:root {
  --cascade-bg: #0a0a0f;
  --cascade-bg-1: #111118;
  --cascade-bg-2: #1a1a24;
  --cascade-border: rgba(255, 255, 255, 0.08);
  --cascade-border-hi: rgba(255, 255, 255, 0.16);
  --cascade-text: #e8e8e0;
  --cascade-text-dim: #aaa9a0;
  --cascade-text-faint: #777781;
  --cascade-accent: #f5a623;
  --cascade-accent-hover: #f7b84a;
  --cascade-accent-dim: rgba(245, 166, 35, 0.12);
  --cascade-green: #4ade80;
  --cascade-red: #e24b4a;
  --cascade-node-width: clamp(116px, 13vw, 148px);
}

* { box-sizing: border-box; }
html { background: var(--cascade-bg); }
body.cascade-page {
  margin: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    var(--cascade-bg);
  background-size: 80px 80px;
  color: var(--cascade-text);
  font: 400 14px/1.6 "IBM Plex Mono", monospace;
  overflow-x: hidden;
}

.cascade-page main {
  width: min(calc(100% - 48px), 1100px);
  margin: 0 auto;
  padding: clamp(30px, 4vw, 54px) 0 clamp(92px, 10vw, 132px);
}

.cascade-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px 32px;
  align-items: end;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.cascade-kicker,
.cascade-evidence strong,
.cascade-node__state,
.cascade-node__role,
.cascade-control__label,
.cascade-readout span,
.cascade-menu__label {
  text-transform: uppercase;
  letter-spacing: 0.11em;
}

.cascade-kicker {
  margin: 0 0 7px;
  color: var(--cascade-accent);
  font-size: 0.72rem;
}

.cascade-hero h1 {
  margin: 0;
  font: 400 clamp(2.65rem, 7vw, 5rem)/0.95 "DM Serif Display", serif;
  letter-spacing: -0.04em;
}

.cascade-hero h1 span { color: var(--cascade-accent); }
.cascade-subtitle {
  max-width: 720px;
  margin: 15px 0 0;
  color: var(--cascade-text-dim);
  font-size: clamp(0.86rem, 1.5vw, 1rem);
}

.cascade-evidence {
  max-width: 340px;
  padding: 11px 14px;
  border-left: 2px solid var(--cascade-accent);
  background: rgba(245, 166, 35, 0.055);
  color: var(--cascade-text-dim);
  font-size: 0.72rem;
  line-height: 1.5;
}
.cascade-evidence strong {
  display: block;
  margin-bottom: 2px;
  color: var(--cascade-accent);
  font-size: 0.68rem;
}

.cascade-instrument {
  position: relative;
  border-top: 1px solid var(--cascade-border-hi);
  border-bottom: 1px solid var(--cascade-border);
  background: linear-gradient(180deg, rgba(17, 17, 24, 0.72), rgba(10, 10, 15, 0.48));
}

.cascade-instruction-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 66px;
  padding: 11px 16px;
  border-bottom: 1px solid var(--cascade-border);
}

.cascade-instruction {
  margin: 0;
  color: var(--cascade-text);
  font-size: clamp(0.86rem, 1.5vw, 0.98rem);
}

.cascade-root {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  color: var(--cascade-text-dim);
  font-size: 0.7rem;
  white-space: nowrap;
}
.cascade-root strong { color: var(--cascade-text); font-weight: 500; }

.cascade-topology {
  position: relative;
  min-height: clamp(430px, 58vw, 570px);
  isolation: isolate;
  overflow: hidden;
}

.cascade-topology::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 50%, rgba(245, 166, 35, 0.035), transparent 34%),
    linear-gradient(90deg, transparent 49.92%, rgba(255, 255, 255, 0.035) 50%, transparent 50.08%);
  z-index: 0;
}

.cascade-connections {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 1;
}

.cascade-connection {
  fill: none;
  stroke: rgba(232, 232, 224, 0.18);
  stroke-width: 1.6;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  transition: stroke 180ms ease, stroke-width 180ms ease, opacity 180ms ease;
}

