/* =========================================================================
   CryptoSquawk Showcase — Dark "ArbTrader Labs" theme
   Clean-room styling, no external dependencies, no frameworks.
   ========================================================================= */

:root {
  --bg-0: #05080c;
  --bg-1: #0b1119;
  --bg-2: #111a26;
  --bg-3: #16212f;
  --border: #223145;
  --border-soft: #1b2836;
  --text-0: #e8eef5;
  --text-1: #aebccd;
  --text-2: #74879d;

  --cyan: #35e6c8;
  --violet: #a685ff;
  --amber: #ffb545;
  --red: #ff5d6c;
  --slate: #8fa2b8;
  --green: #4ade80;

  --accent: var(--cyan);
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-panel: 0 1px 0 rgba(255,255,255,0.02) inset, 0 8px 24px rgba(0,0,0,0.35);
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition-fast: 140ms ease;
  --transition-med: 320ms ease;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 15% -10%, #0d1a24 0%, var(--bg-0) 55%), var(--bg-0);
  color: var(--text-0);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.45;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #00131a;
  padding: 8px 14px;
  z-index: 999;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

h2 { font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-1); margin: 0; font-weight: 700; }
h3 { color: var(--text-0); }
a { color: var(--cyan); }

/* ---------------------------- Top bar ---------------------------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  flex-wrap: wrap;
}

.topbar__brand { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  font-size: 22px;
  color: var(--accent);
  filter: drop-shadow(0 0 6px rgba(53,230,200,0.55));
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-weight: 800; font-size: 17px; letter-spacing: 0.02em; }
.brand-sub { font-size: 11px; color: var(--text-2); letter-spacing: 0.04em; }

.topbar__status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-1);
}
.status-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  flex: none;
}
.status-dot[data-state="degraded"] { background: var(--amber); box-shadow: 0 0 8px var(--amber); }
.status-dot[data-state="down"] { background: var(--red); box-shadow: 0 0 8px var(--red); }
.reduce-motion .status-dot { box-shadow: none; }

.topbar__clock {
  padding: 3px 8px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: var(--bg-0);
  color: var(--text-0);
}

.topbar__controls { display: flex; align-items: center; gap: 10px; }

select, button {
  font-family: inherit;
  font-size: 13px;
}

.scenario-picker select {
  background: var(--bg-0);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  cursor: pointer;
}

.btn {
  background: var(--bg-3);
  color: var(--text-0);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  cursor: pointer;
  font-weight: 600;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.btn:hover { border-color: var(--accent); }
.btn--accent[aria-pressed="true"] {
  background: var(--accent);
  color: #00191a;
  border-color: var(--accent);
}

/* ---------------------------- Showcase progress bar ---------------------------- */
.showcase-bar {
  height: 3px;
  background: var(--bg-1);
  position: relative;
  overflow: hidden;
  display: none;
}
.showcase-bar.active { display: block; }
.showcase-bar__fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}
.reduce-motion .showcase-bar__fill { transition: none !important; }
.showcase-bar__label {
  position: absolute;
  right: 10px;
  top: -18px;
  font-size: 10px;
  color: var(--text-2);
  font-family: var(--font-mono);
}

/* ---------------------------- Disclaimer ---------------------------- */
.disclaimer {
  background: #1a1406;
  border-bottom: 1px solid #3a2c0c;
  color: #e8cf8c;
  font-size: 12px;
  padding: 7px 20px;
  text-align: center;
}

/* ---------------------------- Layout ---------------------------- */
.panel--full {
  max-width: 1560px;
  margin: 18px 20px 0;
}
@media (min-width: 1600px) {
  .panel--full { margin: 18px auto 0; }
}

.layout {
  display: grid;
  grid-template-columns: 1.05fr 1.25fr 1fr;
  gap: 16px;
  padding: 12px 20px 40px;
  align-items: start;
  max-width: 1600px;
  margin: 0 auto;
}

.col { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 1fr 1fr; }
  .col--right { grid-column: 1 / -1; flex-direction: row; flex-wrap: wrap; }
  .col--right .panel { flex: 1 1 260px; }
}
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .col--right { flex-direction: column; }
  .topbar { flex-direction: column; align-items: stretch; }
  .topbar__status { justify-content: space-between; }
}

/* ---------------------------- Panels ---------------------------- */
.panel {
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px 16px;
  box-shadow: var(--shadow-panel);
}
.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  gap: 8px;
  flex-wrap: wrap;
}
.panel-footnote {
  margin: 10px 2px 0;
  font-size: 11.5px;
  color: var(--text-2);
}

.scenario-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-1);
  background: var(--bg-0);
}
.pipeline-hint { font-size: 11px; color: var(--text-2); }

