/* ===== JEVGPU design tokens =====
   ritual reference: cestus.network (dark charcoal SaaS dashboard, thin glowing
   cyan circuit-trace lines, clean sans labels, generous negative space).
   palette:  charcoal bg #1A1E24 / cyan glow #4DE8C4 / white text
   type:     Fira Sans (labels/UI) + Fira Code (mono readouts, numbers, node id)
   spacing:  8 / 16 / 24 / 32 / 48 / 64 px scale
   radius:   16px panels, 10px controls, 6px chips
   motion:   one idiom - cyan glow-pulse + eased line-climb on the graph
*/
:root{
  --bg:#1A1E24;
  --panel:#20242C;
  --panel-2:#252A33;
  --border:rgba(77,232,196,0.20);
  --border-strong:rgba(77,232,196,0.45);
  --cyan:#4DE8C4;
  --cyan-soft:rgba(77,232,196,0.55);
  --white:#F3F6F8;
  --muted:#8B94A2;
  --badge-bg:#2E9E82;
  --danger:#FF6B6B;

  --r-lg:16px;
  --r-md:10px;
  --r-sm:6px;

  --sp-1:8px;
  --sp-2:16px;
  --sp-3:24px;
  --sp-4:32px;
  --sp-5:48px;
  --sp-6:64px;

  --font-sans:'Fira Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:'Fira Code', 'SF Mono', Menlo, monospace;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }

body{
  background:var(--bg);
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
  color:var(--white);
  font-family:var(--font-sans);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  -webkit-font-smoothing:antialiased;
}

a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; cursor:pointer; }

.trace-bg{
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:0.5;
}

/* ---------- topbar ---------- */
.topbar{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: var(--sp-2) var(--sp-4);
  border-bottom:1px solid var(--border);
}
.brand{
  display:flex;
  align-items:center;
  gap:var(--sp-2);
}
.brand-mark{
  width:30px;
  height:30px;
  display:block;
  filter: drop-shadow(0 0 6px var(--cyan-soft));
}
.brand-name{
  font-weight:700;
  font-size:15px;
  letter-spacing:0.04em;
}
.ticker-chip{
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--cyan);
  border:1px solid var(--border-strong);
  border-radius:var(--r-sm);
  padding:3px 8px;
}
.topbar-right{
  display:flex;
  align-items:center;
  gap:var(--sp-2);
}
.icon-btn{
  width:34px;
  height:34px;
  border-radius:var(--r-sm);
  border:1px solid var(--border);
  background:var(--panel);
  display:flex;
  align-items:center;
  justify-content:center;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 150ms ease;
}
.icon-btn:hover, .icon-btn:focus-visible{
  border-color:var(--border-strong);
  box-shadow:0 0 12px var(--cyan-soft);
  transform:translateY(-1px);
}
.icon-x{ width:16px; height:16px; }
.icon-x path{ stroke:var(--cyan); }
.icon-x circle{ fill:var(--cyan); }

.btn-buy{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.03em;
  color:#0C1512;
  background:var(--cyan);
  border:1px solid var(--cyan);
  border-radius:var(--r-sm);
  padding:9px 16px;
  transition: box-shadow 180ms ease, transform 150ms ease, filter 150ms ease;
}
.btn-buy:hover, .btn-buy:focus-visible{
  box-shadow:0 0 18px var(--cyan-soft);
  transform:translateY(-1px);
  filter:brightness(1.08);
}

/* ---------- main dashboard ---------- */
main.dashboard{
  position:relative;
  z-index:1;
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  padding: var(--sp-3) var(--sp-4) var(--sp-4);
}

.rack{
  width:100%;
  max-width:1180px;
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  background:linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  box-shadow: 0 0 0 1px rgba(0,0,0,0.2), 0 24px 60px rgba(0,0,0,0.45);
  display:grid;
  grid-template-columns: 1.05fr 1.3fr;
  overflow:hidden;
}

.rack-copy{
  padding: var(--sp-5) var(--sp-4);
  display:flex;
  flex-direction:column;
  gap:var(--sp-3);
  justify-content:center;
  border-right:1px solid var(--border);
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  align-self:flex-start;
  background:var(--badge-bg);
  color:#06120E;
  font-weight:700;
  font-size:13px;
  letter-spacing:0.01em;
  padding:8px 14px;
  border-radius:999px;
}

h1{
  margin:0;
  font-size:clamp(28px, 3.4vw, 40px);
  line-height:1.08;
  letter-spacing:-0.01em;
}
h1 span{ color:var(--cyan); }

.dek{
  margin:0;
  color:var(--muted);
  font-size:15px;
  line-height:1.55;
  max-width:46ch;
}

.node-row{
  display:flex;
  align-items:center;
  gap:var(--sp-2);
  margin-top:var(--sp-1);
}

