.daybook-demo {
  --demo-ink: var(--color-text, #28242c);
  --demo-muted: var(--color-muted, #756d7d);
  --demo-line: color-mix(in srgb, var(--demo-ink) 14%, transparent);
  --demo-accent: var(--color-accent, #6750a4);
  --demo-blue: #3e83f8;
  --demo-red: #d85d67;
  background: color-mix(in srgb, var(--color-paper, #fffdf8) 92%, var(--demo-accent) 8%);
  border: 1px solid var(--demo-line);
  border-radius: 18px;
  color: var(--demo-ink);
  margin: 1.4rem 0;
  overflow: hidden;
  padding: clamp(.85rem, 2.2vw, 1.25rem);
}

.daybook-demo__header,
.daybook-demo__readout {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
}

.daybook-demo__eyebrow,
.daybook-demo__title,
.daybook-demo__hint {
  margin: 0;
}

.daybook-demo__eyebrow {
  color: var(--demo-accent);
  font: 600 .68rem/1.2 var(--font-mono, ui-monospace, monospace);
  letter-spacing: .14em;
  text-transform: uppercase;
}

.daybook-demo__title {
  font: 600 1rem/1.45 var(--font-ui, system-ui, sans-serif);
  margin-top: .25rem;
}

.daybook-demo__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  justify-content: flex-end;
}

.daybook-demo__actions button {
  background: transparent;
  border: 1px solid var(--demo-line);
  border-radius: 999px;
  color: var(--demo-ink);
  cursor: pointer;
  font: 500 .78rem/1.2 var(--font-ui, system-ui, sans-serif);
  padding: .45rem .7rem;
}

.daybook-demo__actions button:hover,
.daybook-demo__actions button:focus-visible {
  border-color: var(--demo-accent);
  color: var(--demo-accent);
}

.daybook-demo__canvas-wrap {
  background: color-mix(in srgb, var(--color-paper, #fffdf8) 78%, #111 22%);
  border-radius: 13px;
  margin-top: 1rem;
  min-height: 240px;
  overflow: hidden;
}

.daybook-demo__canvas {
  cursor: grab;
  display: block;
  height: clamp(240px, 48vw, 360px);
  touch-action: none;
  width: 100%;
}

.daybook-demo__canvas:active {
  cursor: grabbing;
}

.daybook-demo__grid {
  stroke: rgba(255, 255, 255, .11);
  stroke-width: 1;
}

.daybook-demo__axis {
  stroke: rgba(255, 255, 255, .65);
  stroke-width: 1.5;
}

.daybook-demo__segment {
  stroke: var(--demo-blue);
  stroke-linecap: round;
  stroke-width: 3;
}

.daybook-demo__segment--crossing {
  stroke: var(--demo-red);
  stroke-dasharray: 7 5;
}

.daybook-demo__point {
  cursor: move;
  stroke: var(--color-paper, #fffdf8);
  stroke-width: 2.5;
}

.daybook-demo__point--primary {
  fill: var(--demo-blue);
}

.daybook-demo__point--midpoint {
  fill: var(--demo-accent);
}

.daybook-demo__point--crossing {
  fill: var(--demo-red);
}

.daybook-demo__point--intersection {
  fill: #f5b33b;
}

.daybook-demo__label {
  fill: #fff;
  font: 600 14px/1.2 var(--font-ui, system-ui, sans-serif);
  paint-order: stroke;
  stroke: rgba(0, 0, 0, .42);
  stroke-width: 3px;
}

.daybook-demo__label--midpoint {
  fill: #decaff;
}

.daybook-demo__label--crossing {
  fill: #ffd0d4;
}

.daybook-demo__readout {
  flex-wrap: wrap;
  font: .82rem/1.5 var(--font-mono, ui-monospace, monospace);
  margin-top: .8rem;
}

.daybook-demo__readout [data-demo-status] {
  color: var(--demo-muted);
}

.daybook-demo__readout [data-demo-status].is-warning {
  color: var(--demo-red);
  font-weight: 600;
}

