/* The scroll story: a sticky graphic beside (or, on phones, above) the
   steps. Colours come from the tokens in /site.css, so both themes apply.
   Without JavaScript the graphic is hidden and the steps read as a list. */

.story {
  --stage-bg: #0C1016;
  --node-bg: #141A23;
  --chip-bg: #0C1016;
  --reused-line: color-mix(in srgb, var(--cyan) 42%, var(--line));
  position: relative;
  padding-top: 72px;
  border-top: 1px solid var(--line-soft);
}

:root[data-theme="light"] .story {
  --stage-bg: #F8FAFC;
  --node-bg: #FFFFFF;
  --chip-bg: #FFFFFF;
  --reused-line: color-mix(in srgb, var(--cyan) 45%, var(--line));
}

.story-head {
  max-width: 820px;
  margin: 0 auto 8px;
  text-align: center;
}

.story-head p:not(.kicker) {
  max-width: 640px;
  margin: 16px auto 0;
  color: var(--dim);
  font-size: 18px;
}

.story-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.story-aside {
  display: none;
}

.story-steps {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 0 24px;
}

.story-step {
  padding: 28px 0;
}

.step-k {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--green);
  font: 600 12.5px/1.2 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.step-k b {
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 24px;
  padding: 0 6px;
  border: 1px solid color-mix(in srgb, var(--green) 50%, transparent);
  border-radius: 7px;
  background: color-mix(in srgb, var(--green) 9%, transparent);
  font-weight: 700;
  letter-spacing: 0;
}

.story-step h3 {
  font-size: clamp(25px, 2.5vw, 32px);
  letter-spacing: -0.03em;
  line-height: 1.15;
  text-wrap: balance;
}

.story-step p:not(.step-k) {
  margin-top: 14px;
  color: var(--dim);
  font-size: 17.5px;
  line-height: 1.65;
}

.story-step p code {
  padding: 0.1em 0.38em;
  border: 1px solid var(--line-soft);
  border-radius: 6px;
  background: var(--panel2);
  color: var(--ice);
  font-size: 0.84em;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.step-code {
  margin: 18px 0 0;
  padding: 11px 14px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--code-bg);
  color: var(--ice);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.step-code .t-prompt {
  color: var(--green);
}

.step-code .t-dim {
  color: var(--faint);
}

/* ---------- With JavaScript: the sticky stage ---------- */

.js .story-aside {
  position: sticky;
  top: var(--header);
  z-index: 5;
  display: block;
  height: calc(100vh - var(--header));
  height: calc(100svh - var(--header));
  padding: 20px 0;
}

.js .story-steps {
  max-width: 500px;
  margin: 0;
  padding: 12vh 0 34vh;
}

.js .story-step {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 72vh;
  min-height: 72svh;
  padding: 0;
  /* Added to the page's 80px scroll-padding-top: a step link lands with the step centred. */
  scroll-margin-top: max(0px, calc(14vh - 80px));
  transition: opacity 0.4s ease;
}

.story-ready .story-step:not(.is-active) {
  opacity: 0.45;
}


@media (min-width: 761px) {
  .js .story-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 56px;
  }
}

@media (min-width: 761px) and (max-width: 1060px) {
  .js .story-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 32px;
  }
}

.stage {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    radial-gradient(var(--dot) 1.1px, transparent 1.3px) 0 0 / 26px 26px,
    var(--stage-bg);
  box-shadow: 0 24px 70px var(--shadow);
  font-family: var(--mono);
}

.stage-top {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 0 230px 0 16px;
  border-bottom: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  color: var(--dim);
  font-size: 12.5px;
}

.stage-step {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
  white-space: nowrap;
}

.stage-step b {
  color: var(--green);
  font-weight: 700;
}

.stage-step span {
  overflow: hidden;
  color: var(--text);
  font-weight: 600;
  text-overflow: ellipsis;
}

.stage-canvas {
  position: relative;
  flex: 1;
  min-height: 0;
}

.stage-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  overflow: visible;
  transition: opacity 0.18s ease;
}

.stage-svg.is-fading {
  opacity: 0;
}

.stage-meter {
  display: grid;
  gap: 10px;
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  color: var(--dim);
  font-size: 12px;
}

.meter-counts {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin: 0;
}

.meter-counts div {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.meter-counts dt {
  color: var(--faint);
}

