:root {
  --mandel-bg: #f4f5f2;
  --mandel-ink: #141820;
  --mandel-muted: #5b6472;
  --mandel-line: rgba(20, 24, 32, 0.12);
  --mandel-panel: rgba(255, 255, 255, 0.86);
  --mandel-hot: #e24d2f;
  --mandel-active: #c9361f;
  --mandel-cool: #159a9c;
  --mandel-shadow: rgba(18, 24, 38, 0.14);
  --mandel-radius: 10px;
}

.theme-dark {
  --mandel-bg: #07090d;
  --mandel-ink: #f2f6ff;
  --mandel-muted: #8f98a8;
  --mandel-line: rgba(242, 246, 255, 0.08);
  --mandel-panel: rgba(10, 12, 16, 0.8);
  --mandel-hot: #ff6b4a;
  --mandel-active: #43d8c9;
  --mandel-cool: #43d8c9;
  --mandel-shadow: rgba(0, 0, 0, 0.36);
}

.mandelbrot-root {
  display: grid;
  gap: 1rem;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.75rem;
  color: var(--mandel-ink);
  background:
    radial-gradient(circle at 8% 0%, color-mix(in srgb, var(--mandel-hot) 16%, transparent), transparent 34%),
    radial-gradient(circle at 92% 100%, color-mix(in srgb, var(--mandel-cool) 14%, transparent), transparent 36%),
    var(--mandel-bg);
  border: 1px solid var(--mandel-line);
  border-radius: var(--mandel-radius);
}

.mandelbrot-stage {
  position: relative;
  min-height: 380px;
  overflow: hidden;
  background: #07080b;
  border: 1px solid color-mix(in srgb, var(--mandel-cool) 24%, var(--mandel-line));
  border-radius: calc(var(--mandel-radius) - 2px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 24px 70px var(--mandel-shadow),
    0 0 70px color-mix(in srgb, var(--mandel-hot) 18%, transparent);
}

.mandelbrot-canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 380px;
  cursor: crosshair;
}

.mandelbrot-reticle {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.mandelbrot-reticle::before,
.mandelbrot-reticle::after {
  position: absolute;
  content: "";
  background: rgba(255, 255, 255, 0.5);
}

.mandelbrot-reticle::before {
  left: 50%;
  top: -18px;
  width: 1px;
  height: 108px;
}

.mandelbrot-reticle::after {
  left: -18px;
  top: 50%;
  width: 108px;
  height: 1px;
}

.mandelbrot-coordinate-strip {
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  justify-content: space-between;
  padding: 0.75rem;
  color: #f8fafc;
  background: rgba(7, 8, 11, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: calc(var(--mandel-radius) - 2px);
  backdrop-filter: blur(14px);
}

.mandelbrot-coordinate-strip span,
.mandelbrot-readouts span,
.mandelbrot-control span {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mandel-muted);
}

.mandelbrot-coordinate-strip span {
  color: rgba(255, 255, 255, 0.72);
}

.mandelbrot-coordinate-strip strong {
  font-size: 0.9rem;
  font-weight: 450;
  color: #fff;
  overflow-wrap: anywhere;
}

.mandelbrot-panel {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1.25rem;
  background: var(--mandel-panel);
  border: 1px solid var(--mandel-line);
  border-radius: calc(var(--mandel-radius) - 2px);
  backdrop-filter: blur(12px);
}

.mandelbrot-presets {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--mandel-line);
  border-radius: calc(var(--mandel-radius) - 2px);
}

.mandelbrot-preset {
  min-height: 42px;
  padding: 0.7rem 0.85rem;
  color: var(--mandel-ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--mandel-line);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.mandelbrot-preset:last-child {
  border-bottom: 0;
}

.mandelbrot-preset.active,
.mandelbrot-preset:hover {
  color: var(--mandel-ink);
  background: color-mix(in srgb, var(--mandel-active) 11%, transparent);
  box-shadow: inset 0 -2px 0 var(--mandel-active);
}

.theme-dark .mandelbrot-preset.active,
.theme-dark .mandelbrot-preset:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 -2px 0 var(--mandel-active);
}

.mandelbrot-reset-button {
  align-self: flex-start;
  min-height: 30px;
  padding: 0;
  color: var(--mandel-muted);
  background: transparent;
  border: 0;
  border-bottom: 1px solid transparent;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
}

.mandelbrot-reset-button:hover {
  color: var(--mandel-ink);
  border-bottom-color: var(--mandel-active);
}

.mandelbrot-readouts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.15rem;
}

.mandelbrot-readout {
  display: grid;
  gap: 0.3rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--mandel-line);
}

.mandelbrot-readouts strong {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: 0;
  color: var(--mandel-ink);
  overflow-wrap: anywhere;
}

.mandelbrot-readout-hero strong {
  font-size: clamp(2rem, 9vw, 2.65rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  color: var(--mandel-ink);
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.theme-dark .mandelbrot-readout-hero strong {
  color: #fff;
}

.mandelbrot-controls {
  display: grid;
  gap: 1.1rem;
}

.mandelbrot-control {
  display: grid;
  gap: 0.4rem;
}

.mandelbrot-control input,
.mandelbrot-control select {
  width: 100%;
  min-height: 42px;
}

.mandelbrot-control input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  min-height: 28px;
  background: transparent;
  cursor: pointer;
}

.mandelbrot-control input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--mandel-line);
  border-radius: 999px;
}

.mandelbrot-control input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--mandel-line);
  border-radius: 999px;
}

.mandelbrot-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 8px;
  height: 8px;
  margin-top: -3px;
  background: var(--mandel-ink);
  border: 0;
  border-radius: 50%;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--mandel-ink) 10%, transparent);
}

.mandelbrot-control input[type="range"]::-moz-range-thumb {
  width: 8px;
  height: 8px;
  background: var(--mandel-ink);
  border: 0;
  border-radius: 50%;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--mandel-ink) 10%, transparent);
}

.theme-dark .mandelbrot-control input[type="range"]::-webkit-slider-thumb {
  background: #fff;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.45);
}

.theme-dark .mandelbrot-control input[type="range"]::-moz-range-thumb {
  background: #fff;
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.45);
}

.mandelbrot-control select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  padding: 0 1.85rem 0 0;
  color: var(--mandel-ink);
  background-color: transparent;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23141820' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'><path d='m6 9 6 6 6-6'/></svg>");
  background-position: right 0.05rem center;
  background-repeat: no-repeat;
  border: 0;
  border-bottom: 1px solid var(--mandel-line);
  border-radius: 0;
  font-size: 0.95rem;
}

.theme-dark .mandelbrot-control select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'><path d='m6 9 6 6 6-6'/></svg>");
}

.mandelbrot-control select option {
  color: #141820;
  background: #fff;
}

.theme-dark .mandelbrot-control select option {
  color: #f2f6ff;
  background: #111722;
}

@media (min-width: 760px) {
  .mandelbrot-root {
    grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.45fr);
    padding: 1rem;
  }

  .mandelbrot-stage,
  .mandelbrot-canvas {
    min-height: 640px;
  }

  .mandelbrot-presets {
    grid-template-columns: repeat(3, 1fr);
  }

  .mandelbrot-preset {
    border-right: 1px solid var(--mandel-line);
    border-bottom: 0;
  }

  .mandelbrot-preset:last-child {
    border-right: 0;
  }
}