.node-id{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
  border:1px solid var(--border);
  border-radius:var(--r-sm);
  padding:8px 12px;
  background:rgba(0,0,0,0.18);
  display:flex;
  align-items:center;
  gap:8px;
}
.node-id .label{ color:var(--muted); }
.node-id .value{
  color:var(--cyan);
  letter-spacing:0.01em;
}
.node-id button{
  border:none;
  background:none;
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:11px;
  padding:2px 6px;
  border-radius:4px;
  transition: color 150ms ease, background 150ms ease;
}
.node-id button:hover, .node-id button:focus-visible{
  color:var(--cyan);
  background:rgba(77,232,196,0.12);
}
.node-id.copied .value{ color:var(--white); }

/* ---------- graph side ---------- */
.rack-graph{
  padding: var(--sp-4);
  display:flex;
  flex-direction:column;
  gap:var(--sp-2);
}

.graph-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
}
.graph-title{
  font-size:11px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
}
.util-readout{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--cyan);
  border:1px solid var(--border);
  border-radius:var(--r-sm);
  padding:6px 10px;
  background:rgba(0,0,0,0.18);
}
.util-readout .num{
  font-weight:700;
  transition:none;
}
.util-readout.tick .num{
  animation: tickFlash 420ms ease-out;
}
@keyframes tickFlash{
  0%{ text-shadow:0 0 0px transparent; transform:scale(1); }
  30%{ text-shadow:0 0 10px var(--cyan-soft); transform:scale(1.12); }
  100%{ text-shadow:0 0 0px transparent; transform:scale(1); }
}

.chart-frame{
  border:1px solid var(--border);
  border-radius:var(--r-md);
  background:rgba(0,0,0,0.22);
  padding:var(--sp-2);
  flex:1;
  min-height:180px;
  display:flex;
}
.chart-frame svg{ width:100%; height:100%; display:block; }

.chart-axis{ stroke:var(--border-strong); stroke-width:1.5; }
.chart-marker-line{ stroke:var(--muted); stroke-width:1; stroke-dasharray:3 4; opacity:0.6; }
.chart-marker-label{
  fill:var(--muted);
  font-family:var(--font-mono);
  font-size:8px;
  letter-spacing:0.06em;
}
.chart-line{
  fill:none;
  stroke:var(--cyan);
  stroke-width:2.5;
  stroke-linecap:round;
  stroke-linejoin:round;
  filter: drop-shadow(0 0 6px var(--cyan-soft));
}
.chart-dot{
  fill:var(--cyan);
  filter: drop-shadow(0 0 8px var(--cyan-soft));
}

.graph-actions{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-2);
}
.btn-sim{
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:0.03em;
  color:var(--white);
  background:var(--panel-2);
  border:1px solid var(--border-strong);
  border-radius:var(--r-sm);
  padding:11px 18px;
  transition: box-shadow 180ms ease, transform 150ms ease, background 150ms ease;
}
.btn-sim:hover, .btn-sim:focus-visible{
  box-shadow:0 0 16px var(--cyan-soft);
  background:rgba(77,232,196,0.10);
  transform:translateY(-1px);
}
.btn-sim:active{ transform:translateY(0); }

.sim-hint{
  font-size:11px;
  color:var(--muted);
}

/* ---------- footer / status ---------- */
footer.statusbar{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-top:1px solid var(--border);
  font-family:var(--font-mono);
  font-size:11px;
  color:var(--muted);
}
.status-left{ display:flex; align-items:center; gap:var(--sp-3); flex-wrap:wrap; }
.status-dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px var(--cyan-soft);
  display:inline-block;
  margin-right:6px;
  animation: pulseDot 2.4s ease-in-out infinite;
}
@keyframes pulseDot{
  0%,100%{ opacity:1; }
  50%{ opacity:0.35; }
}
.session-clock .val{ color:var(--white); }

/* ---------- error banner ---------- */
#jev-error-banner{ display:none; }

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  .status-dot{ animation:none; }
  .util-readout.tick .num{ animation:none; }
  .icon-btn, .btn-buy, .btn-sim{ transition:none; }
}

/* ---------- responsive ---------- */
@media (max-width: 920px){
  .rack{ grid-template-columns: 1fr; }
  .rack-copy{ border-right:none; border-bottom:1px solid var(--border); }
  main.dashboard{ align-items:flex-start; padding: var(--sp-2) var(--sp-2) var(--sp-3); }
}

@media (max-width: 480px){
  .topbar{ padding: var(--sp-2) var(--sp-2); }
  .brand-name{ font-size:13px; }
  .ticker-chip{ display:none; }
  .rack-copy, .rack-graph{ padding: var(--sp-3) var(--sp-2); }
  h1{ font-size:26px; }
  .dek{ font-size:14px; }
  .chart-frame{ min-height:150px; }
  footer.statusbar{ flex-direction:column; align-items:flex-start; gap:6px; }
}