/* Final editorial and mobile-navigation refinements. */

@media (max-width: 1000px) {
  .site-header nav,
  .article-chrome nav {
    max-height: calc(100dvh - 88px);
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
  }
}

/* The Probability article stays in the site's dark visual world. */
.probability-article {
  --p-navy: #10243b;
  --p-ink: #e7edf3;
  --p-paper: #081522;
  --p-red: #d4474d;
  --p-yellow: #dcc54b;
  --p-green: #58a984;
  --p-blue: #55a4d0;
  background: #06111e;
  color: var(--p-ink);
  position: relative;
}

.reading-progress {
  position: fixed;
  z-index: 140;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.06);
}

.reading-progress i {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(
    90deg,
    var(--p-red, #b85c3e),
    var(--p-yellow, #cda657),
    var(--p-green, #72a28d),
    var(--p-blue, #63bde8)
  );
  box-shadow: 0 0 16px rgba(220, 197, 75, 0.35);
}

.prob-cover {
  min-height: calc(100svh - 74px);
  background: #0d2136;
  isolation: isolate;
}

.prob-cover::after {
  content: "";
  position: absolute;
  z-index: 0;
  inset: -18%;
  pointer-events: none;
  opacity: 0.2;
  background-image:
    radial-gradient(circle, rgba(232, 198, 82, 0.75) 0 1px, transparent 1.45px),
    repeating-linear-gradient(116deg, transparent 0 142px, rgba(91, 174, 219, 0.24) 143px 144px, transparent 145px 304px);
  background-size: 62px 62px, 620px 310px;
  animation: probability-network-flow 34s linear infinite;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 18% 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 18% 90%, transparent);
}

.prob-cover > :not(.prob-cover-art):not(.prob-cover-shade) {
  z-index: 1;
}

.prob-cover-art {
  position: absolute;
  z-index: -2;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.74) contrast(1.06) brightness(0.62);
}

.prob-cover-shade {
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(90deg, #071522 0%, rgba(7, 21, 34, 0.92) 34%, rgba(7, 21, 34, 0.32) 73%, rgba(7, 21, 34, 0.2)),
    linear-gradient(0deg, rgba(4, 12, 22, 0.88), transparent 52%);
}

.prob-body {
  background-color: var(--p-paper);
  background-image:
    radial-gradient(circle, rgba(91, 174, 219, 0.09) 0 1px, transparent 1.35px),
    repeating-linear-gradient(116deg, transparent 0 180px, rgba(77, 158, 205, 0.045) 181px 182px, transparent 183px 370px);
  background-size: 62px 62px, 740px 370px;
  animation: probability-paper-drift 42s linear infinite;
}

.prob-section,
.prob-sources {
  border-bottom-color: rgba(196, 216, 230, 0.15);
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.prob-section::before,
.prob-sources::before,
.prob-author-note::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -25%;
  pointer-events: none;
  opacity: 0.09;
  background-image:
    radial-gradient(circle, rgba(118, 196, 236, 0.78) 0 1px, transparent 1.45px),
    repeating-linear-gradient(116deg, transparent 0 154px, rgba(104, 190, 232, 0.28) 155px 156px, transparent 157px 322px);
  background-size: 58px 58px, 640px 320px;
  animation: probability-network-flow 38s linear infinite;
}

.prob-section:nth-of-type(even)::before {
  animation-direction: reverse;
  opacity: 0.065;
}

.prob-section h2 {
  max-width: 980px;
  text-wrap: balance;
}

.prob-columns p { color: #c6d2dc; }

.prob-callout {
  border-color: color-mix(in srgb, var(--callout) 50%, #243c4f);
  background: rgba(255, 255, 255, 0.035);
}

.prob-callout p {
  color: #e0e7ec;
  border-left-color: rgba(196, 216, 230, 0.15);
}

.prob-metrics { border-color: rgba(196, 216, 230, 0.18); }
.prob-metrics > div { border-right-color: rgba(196, 216, 230, 0.18); }
.final-section { background: #0d2136; }
.prob-sources { background: #091827; }