.cascade-connection[data-state="healthy"] {
  stroke-dasharray: 3 14;
  animation: cascade-flow 2.1s linear infinite;
}
.cascade-connection[data-state="pressure"] {
  stroke: var(--cascade-accent);
  stroke-width: 2.2;
  stroke-dasharray: 10 5 2 5;
  animation: cascade-pressure 0.8s linear infinite;
}
.cascade-connection[data-state="degraded"] {
  stroke: rgba(245, 166, 35, 0.58);
  stroke-dasharray: 4 9;
  animation: cascade-flow 3.2s steps(5, end) infinite;
}
.cascade-connection[data-state="failed"] {
  stroke: var(--cascade-red);
  stroke-width: 2;
  stroke-dasharray: 1 8;
  opacity: 0.72;
  animation: none;
}
.cascade-connection[data-state="fallback"] {
  stroke: var(--cascade-accent);
  stroke-width: 2.4;
  stroke-dasharray: 16 6;
  animation: cascade-flow 1s linear infinite;
}
.cascade-connection[data-state="buffering"] {
  stroke: var(--cascade-accent);
  stroke-width: 2.2;
  stroke-dasharray: 2 5 12 5;
  animation: cascade-buffer 1.4s linear infinite;
}

@keyframes cascade-flow { to { stroke-dashoffset: -34; } }
@keyframes cascade-pressure { to { stroke-dashoffset: -22; } }
@keyframes cascade-buffer { to { stroke-dashoffset: -24; } }

.cascade-node {
  --node-x: 50%;
  --node-y: 50%;
  position: absolute;
  left: var(--node-x);
  top: var(--node-y);
  z-index: 3;
  width: var(--cascade-node-width);
  min-height: 76px;
  padding: 11px 12px;
  transform: translate(-50%, -50%);
  border: 1px solid var(--cascade-border-hi);
  border-radius: 6px;
  background: rgba(10, 10, 15, 0.9);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.16);
  color: var(--cascade-text);
  text-align: left;
  font: inherit;
  cursor: default;
  transition: border-color 180ms ease, transform 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

button.cascade-node { cursor: pointer; }
button.cascade-node:hover {
  border-color: rgba(245, 166, 35, 0.55);
  transform: translate(-50%, -50%) translateY(-2px);
}
button.cascade-node:focus-visible,
.cascade-toggle:focus-visible,
.cascade-action:focus-visible,
.cascade-fault-action:focus-visible,
.cascade-menu-close:focus-visible {
  outline: 2px solid var(--cascade-accent);
  outline-offset: 3px;
}

.cascade-node::before,
.cascade-node::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 7px;
  height: 7px;
  border: 1px solid rgba(232, 232, 224, 0.34);
  border-radius: 50%;
  background: var(--cascade-bg);
  transform: translateY(-50%);
}
.cascade-node::before { left: -5px; }
.cascade-node::after { right: -5px; }

.cascade-node__name {
  display: block;
  margin-bottom: 3px;
  color: var(--cascade-text);
  font-size: 0.83rem;
  font-weight: 500;
  letter-spacing: 0.025em;
}
.cascade-node__state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--cascade-green);
  font-size: 0.64rem;
}
.cascade-node__role {
  display: block;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  color: var(--cascade-text-faint);
  font-size: 0.59rem;
  letter-spacing: 0.04em;
  transition: max-height 160ms ease, margin 160ms ease, opacity 160ms ease;
}
.cascade-node:hover .cascade-node__role,
.cascade-node:focus-visible .cascade-node__role {
  max-height: 2em;
  margin-top: 5px;
  opacity: 1;
}

