#omg-header {
  z-index: 450;
}

/* core.css is shared across other projects, so the theme-picker's swatch
   styling stays untouched there -- this overrides it to render icons
   (sun/moon/spiral, same set as react-morph-charts' ThemeToggle) instead of
   plain colored circles, without needing to edit the shared file. */
#omg-theme-picker {
  gap: 2px;
}
#omg-theme-picker > a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  width: 28px;
  border-radius: 50%;
  border: 1px solid transparent;
  background: none;
  color: currentColor;
  opacity: 0.75;
}
#omg-theme-picker > a:hover {
  opacity: 1;
}
#omg-theme-picker > a.selected {
  opacity: 1;
}

/* Theme toggle + GitHub link as one row, anchored top right (core.css
   normally anchors #omg-theme-picker there directly; "static" here lets it
   sit inline instead, with the gap coming from the flex row). */
#omg-header-tools {
  position: absolute;
  top: 5px;
  right: 5px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 20px;
}
#omg-header-tools #omg-theme-picker {
  position: static;
}

/* GitHub link, same look as the theme toggle's icons */
#omg-github {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: none;
  opacity: 0.75;
}
#omg-github svg {
  width: 30px; /* same size in every theme (the themes' generic svg rule differs) */
  height: 30px;
}
html[data-theme="evol-blue"] #omg-github svg {
  fill: white; /* like the theme toggle icons on the blue background */
}
#omg-github:hover,
#omg-github:focus-visible {
  opacity: 1;
}


/* ---------------------------------------------------------------- layout */

.content {
  max-width: 1000px;
}
.app-layout {
  display: flex;
  gap: 28px;
  align-items: flex-start;
}
.art-wrap {
  position: relative;
  flex: 0 1 600px;
  border-radius: 4px;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}
.art-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none; /* painting with a finger must not scroll the page */
}
.controls {
  flex: 0 0 250px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.controls label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.95em;
}
.controls label > span {
  display: flex;
  justify-content: space-between;
}
.controls label b {
  font-weight: 400;
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}
.controls label.check {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}
.controls select {
  font: inherit;
  padding: 3px 6px;
  border-radius: 4px;
  color: var(--input-text);
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
}
.controls input[type="range"] {
  width: 100%;
  margin: 2px 0;
  box-sizing: border-box;
  accent-color: var(--accent);
}
.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.controls button {
  margin: 0;
}
.controls button.secondary {
  background: transparent;
  color: inherit;
  border: 2px solid var(--card-border);
}
.controls button.secondary:hover,
.controls button.secondary:focus-visible {
  background: var(--card-bg);
}
.controls button.on {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.hint,
.note {
  margin: 0;
  font-size: 0.85em;
  opacity: 0.8;
}
.hint:empty {
  display: none;
}
.explain p {
  max-width: 680px;
  line-height: 1.55;
}
.footer {
  margin-top: 40px;
}
@media only screen and (max-width: 800px) {
  .app-layout {
    flex-direction: column;
  }
  .art-wrap {
    flex: none;
    width: 100%;
  }
  .controls {
    flex: none;
    width: 100%;
  }
}

/* keep the title clear of the theme toggle and GitHub icon on phones */
@media only screen and (max-width: 560px) {
  #omg-header {
    padding-top: 40px; /* the icons sit above the title */
  }
  #omg-header h1 {
    font-size: min(2em, 8.4vw);
  }
}

/* ---------------------------------------------------------------- reaction-diffusion */

:root {
  --accent: #ff6f59;
}
.art-wrap {
  aspect-ratio: 1;
  background: #06223a;
}
.art-wrap canvas {
  cursor: crosshair;
  image-rendering: auto;
}
.rd-msg {
  display: none;
}
.no-gl .rd-msg {
  display: flex;
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 40px;
  align-items: center;
  text-align: center;
  color: white;
}
.map-box {
  position: relative;
}
#fk-map {
  display: block;
  width: 100%;
  height: 150px;
  border-radius: 4px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--card-strong);
  cursor: crosshair;
  touch-action: none;
}
.map-axes {
  display: flex;
  justify-content: space-between;
  font-size: 0.75em;
  opacity: 0.7;
  margin-top: 2px;
}
.formula {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.05em;
  padding: 10px 16px;
  border-left: 3px solid var(--accent);
  background: var(--card-bg);
  border-radius: 0 6px 6px 0;
  display: inline-block;
}
.buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
}