:root {
  --bg: #071014;
  --surface: rgba(14, 22, 24, 0.86);
  --surface-strong: rgba(13, 20, 22, 0.94);
  --border: rgba(231, 241, 238, 0.18);
  --text: #f1f8f4;
  --muted: #a5b6b1;
  --cyan: #68e7ff;
  --green: #a8f06a;
  --amber: #f7c861;
  --red: #ff6d6d;
  --ink: #071014;
  --shadow: 0 18px 55px rgba(0, 0, 0, 0.38);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 46%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.experiment {
  position: fixed;
  inset: 0;
  min-width: 320px;
  isolation: isolate;
}

canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: default;
  touch-action: none;
}

.controls {
  position: fixed;
  z-index: 3;
  top: 16px;
  left: 16px;
  width: min(316px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
}

.back-link:hover {
  color: var(--green);
}

.heading {
  display: grid;
  gap: 2px;
  margin: 4px 0 14px;
}

h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.05;
  font-weight: 780;
}

.control {
  display: grid;
  gap: 8px;
  margin-top: 13px;
}

.control.compact {
  margin-top: 10px;
  gap: 6px;
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 18px;
  font-size: 13px;
  font-weight: 700;
}

output {
  min-width: 46px;
  color: var(--amber);
  font-family: var(--mono);
  font-size: 12px;
  text-align: right;
}

input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: var(--green);
}

.mode-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-top: 14px;
}

.mode-button {
  height: 34px;
}

.mode-button.is-active {
  color: var(--ink);
  border-color: rgba(168, 240, 106, 0.74);
  background: var(--green);
}

.trainer-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.mini-control {
  display: grid;
  gap: 5px;
  min-width: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
}

.wide-control {
  grid-column: span 2;
}

.structure-editor {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.structure-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
}

.structure-actions {
  display: flex;
  gap: 5px;
}

.structure-actions button {
  height: 28px;
  min-width: 28px;
  padding: 0 8px;
  font-size: 12px;
}

.architecture-editor {
  display: grid;
  gap: 7px;
  width: 100%;
  min-width: 0;
}

.structure-node {
  display: grid;
  gap: 7px;
  min-width: 0;
  padding: 8px;
  border: 1px solid rgba(231, 241, 238, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
}

.structure-node.is-input {
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
}

.structure-node-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.structure-badge {
  min-width: 46px;
  color: var(--amber);
  font-size: 9px;
  font-weight: 850;
  text-transform: uppercase;
}

.structure-type-switch {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-width: 82px;
}

.structure-type-switch button {
  height: 28px;
  padding: 0 6px;
  border-radius: 0;
  color: var(--muted);
  font-size: 10px;
}

.structure-type-switch button:first-child {
  border-radius: 6px 0 0 6px;
}

.structure-type-switch button:last-child {
  border-radius: 0 6px 6px 0;
  border-left: 0;
}

.structure-type-switch button.is-active {
  color: var(--ink);
  border-color: rgba(168, 240, 106, 0.7);
  background: var(--green);
}

.structure-name,
.structure-meta {
  min-width: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.structure-id-input {
  width: 100%;
  min-width: 0;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  padding: 0 7px;
}

.structure-id-input:disabled {
  opacity: 0.68;
}

.structure-unit-stepper {
  display: grid;
  grid-template-columns: 24px 36px 24px;
}

.structure-unit-stepper input,
.structure-conv-param input {
  width: 36px;
  min-width: 0;
  height: 28px;
  border: 1px solid var(--border);
  border-right: 0;
  border-left: 0;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
}

.structure-unit-stepper button,
.structure-conv-param button,
.structure-remove-node,
.structure-source-chip {
  height: 28px;
  padding: 0 7px;
  font-size: 11px;
}

.structure-unit-stepper button {
  border-radius: 0;
  padding: 0;
}

.structure-conv-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  min-width: 0;
}

