:root {
  color-scheme: dark;
  --ink: #090d0c;
  --panel: #101513;
  --line: #303a34;
  --soft-line: #202923;
  --paper: #eeeae1;
  --muted: #89938b;
  --lime: #d7ff45;
  --cyan: #43c9ff;
  --coral: #ff6b54;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: var(--ink);
}

body {
  color: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
  background-image:
    linear-gradient(var(--soft-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--soft-line) 1px, transparent 1px);
  background-size: 40px 40px;
}

button,
a {
  color: inherit;
  font: inherit;
}

.shell {
  min-height: 100vh;
  padding: 18px;
}

.topbar {
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  background: var(--ink);
  padding: 0 14px;
  font: 700 10px/1 "Courier New", monospace;
  letter-spacing: 0;
}

.identity {
  display: flex;
  gap: 9px;
  align-items: center;
  text-decoration: none;
}

.signal {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 16px var(--lime);
}

.stats {
  color: var(--lime);
}

.stage {
  height: calc(100vh - 78px);
  min-height: 610px;
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(420px, 2fr) minmax(270px, 0.86fr);
  border: 1px solid var(--line);
  border-top: 0;
  background: rgba(9, 13, 12, 0.84);
}

.intro,
.parts-panel {
  position: relative;
  z-index: 2;
  background: rgba(9, 13, 12, 0.92);
}

.intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 28px;
  border-right: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--muted);
  font: 700 9px/1.5 "Courier New", monospace;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: 58px;
  line-height: 0.88;
  letter-spacing: 0;
}

h1 span {
  color: var(--lime);
}

.lede {
  max-width: 270px;
  margin: 34px 0 0;
  color: #aeb7af;
  font-size: 13px;
  line-height: 1.65;
}

.source-card {
  width: min(220px, 100%);
  margin: 24px 0 0;
  border: 1px solid var(--line);
  background: #f4f4f1;
}

.source-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: #f4f4f1;
}

.source-card figcaption {
  margin: 0;
  padding: 8px 10px;
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: var(--muted);
  font: 700 8px/1 "Courier New", monospace;
  letter-spacing: 0;
}

.viewer-source {
  position: absolute;
  z-index: 3;
  right: 14px;
  bottom: 14px;
  width: clamp(90px, 15vw, 140px);
  margin: 0;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  pointer-events: none;
}

.viewer-source figcaption {
  font-size: 7px;
}

.viewport {
  position: relative;
  min-width: 0;
  overflow: hidden;
  background: #070a09;
}

.viewport canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

.viewport canvas:active {
  cursor: grabbing;
}

.toolbar {
  position: absolute;
  z-index: 3;
  top: 14px;
  left: 14px;
  right: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  pointer-events: none;
}

.toolbar button {
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font: 700 8px/1 "Courier New", monospace;
  letter-spacing: 0;
  cursor: pointer;
  pointer-events: auto;
}

.toolbar button:hover,
.toolbar button.active {
  border-color: var(--lime);
  color: var(--lime);
}

.loading {
  position: absolute;
  z-index: 5;
  inset: 0;
  display: grid;
  place-content: center;
  background: #070a09;
  transition: opacity 220ms ease, visibility 220ms ease;
}

.loading.done {
  opacity: 0;
  visibility: hidden;
}

.loading-copy {
  width: min(330px, 70vw);
  display: flex;
  justify-content: space-between;
  color: var(--paper);
  font: 700 9px/1 "Courier New", monospace;
  letter-spacing: 0;
}

.loading-copy strong {
  color: var(--lime);
}

.loading-track {
  height: 2px;
  margin-top: 12px;
  overflow: hidden;
  background: var(--line);
}

.loading-track i {
  display: block;
  width: 0;
  height: 100%;
  background: var(--lime);
}

.parts-panel {
  min-width: 0;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
  overflow: hidden;
}

.panel-heading {
  min-height: 116px;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 20px 16px;
  border-bottom: 1px solid var(--line);
}

.panel-heading .eyebrow {
  margin-bottom: 7px;
}

h2 {
  margin: 0;
  font-size: 19px;
  line-height: 1.05;
  letter-spacing: 0;
}

.part-count {
  color: var(--lime);
  font: 700 20px/1 "Courier New", monospace;
}

.part-story {
  min-height: 126px;
  margin: 0;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  color: #aeb7af;
  font-size: 11px;
  line-height: 1.7;
}

.parts-list {
  flex: 1;
  overflow: auto;
  scrollbar-color: var(--line) transparent;
}

.part-button {
  width: 100%;
  min-height: 43px;
  display: grid;
  grid-template-columns: 24px 1fr auto;
  align-items: center;
  gap: 8px;
  border: 0;
  border-bottom: 1px solid var(--soft-line);
  background: transparent;
  padding: 0 13px;
  color: #aeb7af;
  text-align: left;
  cursor: pointer;
}

.part-button:hover,
.part-button.active {
  color: var(--paper);
  background: var(--panel);
}

.part-button.active {
  box-shadow: inset 2px 0 var(--lime);
}

.part-index,
.part-meta {
  color: var(--muted);
  font: 700 8px/1 "Courier New", monospace;
  letter-spacing: 0;
}

.part-button.active .part-index,
.part-button.active .part-meta {
  color: var(--lime);
}

.part-name {
  overflow: hidden;
  font-size: 10px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 1040px) {
  .stage {
    grid-template-columns: minmax(190px, 0.65fr) 2fr minmax(230px, 0.75fr);
  }

  .intro {
    padding: 20px;
  }

  .lede {
    font-size: 11px;
  }

  h1 {
    font-size: 50px;
  }
}

@media (max-width: 780px) {
  .shell {
    padding: 0;
  }

  .topbar {
    border-left: 0;
    border-right: 0;
  }

  .stats {
    display: none;
  }

  .stage {
    height: auto;
    min-height: calc(100vh - 42px);
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto 62vh minmax(260px, auto);
    border-left: 0;
    border-right: 0;
  }

  .intro {
    display: block;
    padding: 22px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  h1 {
    font-size: 46px;
  }

  .lede {
    max-width: 520px;
    margin-top: 18px;
  }

  .source-card {
    width: min(180px, 100%);
    margin-top: 16px;
  }

  .viewer-source {
    right: 10px;
    bottom: 10px;
    width: 92px;
    margin: 0;
  }

  .parts-panel {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .parts-list {
    max-height: 300px;
  }

  .part-story {
    min-height: 0;
  }

}