.cascade-page {
  --cascade-green: #557362;
  --cascade-green-deep: #2f5141;
  --cascade-blue: #687f8a;
  --cascade-ochre: #a8762d;
  --cascade-rust: #93584a;
  --cascade-plum: #735f75;
  --cascade-edge: #aaa79f;
  --cascade-neutral: #b8b5ad;
  --cascade-canvas: #f8f5ee;
  --cascade-surface: color-mix(in srgb, var(--paper-light) 88%, transparent);
  --cascade-dialog-shadow: rgba(31, 34, 30, 0.22);
  --cascade-backdrop: rgba(36, 39, 35, 0.42);
}

html[data-theme="dusk"] .cascade-page {
  --cascade-green: #93aa91;
  --cascade-green-deep: #b4c8b1;
  --cascade-blue: #91a7b3;
  --cascade-ochre: #d3a45f;
  --cascade-rust: #c98270;
  --cascade-plum: #ad8da9;
  --cascade-edge: #817680;
  --cascade-neutral: #91878f;
  --cascade-canvas: #353036;
  --cascade-surface: color-mix(in srgb, var(--paper-light) 90%, transparent);
  --cascade-dialog-shadow: rgba(10, 8, 11, 0.46);
  --cascade-backdrop: rgba(20, 17, 21, 0.68);
}

html[data-theme="dark"] .cascade-page {
  --cascade-green: #8eaa98;
  --cascade-green-deep: #b6cabc;
  --cascade-blue: #8299a5;
  --cascade-ochre: #c8a05c;
  --cascade-rust: #c47868;
  --cascade-plum: #9d879f;
  --cascade-edge: #59645d;
  --cascade-neutral: #69726c;
  --cascade-canvas: #1b201c;
  --cascade-surface: color-mix(in srgb, var(--paper-light) 92%, transparent);
  --cascade-dialog-shadow: rgba(0, 0, 0, 0.56);
  --cascade-backdrop: rgba(6, 8, 7, 0.76);
}

.cascade-hero {
  min-height: calc(100vh - var(--header-height));
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.62fr);
  gap: clamp(48px, 9vw, 132px);
  align-items: center;
  padding-top: clamp(76px, 10vh, 130px);
  padding-bottom: clamp(76px, 10vh, 130px);
}

.cascade-hero h1,
.workbench-heading h2,
.cascade-next h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.cascade-hero h1 {
  font-size: clamp(5.2rem, 11vw, 10.5rem);
  line-height: 0.76;
}

.cascade-lede {
  max-width: 760px;
  margin: 48px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.08rem, 1.7vw, 1.34rem);
  line-height: 1.55;
}

.cascade-lede-secondary {
  max-width: 650px;
  margin-top: 16px;
  font-size: 1rem;
}

.cascade-hero .button { margin-top: 34px; }

.cascade-hero-panel {
  align-self: end;
  border-top: 1px solid var(--ink);
  padding-top: 28px;
}

.prototype-stamp {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.prototype-stamp span,
.cascade-summary dt {
  color: var(--mineral);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.prototype-stamp strong {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 400;
}

.cascade-summary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
}

.cascade-summary div {
  min-height: 118px;
  display: flex;
  flex-direction: column-reverse;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.cascade-summary div:nth-child(odd) {
  padding-right: 20px;
  border-right: 1px solid var(--line);
}

.cascade-summary div:nth-child(even) { padding-left: 20px; }

.cascade-summary dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 2.35rem;
  line-height: 1;
}

.cascade-hero-panel > p {
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.cascade-explainer {
  background: var(--paper-deep);
  border-block: 1px solid var(--line);
}

.cascade-explainer-grid {
  display: grid;
  grid-template-columns: minmax(180px, 0.42fr) minmax(0, 1.58fr);
  gap: 48px;
  padding-top: 42px;
  padding-bottom: 42px;
}

.cascade-explainer-grid .section-number { margin: 4px 0 0; }

.cascade-explainer-grid > p:last-child {
  max-width: 900px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2.1vw, 1.8rem);
  line-height: 1.42;
}

.cascade-workbench {
  padding-top: clamp(88px, 10vw, 148px);
  padding-bottom: clamp(88px, 10vw, 148px);
}

.workbench-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: clamp(42px, 8vw, 112px);
  align-items: end;
}

