:root {
  --trainer-panel: rgba(12, 8, 26, 0.88);
  --trainer-line: rgba(255, 255, 255, 0.08);
}

.trainer-app {
  min-height: 100svh;
  padding: 16px;
}

.trainer-shell {
  width: min(1500px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 380px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.trainer-sidebar,
.trainer-main {
  display: grid;
  gap: 16px;
}

.trainer-sidebar {
  max-height: calc(100svh - 32px);
  overflow: auto;
  padding-right: 6px;
  scrollbar-gutter: stable;
}

.trainer-main {
  min-width: 0;
}

.trainer-hero,
.trainer-panel,
.trainer-preview-shell,
.trainer-stat-card {
  background: var(--trainer-panel);
  border: 1px solid var(--trainer-line);
  border-radius: 28px;
  box-shadow:
    0 26px 70px rgba(0, 0, 0, 0.38),
    0 0 0 1px rgba(255,255,255,0.03) inset;
}

.trainer-hero,
.trainer-panel,
.trainer-preview-shell,
.trainer-stat-card {
  padding: 22px;
}

.trainer-hero {
  display: grid;
  gap: 12px;
}

.trainer-hero h1,
.trainer-panel h2,
.trainer-stat-card h2,
.preview-head h2 {
  margin: 0;
}

.trainer-hero h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 0.94;
  text-transform: uppercase;
  max-width: 10ch;
}

.trainer-copy,
.trainer-status,
.preview-copy,
.trainer-field span,
.feature-name-list,
.model-meta,
.model-copy {
  color: var(--muted);
}

.trainer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trainer-link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
  text-transform: uppercase;
  color: #12071f;
  background: linear-gradient(180deg, #ffd44d, #ff8a3d);
}

.trainer-link-button.secondary {
  background: linear-gradient(180deg, #46f7ff, #72ff80);
}

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

.trainer-form-grid-hidden,
.trainer-hidden-panel {
  display: none;
}

.advanced-controls {
  margin-top: 14px;
}

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

.trainer-field {
  display: grid;
  gap: 8px;
}

.trainer-field span {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.trainer-field input,
.trainer-field select {
  width: 100%;
  border: 1px solid var(--trainer-line);
  border-radius: 14px;
  padding: 11px 12px;
  font: inherit;
  color: var(--text);
  background: rgba(255,255,255,0.06);
}

.trainer-field-wide {
  grid-column: 1 / -1;
}

.trainer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.trainer-actions button {
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 800;
  text-transform: uppercase;
  cursor: pointer;
  color: #12071f;
  background: linear-gradient(180deg, #ffd44d, #ff8a3d);
}

#auto-train-button {
  background: linear-gradient(180deg, #46f7ff, #72ff80);
}

.trainer-status {
  margin: 14px 0 0;
  min-height: 2.6em;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--trainer-line);
}

.panel-head,
.preview-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.trainer-chip {
  margin: 0;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  font-weight: 800;
}

.trainer-details summary {
  cursor: pointer;
  list-style: none;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #ffe45f;
}

.trainer-details summary::-webkit-details-marker {
  display: none;
}

.feature-name-list {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 12px;
  font-size: 0.82rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.trainer-top-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.trainer-stat-card {
  display: grid;
  gap: 8px;
}

.trainer-preview-shell {
  display: grid;
  gap: 16px;
}

.preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#trainer-preview-canvas {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  border-radius: 24px;
  border: 1px solid var(--trainer-line);
  background: #090312;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.05) inset,
    0 0 34px rgba(70, 247, 255, 0.12);
}

#trainer-swarm-canvas {
  width: 100%;
  aspect-ratio: 3 / 2;
  display: block;
  border-radius: 24px;
  border: 1px solid var(--trainer-line);
  background: #090312;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.05) inset,
    0 0 34px rgba(255, 95, 210, 0.12);
}

.preview-live-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.preview-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 16px;
}

.preview-panel {
  display: grid;
  gap: 12px;
  padding: 16px;
  border-radius: 22px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--trainer-line);
}

.output-bars {
  display: grid;
  gap: 10px;
}

.output-bar {
  display: grid;
  gap: 6px;
}

.output-bar-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.output-track {
  position: relative;
  height: 12px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,0.08);
}

.output-fill {
  position: absolute;
  top: 0;
  bottom: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, #46f7ff, #ff5fd2);
}

.sensor-legend {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.legend-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  margin-right: 8px;
}

.legend-swatch.solid { background: #d7ddff; }
.legend-swatch.hazard { background: #ff5570; }
.legend-swatch.goal { background: #46f7ff; }
.legend-swatch.reward { background: #ffe45f; }
.legend-swatch.flow { background: #72ff80; }

.trainer-model-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.history-list,
.verification-list {
  display: grid;
  gap: 10px;
}

.history-row,
.verification-card {
  display: grid;
  gap: 8px;
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--trainer-line);
  background: rgba(255,255,255,0.04);
}

.history-row-top,
.verification-top,
.verification-stage {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.history-row p,
.verification-card p,
.verification-stage p {
  margin: 0;
}

.history-row strong,
.verification-stage strong {
  color: var(--text);
}

.history-track {
  position: relative;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,0.08);
}

.history-fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, #46f7ff, #72ff80);
}

.history-meta,
.verification-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.verification-stage {
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
}

.verification-stage.is-pass {
  border: 1px solid rgba(114, 255, 128, 0.32);
}

.verification-stage.is-fail {
  border: 1px solid rgba(255, 85, 112, 0.32);
}

.model-panel {
  min-width: 0;
}

.model-list {
  display: grid;
  gap: 10px;
}

.model-card {
  display: grid;
  gap: 8px;
  padding: 14px;
  width: 100%;
  text-align: left;
  font: inherit;
  color: var(--text);
  border-radius: 20px;
  border: 1px solid var(--trainer-line);
  background: rgba(255,255,255,0.04);
  cursor: pointer;
}

.model-card:disabled {
  cursor: default;
  opacity: 0.92;
}

.model-card.is-selected {
  border-color: var(--level-accent);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.05) inset;
}

.model-card-top,
.model-card-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.model-title,
.model-meta,
.model-copy {
  margin: 0;
}

.model-title {
  font-size: 0.98rem;
  font-weight: 800;
  text-transform: uppercase;
}

.model-badge {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #12071f;
  background: linear-gradient(180deg, #87f3ff, #72ff80);
}

.compact {
  gap: 12px;
}

@media (max-width: 1200px) {
  .trainer-shell,
  .trainer-model-grid,
  .trainer-top-grid,
  .preview-grid {
    grid-template-columns: 1fr;
  }

  .trainer-sidebar {
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }
}

@media (max-width: 760px) {
  .trainer-app {
    padding: 14px;
  }

  .trainer-hero,
  .trainer-panel,
  .trainer-preview-shell,
  .trainer-stat-card {
    padding: 18px;
    border-radius: 22px;
  }

  .trainer-form-grid,
  .feature-name-list {
    grid-template-columns: 1fr;
  }

  .panel-head,
  .preview-head,
  .preview-meta,
  .trainer-actions,
  .trainer-links {
    flex-direction: column;
    align-items: flex-start;
  }
}