:root {
  --bg: #e8e7e3;
  --fg: #131313;
  --muted: #74746f;
  --soft: #62625d;
  --line: #171717;
  --panel-text: #5f5f5a;
  --sidebar-width: 25rem;
  --footer-height: 5rem;
  --footer-hover: #e0b0c8;
  --sidebar-hover: #d9e5eb;
  --sidebar-link-hover: rgba(151, 181, 196, 0.28);
  --thesis-hover: rgb(203, 230, 187);
  --thesis-highlight: rgba(191, 177, 137, 0.18);
  --learn-hover: #faf09a;
  --learn-highlight: rgba(137, 164, 151, 0.22);
  --transition: 160ms ease;
  --slow-transition: 520ms ease;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--fg);
}

body {
  font-family: "Inter", system-ui, sans-serif;
}

button,
a {
  font: inherit;
}

img {
  display: block;
}

.site-frame {
  min-height: 100vh;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(18rem, var(--sidebar-width)) minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr) var(--footer-height);
}

.sidebar,
.panel,
.footer-bar {
  background: var(--bg);
}

.sidebar {
  grid-column: 1;
  grid-row: 1;
  border-right: 2px solid var(--line);
  padding: 2.2rem 2.35rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  transition: background-color var(--slow-transition);
}

.sidebar:hover {
  background: var(--sidebar-hover);
}

.sidebar-top {
  display: grid;
  gap: 1rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.09em;
}

.sidebar-title {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.sidebar-subtitle {
  margin: -0.35rem 0 0;
  max-width: 19rem;
  color: var(--fg);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(1.02rem, 1.15vw, 1.32rem);
  line-height: 1.32;
  font-weight: 400;
  letter-spacing: -0.025em;
}

.sidebar-note {
  margin: 0;
  max-width: 18.5rem;
  color: var(--soft);
  font-size: 0.98rem;
  line-height: 1.58;
}

.nav-groups {
  display: grid;
  gap: 2rem;
}

.nav-group {
  display: grid;
  gap: 0.42rem;
}

.nav-heading {
  margin: 0 0 0.48rem;
  font-size: 0.98rem;
  font-weight: 600;
}

.nav-link {
  display: inline-block;
  width: fit-content;
  margin-left: -0.28rem;
  padding: 0.08rem 0.28rem 0.12rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--fg);
  text-decoration: none;
  font-size: clamp(1.48rem, 1.55vw, 2rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
  cursor: pointer;
  transition: color var(--transition), background-color var(--transition), opacity var(--transition);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--fg);
  background: var(--sidebar-link-hover);
  opacity: 1;
  outline: none;
}

.resource-group a:hover,
.resource-group a:focus-visible,
.text-link:hover,
.text-link:focus-visible {
  opacity: 0.62;
  outline: none;
}

.nav-link.is-active {
  background: rgba(19, 19, 19, 0.045);
  text-decoration: underline;
  text-underline-offset: 0.14em;
}

.sidebar:hover .nav-link.is-active {
  background: rgba(151, 181, 196, 0.18);
}

.panel {
  grid-column: 2;
  grid-row: 1;
  min-height: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-gutter: stable;
  padding: clamp(0.85rem, 1.45vh, 1.45rem) 4.5vw clamp(0.9rem, 1.65vh, 1.55rem);
  transition: background-color var(--slow-transition);
}

.panel[data-active-panel="thesis"]:hover {
  background: var(--thesis-hover);
}

.panel[data-active-panel="learn"]:hover {
  background: var(--learn-hover);
}

.panel:focus,
.panel:focus-visible {
  outline: none;
}

.panel-view {
  width: min(55rem, 100%);
  margin-block: auto;
  overflow: visible;
  text-align: center;
  color: var(--panel-text);
}

.panel-view[hidden] {
  display: none;
}

.panel-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-title {
  margin: 0;
  color: var(--muted);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(1.62rem, 4.2vw, 3.25rem);
  line-height: 1.01;
  font-weight: 400;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}

.panel-subtitle {
  margin: 1.2rem auto 1.45rem;
  max-width: 43rem;
  font-size: clamp(1.06rem, 1.42vw, 1.38rem);
  line-height: 1.35;
  font-weight: 600;
}

.panel-copy {
  display: grid;
  gap: 1rem;
}

.panel-copy p,
.panel-action {
  margin: 0;
  font-size: clamp(1.05rem, 1.3vw, 1.35rem);
  line-height: 1.7;
  font-weight: 500;
}