.cascade-node__activity {
  position: absolute;
  top: 11px;
  right: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cascade-green);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.08);
}
.cascade-node[data-state="waiting"] .cascade-node__state,
.cascade-node[data-state="saturated"] .cascade-node__state,
.cascade-node[data-state="degraded"] .cascade-node__state,
.cascade-node[data-state="fallback"] .cascade-node__state,
.cascade-node[data-state="buffering"] .cascade-node__state { color: var(--cascade-accent); }
.cascade-node[data-state="failed"] .cascade-node__state { color: var(--cascade-red); }
.cascade-node[data-state="failed"] {
  border-color: rgba(226, 75, 74, 0.5);
  background: rgba(226, 75, 74, 0.035);
  box-shadow: none;
}
.cascade-node[data-state="failed"] .cascade-node__activity { background: var(--cascade-red); box-shadow: none; }
.cascade-node[data-state="waiting"] .cascade-node__activity,
.cascade-node[data-state="saturated"] .cascade-node__activity { background: var(--cascade-accent); }
.cascade-node[data-state="fallback"] {
  border-color: rgba(245, 166, 35, 0.62);
  box-shadow: inset 0 0 0 1px rgba(245, 166, 35, 0.12);
}
.cascade-node[data-state="buffering"] { border-color: rgba(245, 166, 35, 0.55); }
.cascade-node[data-state="buffering"] .cascade-node__activity { background: var(--cascade-accent); }
.cascade-node[data-state="degraded"] .cascade-node__activity,
.cascade-node[data-state="fallback"] .cascade-node__activity { background: var(--cascade-accent); }

.cascade-node--edge { --node-x: 9%; --node-y: 50%; }
.cascade-node--api { --node-x: 27%; --node-y: 50%; }
.cascade-node--core { --node-x: 50%; --node-y: 50%; }
.cascade-node--database { --node-x: 79%; --node-y: 50%; }
.cascade-node--cache { --node-x: 50%; --node-y: 20%; }
.cascade-node--queue { --node-x: 50%; --node-y: 76%; }
.cascade-node--worker { --node-x: 79%; --node-y: 76%; }

.cascade-node--faultable::after {
  border-color: var(--cascade-accent);
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.08);
}
.cascade-topology[data-phase="baseline"] .cascade-node--faultable {
  animation: cascade-hint 3.4s ease-in-out infinite;
}
@keyframes cascade-hint {
  0%, 65%, 100% { border-color: var(--cascade-border-hi); }
  78% { border-color: rgba(245, 166, 35, 0.55); }
}

.cascade-fault-menu {
  position: absolute;
  left: var(--menu-left, 50%);
  top: var(--menu-top, 50%);
  z-index: 8;
  width: min(230px, calc(100% - 24px));
  padding: 10px;
  border: 1px solid rgba(245, 166, 35, 0.42);
  border-radius: 6px;
  background: rgba(17, 17, 24, 0.98);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.42);
}
.cascade-fault-menu[hidden] { display: none; }
.cascade-menu-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 2px 2px 8px;
}
.cascade-menu__label { color: var(--cascade-text-dim); font-size: 0.62rem; }
.cascade-menu-close {
  min-width: 44px;
  min-height: 44px;
  border: 0;
  background: transparent;
  color: var(--cascade-text-dim);
  font: inherit;
  cursor: pointer;
}
.cascade-fault-actions { display: grid; gap: 6px; }
.cascade-fault-action {
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--cascade-border-hi);
  border-radius: 4px;
  background: var(--cascade-bg);
  color: var(--cascade-text);
  text-align: left;
  font: 500 0.72rem/1.2 "IBM Plex Mono", monospace;
  letter-spacing: 0.08em;
  cursor: pointer;
}
.cascade-fault-action:hover { border-color: var(--cascade-accent); color: var(--cascade-accent-hover); }

.cascade-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr)) auto auto;
  gap: 8px;
  align-items: stretch;
  padding: 12px 16px;
  border-top: 1px solid var(--cascade-border);
  border-bottom: 1px solid var(--cascade-border);
}
.cascade-toggle,
.cascade-action {
  min-height: 46px;
  border: 1px solid var(--cascade-border-hi);
  border-radius: 4px;
  background: rgba(17, 17, 24, 0.72);
  color: var(--cascade-text-dim);
  font: 500 0.68rem/1.25 "IBM Plex Mono", monospace;
  cursor: pointer;
}
.cascade-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 11px;
}
.cascade-toggle:hover,
.cascade-action:hover:not(:disabled) { border-color: rgba(245, 166, 35, 0.55); color: var(--cascade-text); }
.cascade-toggle[aria-pressed="true"] {
  border-color: rgba(245, 166, 35, 0.58);
  background: var(--cascade-accent-dim);
  color: var(--cascade-text);
}
.cascade-toggle [data-toggle-state] { color: var(--cascade-accent); }
.cascade-toggle[aria-pressed="false"] [data-toggle-state] { color: var(--cascade-text-faint); }
.cascade-action { padding: 8px 13px; }
.cascade-action:disabled { opacity: 0.36; cursor: not-allowed; }
.cascade-action--replay:not(:disabled) { color: var(--cascade-accent); }