.prob-source-intro {
  max-width: 760px;
  margin: -10px 0 36px;
  color: #9fb0bc;
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
  font-size: 13px;
  line-height: 1.75;
}

.source-grid { border-color: rgba(196, 216, 230, 0.17); }
.source-grid a {
  border-color: rgba(196, 216, 230, 0.17);
  background: rgba(255, 255, 255, 0.018);
}
.source-grid a:hover { background: rgba(255, 255, 255, 0.055); }
.source-grid strong { color: #edf3f6; }
.source-grid span { color: #8fa2b0; }
.source-grid b { color: #7fc6ed; }

.prob-interlude {
  max-width: none;
  padding: clamp(60px, 7vw, 105px) clamp(28px, 12vw, 185px);
  text-align: center;
  background: #13263c;
  color: white;
  border-block: 1px solid rgba(255, 255, 255, 0.1);
}

.prob-interlude small {
  color: var(--p-yellow);
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.prob-interlude blockquote {
  max-width: 980px;
  margin: 25px auto 0;
  font-size: clamp(27px, 3.2vw, 46px);
  line-height: 1.18;
  font-weight: 400;
  letter-spacing: -0.025em;
}

.red-interlude { box-shadow: inset 0 5px 0 var(--p-red); }
.final-interlude {
  background: #0c1e31;
  box-shadow: inset 0 5px 0 var(--p-yellow);
}

.prob-media-break {
  max-width: none;
  min-height: min(78vh, 760px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(360px, 0.78fr);
  overflow: hidden;
  border-inline: 0;
  border-bottom: 1px solid rgba(196, 216, 230, 0.15);
  background: #0b1c2d;
  position: relative;
  isolation: isolate;
}

.prob-media-break::after {
  content: "";
  position: absolute;
  z-index: 2;
  inset: -20%;
  pointer-events: none;
  opacity: 0.1;
  background-image:
    radial-gradient(circle, rgba(236, 205, 95, 0.9) 0 1px, transparent 1.4px),
    repeating-linear-gradient(116deg, transparent 0 148px, rgba(88, 166, 211, 0.32) 149px 150px, transparent 151px 316px);
  background-size: 62px 62px, 650px 325px;
  animation: probability-network-flow 36s linear infinite;
  -webkit-mask-image: linear-gradient(90deg, transparent 20%, #000 58% 100%);
  mask-image: linear-gradient(90deg, transparent 20%, #000 58% 100%);
}

.prob-media-break > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  min-height: min(78vh, 760px);
  object-fit: cover;
  filter: saturate(0.9) contrast(1.04) brightness(0.88);
}

.prob-media-break figcaption {
  position: relative;
  z-index: 3;
  padding: clamp(40px, 6vw, 82px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(145deg, rgba(14, 34, 54, 0.98), rgba(7, 20, 33, 0.96));
}

.prob-media-break small {
  color: var(--p-yellow);
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.2em;
}

.prob-media-break strong {
  margin: 25px 0 21px;
  font-size: clamp(34px, 3.8vw, 56px);
  line-height: 1.06;
  font-weight: 400;
  letter-spacing: -0.03em;
}

.prob-media-break span {
  max-width: 520px;
  color: #aab9c5;
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
  font-size: 13px;
  line-height: 1.75;
}

.prob-media-break.reverse { grid-template-columns: minmax(360px, 0.78fr) minmax(0, 1.22fr); }
.prob-media-break.reverse > img { order: 2; }
.prob-media-break.reverse figcaption { order: 1; }
.prob-media-break.reverse::after {
  -webkit-mask-image: linear-gradient(90deg, #000 0 45%, transparent 80%);
  mask-image: linear-gradient(90deg, #000 0 45%, transparent 80%);
}

.dream-break small { color: var(--p-yellow); }
.unequal-break small { color: var(--p-green); }
.scales-break small { color: var(--p-red); }
.network-break small { color: var(--p-green); }

