:root {
  color-scheme: dark;
  --mint: #5ef2b8;
  --mint-dim: #2f8f6d;
  --line: #16352b;
  --bg: #000;
  --panel: rgba(0, 0, 0, 0.76);
}

:root[data-theme="mono"] {
  --mint: #f0f0f0;
  --mint-dim: #909090;
  --line: #2a2a2a;
}

:root[data-theme="ember"] {
  --mint: #ff8a4c;
  --mint-dim: #a44f28;
  --line: #3a1c10;
}

:root[data-theme="ice"] {
  --mint: #7cc9ff;
  --mint-dim: #3f7fa6;
  --line: #173349;
}


* { box-sizing: border-box; }

html,
body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--mint);
}

body {
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 16px;
}

.layout {
  display: grid;
  grid-template-columns: clamp(14rem, 24vw, 20rem) minmax(0, 1fr);
  height: 100vh;
  height: 100dvh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--line);
}

body[data-route="home"] .sidebar {
  border-right-color: transparent;
}

.masthead {
  padding: clamp(1rem, 2.5vw, 1.75rem) clamp(1rem, 2vw, 1.5rem) 0;
}

.wordmark {
  display: inline-block;
  color: var(--mint);
  font: inherit;
  font-size: clamp(0.75rem, 3vw, 1.5rem);
  font-weight: 400;
  letter-spacing: normal;
  line-height: 1.1;
  text-decoration: none;
}

.wordmark:hover { text-decoration: underline; }

.outline {
  min-height: 0;
  padding: 1.25rem clamp(1rem, 2vw, 1.5rem) 2rem;
  overflow: auto;
  font-size: 0.9rem;
  line-height: 1.65;
}

summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  width: 100%;
  padding: 0.15rem 0;
  color: var(--mint);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

summary::-webkit-details-marker { display: none; }

summary::before {
  content: "";
  flex: none;
  width: 0.42em;
  height: 0.42em;
  border-right: 1.5px solid var(--mint-dim);
  border-bottom: 1.5px solid var(--mint-dim);
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
}

details[open] > summary::before {
  transform: rotate(45deg);
}

.outline-list {
  margin: 0;
  padding-left: 1.1rem;
  border-left: 1px solid var(--line);
  list-style: none;
}

.outline-list li { margin: 0.05rem 0; }

.leaf {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  padding: 0.15rem 0.5rem 0.15rem 0;
  color: #fff;
  font-weight: 400;
  text-decoration: none;
}

.leaf:hover { text-decoration: underline; }

.leaf.selected {
  background: #09140f;
}

.leaf.selected::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  background: var(--mint);
}

.content {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.pane {
  position: absolute;
  inset: 0;
}

.pane[hidden] { display: none; }

.idle-pane {
  display: block;
  padding: 0;
}

.home-mandel {
  pointer-events: none;
  cursor: default;
}

.lonesome-pane {
  display: grid;
  place-content: center;
  padding: 2rem;
  text-align: center;
  color: var(--mint-dim);
}

.lonesome-pane h2 {
  margin: 0 0 0.35rem;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 400;
}

.lonesome-pane p {
  margin: 0;
  color: var(--mint-dim);
  font-size: 0.8rem;
}

.viewer {
  border: 0;
  background: #000;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

.deep-canvas {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

#mandelbrot {
  position: relative;
  z-index: 0;
}

canvas:active { cursor: grabbing; }

.viewer-bar {
  position: absolute;
  z-index: 2;
  top: clamp(0.75rem, 2vw, 1.25rem);
  left: clamp(0.75rem, 2vw, 1.25rem);
  display: flex;
  align-items: baseline;
  gap: 1rem;
  font-size: 0.78rem;
}

.precision-note {
  color: var(--mint-dim);
  font-size: 0.7rem;
}

.hud {
  position: absolute;
  z-index: 2;
  top: clamp(0.75rem, 2vw, 1.25rem);
  right: clamp(0.75rem, 2vw, 1.25rem);
  color: var(--mint-dim);
  font-size: 0.68rem;
  line-height: 1.55;
  text-align: right;
  pointer-events: none;
}

.hud-label { opacity: 0.55; }

.controls.boids-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.45rem 0.8rem;
  align-items: center;
}

.controls.boids-controls .control-field {
  justify-content: space-between;
}

.controls.boids-controls input[type="range"] {
  width: 5rem;
}

.controls {
  position: absolute;
  z-index: 2;
  left: clamp(0.75rem, 2vw, 1.25rem);
  bottom: clamp(0.75rem, 2vw, 1.25rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  max-width: calc(100% - 2rem);
  padding: 0.55rem;
  border: 1px solid var(--line);
  background: var(--panel);
  font-size: 0.7rem;
}

button,
select,
input {
  font: inherit;
  color: var(--mint);
  background: transparent;
  border: 1px solid var(--line);
  padding: 0.25rem 0.5rem;
}

button,
select { cursor: pointer; }

button:hover,
select:hover { border-color: var(--mint-dim); }

.control-field {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

input[type="range"] {
  width: 6rem;
  padding: 0;
  border: 0;
  accent-color: var(--mint);
}

input[type="checkbox"] {
  width: auto;
  padding: 0;
  accent-color: var(--mint);
}

output { color: var(--mint-dim); }

.notice {
  min-height: 1em;
  color: var(--mint-dim);
}

summary:focus-visible,
.leaf:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible,
.wordmark:focus-visible {
  outline: 1px solid var(--mint);
  outline-offset: 2px;
}

@media (max-width: 900px) {
  .controls.boids-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(0, 1fr);
  }

  .sidebar {
    max-height: 45dvh;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  body[data-route="home"] .sidebar {
    border-bottom-color: transparent;
  }

  .outline {
    padding-top: 0.75rem;
    padding-bottom: 1rem;
  }

  .viewer-bar { gap: 0.6rem; }

  .hud {
    top: 3.1rem;
    font-size: 0.55rem;
  }

  .controls { right: 0.75rem; }

  .controls.boids-controls {
    grid-template-columns: 1fr;
    max-height: 34dvh;
    overflow: auto;
  }

  .controls.boids-controls input[type="range"] {
    width: min(45vw, 9rem);
  }

  input[type="range"] { width: 4rem; }
}