:root {
  --bg: #101318;
  --panel: #181d25;
  --panel2: #202734;
  --text: #f2f5f8;
  --muted: #aeb8c5;
  --line: #343d4c;
  --accent: #7cc5ff;
  --good: #54d68a;
  --bad: #ff9b73;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
  border: 0;
  border-radius: 8px;
  padding: 10px 12px;
  color: #071018;
  background: var(--accent);
  font-weight: 700;
}

button.secondary {
  background: #2d3748;
  color: var(--text);
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

input,
select {
  width: 100%;
  padding: 9px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #0f141c;
  color: var(--text);
}

label {
  display: block;
  margin: 12px 0;
  color: var(--muted);
}

code,
pre {
  background: #0f141c;
  border: 1px solid var(--line);
  border-radius: 8px;
}

pre {
  white-space: pre-wrap;
  padding: 12px;
  min-height: 110px;
}

.topbar {
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.topbar h1 {
  margin: 0 0 6px;
  font-size: 24px;
}

.topbar p,
.hint {
  color: var(--muted);
  margin: 0;
}

.layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  padding: 16px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
}

.controls h2,
.visual h2 {
  margin: 18px 0 8px;
  font-size: 18px;
}

.controls h2:first-child,
.visual h2:first-child {
  margin-top: 0;
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 8px 0;
}

.status {
  color: var(--muted);
  font-size: 14px;
  min-height: 40px;
  padding: 8px 0;
}

.fileLabel input {
  margin-top: 7px;
}

.visualHeader {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.predictionBox {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  min-width: 160px;
  text-align: center;
  font-size: 18px;
}

.canvases {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 16px;
  margin-top: 16px;
}

.imageCard,
.networkCard,
.detailsCard,
.graphCard {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}

.imageCard h3,
.detailsCard h3,
.graphCard h3 {
  margin: 0 0 10px;
  font-size: 16px;
}

#mnistCanvas,
#lossCanvas {
  width: 100%;
  background: #05070a;
  border-radius: 8px;
  display: block;
}

.labelBox {
  text-align: center;
  margin-top: 10px;
  font-size: 18px;
}

.networkCard {
  min-height: 540px;
}

#networkSvg {
  width: 100%;
  height: 520px;
  background: #0b0f15;
  border-radius: 8px;
}

.detailsAndGraph {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  margin-top: 16px;
}

.node {
  cursor: pointer;
  stroke: #e8eef7;
  stroke-width: 1.5;
  transition: r 120ms linear, stroke-width 120ms linear;
}

.node:hover {
  stroke-width: 4;
}

.edge {
  cursor: pointer;
  transition: stroke-width 120ms linear, opacity 120ms linear;
}

.edge:hover {
  stroke-width: 5;
  opacity: 1;
}

.layerText,
.nodeText {
  fill: var(--muted);
  font-size: 13px;
  pointer-events: none;
}

.nodeText {
  font-size: 10px;
}

.inputImageBox {
  fill: #101722;
  stroke: var(--accent);
  stroke-width: 2;
}

@media (max-width: 1100px) {
  .layout,
  .canvases,
  .detailsAndGraph {
    grid-template-columns: 1fr;
  }

  .controls {
    order: 1;
  }
}