.network-break { grid-template-columns: minmax(360px, 0.78fr) minmax(0, 1.22fr); }
.network-break > img {
  object-fit: cover;
  padding: 0;
  background: #102844;
  filter: saturate(0.92) contrast(1.04) brightness(0.88);
}

.prob-ledger-lab {
  padding: clamp(72px, 8vw, 118px) clamp(24px, 8vw, 125px);
  color: #eef4f7;
  background:
    radial-gradient(circle at 82% 22%, rgba(88, 169, 132, 0.13), transparent 26%),
    linear-gradient(145deg, #10283a, #081621 62%);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.prob-ledger-lab::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -22%;
  opacity: 0.12;
  background-image:
    radial-gradient(circle, rgba(220, 197, 75, 0.9) 0 1px, transparent 1.45px),
    repeating-linear-gradient(116deg, transparent 0 134px, rgba(85, 164, 208, 0.32) 135px 136px, transparent 137px 292px);
  background-size: 56px 56px, 590px 295px;
  animation: probability-network-flow 32s linear infinite reverse;
}

.prob-ledger-heading {
  max-width: 1280px;
  margin: 0 auto 52px;
  display: grid;
  grid-template-columns: 1.15fr 0.7fr;
  gap: 7vw;
  align-items: end;
}

.prob-ledger-heading h2 {
  margin: 20px 0 0;
  max-width: 780px;
  font-size: clamp(40px, 4.8vw, 66px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.prob-ledger-heading > p {
  color: #a9bbc6;
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.8;
}

.prob-ledger-interface {
  max-width: 1280px;
  min-height: 500px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 250px 1fr;
  background: rgba(5, 17, 28, 0.86);
  border: 1px solid rgba(196, 216, 230, 0.16);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.24);
}

.prob-ledger-tabs {
  display: flex;
  flex-direction: column;
  padding: 16px;
  background: rgba(8, 35, 48, 0.92);
  border-right: 1px solid rgba(196, 216, 230, 0.12);
}

.prob-ledger-tabs button {
  flex: 1;
  display: grid;
  grid-template-columns: 36px 1fr;
  align-items: center;
  gap: 6px;
  padding: 20px 14px;
  color: #91a8b4;
  text-align: left;
  font: 500 14px Aptos, "Segoe UI", Arial, sans-serif;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(196, 216, 230, 0.1);
  cursor: pointer;
}

.prob-ledger-tabs button span {
  color: var(--p-yellow);
  font-size: 9px;
  letter-spacing: 0.14em;
}

.prob-ledger-tabs button.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(88, 169, 132, 0.17), transparent);
  box-shadow: inset 3px 0 0 var(--p-green);
}

.prob-ledger-tabs button:focus-visible {
  outline: 2px solid var(--p-yellow);
  outline-offset: -2px;
}

.prob-ledger-panel {
  align-content: center;
  padding: clamp(38px, 6vw, 84px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 44px;
}

.prob-ledger-panel > small,
.prob-ledger-panel div small {
  color: #8da4b1;
  font: 800 8px Aptos, "Segoe UI", Arial, sans-serif;
  letter-spacing: 0.18em;
}

.prob-ledger-panel > small { grid-column: 1 / -1; }

.prob-ledger-panel > strong {
  grid-column: 1 / -1;
  padding-bottom: 34px;
  color: #fff;
  font-size: clamp(30px, 3.4vw, 48px);
  font-weight: 400;
  line-height: 1.14;
  letter-spacing: -0.025em;
  border-bottom: 1px solid rgba(196, 216, 230, 0.14);
}

.prob-ledger-panel div p {
  margin: 12px 0 0;
  color: #b8c7cf;
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.75;
}

.prob-author-note {
  display: grid;
  grid-template-columns: 0.55fr 1fr;
  gap: 8vw;
  padding: clamp(60px, 7vw, 95px) max(24px, calc((100vw - 1100px) / 2));
  background: #102235;
  border-top: 1px solid rgba(196, 216, 230, 0.14);
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

