/* ==========================================================================
   ShrinkOS — Interactive ML & Math Lab Stylesheet (css/lab.css)
   Zero external dependencies — Clean vanilla CSS3
   ========================================================================== */

.lab-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.lab-panel {
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: border-color 0.2s ease;
}

.lab-panel:hover {
  border-color: var(--border-bright);
}

.lab-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: #090e15;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.lab-panel-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-bright);
}

.lab-tag {
  font-family: var(--mono);
  font-size: 0.62rem;
  padding: 0.18rem 0.45rem;
  border-radius: 4px;
  background: rgba(122, 162, 247, 0.1);
  border: 1px solid var(--border-subtle);
  color: var(--accent-cyan);
}

.lab-body {
  padding: 1.5rem;
}

/* --------------------------------------------------------------------------
   Tool 1: Confusion Matrix & Metric Analyzer
   -------------------------------------------------------------------------- */
.matrix-workbench {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.matrix-inputs-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.matrix-inputs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.input-cell {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.input-cell label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
}

.input-cell label span {
  color: var(--accent);
}

.input-cell input[type="number"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-bright);
  font-family: var(--mono);
  font-size: 0.9rem;
  outline: 0;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-cell input[type="number"]:focus {
  border-color: var(--accent);
  box-shadow: var(--glow);
}

.matrix-presets {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.matrix-presets button {
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  background: var(--surface);
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.matrix-presets button:hover {
  color: var(--accent-cyan);
  border-color: var(--accent);
  background: var(--surface-hover);
}

/* 2x2 Matrix Graphic */
.matrix-visual-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.matrix-table-wrap {
  position: relative;
  padding: 1.25rem;
  background: #090e15;
  border: 1px solid var(--border);
  border-radius: var(--r);
}

.matrix-axis-label-top {
  text-align: center;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.matrix-grid-2x2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.matrix-quadrant {
  min-height: 84px;
  padding: 0.75rem;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-family: var(--mono);
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.matrix-quadrant.positive-hit {
  background: rgba(158, 206, 106, 0.15);
  border-color: rgba(158, 206, 106, 0.35);
  color: var(--accent-green);
}

.matrix-quadrant.negative-hit {
  background: rgba(122, 162, 247, 0.15);
  border-color: rgba(122, 162, 247, 0.35);
  color: var(--accent-cyan);
}

.matrix-quadrant.error-hit {
  background: rgba(247, 118, 142, 0.14);
  border-color: rgba(247, 118, 142, 0.35);
  color: var(--accent-red);
}

.quadrant-title {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  opacity: 0.85;
  margin-bottom: 0.2rem;
}

.quadrant-value {
  font-size: 1.4rem;
  font-weight: 800;
  line-height: 1;
}

.quadrant-pct {
  font-size: 0.62rem;
  opacity: 0.75;
  margin-top: 0.25rem;
}

/* Metrics Cards Row */
.metrics-display-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.65rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.metric-card {
  padding: 0.75rem;
  background: #090e15;
  border: 1px solid var(--border);
  border-radius: 6px;
  text-align: center;
}

.metric-name {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.metric-val {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.metric-formula {
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

/* --------------------------------------------------------------------------
   Tool 2: Activation Function & Gradient Visualizer
   -------------------------------------------------------------------------- */
.activation-workbench {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.75rem;
}

.activation-controls-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.control-group label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
}

.select-terminal {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-bright);
  font-family: var(--mono);
  font-size: 0.82rem;
  outline: 0;
  cursor: pointer;
}

.select-terminal:focus {
  border-color: var(--accent);
  box-shadow: var(--glow);
}

/* Range Slider */
.slider-terminal {
  width: 100%;
  height: 6px;
  background: var(--bg-alt);
  border-radius: 999px;
  outline: 0;
  cursor: pointer;
  accent-color: var(--accent);
}

/* Formula & Math Info Box */
.math-info-box {
  padding: 1rem;
  background: #090e15;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.math-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px dashed var(--border-subtle);
  padding-bottom: 0.4rem;
}

.math-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.math-label {
  color: var(--text-muted);
}

.math-val {
  color: var(--accent-green);
  font-weight: 700;
}

.math-val.derivative {
  color: var(--accent-amber);
}

/* Canvas Container */
.canvas-wrapper {
  position: relative;
  width: 100%;
  background: #080c12;
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.canvas-toolbar {
  width: 100%;
  padding: 0.5rem 0.85rem;
  background: #090e15;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.canvas-legend {
  display: flex;
  gap: 0.85rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.legend-line {
  width: 12px;
  height: 2px;
  display: inline-block;
}

.legend-line.func {
  background: var(--accent-cyan);
}

.legend-line.grad {
  background: var(--accent-amber);
}

canvas#activationCanvas {
  display: block;
  width: 100%;
  height: 320px;
  cursor: crosshair;
}

/* --------------------------------------------------------------------------
   Tool 3: In-Browser CSV / Dataset Profiler
   -------------------------------------------------------------------------- */
.dropzone-container {
  border: 2px dashed var(--border);
  border-radius: var(--r);
  padding: 2.2rem 1.5rem;
  text-align: center;
  background: rgba(16, 22, 34, 0.4);
  transition: all 0.2s ease;
  cursor: pointer;
  margin-bottom: 1.5rem;
}

.dropzone-container.dragover {
  border-color: var(--accent-cyan);
  background: rgba(125, 207, 255, 0.08);
  box-shadow: var(--glow);
}

.dropzone-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--accent);
}

.dropzone-text {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-bright);
  margin-bottom: 0.25rem;
}

.dropzone-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.dropzone-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Profiler Summary Badges */
.profiler-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.summary-badge {
  padding: 0.85rem;
  background: #090e15;
  border: 1px solid var(--border);
  border-radius: 6px;
  text-align: center;
}

.summary-badge dt {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.summary-badge dd {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-green);
}

/* Data & Stats Tables */
.table-scroll-container {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  background: #090e15;
  margin-bottom: 1.5rem;
}

.terminal-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-align: left;
}

.terminal-table th {
  background: #0d141e;
  color: var(--accent);
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  white-space: nowrap;
}

.terminal-table td {
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid rgba(122, 162, 247, 0.08);
  color: var(--text);
  white-space: nowrap;
}

.terminal-table tr:last-child td {
  border-bottom: 0;
}

.terminal-table tr:hover td {
  background: rgba(122, 162, 247, 0.05);
}

.type-pill {
  display: inline-block;
  padding: 0.12rem 0.35rem;
  border-radius: 3px;
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
}

.type-pill.numeric {
  background: rgba(158, 206, 106, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(158, 206, 106, 0.3);
}

.type-pill.categorical {
  background: rgba(187, 154, 247, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(187, 154, 247, 0.3);
}

/* Responsive */
@media (max-width: 850px) {
  .matrix-workbench {
    grid-template-columns: 1fr;
  }
  .activation-workbench {
    grid-template-columns: 1fr;
  }
  .metrics-display-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .profiler-summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 550px) {
  .lab-body {
    padding: 0.9rem;
  }
  .lab-panel-header {
    padding: 0.75rem 0.9rem;
  }
  .metrics-display-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  .metric-card {
    padding: 0.6rem 0.4rem;
  }
  .metric-val {
    font-size: 1rem;
  }
  .profiler-summary-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  canvas#activationCanvas {
    height: 250px;
  }
  .matrix-quadrant {
    min-height: 72px;
    padding: 0.5rem;
  }
  .quadrant-value {
    font-size: 1.2rem;
  }
}