/* ---------------------------- Event stream ---------------------------- */
.event-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 260px;
  overflow-y: auto;
  display: flex;
  flex-direction: column-reverse;
  gap: 6px;
}
.event-list li {
  display: grid;
  grid-template-columns: 62px 54px 1fr;
  gap: 8px;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-0);
  border: 1px solid var(--border-soft);
  animation: rowIn 260ms ease both;
}
.reduce-motion .event-list li { animation: none; }
.event-list time { color: var(--text-2); }
.event-list .ev-symbol { color: var(--text-1); font-weight: 700; }
.event-list .ev-text { color: var(--text-0); white-space: normal; word-break: break-word; }
.event-list li[data-severity="warn"] { border-left: 3px solid var(--amber); }
.event-list li[data-severity="error"] { border-left: 3px solid var(--red); }
.event-list li[data-severity="info"] { border-left: 3px solid var(--border); }

@keyframes rowIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------------------------- Pipeline SVG ---------------------------- */
.pipeline-wrap { width: 100%; overflow-x: auto; }
#pipelineSvg { width: 100%; height: auto; min-width: 640px; }
.stage-box {
  fill: var(--bg-0);
  stroke: var(--border);
  stroke-width: 1.5;
  transition: stroke var(--transition-med), fill var(--transition-med);
}
.reduce-motion .stage-box { transition: none; }
.stage-box.active { stroke: var(--accent); fill: #0d2420; }
.stage-box.blocked { stroke: var(--red); fill: #2a1216; }
.stage-label { fill: var(--text-1); font-size: 11px; font-family: var(--font-sans); }
.stage-detail { fill: var(--text-2); font-size: 7.6px; font-family: var(--font-sans); }
.stage-arrow { stroke: var(--border); stroke-width: 1.5; marker-end: url(#arrowhead); }
.stage-arrow.active { stroke: var(--accent); }
.pipeline-pulse {
  fill: var(--accent);
  opacity: 0;
}
.pipeline-pulse.show { opacity: 1; }
.reduce-motion .pipeline-pulse { transition: none; }

/* ---------------------------- Funnel ---------------------------- */
.funnel { display: flex; flex-direction: column; gap: 8px; }
.funnel-row { display: grid; grid-template-columns: 108px 1fr 60px; align-items: center; gap: 8px; }
.funnel-row .fr-label { font-size: 11.5px; color: var(--text-1); }
.funnel-row .fr-value { font-family: var(--font-mono); font-size: 12px; text-align: right; color: var(--text-0); }
.funnel-track { background: var(--bg-0); border: 1px solid var(--border-soft); border-radius: 999px; height: 12px; overflow: hidden; }
.funnel-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  width: 0%;
  transition: width 600ms ease;
}
.reduce-motion .funnel-fill { transition: none; }

/* ---------------------------- Squawk output ---------------------------- */
.squawk-count { font-family: var(--font-mono); font-size: 11px; color: var(--text-2); }
.squawk-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 620px;
  overflow-y: auto;
}
.squawk-item {
  border: 1px solid var(--border);
  background: var(--bg-0);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  cursor: pointer;
  text-align: left;
  width: 100%;
  color: inherit;
  font: inherit;
  display: block;
  animation: rowIn 320ms ease both;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}
.reduce-motion .squawk-item { animation: none; transition: none; }
.squawk-item:hover { border-color: var(--accent); }
.squawk-item:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.squawk-item[data-suppressed="true"] {
  opacity: 0.62;
  border-style: dashed;
  border-color: var(--slate);
}
.squawk-item__top { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 4px; align-items: center; }
.squawk-item__symbol { font-family: var(--font-mono); font-weight: 700; color: var(--cyan); font-size: 12px; }
.squawk-item[data-suppressed="true"] .squawk-item__symbol { color: var(--slate); }
.squawk-item__conf { font-family: var(--font-mono); font-size: 11px; color: var(--text-2); }
.squawk-item__text { font-size: 13.5px; color: var(--text-0); }
.squawk-item[data-suppressed="true"] .squawk-item__text { color: var(--text-1); font-style: italic; }
.squawk-item__badge {
  display: inline-block;
  font-size: 10px;
  padding: 1px 7px;
  border-radius: 999px;
  background: var(--bg-3);
  color: var(--text-2);
  border: 1px solid var(--border-soft);
  margin-left: 6px;
}
.squawk-item[data-suppressed="true"] .squawk-item__badge {
  background: #241a12;
  color: var(--amber);
  border-color: #4a3418;
}
.squawk-item__meta { margin-top: 6px; font-family: var(--font-mono); font-size: 10.5px; color: var(--text-2); }

/* ---------------------------- Metric grid (system health) ---------------------------- */
.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0;
}
.metric-grid div.metric {
  background: var(--bg-0);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}
.metric dt, .metric-grid dt { font-size: 10.5px; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.04em; }
.metric dd, .metric-grid dd { margin: 2px 0 0; font-family: var(--font-mono); font-size: 15px; color: var(--text-0); }
.metric-grid dd.status-healthy { color: var(--green); }
.metric-grid dd.status-degraded { color: var(--amber); }
.metric-grid dd.status-down { color: var(--red); }

/* ---------------------------- Shadow health ---------------------------- */
.shadow-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.shadow-engine {
  background: var(--bg-0);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 10px;
}
.shadow-engine h4 { margin: 0 0 6px; font-size: 11px; color: var(--text-1); text-transform: uppercase; letter-spacing: 0.04em; }
.shadow-engine .eng-status { font-family: var(--font-mono); font-size: 13px; font-weight: 700; }
.shadow-engine .eng-status.healthy { color: var(--green); }
.shadow-engine .eng-status.degraded { color: var(--red); }
.shadow-parity {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-1);
  display: flex;
  justify-content: space-between;
  border-top: 1px dashed var(--border-soft);
  padding-top: 8px;
  margin-top: 2px;
}

