/* KuarkTek — single insight post */
body.single-post-page {
  min-width: 320px;
  overflow-x: hidden;
  background: var(--surface);
  color: var(--ink);
}

.single-post-page .nav .knob { opacity: 0; }
.single-post-page main {
  min-height: 100vh;
  min-height: 100svh;
  padding-top: var(--space-120);
  padding-bottom: var(--space-90);
}

.single-post-shell {
  width: calc(100% - 60px);
  max-width: var(--w-shell);
  margin-inline: auto;
}

.single-post-hero {
  margin-top: var(--space-60);
  margin-bottom: 0;
}
.single-post-hero__heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--gap-8);
  align-items: end;
  margin-bottom: var(--space-30);
}
.single-post-hero h1 {
  max-width: 980px;
  margin: 0;
  color: var(--ink);
  font-size: var(--fs-display-lg);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tight);
  line-height: var(--lh-display);
  text-wrap: balance;
}

.single-post-hero__meta {
  display: flex;
  min-height: 40px;
  align-items: flex-start;
  justify-content: flex-end;
  gap: var(--gap-2);
}
.single-post-hero__pill {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: rgba(31, 37, 43, .1);
  color: var(--ink);
  font-size: var(--fs-micro);
  font-style: normal;
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-normal);
  line-height: var(--lh-none);
  text-transform: uppercase;
}
.single-post-hero__category {
  border: 0;
  font-family: inherit;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

@media (hover: hover) {
  .single-post-hero__category:hover {
    background: var(--brand);
    color: var(--white);
  }
}
.single-post-hero__category:focus-visible {
  background: var(--brand);
  color: var(--white);
  outline: 2px solid var(--brand);
  outline-offset: var(--gap-hair);
}

.single-post-featured {
  position: relative;
  width: calc(100% - 60px);
  max-width: none;
  height: 75svh;
  margin-block: 0;
  max-height: 900px;
  min-height: 560px;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: var(--white);
  margin-top: var(--space-60);
}
.single-post-featured > img:not(.project__distortion-layer) {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.01);
  transition: transform var(--dur-slower) var(--ease);
}

.project__distortion-layer {
  --distort-position-x: 50%;
  --distort-position-y: 50%;
  --distort-shift-x: 0px;
  --distort-shift-y: 0px;
  position: absolute;
  inset: -4%;
  z-index: 1;
  width: 108%;
  max-width: none;
  height: 108%;
  object-fit: cover;
  opacity: 0;
  pointer-events: none;
  transform: translate3d(var(--distort-shift-x), var(--distort-shift-y), 0) scale(1.045);
  transition: opacity var(--dur-fast) var(--ease);
  will-change: transform, opacity;
  -webkit-mask-image: radial-gradient(circle 24% at var(--distort-position-x) var(--distort-position-y), #000 0%, rgba(0, 0, 0, .9) 42%, rgba(0, 0, 0, .35) 72%, transparent 100%);
  mask-image: radial-gradient(circle 24% at var(--distort-position-x) var(--distort-position-y), #000 0%, rgba(0, 0, 0, .9) 42%, rgba(0, 0, 0, .35) 72%, transparent 100%);
}
.project__distortion-layer--secondary {
  opacity: 0;
  -webkit-mask-image: radial-gradient(circle 15% at var(--distort-position-x) var(--distort-position-y), #000 0%, rgba(0, 0, 0, .75) 58%, transparent 100%);
  mask-image: radial-gradient(circle 15% at var(--distort-position-x) var(--distort-position-y), #000 0%, rgba(0, 0, 0, .75) 58%, transparent 100%);
}
.project__distortion-layer.is-active { opacity: .92; }
.project__distortion-layer--secondary.is-active { opacity: .62; }
.project__distortion-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
  transform: scale(1.01);
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-slower) var(--ease);
}
.project__distortion-canvas.is-ready { opacity: 1; }