.workbench-heading .section-number { margin-bottom: 18px; }

.workbench-heading h2 {
  max-width: 900px;
  font-size: clamp(3rem, 6vw, 6.4rem);
  line-height: 0.92;
}

.workbench-heading > p {
  margin: 0;
  color: var(--ink-soft);
}

.cascade-controls {
  margin-top: 62px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--cascade-surface);
}

.cascade-search {
  min-width: min(100%, 360px);
  display: grid;
  gap: 8px;
}

.cascade-search span {
  color: var(--mineral);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.cascade-search input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  padding: 7px 0 9px;
  background: transparent;
  color: var(--ink);
  font: inherit;
}

.cascade-search input:focus { outline: 0; border-color: var(--ink); }
.cascade-search input::placeholder { color: var(--mineral); opacity: 0.75; }

.cascade-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }

.cascade-control,
.evidence-nav button {
  border: 1px solid var(--line);
  padding: 10px 13px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.cascade-control:hover,
.cascade-control:focus-visible,
.evidence-nav button:hover,
.evidence-nav button:focus-visible {
  outline: 0;
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper-light);
}

.cascade-control-accent { border-color: var(--cascade-green); color: var(--cascade-green-deep); }

.cascade-status-row {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 2px;
}

.cascade-legend { display: flex; flex-wrap: wrap; gap: 10px 20px; }

.cascade-legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.legend-line { width: 24px; height: 0; border-top: 2px solid var(--line); }
.legend-active { border-color: var(--cascade-green); }
.legend-alternate { border-top-style: dotted; }
.legend-coin { width: 10px; height: 10px; border-radius: 50%; background: var(--cascade-blue); }
.legend-recovered { background: var(--cascade-ochre); }
.legend-terminated { background: var(--cascade-plum); }
.legend-failed { background: var(--cascade-rust); }

.cascade-live-status { margin: 0; color: var(--mineral); font-size: 0.74rem; text-align: right; }

.cascade-stage {
  position: relative;
  height: min(74vh, 820px);
  min-height: 620px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--cascade-canvas);
  cursor: grab;
  touch-action: none;
}

.cascade-stage.is-dragging { cursor: grabbing; }
.cascade-svg { width: 100%; height: 100%; display: block; }
.cascade-zoom-hint { position: absolute; right: 16px; bottom: 12px; color: var(--mineral); font-size: 0.68rem; pointer-events: none; }

.cascade-edge {
  fill: none;
  stroke: var(--cascade-edge);
  stroke-width: 2.2;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  opacity: 0.88;
}

.cascade-edge.is-alternate { stroke-dasharray: 2 8; opacity: 0.68; }
.cascade-edge.is-active { stroke: var(--cascade-green); stroke-width: 3.4; opacity: 1; }
.cascade-edge.is-recovered { stroke: var(--cascade-ochre); stroke-width: 3.8; opacity: 1; }

.cascade-node { cursor: pointer; outline: 0; }
.cascade-node .coin-hit { fill: transparent; }
.cascade-node .coin-halo { fill: none; stroke: transparent; stroke-width: 5; vector-effect: non-scaling-stroke; }
.cascade-node .coin { fill: var(--cascade-neutral); stroke: var(--cascade-canvas); stroke-width: 4; vector-effect: non-scaling-stroke; transition: r 160ms ease, fill 160ms ease, opacity 160ms ease; }
.cascade-node.is-active .coin { fill: var(--cascade-green); }
.cascade-node.is-recovered .coin { fill: var(--cascade-ochre); }
.cascade-node.is-terminated .coin { fill: var(--cascade-plum); }
.cascade-node.is-failed .coin { fill: var(--cascade-rust); }
.cascade-node.is-current .coin { fill: var(--cascade-green-deep); }
.cascade-node .coin-core { fill: var(--paper-light); opacity: 0.85; pointer-events: none; }
.cascade-node.is-message-user .coin-core { opacity: 0; }

.cascade-node:hover .coin,
.cascade-node:focus-visible .coin { r: 19; }
.cascade-node:focus-visible .coin-halo { stroke: var(--ink); }
.cascade-node.is-selected .coin-halo { stroke: var(--ink); }
.cascade-node.is-search-hit .coin-halo { stroke: var(--cascade-ochre); stroke-width: 7; }
.cascade-node.is-dimmed { opacity: 0.18; }
.cascade-node.is-replay .coin-halo { stroke: var(--cascade-ochre); animation: replayPulse 780ms ease both; }