.meter-counts dd {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.meter-counts .m-exec dd { color: var(--green); }
.meter-counts .m-reuse dd { color: var(--cyan); }
.meter-counts .m-human dd { color: var(--amber); }

.meter-cost {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 14px;
}

.meter-cost .meter-track {
  flex: 1 1 140px;
}

.meter-track {
  position: relative;
  height: 8px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--line-soft);
}

.meter-track i {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.meter-track .bar-naive {
  background: repeating-linear-gradient(-45deg, color-mix(in srgb, var(--dim) 45%, transparent) 0 3px, transparent 3px 6px);
}

.meter-track .bar-exec {
  background: var(--green);
}

.meter-cost p {
  color: var(--faint);
  white-space: nowrap;
}

.meter-cost p b {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.meter-cost p b.c {
  color: var(--green);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--faint);
  font-size: 11.5px;
}

.legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend svg {
  width: 26px;
  height: 12px;
  overflow: visible;
}

.legend .lg-chip {
  width: 14px;
  height: 14px;
}

/* The step links sit over the stage's top bar. */
.story-rail {
  position: absolute;
  top: 20px;
  right: 0;
  display: flex;
  align-items: center;
  height: 46px;
  padding: 0 12px;
}

.story-rail ol {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.story-rail a {
  display: grid;
  place-items: center;
  width: 18px;
  height: 26px;
  border-radius: 6px;
  color: transparent;
  font-size: 0;
  text-decoration: none;
}

.story-rail a::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--line);
  transition: background-color 0.2s, transform 0.2s;
}

.story-rail a:hover::before {
  background: var(--dim);
}

.story-rail a[aria-current="step"]::before {
  background: var(--green);
  transform: scale(1.5);
}

/* ---------- Scroll cue: a vertical bar on the right edge while the story is on screen ---------- */

/* The bar fills as the story advances; the arrow says there is more below. Wide screens
   only, and only with JS (site.js shows it and sets --story-progress). */
.story-scroll {
  display: none;
}

@media (min-width: 761px) {
  .js .story-scroll {
    position: fixed;
    z-index: 20;
    top: 50%;
    right: max(14px, calc((100vw - 1320px) / 2 - 44px));
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--green);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-50%);
    transition: opacity 0.3s ease;
  }
  .js .story-scroll.is-visible {
    opacity: 1;
  }
}

.story-scroll-label {
  font: 600 11.5px/1 var(--mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.story-scroll-track {
  position: relative;
  width: 3px;
  height: 140px;
  overflow: hidden;
  border-radius: 3px;
  background: var(--line);
}

.story-scroll-fill {
  position: absolute;
  inset: 0;
  border-radius: 3px;
  background: var(--green);
  transform: scaleY(var(--story-progress, 0));
  transform-origin: top;
}

.story-scroll-arrow {
  font-size: 16px;
  line-height: 1;
  animation: story-scroll-bob 1.6s ease-in-out infinite;
}

/* At the last step there is nothing further down to scroll to. */
.story-scroll.is-end .story-scroll-arrow {
  visibility: hidden;
}

@keyframes story-scroll-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* ---------- Phones: the stage on top, the steps beneath ---------- */

@media (max-width: 760px) {
  .js .story-grid {
    padding: 0;
  }
  .js .story-aside {
    height: 45vh;
    height: 45svh;
    margin: 0;
    padding: 8px var(--gutter) 10px;
    background: var(--bg);
    box-shadow: 0 10px 18px -12px var(--shadow);
  }
  .js .story-steps {
    max-width: none;
    padding: 2vh var(--gutter) 40vh;
  }
  .js .story-step {
    justify-content: flex-start;
    min-height: 66vh;
    min-height: 66svh;
    padding-top: 18px;
    /* Lands just below the stage (the page adds 80px of scroll-padding-top). */
    scroll-margin-top: calc(45svh - 12px);
  }
  .story-step h3 {
    font-size: 23px;
  }
  .story-step p:not(.step-k) {
    font-size: 16.5px;
  }
  .stage {
    border-radius: 14px;
  }
  .stage-top {
    min-height: 34px;
    padding: 0 160px 0 12px;
    font-size: 11.5px;
  }
  .story-rail {
    top: 8px;
    right: var(--gutter);
    height: 34px;
    padding: 0 8px;
  }
  .story-rail a {
    width: 13px;
  }
  .stage-meter {
    gap: 6px;
    padding: 7px 12px 8px;
  }
  .meter-counts {
    gap: 2px 12px;
    font-size: 11px;
  }
  .meter-counts dd {
    font-size: 13px;
  }
  .meter-counts .m-art,
  .meter-cost p,
  .legend {
    display: none;
  }
  .meter-track {
    height: 4px;
  }
}