.structure-conv-param {
  display: grid;
  grid-template-columns: auto 22px minmax(28px, 1fr) 22px;
  align-items: center;
  min-width: 0;
}

.structure-conv-label {
  min-width: 12px;
  color: var(--amber);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 850;
}

.structure-conv-param button {
  border-radius: 0;
  padding: 0;
}

.structure-conv-param button:nth-child(2) {
  border-radius: 6px 0 0 6px;
}

.structure-conv-param button:last-child {
  border-radius: 0 6px 6px 0;
}

.structure-conv-param input {
  width: 100%;
}

.structure-unit-stepper button:first-child {
  border-radius: 6px 0 0 6px;
}

.structure-unit-stepper button:last-child {
  border-radius: 0 6px 6px 0;
}

.structure-remove-node {
  color: var(--muted);
}

.structure-source-row {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  min-width: 0;
}

.structure-source-chip {
  height: 26px;
  border-radius: 999px;
  color: var(--muted);
}

.structure-source-chip.is-active {
  color: var(--ink);
  border-color: rgba(168, 240, 106, 0.7);
  background: var(--green);
}

.stepper {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 34px;
  min-width: 0;
}

.stepper input {
  width: 100%;
  min-width: 0;
  height: 34px;
  border: 1px solid var(--border);
  border-right: 0;
  border-left: 0;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.075);
  color: var(--text);
  font: inherit;
  font-size: 13px;
  text-align: center;
}

.stepper button {
  height: 34px;
  padding: 0;
  border-radius: 0;
  font-size: 17px;
}

.stepper button:first-child {
  border-radius: 8px 0 0 8px;
}

.stepper button:last-child {
  border-radius: 0 8px 8px 0;
}

.button-grid {
  display: grid;
  grid-template-columns: 46px 1fr 1fr 46px;
  gap: 8px;
  margin-top: 15px;
}

.trainer-buttons {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.model-blob-control {
  display: grid;
  gap: 7px;
  margin-top: 10px;
  color: var(--muted);
}

.model-blob-status {
  color: var(--amber);
  font-family: var(--mono);
  font-size: 11px;
  text-align: right;
}

.model-blob-control textarea {
  width: 100%;
  min-width: 0;
  min-height: 62px;
  max-height: 134px;
  resize: vertical;
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.35;
}

.model-blob-control textarea:focus {
  outline: 2px solid rgba(168, 240, 106, 0.38);
  outline-offset: 2px;
}

button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.075);
  color: var(--text);
  font: inherit;
  font-size: 13px;
  font-weight: 750;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease;
}

button:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.28);
  transform: translateY(-1px);
}

button:active,
button.is-held {
  transform: translateY(0);
  border-color: rgba(168, 240, 106, 0.72);
  background: rgba(168, 240, 106, 0.16);
}

button.primary {
  color: var(--ink);
  border-color: rgba(168, 240, 106, 0.74);
  background: linear-gradient(135deg, var(--green), var(--cyan));
}

.readout {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 2;
  display: grid;
  grid-template-columns: auto auto auto auto;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--muted);
  box-shadow: var(--shadow);
  font-size: 12px;
  backdrop-filter: blur(14px);
}

.readout strong {
  min-width: 42px;
  color: var(--green);
  font-family: var(--mono);
  font-size: 13px;
  text-align: right;
}

.training-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0 0;
}

.training-stats div {
  min-width: 0;
}

.training-stats dt {
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.training-stats dd {
  min-width: 0;
  margin: 2px 0 0;
  color: var(--green);
  font-family: var(--mono);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toggle-control {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.toggle-control input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--green);
}

.network-window {
  position: fixed;
  z-index: 5;
  top: 18px;
  right: 18px;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  width: clamp(420px, calc(100vw - 380px), 760px);
  height: min(620px, calc(100vh - 36px));
  min-width: min(420px, calc(100vw - 32px));
  min-height: 300px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  overflow: hidden;
}