.text-link {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.12em;
}

.panel-view--thesis {
  width: min(72rem, 100%);
}

.panel-view--learn {
  width: min(62rem, 100%);
}

.panel-view--thesis .panel-kicker,
.panel-view--thesis .panel-title {
  text-align: center;
}

.panel-view--thesis .panel-kicker {
  margin-bottom: 0.28rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

.thesis-abstract {
  width: min(68rem, 100%);
  margin: 0.75rem auto 0;
  padding: clamp(0.78rem, 1vw, 1.08rem) clamp(0.9rem, 1.45vw, 1.45rem);
  border-left: 3px solid rgba(19, 19, 19, 0.72);
  background: rgba(232, 231, 227, 0.34);
  text-align: left;
  transition: background-color var(--slow-transition), border-color var(--slow-transition);
}

.panel[data-active-panel="thesis"]:hover .thesis-abstract {
  border-left-color: rgba(128, 109, 59, 0.52);
  background: rgba(255, 252, 239, 0.2);
}

.thesis-abstract::before {
  display: none;
}

.abstract-header {
  padding: 0 0 0.5rem;
  margin: 0 0 0.58rem;
  border-bottom: 1px solid rgba(19, 19, 19, 0.22);
}

.abstract-eyebrow {
  margin: 0 0 0.2rem;
  color: var(--soft);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.abstract-title {
  margin: 0;
  max-width: 58rem;
  color: var(--fg);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(1.02rem, 1.18vw, 1.28rem);
  line-height: 1.22;
  font-weight: 400;
  letter-spacing: -0.032em;
}

.abstract-body {
  column-count: 2;
  column-gap: clamp(1.15rem, 2vw, 1.85rem);
  column-rule: 1px solid rgba(19, 19, 19, 0.15);
}

.abstract-item {
  display: block;
  margin: 0 0 0.42rem;
  padding: 0;
  border: 0;
  break-inside: avoid;
}

.abstract-item:last-child {
  margin-bottom: 0;
}

.abstract-item--conclusion {
  background: transparent;
}

.abstract-item h4 {
  display: inline;
  margin: 0 0.32rem 0 0;
  padding: 0.065rem 0.3rem 0.085rem;
  border: 1px solid rgba(19, 19, 19, 0.2);
  border-radius: 999px;
  color: var(--fg);
  background: rgba(19, 19, 19, 0.055);
  font-size: 0.69rem;
  font-weight: 600;
  letter-spacing: 0.075em;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
}

.abstract-item p {
  display: inline;
  margin: 0;
  color: var(--panel-text);
  font-size: clamp(0.92rem, 0.95vw, 1.01rem);
  line-height: 1.43;
  font-weight: 500;
}

.thesis-actions {
  width: min(68rem, 100%);
  margin: 0.58rem auto 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  text-align: left;
}

.action-card {
  min-height: 3.45rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 0.85rem;
  padding: 0.62rem 0.82rem;
  border: 1.5px solid rgba(19, 19, 19, 0.56);
  color: var(--fg);
  background: rgba(232, 231, 227, 0.34);
  text-decoration: none;
  transition: color var(--transition), border-color var(--transition), transform var(--transition), background-color var(--transition), opacity var(--transition);
}

.action-card:hover,
.action-card:focus-visible {
  background: var(--thesis-highlight);
  border-color: rgba(128, 109, 59, 0.52);
  opacity: 1;
  outline: none;
  transform: translateY(-1px);
}

.action-card--primary {
  border-color: rgba(19, 19, 19, 0.84);
  background: rgba(19, 19, 19, 0.035);
}

.action-card.is-disabled {
  cursor: default;
  color: var(--soft);
  opacity: 0.72;
}

.action-card.is-disabled:hover,
.action-card.is-disabled:focus-visible {
  opacity: 0.72;
  transform: none;
}

.action-card-label,
.action-card-meta {
  display: block;
}

.action-card-label {
  font-size: clamp(0.98rem, 1.04vw, 1.18rem);
  line-height: 1.06;
  font-weight: 600;
  letter-spacing: -0.045em;
}

.action-card-meta {
  margin-top: 0.2rem;
  color: var(--soft);
  font-size: 0.74rem;
  line-height: 1.2;
}