@keyframes probability-network-flow {
  from { background-position: 0 0, 0 0; }
  to { background-position: 186px 93px, -325px 162px; }
}

@keyframes probability-paper-drift {
  to { background-position: 124px 62px, -370px 185px; }
}

.prob-author-note h2 {
  margin: 20px 0 0;
  font-size: clamp(34px, 4vw, 50px);
  font-weight: 400;
}

.prob-author-note p {
  color: #adbbc6;
  font-size: 15px;
  line-height: 1.85;
}
.prob-author-note strong { color: white; font-weight: 500; }

/* Keep the dynamic systems language alive through the SSS reading journey. */
.essay-site .opening,
.essay-site .chapter-light,
.essay-site .visuals,
.essay-site .author-note,
.essay-site .follow {
  background-image:
    radial-gradient(circle, rgba(85, 118, 101, 0.085) 0 1px, transparent 1.4px),
    repeating-linear-gradient(116deg, transparent 0 176px, rgba(73, 111, 92, 0.04) 177px 178px, transparent 179px 360px);
  background-size: 64px 64px, 720px 360px;
  animation: essay-surface-drift 48s linear infinite;
}

@keyframes essay-surface-drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 192px 96px, -360px 180px; }
}

/* PoP artwork library: visual depth without turning the article into another long stack. */
.prob-artwork {
  padding: clamp(68px, 8vw, 110px) max(24px, calc((100vw - 1280px) / 2));
  background:
    radial-gradient(circle at 85% 12%, rgba(85, 164, 208, 0.11), transparent 25%),
    #071522;
  border-top: 1px solid rgba(196, 216, 230, 0.14);
  border-bottom: 1px solid rgba(196, 216, 230, 0.14);
  overflow: hidden;
}

.prob-artwork-head {
  display: grid;
  grid-template-columns: 1fr minmax(300px, 0.58fr);
  align-items: end;
  gap: 7vw;
  margin-bottom: 38px;
}

.prob-artwork-head h2 {
  margin: 18px 0 0;
  color: #f1f5f7;
  font-size: clamp(38px, 4.7vw, 62px);
  font-weight: 400;
  line-height: 1.03;
  letter-spacing: -0.035em;
}

.prob-artwork-head > p {
  margin: 0;
  color: #9fb0bc;
  font: 13px/1.75 Aptos, "Segoe UI", Arial, sans-serif;
}

.prob-artwork-track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding: 0 0 16px;
  scroll-snap-type: x mandatory;
  scrollbar-color: rgba(220, 197, 75, 0.58) rgba(255, 255, 255, 0.05);
}

.prob-art-card {
  position: relative;
  flex: 0 0 min(470px, 78vw);
  aspect-ratio: 16 / 10;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(196, 216, 230, 0.16);
  background: #0b1c2d;
  color: white;
  cursor: zoom-in;
  scroll-snap-align: start;
}

.prob-art-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) brightness(0.84);
  transition: transform 0.35s ease, filter 0.35s ease;
}

.prob-art-card:hover img,
.prob-art-card:focus-visible img {
  transform: scale(1.025);
  filter: saturate(0.96) brightness(0.94);
}

.prob-art-card > span {
  position: absolute;
  inset: auto 0 0;
  display: grid;
  gap: 5px;
  padding: 36px 20px 18px;
  text-align: left;
  background: linear-gradient(transparent, rgba(4, 13, 22, 0.93));
}

.prob-art-card small {
  color: var(--p-yellow);
  font: 800 8px Aptos, "Segoe UI", Arial, sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.prob-art-card b {
  font: 400 21px/1.15 Georgia, "Times New Roman", serif;
}

.prob-artwork-hint {
  margin: 8px 0 0;
  color: #708593;
  font: 9px Aptos, "Segoe UI", Arial, sans-serif;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.lightbox.probability-lightbox {
  z-index: 200;
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-columns: 64px 1fr 64px;
  align-items: center;
  padding: 28px;
  color: #fff;
  background: rgba(3, 11, 19, 0.97);
}

.probability-lightbox figure {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-height: 92vh;
  margin: 0;
}