.single-post-content {
  --single-post-list-indent: 15px;
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 1fr);
  gap: var(--gap-16);
  align-items: start;
  padding-top: var(--space-60);
  padding-bottom: var(--space-90);
}
.single-post-content__body {
  width: 100%;
  max-width: none;
  color: var(--ink);
}
.single-post-toc {
  position: sticky;
  top: var(--space-120);
  align-self: start;
}
.single-post-toc__sticky {
  max-height: none;
  overflow: visible;
}
.single-post-toc__title {
  margin: 0;
}
.single-post-toc nav {
  display: grid;
  gap: var(--gap-4);
  padding: var(--space-30);
  border-radius: var(--r-md);
  background: var(--white);
}
.single-post-toc__group {
  padding-bottom: var(--gap-4);
  border-bottom: 1px solid var(--line);
}
.single-post-toc__group summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--fs-body);
  align-items: start;
  gap: var(--gap-2);
  padding: 0;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: color var(--dur-fast) var(--ease);
}
.single-post-toc__group summary::-webkit-details-marker { display: none; }
.single-post-toc__group summary:hover { color: var(--brand); }
.single-post-toc__group[open] summary { color: var(--brand); }
.single-post-toc__group summary > a,
.single-post-toc__standalone {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-normal);
  line-height: var(--lh-body);
  transition: color var(--dur-fast) var(--ease);
}
.single-post-toc__toggle {
  display: grid;
  width: var(--fs-body);
  height: var(--fs-body);
  align-self: start;
  place-items: center;
  margin-top: var(--gap-1);
  transition: transform var(--dur-fast) var(--ease);
}
.single-post-toc__toggle svg {
  display: block;
  width: var(--fs-body);
  height: var(--fs-body);
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}
.single-post-toc__group[open] .single-post-toc__toggle { transform: rotate(180deg); }
.single-post-toc__standalone {
  display: block;
  margin: 0;
  padding: 0 0 var(--gap-4);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}
.single-post-toc nav > :last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.single-post-toc__children {
  display: grid;
  gap: var(--gap-4);
  padding: var(--gap-4) 0 0 var(--gap-4);
}
.single-post-toc__children a {
  padding: var(--gap-4) 0 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: var(--fs-tag);
  font-weight: var(--fw-body);
  letter-spacing: var(--ls-normal);
  line-height: var(--lh-body);
  transition: color var(--dur-fast) var(--ease);
}
.single-post-toc a:hover,
.single-post-toc a.is-active {
  color: var(--brand);
}
.single-post-toc__group summary > a:hover,
.single-post-toc__group summary > a.is-active {
  color: var(--brand);
}
.single-post-content h1,
.single-post-content h2,
.single-post-content h3,
.single-post-content h4,
.single-post-content h5,
.single-post-content h6 {
  width: 100%;
  max-width: none;
  margin: var(--space-60) 0 var(--gap-6);
  color: var(--ink);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-snug);
  text-wrap: wrap;
}
.single-post-content h1 { font-size: var(--fs-display-lg); line-height: var(--lh-display); }
.single-post-content h2 { font-size: var(--fs-h2); line-height: var(--lh-heading); }
.single-post-content h3 { font-size: var(--fs-h3); line-height: var(--lh-heading); }
.single-post-content h4 { font-size: var(--fs-h2); line-height: var(--lh-heading); }
.single-post-content h5 { font-size: var(--fs-h3); line-height: var(--lh-heading); }
.single-post-content h6 { font-size: var(--fs-h4); line-height: var(--lh-heading); }
.single-post-content__body > :first-child { margin-top: 0; }
.single-post-content p,
.single-post-content li {
  color: var(--muted);
  font-size: var(--fs-lead);
  font-weight: var(--fw-body);
  letter-spacing: var(--ls-snug);
  line-height: var(--lh-reading);
}
.single-post-content .section-label {
  color: var(--ink);
  font-size: var(--fs-body);
  font-weight: var(--fw-medium);
  line-height: var(--lh-body);
}
.single-post-content p { margin: 0 0 var(--gap-6); }
.single-post-content ul,
.single-post-content ol {
  display: grid;
  gap: var(--gap-3);
  margin: 0 0 var(--gap-8);
  margin-left: var(--single-post-list-indent);
  padding-left: 0;
  list-style: none;
}
.single-post-content li {
  display: flex;
  align-items: flex-start;
  gap: var(--gap-3);
  padding-left: 0;
}
.single-post-content li > .section-label__icon {
  margin-top: var(--gap-2);
  background: var(--muted);
}
.single-post-content strong { color: var(--ink); font-weight: var(--fw-bold); }
.single-post-content em { font-style: italic; }
.single-post-content__body a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--brand);
  text-underline-offset: var(--gap-1);
  transition: color var(--dur-fast) var(--ease);
}
.single-post-content__body a:hover { color: var(--brand); }
.single-post-content blockquote {
  margin: var(--space-60) 0;
  padding: var(--gap-6);
  border-left: var(--gap-1) solid var(--brand);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--white);
}
.single-post-content blockquote p {
  margin: 0;
  color: var(--ink);
  font-size: var(--fs-lead);
}
.single-post-content figure { margin: var(--space-60) 0; }
.single-post-content img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-md);
}
.single-post-content hr {
  width: 100%;
  height: 1px;
  margin: var(--space-30) 0;
  border: 0;
  background: var(--line);
}
.single-post-content code {
  padding: var(--gap-1) var(--gap-2);
  border-radius: var(--r-xs);
  background: var(--white);
  color: var(--ink);
  font-size: var(--fs-sm);
}