.action-card-mark {
  color: var(--soft);
  font-size: 0.74rem;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-groups {
  margin-top: 0.15rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1.35rem;
  text-align: left;
}

.resource-group {
  border-top: 1.5px solid rgba(19, 19, 19, 0.56);
  padding-top: 0.62rem;
}

.resource-group h3 {
  margin: 0 0 0.42rem;
  color: var(--fg);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.28rem;
}

.resource-group li {
  margin: 0;
}

.resource-group a {
  color: var(--panel-text);
  text-decoration: none;
  font-size: clamp(0.9rem, 0.95vw, 1rem);
  line-height: 1.36;
  transition: color var(--transition), background-color var(--transition), opacity var(--transition);
}

.panel[data-active-panel="learn"] .resource-group {
  transition: background-color var(--transition), border-color var(--transition);
}

.panel[data-active-panel="learn"]:hover .resource-group {
  border-top-color: rgba(76, 112, 96, 0.42);
}

.panel[data-active-panel="learn"] .resource-group a:hover,
.panel[data-active-panel="learn"] .resource-group a:focus-visible {
  color: var(--fg);
  background: var(--learn-highlight);
  opacity: 1;
  outline: none;
}

.resource-author {
  color: var(--fg);
  font-weight: 500;
}

.resource-separator {
  padding: 0 0.28rem;
}

.resource-group em {
  font-style: italic;
}

.footer-bar {
  grid-column: 1 / -1;
  grid-row: 2;
  border-top: 2px solid var(--line);
  display: grid;
  grid-template-columns: minmax(18rem, var(--sidebar-width)) minmax(0, 1fr);
  background: var(--bg);
}

.footer-title {
  display: flex;
  align-items: center;
  padding: 0 2.35rem;
  min-height: 100%;
  border-right: 2px solid var(--line);
  font-size: clamp(1.55rem, 2vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.04em;
  font-weight: 600;
  color: var(--fg);
  background: var(--bg);
  text-decoration: none;
  transition: background-color 1s ease, background 1s ease, opacity var(--transition);
}

.footer-scene {
  --producer-x: 5.2rem;
  --consumer-x: calc(100% - 5.2rem);
  --scene-width: calc(100vw - var(--sidebar-width));
  --bird-travel: calc(var(--scene-width) - 10.4rem);
  --fox-start-offset: 1.65rem;
  --fox-chase-travel: calc((var(--scene-width) - 10.4rem) * 0.42);
  --scene-cycle: 18.4s;
  --label-gap: 1.35rem;
  --label-width: 5rem;
  --track-gap: 6.35rem;
  --track-travel: calc(var(--scene-width) - var(--track-gap) - var(--track-gap));
  position: relative;
  overflow: hidden;
  min-height: 100%;
  background: var(--bg);
  transition: background-color 1s ease, background 1s ease;
}

.footer-bar:hover .footer-scene,
.footer-bar:hover .footer-title {
  background: var(--footer-hover);
}

.footer-title:hover,
.footer-title:focus-visible {
  opacity: 0.72;
  outline: none;
}

.scene-label {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.94rem;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  color: var(--soft);
  z-index: 3;
  will-change: transform, color;
}

.scene-label--producer {
  left: var(--label-gap);
  width: var(--label-width);
  box-sizing: border-box;
  padding-inline: 0.16rem;
  text-align: center;
  animation: producer-pulse var(--scene-cycle) linear infinite;
}

.scene-label--consumer {
  right: var(--label-gap);
  width: var(--label-width);
  box-sizing: border-box;
  padding-inline: 0.16rem;
  text-align: center;
  animation: consumer-pulse var(--scene-cycle) linear infinite;
}

.scene-track {
  position: absolute;
  left: var(--track-gap);
  right: var(--track-gap);
  top: 50%;
  height: 1px;
  background: rgba(19, 19, 19, 0.26);
  transform: translateY(-50%);
}

.event-baseline {
  position: absolute;
  left: var(--track-gap);
  top: 50%;
  z-index: 2;
  width: 0.3rem;
  height: 0.3rem;
  margin-left: -0.15rem;
  margin-top: -0.15rem;
  border-radius: 999px;
  background: var(--fg);
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
  animation: event-baseline-flight var(--scene-cycle) linear infinite;
}

.footer-bar:hover .event-baseline {
  visibility: hidden;
}

.event-bird,
.fox-runner {
  position: absolute;
  top: 50%;
  z-index: 2;
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
  transition: opacity 0.45s ease;
}