/* ---------- The graph ---------- */

.stage-svg text {
  font-family: var(--mono);
  dominant-baseline: central;
}

/* Nodes */
.sn-card {
  fill: var(--node-bg);
  stroke: var(--line);
  stroke-width: 1.3;
  vector-effect: non-scaling-stroke;
  transition: stroke 0.35s, fill 0.35s;
}

.sn-ring {
  fill: none;
  stroke: transparent;
  stroke-width: 2.4;
  vector-effect: non-scaling-stroke;
  transition: stroke 0.35s;
}

.sn-icon path,
.sf-icon path {
  fill: none;
  stroke: var(--dim);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.sn-label {
  fill: var(--text);
  font-size: 12px;
  font-weight: 600;
}

.sn-sub {
  fill: var(--faint);
  font-size: 9.5px;
  letter-spacing: 0.02em;
  transition: fill 0.3s;
}

.sn.k-store .sn-card { stroke: color-mix(in srgb, var(--green) 60%, var(--line)); }
.sn.k-store .sn-icon path { stroke: var(--green); }
.sn.k-ci .sn-card { stroke: color-mix(in srgb, var(--blue) 55%, var(--line)); }
.sn.k-ci .sn-icon path { stroke: var(--blue); }
.sn.k-person .sn-icon path { stroke: var(--amber); }

.sn.is-sketch .sn-card {
  fill: transparent;
  stroke: var(--faint);
  stroke-dasharray: 4 4;
}

.sn.is-sketch .sn-label {
  fill: var(--dim);
}

.sn.is-sketch .sn-ring {
  stroke: color-mix(in srgb, var(--amber) 35%, transparent);
  animation: breathe 2.8s ease-in-out infinite;
}

.sn.ns-reviewed .sn-card { stroke: var(--green); }
.sn.ns-reviewed .sn-ring { stroke: color-mix(in srgb, var(--green) 28%, transparent); }
.sn.ns-reused .sn-card { stroke: var(--reused-line); }
.sn.ns-stale .sn-card { stroke: var(--amber); }
.sn.ns-stale .sn-ring {
  stroke: color-mix(in srgb, var(--amber) 45%, transparent);
  animation: breathe 0.9s ease-in-out infinite;
}
.sn.is-changed .sn-sub { fill: var(--amber); }

/* Frames: a group of Artifacts, or a repository */
.sf-box {
  fill: color-mix(in srgb, var(--panel2) 45%, transparent);
  stroke: var(--line);
  stroke-width: 1.2;
  stroke-dasharray: 5 5;
  transition: stroke 0.35s;
}

.sf.k-repo .sf-box {
  fill: color-mix(in srgb, var(--panel) 70%, transparent);
  stroke-dasharray: none;
}

.sf-label {
  fill: var(--dim);
  font-weight: 600;
}

.sf.k-branch .sf-box {
  fill: color-mix(in srgb, var(--pink) 5%, transparent);
  stroke: color-mix(in srgb, var(--pink) 50%, var(--line));
  stroke-dasharray: 6 4;
}

.sf.k-branch .sf-icon path {
  stroke: var(--pink);
}

.sf.ns-stale .sf-box { stroke: var(--amber); }
.sf.ns-reviewed .sf-box { stroke: color-mix(in srgb, var(--green) 60%, var(--line)); }
.sf.ns-reused .sf-box { stroke: var(--reused-line); }

/* Eval edges: colour and dash by kind */
.se,
.sc {
  --k: var(--blue);
}

.se.k-agent,
.sc.k-agent {
  --k: var(--violet);
}

.se.k-human,
.sc.k-human {
  --k: var(--amber);
}

.se-line {
  fill: none;
  stroke: var(--k);
  stroke-width: var(--w, 1.7);
  stroke-linecap: round;
  transition: stroke-opacity 0.4s;
}

