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

:root {
  --ink: #e8e0d0;
  --ink-dim: #7a7060;
  --paper: #0f0e0c;
  --paper-2:  #1a1916;
  --paper-3: #252320;
  --gold: #c9a84c;
  --gold-dim:  #7a6330;
  --radius: 4px;
}

html, body {
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  line-height: 1.6;
}

.page {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  padding: 48px 0 48px;
  border-bottom: 1px solid var(--paper-3);
}

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

h1 {
  font-family: 'IM Fell English', serif;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.15;
  color: var(--ink);
  font-weight: 400;
  margin-bottom: 16px;
}

h1 em {
  font-style: italic;
  color: var(--gold);
}

.subtitle {
  font-size: 13px;
  color: var(--ink-dim);
  max-width: 520px;
  line-height: 1.7;
}

.subtitle a {
  color: var(--ink-dim);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.subtitle a:hover {color: var(--ink);}

.stats {
  display: flex;
  gap: 32px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-value {
  font-size: 18px;
  font-weight: 500;
  color: var(--gold);
}

.stat-label {
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

main {padding: 40px 0; }

.controls {
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.field {margin-bottom: 20px;}
.field:last-child {margin-bottom: 0;}

label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 8px;
}

textarea {
  width: 100%;
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  padding: 12px 14px;
  resize: vertical;
  min-height: 80px;
  transition: border-color 0.15s;
  outline: none;
}

textarea:focus {border-color: var(--gold-dim);}

.slider-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

input[type=range] {
  flex: 1;
  appearance: none;
  height: 2px;
  background: var(--paper-3);
  border-radius: 1px;
  outline: none;
}

input[type=range]::-webkit-slider-thumb {
  appearance:none;
  width:14px;
  height:14px;
  border-radius:50%;
  background:var(--gold);
  cursor:pointer;
  transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }

.slider-val {
  width: 38px;
  text-align: right;
  color: var(--gold);
  font-size: 13px;
  font-weight: 500;
}

.time-hint {
  margin: 8px 0 0;
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 0.02em;
}

.btn-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
}

button {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  padding: 11px 22px;
  transition: opacity 0.15s, transform 0.1s;
}

button:active { transform: scale(0.98); }

.btn-primary {
  background: var(--gold);
  color: var(--paper);
}

.btn-primary:hover {opacity: 0.9;}
.btn-primary:disabled {opacity: 0.4; cursor: not-allowed; transform:none;}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--paper-3);
  color: var(--ink-dim);
}
 
.btn-ghost:hover { border-color: var(--ink-dim); color: var(--ink); }
 
.output-wrap {
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  min-height: 200px;
  position: relative;
  overflow: hidden;
}
 
.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--paper-3);
}
 
.output-label {
  font-size: 11px;
  color: var(--ink-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
 
.output-status {
  font-size: 11px;
  color: var(--ink-dim);
}
 
.output-status.generating { color: var(--gold); }
.output-status.done { color: #6a9a6a; }
.output-status.error { color: #c06060; }
 
#output-text {
  font-family: 'IM Fell English', serif;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  padding: 24px;
  white-space: pre-wrap;
  min-height: 160px;
}
 
#output-text.empty {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--ink-dim);
  font-style: normal;
}
 
.cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--gold);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
 
@keyframes blink {0%, 100% {opacity: 1;} 50% {opacity: 0;}}
 
footer {
  padding: 24px 0;
  border-top: 1px solid var(--paper-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
 
.footer-left {
  font-size: 12px;
  color: var(--ink-dim);
}
 
.footer-links {
  display: flex;
  gap: 20px;
}
 
.footer-links a {
  font-size: 12px;
  color: var(--ink-dim);
  text-decoration: none;
  letter-spacing: 0.04em;
}
 
.footer-links a:hover { color: var(--ink); }
 
.prompts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
 
.prompt-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 2px;
  background: var(--paper);
  border: 1px solid var(--paper-3);
  color: var(--ink-dim);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
 