.footer-bar:hover .event-bird,
.footer-bar:hover .fox-runner {
  opacity: 1;
}

.footer-bar:hover .event-bird {
  visibility: visible;
}

.event-bird {
  left: var(--producer-x);
  visibility: hidden;
  width: 1.35rem;
  height: 0.95rem;
  margin-left: -0.65rem;
  margin-top: -1rem;
  transform: translateX(0) translateY(0) scaleX(1);
  animation:
    bird-flight var(--scene-cycle) linear infinite,
    bird-flutter 0.5s ease-in-out infinite;
}

.bird-core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0.24rem;
  height: 0.24rem;
  background: var(--fg);
  border-radius: 999px;
  transform: translate(-50%, -50%);
}

.bird-core::after {
  content: "";
  position: absolute;
  left: 100%;
  top: 50%;
  width: 0;
  height: 0;
  border-top: 0.12rem solid transparent;
  border-bottom: 0.12rem solid transparent;
  border-left: 0.18rem solid var(--fg);
  transform: translateY(-50%);
}

.bird-wing {
  position: absolute;
  top: 0.28rem;
  width: 0.55rem;
  height: 0.28rem;
  border-top: 1.5px solid var(--fg);
}

.bird-wing--left {
  left: 0;
  border-radius: 0.5rem 0 0 0;
  transform: rotate(12deg);
}

.bird-wing--right {
  right: 0;
  border-radius: 0 0.5rem 0 0;
  transform: rotate(-12deg);
}

.fox-runner {
  left: calc(var(--producer-x) + var(--fox-start-offset));
  width: 2rem;
  height: 2rem;
  margin-left: -1rem;
  margin-top: -0.34rem;
  transform: translateX(0);
  animation: fox-journey var(--scene-cycle) linear infinite;
}

.footer-fox {
  width: 100%;
  height: 100%;
  filter: saturate(0) brightness(0.08);
  transform-origin: center 70%;
  transform: translateY(0) scaleX(1);
  animation: fox-posture var(--scene-cycle) linear infinite;
}

@keyframes producer-pulse {
  0%, 1.9565%, 100% {
    transform: translateY(-50%) translateX(0);
    color: var(--soft);
  }
  0.4891% {
    transform: translateY(-50%) translateX(-0.04rem);
    color: rgba(120, 92, 104, 0.88);
  }
  0.9783% {
    transform: translateY(-50%) translateX(0.045rem);
    color: rgba(120, 92, 104, 0.9);
  }
  1.4674% {
    transform: translateY(-50%) translateX(-0.03rem);
    color: rgba(120, 92, 104, 0.86);
  }
}

@keyframes consumer-pulse {
  0%, 27.3913%, 100% {
    transform: translateY(-50%) translateX(0);
    color: var(--soft);
  }
  27.8804% {
    transform: translateY(-50%) translateX(0.04rem);
    color: rgba(120, 92, 104, 0.88);
  }
  28.3696% {
    transform: translateY(-50%) translateX(-0.045rem);
    color: rgba(120, 92, 104, 0.9);
  }
  28.8587% {
    transform: translateY(-50%) translateX(0.03rem);
    color: rgba(120, 92, 104, 0.86);
  }
  29.4457% {
    transform: translateY(-50%) translateX(0);
    color: var(--soft);
  }
}

@keyframes event-baseline-flight {
  0% {
    opacity: 1;
    transform: translateX(0);
  }
  27.3913% {
    opacity: 1;
    transform: translateX(var(--track-travel));
  }
  28.3696%, 100% {
    opacity: 0;
    transform: translateX(var(--track-travel));
  }
}

@keyframes bird-flight {
  0% {
    opacity: 1;
    transform: translateX(0) translateY(0) scaleX(1);
  }
  27.3913% {
    opacity: 1;
    transform: translateX(var(--bird-travel)) translateY(0) scaleX(1);
  }
  28.3696%, 100% {
    opacity: 0;
    transform: translateX(var(--bird-travel)) translateY(0) scaleX(1);
  }
}

@keyframes bird-flutter {
  0%, 100% {
    margin-top: -1.02rem;
  }
  50% {
    margin-top: -1.18rem;
  }
}
@keyframes fox-journey {
  0% {
    transform: translateX(0);
  }