.se.k-agent .se-line {
  stroke-dasharray: 7 5;
}

.se.k-human .se-line {
  stroke-dasharray: 0.5 5;
  stroke-width: calc(var(--w, 1.7) * 1.5);
}

.se.st-reused .se-line {
  stroke-opacity: 0.5;
}

.se.st-stale .se-line {
  stroke-dasharray: 5 5;
  animation: march 0.6s linear infinite;
}

.se-end,
.se-head {
  fill: var(--k);
}

/* A Human review's reviewer: a mark beside its loop, never a node. */
.by-face {
  fill: color-mix(in srgb, var(--amber) 16%, var(--stage-bg));
  stroke: var(--amber);
  stroke-width: 1;
}

.by-initial {
  fill: var(--amber);
  font-size: 8px;
  font-weight: 700;
  text-anchor: middle;
}

.by-name {
  fill: var(--amber);
  font-size: 10px;
  font-weight: 600;
}

/* Verdict chips: the ring is the eval kind, the glyph the verdict state */
.sc-in {
  transform-box: fill-box;
  transform-origin: center;
}

.sc-bg {
  fill: var(--chip-bg);
  stroke: var(--k);
  stroke-width: 1.4;
  transition: fill 0.3s;
}

.sc-g {
  fill: none;
  stroke: var(--k);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transition: opacity 0.25s;
}

.sc.k-agent .g-kind {
  fill: var(--k);
  stroke: none;
}

.sc.st-pending .g-kind { opacity: 1; }
.sc.st-reviewed .g-reviewed { opacity: 1; stroke: var(--green); stroke-width: 1.9; }
.sc.st-reused .g-reused { opacity: 1; stroke: var(--cyan); }
.sc.st-stale .g-stale { opacity: 1; stroke: var(--amber); stroke-width: 2; }
.sc.st-reviewed .sc-bg { fill: color-mix(in srgb, var(--green) 18%, var(--chip-bg)); }
.sc.st-reused .sc-bg { fill: color-mix(in srgb, var(--cyan) 9%, var(--chip-bg)); }
.sc.st-stale .sc-bg {
  fill: color-mix(in srgb, var(--amber) 22%, var(--chip-bg));
  stroke: var(--amber);
}

/* Overlays */
.fl-line {
  fill: none;
  stroke: color-mix(in srgb, var(--dim) 55%, transparent);
  stroke-width: 1.4;
  stroke-dasharray: 2 5;
  stroke-linecap: round;
}

.fl-dot.t-publish { fill: var(--green); }
.fl-dot.t-reuse { fill: var(--cyan); }

.bd-box {
  fill: color-mix(in srgb, var(--amber) 13%, var(--stage-bg));
  stroke: color-mix(in srgb, var(--amber) 60%, transparent);
  stroke-width: 1;
}

.ov-badge.t-reuse .bd-box {
  fill: color-mix(in srgb, var(--cyan) 12%, var(--stage-bg));
  stroke: color-mix(in srgb, var(--cyan) 55%, transparent);
}

.bd-text {
  fill: var(--amber);
  font-weight: 600;
  text-anchor: middle;
}

.ov-badge.t-reuse .bd-text { fill: var(--cyan); }
.ov-badge.t-note .bd-text { fill: var(--dim); }

.ln-box {
  fill: color-mix(in srgb, var(--blue) 6%, transparent);
  stroke: color-mix(in srgb, var(--blue) 35%, transparent);
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.ln-label {
  fill: var(--dim);
  font-weight: 600;
}

.ln-pill {
  fill: color-mix(in srgb, var(--green) 12%, var(--stage-bg));
  stroke: color-mix(in srgb, var(--green) 50%, transparent);
  stroke-width: 1;
}

.ln-text {
  fill: var(--text);
  font-weight: 600;
  text-anchor: middle;
}

.fx-ring {
  fill: none;
  stroke: var(--amber);
  stroke-width: 1.8;
}

.fx-dot {
  fill: var(--amber);
}

@keyframes breathe {
  50% { stroke-opacity: 0.25; }
}

@keyframes march {
  to { stroke-dashoffset: -10; }
}

/* Reduced motion: no marching or breathing; steps crossfade (see graph.js). */
@media (prefers-reduced-motion: reduce) {
  .story .stage-svg {
    transition: opacity 0.18s ease !important;
  }
  .sn-ring,
  .se-line {
    animation: none !important;
  }
}