12rem; }
  .action-post section { margin-top: 2.6rem; }
  .prose > p { font-size: 1rem; line-height: 1.75; }
  .image-pair { grid-template-columns: 1fr; max-width: 420px; gap: 1.8rem; }
  .fold-feature, .orbit-feature { grid-template-columns: minmax(0, 1fr); gap: 1.4rem; }
  .fold-notes { padding: .2rem .5rem 0; }
  .fold-notes .margin-title { margin-bottom: 1rem; }
  .orbit-feature > figure { width: min(100%, 350px); margin-inline: auto; }
  .orbit-copy > p { font-size: 1rem; }
  .equation { font-size: 1.02rem; }
  .equation-key { font-size: 1.24rem; }
  .math-detail summary { padding: .9rem; }
  .detail-content { padding: 0 .85rem .8rem; }
  .detail-content .equation { font-size: .95rem; }
  .detail-content .compact-equation { font-size: .92rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}