.network-window[hidden] {
  display: none;
}

.network-window.is-expanded {
  width: calc(100vw - 40px);
  height: calc(100vh - 40px);
}

.network-window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.045);
  cursor: grab;
  user-select: none;
}

.network-window-header:active {
  cursor: grabbing;
}

.network-window-header > div:first-child {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.network-window-header strong {
  font-size: 12px;
  line-height: 1.1;
  text-transform: uppercase;
}

.network-summary {
  color: var(--amber);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.25;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.network-window-actions {
  display: flex;
  gap: 6px;
  flex: 0 0 auto;
}

.network-window-actions button {
  height: 28px;
  padding: 0 8px;
  font-size: 11px;
}

.network-graph-viewport {
  min-width: 0;
  min-height: 0;
  overflow: auto;
}

.network-graph {
  display: block;
  min-width: 100%;
  min-height: 100%;
  background:
    radial-gradient(circle at 16px 16px, rgba(241, 248, 244, 0.06) 1px, transparent 1px) 0 0 / 24px 24px,
    rgba(5, 9, 12, 0.42);
}

.graph-layer-title,
.graph-input-label,
.graph-node-label,
.graph-node-value {
  font-family: var(--mono);
  paint-order: stroke;
  stroke: rgba(5, 9, 12, 0.82);
  stroke-width: 3px;
  stroke-linejoin: round;
}

.graph-layer-title {
  fill: var(--text);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.graph-input-label {
  fill: var(--muted);
  font-size: 10px;
}

.graph-node-label {
  fill: var(--muted);
  font-size: 10px;
}

.graph-node-value {
  fill: var(--text);
  font-size: 9px;
}

.graph-node circle {
  stroke: rgba(241, 248, 244, 0.48);
  stroke-width: 1;
}

.graph-node circle[data-sign="positive"] {
  fill: rgba(168, 240, 106, var(--strength, 0.18));
}

.graph-node circle[data-sign="negative"] {
  fill: rgba(255, 109, 109, var(--strength, 0.18));
}

.graph-node circle.is-active {
  stroke: var(--amber);
  stroke-width: 3;
}

.graph-edge {
  stroke-width: var(--edge-width, 0.5);
  vector-effect: non-scaling-stroke;
}

.graph-edge[data-sign="positive"] {
  stroke: rgba(168, 240, 106, var(--strength, 0.08));
}

.graph-edge[data-sign="negative"] {
  stroke: rgba(255, 109, 109, var(--strength, 0.08));
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(104, 231, 255, 0.35);
  outline-offset: 2px;
}

@media (max-width: 760px) {
  .network-window {
    top: 10px;
    right: 10px;
    width: calc(100vw - 20px);
    height: min(48vh, 420px);
    min-width: 0;
  }

  .network-window.is-expanded {
    width: calc(100vw - 20px);
    height: calc(100vh - 20px);
  }

  .network-window-header {
    padding: 8px;
  }

  .controls {
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    width: auto;
    max-height: min(62vh, 520px);
    padding: 12px 14px 14px;
    border-right: 0;
    border-bottom: 0;
    border-left: 0;
    border-radius: 8px 8px 0 0;
  }

  .heading {
    margin-bottom: 10px;
  }

  h1 {
    font-size: 23px;
  }

  .button-grid {
    grid-template-columns: 44px 1fr 1fr 44px;
    gap: 7px;
    margin-top: 12px;
  }

  .trainer-buttons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  button {
    height: 36px;
    padding: 0 7px;
    font-size: 12px;
  }

  .readout {
    right: 10px;
    bottom: 164px;
  }
}

@media (max-width: 420px) {
  .readout {
    left: 10px;
    right: auto;
  }
}

@media (max-height: 620px) and (min-width: 761px) {
  .controls {
    padding: 12px;
  }

  .button-grid {
    margin-top: 12px;
  }
}