.lithoSection{
  border-bottom: 0;
}

.lithoBack{
  margin: 0 0 0.8rem;
}

.lithoBack a{
  color: rgba(205,225,255,0.95);
  text-decoration: none;
  border-bottom: 1px solid rgba(205,225,255,0.4);
}

.lithoBack a:hover{
  border-bottom-color: rgba(205,225,255,0.85);
}

.lithoIntro{
  margin: 0 0 1rem;
  max-width: 90ch;
}

.lithoLayout{
  display: grid;
  grid-template-columns: minmax(250px, 340px) minmax(0, 1fr);
  gap: 1rem;
  align-items: stretch;
}

.lithoPanel{
  border: 1px solid rgba(233,233,239,0.18);
  border-radius: 14px;
  padding: 0.9rem;
  background: rgba(255,255,255,0.02);
}

.lithoField{
  display: grid;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.lithoField > span{
  font-size: 0.78rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: rgba(233,233,239,0.74);
}

.lithoField input[type="file"],
.lithoField input[type="number"]{
  width: 100%;
  border: 1px solid rgba(233,233,239,0.24);
  border-radius: 10px;
  padding: 0.5rem 0.55rem;
  font: inherit;
  color: var(--text);
  background: rgba(11,14,22,0.8);
}

.lithoField input[type="range"]{
  width: 100%;
}

.lithoInline{
  display: grid;
  grid-template-columns: minmax(0, 1fr) 78px auto;
  gap: 0.5rem;
  align-items: center;
}

.lithoInline span{
  color: rgba(233,233,239,0.78);
  font-size: 0.88rem;
}

.lithoStats{
  margin-top: 0.65rem;
  border: 1px solid rgba(233,233,239,0.14);
  border-radius: 10px;
  padding: 0.55rem;
  display: grid;
  gap: 0.28rem;
  font-size: 0.86rem;
  color: rgba(233,233,239,0.82);
  background: rgba(10,13,20,0.55);
}

.lithoActions{
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

.lithoActions button{
  border: 1px solid rgba(233,233,239,0.24);
  border-radius: 10px;
  padding: 0.5rem 0.64rem;
  font: inherit;
  font-weight: 700;
  color: rgba(233,233,239,0.9);
  background: rgba(255,255,255,0.04);
  cursor: pointer;
}

.lithoActions button:hover:not(:disabled){
  border-color: rgba(124,177,255,0.72);
  background: rgba(58,123,253,0.14);
}

.lithoActions button:disabled{
  opacity: 0.5;
  cursor: not-allowed;
}

#lithoDownload{
  border-color: rgba(124,177,255,0.62);
  color: rgba(210,228,255,0.95);
}

.lithoHint{
  margin: 0.7rem 0 0;
  font-size: 0.8rem;
  color: rgba(233,233,239,0.68);
}

.lithoViewportWrap{
  border: 1px solid rgba(233,233,239,0.18);
  border-radius: 14px;
  background:
    radial-gradient(120% 160% at 12% 0%, rgba(58,123,253,0.18), transparent 56%),
    rgba(6,9,14,0.8);
  padding: 0.55rem;
}

.lithoViewport{
  width: 100%;
  height: max(520px, 70vh);
  border-radius: 10px;
  overflow: hidden;
}

.lithoViewport canvas{
  display: block;
}

@media (max-width: 980px){
  .lithoLayout{
    grid-template-columns: 1fr;
  }
  .lithoViewport{
    height: max(440px, 58vh);
  }
}

@media (max-width: 520px){
  .lithoInline{
    grid-template-columns: 1fr;
  }
  .lithoActions{
    grid-template-columns: 1fr;
  }
}