@keyframes replayPulse {
  0% { stroke-width: 2; opacity: 0; }
  45% { stroke-width: 12; opacity: 1; }
  100% { stroke-width: 4; opacity: 0.8; }
}

.cascade-next {
  border-top: 1px solid var(--line);
  background: var(--paper-deep);
}

.cascade-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: clamp(52px, 9vw, 132px);
  padding-top: clamp(86px, 10vw, 142px);
  padding-bottom: clamp(86px, 10vw, 142px);
}

.cascade-next h2 { max-width: 820px; font-size: clamp(3rem, 5.5vw, 6rem); line-height: 0.98; }
.cascade-next-grid > div:last-child { align-self: end; }
.cascade-next-grid > div:last-child p { color: var(--ink-soft); font-size: 1.04rem; }
.cascade-next-grid .button { margin-top: 20px; }

.evidence-dialog {
  width: min(680px, calc(100% - 28px));
  max-height: min(820px, calc(100dvh - 28px));
  margin: auto;
  border: 0;
  padding: 0;
  background: var(--paper-light);
  color: var(--ink);
  box-shadow: 0 36px 120px var(--cascade-dialog-shadow);
}

.evidence-dialog::backdrop { background: var(--cascade-backdrop); backdrop-filter: blur(4px); }
.evidence-dialog-shell { padding: clamp(26px, 5vw, 52px); }

.evidence-dialog-header { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
.evidence-kicker { margin: 0 0 10px; color: var(--mineral); font-size: 0.65rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; }
.evidence-dialog h2 { max-width: 480px; margin: 0; font-family: var(--serif); font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 400; line-height: 1; letter-spacing: -0.04em; }
.evidence-close { border: 0; border-bottom: 1px solid currentColor; padding: 2px 0 4px; background: transparent; color: var(--ink); cursor: pointer; }

.evidence-meta { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 8px; }
.evidence-meta span { border: 1px solid var(--line); padding: 6px 9px; color: var(--ink-soft); font-size: 0.7rem; }

.evidence-dialog blockquote {
  margin: 30px 0 0;
  padding: 24px 0 24px 24px;
  border-block: 1px solid var(--line);
  border-left: 3px solid var(--cascade-green);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.2rem, 2.8vw, 1.65rem);
  line-height: 1.42;
}

.evidence-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px; margin-top: 30px; }
.evidence-grid h3 { margin: 0 0 10px; color: var(--mineral); font-size: 0.66rem; letter-spacing: 0.13em; text-transform: uppercase; }
.evidence-grid p { margin: 0; color: var(--ink-soft); font-size: 0.88rem; }

.evidence-reference { margin-top: 30px; padding: 14px; display: flex; justify-content: space-between; gap: 18px; background: var(--paper-deep); color: var(--ink-soft); font-size: 0.7rem; }
.evidence-reference code { overflow-wrap: anywhere; color: var(--ink); }
.evidence-nav { margin-top: 24px; display: flex; justify-content: flex-end; gap: 8px; }
.evidence-nav button:disabled { opacity: 0.35; cursor: not-allowed; }

@media (max-width: 900px) {
  .cascade-hero,
  .workbench-heading,
  .cascade-next-grid { grid-template-columns: 1fr; }
  .cascade-hero { min-height: auto; }
  .cascade-hero-panel { align-self: auto; }
  .cascade-controls { align-items: stretch; flex-direction: column; }
  .cascade-actions { justify-content: flex-start; }
  .cascade-status-row { align-items: flex-start; flex-direction: column; }
  .cascade-live-status { text-align: left; }
  .cascade-stage { min-height: 600px; height: 72vh; }
}

@media (max-width: 640px) {
  .cascade-hero h1 { font-size: clamp(4.8rem, 27vw, 7.5rem); }
  .cascade-explainer-grid { grid-template-columns: 1fr; gap: 14px; }
  .cascade-summary div { min-height: 102px; }
  .cascade-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cascade-control-accent { grid-column: 1 / -1; }
  .cascade-control { padding-inline: 8px; }
  .cascade-legend { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cascade-stage { min-height: 520px; }
  .cascade-zoom-hint { display: none; }
  .evidence-grid { grid-template-columns: 1fr; gap: 22px; }
  .evidence-reference { flex-direction: column; gap: 5px; }
  .evidence-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  .cascade-node.is-replay .coin-halo { animation: none; }
}