/* Topology optimizer — widget styling on Ravi's red/black palette. */

.topo-page { max-width: 820px; }

.topo-section { margin-top: 2rem; }
.topo-section .blurb {
  color: var(--bone-dim);
  font-size: 0.98rem;
  margin-bottom: 1.25rem;
}
.sw-force   { color: var(--red-hot); font-weight: 600; }
.sw-support { color: #35c08a; font-weight: 600; }

.topo-app {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: 2px;
  padding: 1.1rem;
}

/* ---- toolbar ---- */
.topo-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
}
.topo-tool {
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bone-dim);
  background: var(--black-soft);
  border: 1px solid var(--line-hi);
  border-radius: 2px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
  transition: all 0.18s ease;
}
.topo-tool:hover { color: var(--bone); border-color: var(--bone-faded); }
.topo-tool.active {
  color: var(--black);
  background: var(--red);
  border-color: var(--red);
  font-weight: 700;
  box-shadow: 0 0 14px -2px rgba(255, 36, 54, 0.6);
}

/* ---- canvas ---- */
.topo-canvas-wrap { position: relative; }
.topo-canvas {
  display: block;
  width: 100%;
  height: auto;
  background:
    radial-gradient(circle at 30% 20%, #121212, #0c0c0c);
  border: 1px solid var(--line);
  border-radius: 2px;
  touch-action: none;
  cursor: crosshair;
}
.topo-hint {
  position: absolute;
  left: 0.6rem; top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--bone-faded);
  background: rgba(10, 10, 10, 0.72);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.25rem 0.5rem;
  pointer-events: none;
  letter-spacing: 0.03em;
}

/* ---- controls ---- */
.topo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.4rem;
  margin: 0.95rem 0 0.7rem;
}
.topo-file span {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bone);
  background: var(--black-soft);
  border: 1px solid var(--line-hi);
  border-radius: 2px;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  transition: all 0.18s ease;
}
.topo-file:hover span { border-color: var(--red); color: var(--red); }

.topo-slider { display: flex; align-items: center; gap: 0.55rem; }
.topo-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--bone-faded);
}
.topo-val {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--red);
  min-width: 2.6rem;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 130px;
  height: 3px;
  background: var(--line-hi);
  border-radius: 2px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--red);
  cursor: pointer;
  box-shadow: 0 0 8px -1px rgba(255, 36, 54, 0.7);
}
input[type="range"]::-moz-range-thumb {
  width: 15px; height: 15px; border: none;
  border-radius: 50%; background: var(--red); cursor: pointer;
}

/* ---- action buttons ---- */
.topo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.3rem;
}
.topo-btn {
  font-family: var(--mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--bone);
  background: var(--surface-hi);
  border: 1px solid var(--line-hi);
  border-radius: 2px;
  padding: 0.5rem 0.95rem;
  cursor: pointer;
  transition: all 0.18s ease;
}
.topo-btn:hover { border-color: var(--bone-faded); }
.topo-btn.primary {
  background: var(--red);
  border-color: var(--red);
  color: var(--black);
  font-weight: 700;
}
.topo-btn.primary:hover {
  background: var(--red-hot);
  box-shadow: 0 0 18px -2px rgba(255, 36, 54, 0.65);
}
.topo-btn.secondary { color: var(--bone-dim); }
.topo-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ---- status ---- */
.topo-status {
  margin-top: 0.85rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--bone-dim);
  line-height: 1.5;
  min-height: 1.2rem;
  border-top: 1px solid var(--line);
  padding-top: 0.7rem;
}
.topo-status.busy { color: var(--red); }
.topo-status.error { color: var(--red-hot); }

/* ---- benchmark library ---- */
.bench-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.9rem;
}
.bench {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: 2px;
  padding: 1rem 1.1rem 1.1rem;
  display: flex;
  flex-direction: column;
}
.bench-head { margin-bottom: 0.5rem; }
.bench-head h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--bone);
  margin: 0 0 0.15rem;
  border: none;
  padding: 0;
}
.bench-study {
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--red);
}
.bench p {
  font-size: 0.86rem;
  color: var(--bone-dim);
  line-height: 1.5;
  margin: 0 0 0.9rem;
  flex: 1;
}
.bench-actions {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.bench-src {
  font-family: var(--mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--bone-faded) !important;
  border: none !important;
}
.bench-src:hover { color: var(--red) !important; }

@media (max-width: 560px) {
  input[type="range"] { width: 96px; }
  .topo-tool, .topo-btn { font-size: 0.7rem; padding: 0.4rem 0.6rem; }
}