.probability-lightbox figure img {
  max-width: 100%;
  max-height: 82vh;
  object-fit: contain;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.48);
}

.probability-lightbox figcaption {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 17px;
  width: min(100%, 1100px);
  color: #aab9c5;
  font-family: Aptos, "Segoe UI", Arial, sans-serif;
}

.probability-lightbox figcaption small {
  color: #dcc54b;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.probability-lightbox figcaption strong { color: #fff; font-size: 15px; font-weight: 400; }
.probability-lightbox figcaption span { color: #728795; font-size: 10px; }

.probability-lightbox .lightbox-close,
.probability-lightbox .lightbox-arrow {
  position: absolute;
  width: 46px;
  height: 46px;
  color: #fff;
  background: rgba(9, 30, 48, 0.86);
  border: 1px solid rgba(220, 197, 75, 0.42);
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
}

.probability-lightbox .lightbox-close { top: 20px; right: 24px; }
.probability-lightbox .lightbox-arrow { top: 50%; transform: translateY(-50%); }
.probability-lightbox .lightbox-arrow.previous { left: 18px; }
.probability-lightbox .lightbox-arrow.next { right: 18px; }

@media (max-width: 900px) {
  .prob-callout p {
    border-left: 0;
    border-top-color: rgba(196, 216, 230, 0.15);
  }
  .source-grid { grid-template-columns: 1fr; }
  .prob-media-break,
  .network-break { grid-template-columns: 1fr; }
  .prob-media-break.reverse { grid-template-columns: 1fr; }
  .prob-media-break.reverse > img,
  .prob-media-break.reverse figcaption { order: initial; }
  .prob-media-break > img {
    min-height: 360px;
    max-height: 520px;
  }
  .network-break > img { padding: 0; }
  .prob-author-note {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  .prob-artwork-head { grid-template-columns: 1fr; gap: 16px; }
  .prob-ledger-heading { grid-template-columns: 1fr; gap: 18px; }
  .prob-ledger-interface { grid-template-columns: 1fr; }
  .prob-ledger-tabs {
    flex-direction: row;
    padding: 8px;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(196, 216, 230, 0.12);
  }
  .prob-ledger-tabs button {
    min-width: 150px;
    min-height: 76px;
    grid-template-columns: 1fr;
    align-content: center;
    gap: 7px;
    border-bottom: 0;
    border-right: 1px solid rgba(196, 216, 230, 0.1);
  }
  .prob-ledger-tabs button.active { box-shadow: inset 0 -3px 0 var(--p-green); }
}

@media (max-width: 600px) {
  .prob-cover-art { object-position: 62% center; }
  .prob-metrics > div { border-bottom-color: rgba(196, 216, 230, 0.18); }
  .prob-media-break { min-height: 0; }
  .prob-media-break > img { min-height: 290px; }
  .prob-media-break figcaption { padding: 40px 24px 48px; }
  .prob-interlude { padding-left: 24px; padding-right: 24px; }
  .prob-ledger-lab { padding-left: 16px; padding-right: 16px; }
  .prob-ledger-panel { grid-template-columns: 1fr; padding: 34px 22px 42px; }
  .prob-ledger-panel > strong,
  .prob-ledger-panel > small { grid-column: 1; }
  .prob-art-card { flex-basis: 86vw; }
  .lightbox.probability-lightbox { grid-template-columns: 1fr; padding: 68px 14px 20px; }
  .probability-lightbox figure { grid-column: 1; }
  .probability-lightbox figcaption { grid-template-columns: 1fr auto; }
  .probability-lightbox figcaption small { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  .prob-body,
  .prob-cover::after,
  .prob-section::before,
  .prob-sources::before,
  .prob-author-note::before,
  .prob-media-break::after,
  .prob-ledger-lab::before,
  .essay-site .opening,
  .essay-site .chapter-light,
  .essay-site .visuals,
  .essay-site .author-note,
  .essay-site .follow { animation: none; }
}

@media print {
  .reading-progress { display: none; }
}