  24.9457% {
    transform: translateX(calc(var(--fox-chase-travel) * 1.08));
  }

  25.2717% {
    transform: translateX(calc(var(--fox-chase-travel) * 1.096));
  }

  25.9239% {
    transform: translateX(calc(var(--fox-chase-travel) * 1.108));
  }

  26.4674% {
    transform: translateX(calc(var(--fox-chase-travel) * 1.112));
  }

  33.9674% {
    transform: translateX(calc(var(--fox-chase-travel) * 1.112));
  }

  45.7066% {
    transform: translateX(calc(var(--fox-chase-travel) * 0.96));
  }

  54.5109% {
    transform: translateX(calc(var(--fox-chase-travel) * 0.96));
  }

  100% {
    transform: translateX(0);
  }
}

@keyframes fox-posture {
  0% {
    transform: translateY(0) scaleX(1);
  }
  1.4673% {
    transform: translateY(-0.255rem) scaleX(1);
  }
  2.9348% {
    transform: translateY(0.098rem) scaleX(1);
  }
  4.4022% {
    transform: translateY(-0.315rem) scaleX(1);
  }
  5.8696% {
    transform: translateY(0.12rem) scaleX(1);
  }
  7.337% {
    transform: translateY(-0.285rem) scaleX(1);
  }
  8.8044% {
    transform: translateY(0.09rem) scaleX(1);
  }
  10.2717% {
    transform: translateY(-0.255rem) scaleX(1);
  }
  11.7391% {
    transform: translateY(0.098rem) scaleX(1);
  }
  13.2065% {
    transform: translateY(-0.315rem) scaleX(1);
  }
  14.6739% {
    transform: translateY(0.12rem) scaleX(1);
  }
  16.1413% {
    transform: translateY(-0.285rem) scaleX(1);
  }
  17.6087% {
    transform: translateY(0.09rem) scaleX(1);
  }
  19.0761% {
    transform: translateY(-0.21rem) scaleX(1);
  }
  20.5435% {
    transform: translateY(0.075rem) scaleX(1);
  }
  22.0109% {
    transform: translateY(-0.12rem) scaleX(1);
  }
  23.4783% {
    transform: translateY(0.052rem) scaleX(1);
  }
  24.9457% {
    transform: translateY(0) scaleX(1);
  }

  26.4674% {
    transform: translateY(0) scaleX(1);
  }

  33.9674% {
    transform: translateY(0) scaleX(1);
  }

  33.9783% {
    transform: translateY(0) scaleX(-1);
  }

  /* Walking back after losing the event bird. */
  35.4348% {
    transform: translateY(-0.06rem) scaleX(-1);
  }
  36.9022% {
    transform: translateY(0.023rem) scaleX(-1);
  }
  38.3696% {
    transform: translateY(-0.053rem) scaleX(-1);
  }
  39.837% {
    transform: translateY(0.019rem) scaleX(-1);
  }
  41.3044% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  42.7718% {
    transform: translateY(0.021rem) scaleX(-1);
  }
  44.2392% {
    transform: translateY(-0.05rem) scaleX(-1);
  }
  45.7066% {
    transform: translateY(0.019rem) scaleX(-1);
  }

  45.7164% {
    transform: translateY(0) scaleX(1);
  }
  54.5109% {
    transform: translateY(0) scaleX(1);
  }

  54.5207% {
    transform: translateY(0) scaleX(-1);
  }

  /* Jogging back to the start.
     The stride stays active until the runner reaches home, so the return
     reads as a jog rather than a late-cycle slide. */
  55.2935% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  55.9783% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  56.6631% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  57.3479% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  58.0327% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  58.7175% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  59.4023% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  60.0871% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  60.7719% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  61.4567% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  62.1415% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  62.8263% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  63.5111% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  64.1959% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  64.8807% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  65.5655% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  66.2503% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  66.9351% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  67.6199% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  68.3047% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  68.9895% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  69.6743% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  70.3591% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  71.0439% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  71.7287% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  72.4135% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  73.0983% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  73.7831% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  74.4679% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  75.1527% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  75.8375% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  76.5223% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  77.2071% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  77.8919% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  78.5767% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  79.2615% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  79.9463% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  80.6311% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  81.3159% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  82.0007% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  82.6855% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  83.3703% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  84.0551% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  84.7399% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  85.4247% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  86.1095% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  86.7943% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  87.4791% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  88.1639% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  88.8487% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  89.5335% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  90.2183% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  90.9031% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  91.5879% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  92.2727% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  92.9575% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  93.6423% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  94.3271% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  95.0119% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  95.6967% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  96.3815% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  97.0663% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  97.7511% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  98.4359% {
    transform: translateY(0.018rem) scaleX(-1);
  }
  99.1207% {
    transform: translateY(-0.056rem) scaleX(-1);
  }
  99.8055% {
    transform: translateY(0.018rem) scaleX(-1);
  }