.daybook-demo__hint {
  color: var(--demo-muted);
  font-size: .76rem;
  line-height: 1.55;
  margin-top: .55rem;
}

.daybook-demo__controls {
  display: grid;
  gap: .75rem 1.25rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1rem;
}

.daybook-demo__controls label {
  color: var(--demo-muted);
  display: grid;
  gap: .35rem;
  font-size: .78rem;
}

.daybook-demo__controls label span {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
}

.daybook-demo__controls b {
  color: var(--demo-ink);
  font-family: var(--font-mono, ui-monospace, monospace);
  font-weight: 600;
}

.daybook-demo__controls input[type="range"] {
  accent-color: var(--demo-accent);
  min-width: 0;
  width: 100%;
}

.daybook-demo--bjt .daybook-demo__canvas-wrap {
  background: color-mix(in srgb, var(--color-paper, #fffdf8) 90%, var(--demo-accent) 10%);
}

.daybook-demo__bjt-canvas {
  height: clamp(320px, 60vw, 400px);
}

.daybook-demo__wire,
.daybook-demo__bjt-terminal {
  stroke: var(--demo-ink);
  stroke-linecap: round;
  stroke-width: 2.2;
}

.daybook-demo__supply,
.daybook-demo__ground {
  stroke: var(--demo-ink);
  stroke-width: 2;
}

.daybook-demo__bjt-resistor,
.daybook-demo__bjt-cap {
  fill: color-mix(in srgb, var(--color-paper, #fffdf8) 78%, var(--demo-accent) 22%);
  stroke: var(--demo-ink);
  stroke-width: 2;
}

.daybook-demo__bjt-transistor {
  fill: color-mix(in srgb, var(--color-paper, #fffdf8) 82%, var(--demo-accent) 18%);
  stroke: var(--demo-accent);
  stroke-width: 2.5;
}

.daybook-demo__bjt-plot {
  fill: color-mix(in srgb, var(--color-paper, #fffdf8) 86%, var(--demo-accent) 14%);
  stroke: var(--demo-line);
  stroke-width: 1;
}

.daybook-demo__bjt-qline {
  stroke: var(--demo-muted);
  stroke-dasharray: 5 5;
  stroke-width: 1.2;
}

.daybook-demo__bjt-axis {
  stroke: var(--demo-muted);
  stroke-width: 1.2;
}

.daybook-demo__bjt-input-wave,
.daybook-demo__bjt-output-wave {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.5;
}

.daybook-demo__bjt-input-wave { stroke: var(--demo-blue); opacity: .78; }
.daybook-demo__bjt-output-wave { stroke: var(--demo-accent); }

.daybook-demo__bjt-heading,
.daybook-demo__bjt-label,
.daybook-demo__bjt-value,
.daybook-demo__bjt-axis-label,
.daybook-demo__bjt-legend-input,
.daybook-demo__bjt-legend-output {
  fill: var(--demo-ink);
  font-family: var(--font-ui, system-ui, sans-serif);
}

.daybook-demo__bjt-heading { font-size: 14px; font-weight: 600; }
.daybook-demo__bjt-label,
.daybook-demo__bjt-value,
.daybook-demo__bjt-axis-label { font-size: 12px; }
.daybook-demo__bjt-value { fill: var(--demo-accent); font-family: var(--font-mono, ui-monospace, monospace); }
.daybook-demo__bjt-axis-label { fill: var(--demo-muted); }
.daybook-demo__bjt-legend-input { fill: var(--demo-blue); font-size: 12px; }
.daybook-demo__bjt-legend-output { fill: var(--demo-accent); font-size: 12px; }

@media (max-width: 620px) {
  .daybook-demo__controls { grid-template-columns: 1fr; }
}

.daybook-demo--fallback {
  color: var(--demo-muted);
  font: .86rem/1.5 var(--font-mono, ui-monospace, monospace);
  padding: .8rem;
}

@media (max-width: 620px) {
  .daybook-demo__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .daybook-demo__actions {
    justify-content: flex-start;
  }
}