.prompt-chip:hover {
  border-color: var(--gold-dim);
  color: var(--ink);
}
 
@media (max-width: 480px) {
  .stats { gap: 20px; }
  .btn-row { flex-direction: column; align-items: stretch; }
  .mnist-layout { grid-template-columns: 1fr; }
}

.hub-page main {
  padding: 24px 0 48px;
}

.back-link {
  color: var(--gold);
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

.example-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.example-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  background: var(--paper-2);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s, transform 0.1s;
}

.example-card:hover {
  border-color: var(--gold-dim);
  transform: translateY(-2px);
}

.example-tag {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.example-card h2 {
  font-family: 'IM Fell English', serif;
  font-size: 28px;
  font-weight: 400;
  color: var(--ink);
}

.example-card p {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.7;
  flex: 1;
}

.example-link {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.mnist-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
}

.canvas-wrap {
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  padding: 16px;
}

#draw-canvas {
  display: block;
  width: 280px;
  height: 280px;
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  background: #000;
  touch-action: none;
  cursor: crosshair;
}

.canvas-hint {
  margin-top: 10px;
  font-size: 11px;
  color: var(--ink-dim);
  text-align: center;
}

.mnist-controls {
  margin-bottom: 0;
}

.prediction {
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 180px;
}

.prediction-label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.prediction-digit {
  font-family: 'IM Fell English', serif;
  font-size: 72px;
  line-height: 1;
  color: var(--gold);
}

.prediction-status {
  font-size: 11px;
  color: var(--ink-dim);
}

.prediction-status.generating { color: var(--gold); }
.prediction-status.done { color: #6a9a6a; }
.prediction-status.error { color: #c06060; }

.network-viz {
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--paper-3);
}

.viz-title {
  font-family: 'IM Fell English', serif;
  font-size: 28px;
  font-weight: 400;
  margin-bottom: 8px;
}

.viz-subtitle {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 620px;
}

.mlp-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
}

.mlp-layer {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  background: var(--paper);
  min-width: 88px;
}

.mlp-layer-active {
  background: var(--paper-2);
  border-color: var(--gold-dim);
}

.mlp-layer-output {
  border-color: var(--gold);
}

.mlp-layer-name {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold);
}

.mlp-layer-dim {
  font-size: 13px;
  color: var(--ink);
}

.mlp-layer-note {
  font-size: 10px;
  color: var(--ink-dim);
}

.mlp-arrow {
  color: var(--ink-dim);
  font-size: 16px;
}

.viz-panel {
  background: var(--paper-2);
  border: 1px solid var(--paper-3);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.viz-panel-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 12px;
}

.viz-panel-hint {
  text-transform: none;
  letter-spacing: 0;
  font-size: 11px;
}

.hidden-strip {
  display: grid;
  grid-template-columns: repeat(64, 1fr);
  gap: 2px;
}

.hidden-cell {
  aspect-ratio: 1;
  border-radius: 1px;
  background: var(--gold);
  opacity: 0.08;
  transition: opacity 0.2s ease;
}

.logits-chart {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 8px;
  align-items: end;
  height: 140px;
}

.logit-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  height: 100%;
}

.logit-col.winner .logit-fill {
  background: var(--gold);
}

.logit-col.winner .logit-label {
  color: var(--gold);
}

.logit-bar {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: flex-end;
  background: var(--paper);
  border: 1px solid var(--paper-3);
  border-radius: 2px 2px 0 0;
  min-height: 100px;
}

.logit-fill {
  width: 100%;
  height: 0%;
  background: var(--gold-dim);
  border-radius: 2px 2px 0 0;
  transition: height 0.25s ease;
}

.logit-label {
  font-size: 12px;
  color: var(--ink-dim);
}

@media (max-width: 480px) {
  .hidden-strip {
    grid-template-columns: repeat(32, 1fr);
  }

  .mlp-flow {
    gap: 6px;
  }

  .mlp-layer {
    min-width: 72px;
    padding: 10px;
  }
}