  100% {
    transform: translateY(0) scaleX(-1);
  }
}

@media (max-width: 980px) {
  .resource-groups {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .site-frame {
    min-height: 100vh;
    height: auto;
    overflow: visible;
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr) var(--footer-height);
  }

  .sidebar {
    grid-column: 1;
    grid-row: 1;
    border-right: 0;
    border-bottom: 2px solid var(--line);
  }

  .panel {
    grid-column: 1;
    grid-row: 2;
    overflow: visible;
    padding: 2.5rem 1.5rem 3rem;
  }

  .panel-view {
    margin-block: 0;
  }

  .footer-bar {
    grid-template-columns: 1fr;
  }

  .footer-title {
    display: none;
  }
}

@media (max-width: 820px) {
  .panel-view--thesis {
    width: min(44rem, 100%);
  }

  .abstract-body {
    column-count: 1;
    column-rule: 0;
  }
}

@media (max-width: 720px) {
  .thesis-abstract {
    padding-inline: 1.05rem;
  }

  .abstract-title {
    font-size: clamp(1.05rem, 4.2vw, 1.3rem);
  }

  .thesis-actions {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --footer-height: 5.7rem;
  }

  .sidebar {
    padding: 1.65rem 1.35rem;
  }

  .panel {
    padding: 2rem 1.1rem 2.65rem;
  }

  .scene-label {
    font-size: 0.8rem;
  }

  .scene-label--producer {
    left: 0.9rem;
    width: 4.2rem;
    box-sizing: border-box;
    padding-inline: 0.12rem;
    text-align: center;
  }

  .scene-label--consumer {
    right: 0.9rem;
    width: 4.2rem;
    box-sizing: border-box;
    padding-inline: 0.12rem;
    text-align: center;
  }

  .footer-scene {
    --producer-x: 2.15rem;
    --consumer-x: calc(100% - 2.15rem);
    --scene-width: 100vw;
    --bird-travel: calc(var(--consumer-x) - var(--producer-x));
    --fox-chase-travel: calc(var(--bird-travel) * 0.42);
    --label-gap: 0.9rem;
    --label-width: 4.2rem;
    --track-gap: 5rem;
  }

  .scene-track {
    left: var(--track-gap);
    right: var(--track-gap);
  }
}

/* Mobile interaction and layout pass */
@media (max-width: 900px) {
  :root {
    --footer-height: 5.35rem;
  }

  html,
  body {
    min-height: 100%;
    overflow-x: hidden;
  }

  .site-frame {
    min-height: 100svh;
    height: auto;
    overflow: visible;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto var(--footer-height);
  }

  .sidebar {
    padding: clamp(1.15rem, 4.8vw, 1.85rem) clamp(1rem, 5vw, 1.6rem) clamp(1rem, 4vw, 1.35rem);
    gap: clamp(1.05rem, 4vw, 1.45rem);
  }

  .sidebar-top {
    gap: 0.72rem;
  }

  .sidebar-title {
    max-width: 12.6em;
    font-size: clamp(2.05rem, 12vw, 3.7rem);
    line-height: 0.94;
  }

  .sidebar-subtitle {
    max-width: 29rem;
    margin-top: -0.16rem;
    font-size: clamp(0.98rem, 4.15vw, 1.16rem);
    line-height: 1.34;
  }

  .sidebar-note {
    max-width: 31rem;
    font-size: clamp(0.9rem, 3.55vw, 0.98rem);
    line-height: 1.48;
  }

  .nav-groups {
    gap: 0;
  }

  .nav-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
  }

  .nav-link {
    min-height: 2.75rem;
    width: auto;
    margin-left: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 0.78rem 0.6rem;
    border: 1px solid rgba(19, 19, 19, 0.28);
    border-radius: 999px;
    font-size: clamp(1rem, 4.7vw, 1.18rem);
    line-height: 1;
    letter-spacing: -0.025em;
    -webkit-tap-highlight-color: transparent;
  }

