/* ============ SWARM — minimal all-white UI ============ */
:root {
  --line: #000;
  --line-soft: #e4e4e4;
  --muted: rgba(0, 0, 0, 0.45);
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  display: flex;
  background: #fff;
  color: #000;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 10px;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- panel ---------- */
#panel {
  width: 240px;
  min-width: 240px;
  height: 100vh;
  border-right: 1px solid var(--line);
  overflow-y: auto;
  scrollbar-width: thin;
}
#panel::-webkit-scrollbar { width: 4px; }
#panel::-webkit-scrollbar-thumb { background: #ccc; }

header {
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--line);
}
h1 { font-size: 13px; font-weight: 700; letter-spacing: 4px; }
.sub {
  margin-top: 3px;
  font-size: 8px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--muted);
}

section {
  padding: 10px 14px 12px;
  border-bottom: 1px solid var(--line-soft);
}

h2 {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.name {
  font-size: 8px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin: 8px 0 5px;
}

.hint {
  margin-top: 8px;
  font-size: 8px;
  letter-spacing: 0.5px;
  line-height: 1.7;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- buttons ---------- */
button {
  font: inherit;
  background: #fff;
  color: #000;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 4px 6px;
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.08s, color 0.08s;
}
button:hover { background: #000; color: #fff; }
button.active { background: #000; color: #fff; }

.btn-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.btn-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.btn-grid > button:last-child:nth-child(odd) { grid-column: 1 / -1; }

.seg { display: grid; gap: 5px; }
.seg.cols-2 { grid-template-columns: 1fr 1fr; }
.seg.cols-3 { grid-template-columns: 1fr 1fr 1fr; }

/* ---------- sliders ---------- */
.row {
  display: grid;
  grid-template-columns: 1fr 40px;
  gap: 2px 8px;
  align-items: center;
  margin-bottom: 6px;
}
.row .name { margin: 0; }
.row .val {
  font-family: var(--mono);
  font-size: 9px;
  text-align: right;
  color: var(--muted);
}
.row input[type="range"] { grid-column: 1 / -1; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 12px;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track { height: 1px; background: #000; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 7px; height: 7px;
  margin-top: -3px;
  background: #000;
  border-radius: 0;
}
input[type="range"]::-moz-range-track { height: 1px; background: #000; }
input[type="range"]::-moz-range-thumb {
  width: 7px; height: 7px;
  background: #000;
  border: none;
  border-radius: 0;
}

/* ---------- behaviour rows ---------- */
.beh-row { margin-bottom: 9px; }
.beh-row:last-of-type { margin-bottom: 0; }

.chk {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 3px;
  user-select: none;
}
.chk input {
  appearance: none;
  -webkit-appearance: none;
  width: 9px;
  height: 9px;
  border: 1px solid var(--line);
  border-radius: 0;
  cursor: pointer;
  flex-shrink: 0;
}
.chk input:checked { background: #000; box-shadow: inset 0 0 0 2px #fff; }

.beh-row.off .beh-slider { opacity: 0.22; pointer-events: none; }
.beh-slider { display: grid; grid-template-columns: 1fr 40px; gap: 8px; align-items: center; }
.beh-slider .val {
  font-family: var(--mono);
  font-size: 9px;
  text-align: right;
  color: var(--muted);
}
.beh-row.off .val { opacity: 0.22; }

/* ---------- preset description ---------- */
#preset-desc {
  margin-top: 9px;
  padding-top: 8px;
  border-top: 1px solid var(--line-soft);
}
#preset-desc p {
  font-size: 8px;
  letter-spacing: 0.5px;
  line-height: 1.7;
  text-transform: uppercase;
  color: var(--muted);
}
#preset-desc .desc-title {
  color: #000;
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 3px;
}
#preset-desc .desc-how { margin-top: 5px; }

/* ---------- footer ---------- */
#stats {
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1px;
  color: var(--muted);
}

/* ---------- stage ---------- */
#stage { flex: 1; position: relative; background: #fff; }
#canvas { display: block; }