/* ---------------------------- Observability ---------------------------- */
.obs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}
.obs-cell {
  background: var(--bg-0);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 7px 8px;
  text-align: center;
}
.obs-cell .obs-val { font-family: var(--font-mono); font-size: 15px; color: var(--text-0); }
.obs-cell .obs-key { font-size: 9.5px; color: var(--text-2); text-transform: uppercase; }
.log-lines {
  list-style: none;
  margin: 0;
  padding: 8px;
  background: #05080c;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: #7fd9c4;
  max-height: 110px;
  overflow-y: auto;
}
.log-lines li::before { content: "$ "; color: var(--text-2); }
.log-lines li { padding: 2px 0; white-space: pre-wrap; word-break: break-word; }

/* ---------------------------- Latency ---------------------------- */
.latency-bars { display: flex; align-items: flex-end; gap: 10px; height: 90px; padding-top: 4px; }
.latency-bar-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; height: 100%; justify-content: flex-end; }
.latency-bar-col .bar {
  width: 100%;
  max-width: 46px;
  background: linear-gradient(180deg, var(--cyan), #146a5c);
  border-radius: 4px 4px 0 0;
  transition: height 500ms ease;
}
.reduce-motion .latency-bar-col .bar { transition: none; }
.latency-bar-col:nth-child(2) .bar { background: linear-gradient(180deg, var(--amber), #6a4a14); }
.latency-bar-col:nth-child(3) .bar { background: linear-gradient(180deg, var(--red), #6a1420); }
.latency-bar-col .lb-label { font-size: 10px; color: var(--text-2); font-family: var(--font-mono); }
.latency-bar-col .lb-value { font-size: 11px; color: var(--text-0); font-family: var(--font-mono); }

/* ---------------------------- Cost ---------------------------- */
.cost-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.cost-cell {
  background: var(--bg-0);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 7px 9px;
}
.cost-cell .cc-key { font-size: 9.5px; color: var(--text-2); text-transform: uppercase; }
.cost-cell .cc-val { font-family: var(--font-mono); font-size: 14px; color: var(--text-0); }
.cost-sparkline { width: 100%; height: 46px; }
.cost-sparkline path { fill: none; stroke: var(--violet); stroke-width: 2; }
.cost-sparkline circle { fill: var(--violet); }

/* ---------------------------- Modal (squawk trace) ---------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(2,5,8,0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 560px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 22px 24px 24px;
  position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  animation: modalIn 220ms ease;
}
.reduce-motion .modal { animation: none; }
@keyframes modalIn { from { opacity: 0; transform: translateY(8px) scale(0.98); } to { opacity: 1; transform: none; } }
.modal__close {
  position: absolute;
  top: 12px; right: 12px;
  background: transparent;
  border: none;
  color: var(--text-1);
  font-size: 16px;
  cursor: pointer;
  padding: 6px;
}
.modal__close:hover { color: var(--text-0); }
.modal__symbol { font-family: var(--font-mono); color: var(--cyan); margin: 2px 0 10px; font-size: 12px; }
.modal__text {
  margin: 0 0 14px;
  padding: 10px 12px;
  border-left: 3px solid var(--accent);
  background: var(--bg-0);
  color: var(--text-0);
  font-style: italic;
}
.modal__meta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-2);
  margin-bottom: 14px;
}
.modal__meta span b { color: var(--text-0); }
.trace-steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.trace-steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 24px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 12.5px;
}
.trace-steps li:last-child { border-bottom: none; }
.trace-steps li::before {
  content: counter(step);
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 1px solid var(--border);
  color: var(--text-1);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 10px;
}
.trace-steps li[data-blocked="true"]::before { border-color: var(--red); color: var(--red); }
.trace-steps li .ts-label { color: var(--text-0); font-weight: 600; }
.trace-steps li .ts-detail { color: var(--text-2); font-size: 11px; grid-column: 2 / 3; }
.trace-steps li .ts-ms { font-family: var(--font-mono); color: var(--text-1); }
.trace-steps li[data-blocked="true"] .ts-label { color: var(--red); }

/* ---------------------------- Footer ---------------------------- */
.site-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-2);
  font-size: 11.5px;
  border-top: 1px solid var(--border-soft);
}
.site-footer a { color: var(--text-1); }

/* ---------------------------- Scenario accent theming ---------------------------- */
body[data-accent="cyan"]   { --accent: var(--cyan); }
body[data-accent="violet"] { --accent: var(--violet); }
body[data-accent="amber"]  { --accent: var(--amber); }
body[data-accent="red"]    { --accent: var(--red); }
body[data-accent="slate"]  { --accent: var(--slate); }

/* ---------------------------- Scrollbars ---------------------------- */
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ---------------------------- Reduced motion (global safety net) ---------------------------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}