  .nav-link.is-active {
    background: rgba(19, 19, 19, 0.075);
    border-color: rgba(19, 19, 19, 0.58);
    text-decoration: none;
  }

  .sidebar:hover .nav-link.is-active {
    background: rgba(19, 19, 19, 0.075);
  }

  .panel {
    grid-column: 1;
    grid-row: 2;
    display: block;
    overflow: visible;
    scrollbar-gutter: auto;
    padding: clamp(1.45rem, 5.4vw, 2.1rem) clamp(1rem, 4.7vw, 1.45rem) clamp(1.65rem, 6vw, 2.4rem);
  }

  .panel-view {
    margin: 0 auto;
  }

  .panel-title {
    font-size: clamp(1.55rem, 9vw, 2.35rem);
    line-height: 1.03;
  }

  .panel-subtitle {
    margin: 0.9rem auto 1.1rem;
    font-size: clamp(1rem, 4.2vw, 1.12rem);
    line-height: 1.42;
  }

  .footer-bar {
    grid-column: 1;
    grid-row: 3;
    min-height: var(--footer-height);
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-scene {
    --scene-width: 100vw;
    --label-gap: clamp(0.65rem, 3.2vw, 0.95rem);
    --label-width: clamp(4rem, 20vw, 4.7rem);
    --track-gap: clamp(4.75rem, 22vw, 5.65rem);
    --producer-x: var(--track-gap);
    --consumer-x: calc(100% - var(--track-gap));
    --bird-travel: calc(var(--scene-width) - var(--track-gap) - var(--track-gap));
    --fox-start-offset: clamp(0.72rem, 3.1vw, 1.1rem);
    --fox-chase-travel: calc(var(--bird-travel) * 0.42);
    --scene-cycle: 18.4s;
    min-height: var(--footer-height);
  }

  .scene-label {
    font-size: clamp(0.72rem, 3.2vw, 0.84rem);
  }

  .scene-label--producer,
  .scene-label--consumer {
    width: var(--label-width);
  }

  .scene-track {
    left: var(--track-gap);
    right: var(--track-gap);
  }

  .event-bird {
    width: 1.18rem;
    height: 0.86rem;
    margin-left: -0.58rem;
  }

  .fox-runner {
    width: 1.7rem;
    height: 1.7rem;
    margin-left: -0.85rem;
  }
}

@media (max-width: 820px) {
  .abstract-body {
    column-count: 1;
    column-gap: 0;
    column-rule: 0;
    display: grid;
    gap: 0.78rem;
  }

  .abstract-item {
    margin: 0;
    padding-top: 0.78rem;
    border-top: 1px solid rgba(19, 19, 19, 0.14);
    break-inside: auto;
  }

  .abstract-item:first-child {
    padding-top: 0;
    border-top: 0;
  }

  .abstract-item h4 {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    margin: 0 0 0.36rem;
  }

  .abstract-item p {
    display: block;
    font-size: clamp(0.96rem, 3.85vw, 1.04rem);
    line-height: 1.56;
  }
}

@media (max-width: 720px) {
  .panel-view--thesis .panel-kicker {
    margin-bottom: 0.22rem;
  }

  .thesis-abstract {
    margin-top: 0.62rem;
    padding: clamp(0.95rem, 4.4vw, 1.18rem);
    border-left: 0;
    border-top: 2px solid rgba(19, 19, 19, 0.58);
    background: rgba(255, 252, 239, 0.14);
  }

  .abstract-header {
    padding-bottom: 0.7rem;
    margin-bottom: 0.72rem;
  }

  .abstract-eyebrow {
    font-size: 0.66rem;
  }

  .abstract-title {
    max-width: 100%;
    font-size: clamp(1.04rem, 5vw, 1.26rem);
    line-height: 1.25;
  }

  .thesis-actions {
    margin-top: 0.72rem;
    gap: 0.55rem;
  }

  .action-card {
    min-height: 3.85rem;
    align-items: center;
    padding: 0.76rem 0.86rem;
  }

  .action-card-label {
    font-size: clamp(1rem, 4.4vw, 1.12rem);
    line-height: 1.12;
  }