.single-post-related {
  padding-top: var(--space-30);
  padding-bottom: 0;
}
.single-post-related__header { margin-bottom: var(--space-60); }
.single-post-related__header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-6);
}
.single-post-related__header-row .section-label { align-items: center; }
.single-post-related__grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: 350px;
}

@media (hover: hover) {
  .single-post-featured:hover > img:not(.project__distortion-layer),
  .single-post-featured:hover > .project__distortion-canvas { transform: scale(1.035); }
}

@media (min-width: 1500px) {
  .single-post-shell { max-width: var(--w-shell-wide); }
  .single-post-featured { max-width: none; }
}

@keyframes single-post-enter {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.single-post-hero h1,
.single-post-hero__meta,
.single-post-featured { animation: single-post-enter .8s var(--ease) both; }
.single-post-hero__meta { animation-delay: .08s; }
.single-post-featured { animation-delay: .14s; }

@media (max-width: 1024px) {
  .single-post-hero h1 { font-size: var(--fs-display-lg); }
  .single-post-featured { min-height: 500px; }
}

@media (max-width: 980px) {
  .single-post-related__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .single-post-content {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-8);
  }
  .single-post-toc { order: 1; }
  .single-post-content__body { order: 2; }
  .single-post-toc { position: static; }
  .single-post-toc__sticky { max-height: none; overflow-y: visible; }
}

@media (max-width: 700px) {
  .single-post-page main { padding-top: var(--space-120); padding-bottom: var(--space-90); }
  .single-post-shell { width: calc(100% - 40px); }
  .single-post-hero { margin-bottom: var(--space-30); }
  .single-post-hero__heading {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-30);
    margin-bottom: var(--space-30);
  }
  .single-post-hero h1 {
    max-width: none;
    font-size: clamp(var(--fs-display-sm), 13vw, var(--fs-display-lg));
    line-height: var(--lh-display);
  }
  .single-post-hero__meta { min-height: 0; flex-wrap: wrap; justify-content: flex-start; }
  .single-post-featured {
    height: 62svh;
    min-height: 440px;
    border-radius: var(--r-md);
  }
  .single-post-content { padding-top: var(--space-60); padding-bottom: var(--space-60); }
  .single-post-content h1 { font-size: var(--fs-display-sm); }
  .single-post-content h2 { font-size: var(--fs-h2); }
  .single-post-content h3 { font-size: var(--fs-h3); }
  .single-post-related { padding-top: var(--space-30); padding-bottom: 0; }
  .single-post-related__header { margin-bottom: var(--space-30); }
  .single-post-related__header-row { align-items: flex-start; flex-direction: column; }
  .single-post-related__grid { display: grid; grid-template-columns: minmax(0, 1fr); grid-auto-rows: 520px; }
}

@media (prefers-reduced-motion: reduce) {
  .single-post-hero h1,
  .single-post-hero__meta,
  .single-post-featured { animation: none; }
  .single-post-featured > img,
  .project__distortion-canvas { transition-duration: .01ms; }
}