.cascade-consequence {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.45fr);
  gap: 24px;
  padding: 16px;
}
.cascade-consequence h2 {
  margin: 0 0 5px;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.cascade-consequence p { margin: 0; color: var(--cascade-text-dim); }
.cascade-consequence #cascade-consequence { color: var(--cascade-text); margin-bottom: 4px; }
.cascade-readouts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  align-content: start;
}
.cascade-readout {
  min-width: 0;
  padding-left: 10px;
  border-left: 1px solid var(--cascade-border-hi);
}
.cascade-readout span { display: block; color: var(--cascade-text-faint); font-size: 0.58rem; }
.cascade-readout strong { display: block; overflow: hidden; color: var(--cascade-text); font-size: 0.76rem; text-overflow: ellipsis; white-space: nowrap; }
.cascade-previous { grid-column: 1 / -1; }
.cascade-previous[hidden] { display: none; }

.cascade-note {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 28px;
  margin-top: 22px;
  color: var(--cascade-text-dim);
}
.cascade-note strong { color: var(--cascade-text); font-weight: 500; }
.cascade-note p { margin: 0; }
.cascade-note code { color: var(--cascade-accent); font: inherit; }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 900px) {
  .cascade-hero { grid-template-columns: 1fr; align-items: start; }
  .cascade-evidence { max-width: 520px; }
  .cascade-controls { grid-template-columns: repeat(3, 1fr); }
  .cascade-action { grid-row: 2; }
  .cascade-action--replay { grid-column: 2; }
  .cascade-action--reset { grid-column: 3; }
  .cascade-node--edge { --node-x: 8%; }
  .cascade-node--api { --node-x: 27%; }
  .cascade-node--database,
  .cascade-node--worker { --node-x: 82%; }
}

@media (max-width: 680px) {
  .cascade-page main { width: min(calc(100% - 28px), 1100px); padding-top: 24px; }
  .cascade-hero h1 { font-size: clamp(2.55rem, 17vw, 4rem); }
  .cascade-instruction-row { grid-template-columns: 1fr; gap: 5px; padding: 10px 12px; }
  .cascade-root { white-space: normal; }
  .cascade-topology { min-height: 700px; }
  .cascade-node { width: min(154px, 43vw); min-height: 70px; }
  .cascade-node--edge { --node-x: 50%; --node-y: 8%; }
  .cascade-node--api { --node-x: 50%; --node-y: 22%; }
  .cascade-node--core { --node-x: 50%; --node-y: 38%; }
  .cascade-node--cache { --node-x: 24%; --node-y: 56%; }
  .cascade-node--database { --node-x: 76%; --node-y: 56%; }
  .cascade-node--queue { --node-x: 24%; --node-y: 76%; }
  .cascade-node--worker { --node-x: 76%; --node-y: 76%; }
  .cascade-fault-menu {
    position: fixed;
    left: 14px;
    right: 14px;
    top: auto;
    bottom: calc(72px + env(safe-area-inset-bottom, 0px));
    width: auto;
    max-width: none;
  }
  .cascade-controls { grid-template-columns: 1fr; padding: 12px; }
  .cascade-action,
  .cascade-action--replay,
  .cascade-action--reset { grid-column: auto; grid-row: auto; }
  .cascade-consequence { grid-template-columns: 1fr; padding: 14px 12px; }
  .cascade-note { grid-template-columns: 1fr; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .cascade-connection,
  .cascade-node,
  .cascade-node__role,
  .cascade-topology[data-phase="baseline"] .cascade-node--faultable {
    animation: none !important;
    transition-duration: 0.001ms !important;
  }
}

.cascade-topology[data-document-hidden="true"] .cascade-connection,
.cascade-topology[data-document-hidden="true"] .cascade-node--faultable {
  animation-play-state: paused !important;
}