/* Mandelbrot lab — interactive complex-plane viewer with Julia inset. */

.mb-stage {
  margin: 0 0 2rem;
}

.mb-board {
  position: relative;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--rule);
  background: var(--bg);
  overflow: hidden;
  user-select: none;
  touch-action: none;
}

#mb-main {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
  image-rendering: auto;
}
#mb-main.mb-dragging {
  cursor: grabbing;
}

.mb-inset {
  position: absolute;
  bottom: 0.6rem;
  right: 0.6rem;
  width: 180px;
  height: 180px;
  border: 1px solid var(--rule);
  background: var(--bg);
  pointer-events: none;
  /* low-res internal buffer scaled up — keep it crisp-ish */
  image-rendering: auto;
  transition: opacity 0.2s;
  opacity: 1;
}
.mb-inset.mb-hidden {
  opacity: 0;
}

.mb-readout {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  pointer-events: none;
  font-feature-settings: "tnum" 1;
  letter-spacing: 0.02em;
}
.mb-readout-row {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
}
.mb-readout-key {
  color: var(--muted);
  opacity: 0.7;
}
.mb-readout span:not(.mb-readout-key):not(.mb-readout-row) {
  color: var(--ink-soft);
}

@media (max-width: 520px) {
  .mb-inset {
    width: 120px;
    height: 120px;
  }
}

/* controls */

.mb-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.mb-controls .ctrl-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.mb-controls .ctrl-row.sliders {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}
.mb-controls .row-control {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.mb-controls .row-control .label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: lowercase;
  letter-spacing: 0.04em;
}
.mb-controls .row-control .value {
  color: var(--ink-soft);
  font-feature-settings: "tnum" 1;
  text-transform: none;
}

/* slider styling — match the collisions lab */
.mb-controls input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 14px;
  background: transparent;
  cursor: pointer;
  margin: 0;
}
.mb-controls input[type="range"]::-webkit-slider-runnable-track {
  height: 1px;
  background: var(--rule);
}
.mb-controls input[type="range"]::-moz-range-track {
  height: 1px;
  background: var(--rule);
}
.mb-controls input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-warm);
  margin-top: -6px;
  border: none;
  transition: transform 0.15s ease;
}
.mb-controls input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-warm);
  border: none;
}
.mb-controls input[type="range"]:hover::-webkit-slider-thumb {
  transform: scale(1.25);
}

/* radio row for palette */
.mb-radio-row {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.mb-radio {
  position: relative;
  cursor: pointer;
}
.mb-radio input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.mb-radio span {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.74rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  text-transform: lowercase;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.mb-radio:hover span {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}
.mb-radio input:checked + span {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
  background: color-mix(in srgb, var(--accent-warm) 10%, transparent);
}
.mb-radio input:focus-visible + span {
  outline: 2px solid var(--accent-warm);
  outline-offset: 2px;
}

/* toggle */
.mb-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--ink-soft);
  text-transform: lowercase;
  letter-spacing: 0.04em;
}
.mb-toggle input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.mb-toggle-track {
  position: relative;
  display: inline-block;
  width: 30px;
  height: 16px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  transition: border-color 0.2s, background 0.2s;
}
.mb-toggle-thumb {
  position: absolute;
  top: 1px;
  left: 1px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform 0.2s ease, background 0.2s;
}
.mb-toggle input:checked + .mb-toggle-track {
  border-color: var(--accent-warm);
  background: color-mix(in srgb, var(--accent-warm) 18%, transparent);
}
.mb-toggle input:checked + .mb-toggle-track .mb-toggle-thumb {
  transform: translateX(14px);
  background: var(--accent-warm);
}

/* buttons */
.mb-controls button {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.4rem 0.95rem;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--ink-soft);
  border-radius: 999px;
  cursor: pointer;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.mb-controls button:hover {
  color: var(--accent-warm);
  border-color: var(--accent-warm);
}

/* notes — same treatment as other labs */
.notes em {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.85em;
  padding: 0.05em 0.4em;
  border: 1px solid var(--rule);
  border-radius: 4px;
  color: var(--ink);
  margin: 0 0.1em;
}