  .resource-groups {
    gap: 1rem;
  }

  .resource-group {
    padding-top: 0.76rem;
  }

  .resource-group h3 {
    margin-bottom: 0.38rem;
  }

  .resource-group ul {
    gap: 0;
  }

  .resource-group li + li {
    border-top: 1px solid rgba(19, 19, 19, 0.1);
  }

  .resource-group a {
    display: block;
    padding: 0.56rem 0;
    font-size: clamp(0.96rem, 3.9vw, 1.05rem);
    line-height: 1.42;
  }
}

@media (max-width: 520px) {
  .sidebar-title {
    max-width: 8.6em;
  }

  .nav-group {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.48rem;
  }

  .nav-link {
    width: 100%;
    padding-inline: 0.48rem;
  }

  .panel {
    padding-inline: clamp(0.88rem, 4.2vw, 1.08rem);
  }

  .thesis-abstract {
    padding-inline: clamp(0.86rem, 4vw, 1rem);
  }

  .resource-author,
  .resource-separator,
  .resource-group em {
    display: inline;
  }
}

@media (hover: none), (pointer: coarse) {
  .nav-link:hover,
  .action-card:hover,
  .resource-group a:hover,
  .text-link:hover {
    transform: none;
  }
}

@media (hover: none) and (max-width: 900px) {
  .panel[data-active-panel="thesis"] {
    background: rgba(203, 230, 187, 0.36);
  }

  .panel[data-active-panel="learn"] {
    background: rgba(250, 240, 154, 0.34);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }

  .footer-scene .event-baseline {
    display: none;
  }

  .footer-scene .event-bird,
  .footer-scene .fox-runner {
    opacity: 0.9;
    animation: none !important;
  }

  .event-bird {
    visibility: visible;
    transform: translateX(calc(var(--bird-travel) * 0.52)) translateY(0) scaleX(1);
  }

  .fox-runner {
    transform: translateX(calc(var(--fox-chase-travel) * 0.82));
  }
}

@media (max-width: 900px) {
  .event-baseline {
    display: none;
  }

  .footer-bar .event-bird,
  .footer-bar .fox-runner {
    opacity: 1;
  }

  .footer-bar .event-bird {
    visibility: visible;
  }
}


/* Footer animation rule: desktop is the source of truth. Mobile keeps the same
   choreography, direction, facing, and timing, with only scale and track variables
   changed earlier in the mobile layout rules. */
@media (min-width: 901px) {
  .footer-scene {
    --producer-x: 5.2rem;
    --consumer-x: calc(100% - 5.2rem);
    --scene-width: calc(100vw - var(--sidebar-width));
    --bird-travel: calc(var(--scene-width) - 10.4rem);
    --fox-start-offset: 1.65rem;
    --fox-chase-travel: calc((var(--scene-width) - 10.4rem) * 0.42);
    --scene-cycle: 18.4s;
  }
}

@media (max-width: 900px) {
  .event-bird {
    animation:
      bird-flight var(--scene-cycle) linear infinite,
      bird-flutter 0.5s ease-in-out infinite;
  }

  .fox-runner {
    animation: fox-journey var(--scene-cycle) linear infinite;
  }

  .footer-fox {
    animation: fox-posture var(--scene-cycle) linear infinite;
  }
}

@media (hover: none), (pointer: coarse) {
  .nav-link:hover:not(:focus-visible) {
    background: transparent;
  }

  .nav-link.is-active:hover:not(:focus-visible) {
    background: rgba(19, 19, 19, 0.075);
  }

  .panel[data-active-panel="learn"] .resource-group a:hover:not(:focus-visible) {
    color: var(--panel-text);
    background: transparent;
  }

  .action-card:hover:not(:focus-visible) {
    background: rgba(232, 231, 227, 0.34);
    border-color: rgba(19, 19, 19, 0.56);
  }

  .action-card--primary:hover:not(:focus-visible) {
    background: rgba(19, 19, 19, 0.035);
    border-color: rgba(19, 19, 19, 0.84);
  }
}

@media (max-width: 900px) {
  .scene-label {
    top: 0.72rem;
    transform: none;
    line-height: 1;
  }

  .scene-label--producer,
  .scene-label--consumer {
    animation: none;
  }

  .scene-label--producer {
    text-align: left;
  }

  .scene-label--consumer {
    text-align: right;
  }

  .scene-track {
    top: 63%;
  }

  .event-bird,
  .fox-runner {
    top: 63%;
  }

  .event-bird {
    margin-top: -1.08rem;
  }

  .fox-runner {
    margin-top: 0.02rem;
  }
}