/* Studio workbenches — VeloAlpha-dark aligned */
.studio-page {
  --studio-bg: #0a0e12;
  --studio-card: #0f1419;
  --studio-line: rgba(58, 196, 196, 0.28);
  --studio-ink: #f2f5f0;
  --studio-muted: #8a9aa8;
  --studio-blue: #3ac4c4;
  --studio-blue-hover: #5ad5d5;
  --studio-green: #5dca8a;
  --studio-warn: #e8a23a;
  --studio-radius: 12px;
  --studio-header-h: 56px;
  --coral: #ff7a45;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  color: var(--studio-ink);
  background: var(--studio-bg);
  min-height: 100vh;
}

.studio-page .atmosphere {
  display: block;
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(800px 420px at 10% 0%, rgba(58, 196, 196, 0.1), transparent 55%),
    linear-gradient(180deg, #070b0f, #0a0e12);
  pointer-events: none;
}

.studio-header {
  height: var(--studio-header-h);
  background: rgba(10, 14, 18, 0.92);
  border-bottom: 1px solid var(--studio-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.studio-brand {
  font-family: "Bricolage Grotesque", "Syne", sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--coral);
  letter-spacing: -0.02em;
}
.studio-brand small {
  font-weight: 500;
  color: var(--studio-blue);
  font-size: 0.75rem;
  margin-left: 0.45rem;
  font-family: var(--mono);
}

.studio-nav {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.82rem;
  font-family: var(--mono);
}
.studio-nav a { color: var(--studio-muted); }
.studio-nav a:hover,
.studio-nav a[aria-current="page"] { color: var(--studio-ink); }

.studio-layout {
  display: grid;
  grid-template-columns: minmax(300px, 380px) 1fr;
  gap: 0;
  min-height: calc(100vh - var(--studio-header-h));
}
@media (max-width: 900px) {
  .studio-layout { grid-template-columns: 1fr; }
}

.studio-input {
  background: var(--studio-card);
  border-right: 1px solid var(--studio-line);
  padding: 1rem 1.1rem 2rem;
  overflow-y: auto;
  max-height: calc(100vh - var(--studio-header-h));
}

.studio-output {
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.studio-title {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--coral);
}

.studio-sub {
  margin: 0 0 1rem;
  color: var(--studio-muted);
  font-size: 0.85rem;
  line-height: 1.45;
  font-family: var(--mono);
}

.studio-tabs {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.studio-tab {
  appearance: none;
  border: 1px solid var(--studio-line);
  background: transparent;
  color: var(--studio-muted);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  font: inherit;
  font-size: 0.8rem;
  font-family: var(--mono);
  cursor: pointer;
}
.studio-tab.is-active {
  background: var(--studio-blue);
  border-color: var(--studio-blue);
  color: #041414;
}

.studio-field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  margin-bottom: 1rem;
}
.studio-field { display: grid; gap: 0.25rem; }
.studio-field label {
  font-size: 0.78rem;
  color: var(--studio-muted);
  font-family: var(--mono);
}
.studio-field input,
.studio-field select,
.studio-field textarea {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: 1px solid rgba(168, 214, 230, 0.14);
  border-radius: 8px;
  font: inherit;
  font-size: 0.9rem;
  background: rgba(5, 10, 16, 0.8);
  color: var(--studio-ink);
}
.studio-field input:focus,
.studio-field select:focus {
  outline: 2px solid rgba(58, 196, 196, 0.28);
  border-color: var(--studio-blue);
}
.studio-field.full { grid-column: 1 / -1; }

.studio-btn {
  appearance: none;
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1rem;
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  width: 100%;
  margin-top: 0.5rem;
}
.studio-btn-primary { background: var(--studio-blue); color: #041414; }
.studio-btn-primary:hover { background: var(--studio-blue-hover); }
.studio-btn-secondary {
  background: transparent;
  color: var(--studio-ink);
  border: 1px solid var(--studio-line);
}
.studio-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.studio-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.5rem;
}
.studio-metric {
  background: var(--studio-card);
  border: 1px solid var(--studio-line);
  border-radius: var(--studio-radius);
  padding: 0.65rem 0.75rem;
}
.studio-metric span {
  display: block;
  font-size: 0.72rem;
  color: var(--studio-muted);
  font-family: var(--mono);
}
.studio-metric strong {
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--studio-ink);
}

.studio-card {
  background: var(--studio-card);
  border: 1px solid var(--studio-line);
  border-radius: var(--studio-radius);
  overflow: hidden;
}
.studio-card-head {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid rgba(168, 214, 230, 0.12);
  font-weight: 600;
  font-size: 0.88rem;
  font-family: var(--mono);
  color: var(--studio-blue);
}
.studio-canvas-wrap { position: relative; min-height: 280px; background: #fff; }
.studio-canvas-wrap canvas { display: block; width: 100%; height: 100%; }

.studio-chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}
@media (max-width: 1100px) {
  .studio-chart-grid { grid-template-columns: 1fr; }
}

.studio-status {
  font-size: 0.82rem;
  color: var(--studio-muted);
  margin: 0.5rem 0 0;
  font-family: var(--mono);
}
.studio-status.ok { color: var(--studio-green); }
.studio-status.err { color: #e37a6a; }

.plot3d-page .studio-layout { grid-template-columns: 1fr; }
.plot3d-main {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--studio-header-h));
  padding: 0.75rem;
  gap: 0.5rem;
}
.plot3d-viewport {
  flex: 1;
  min-height: 360px;
  background: #0a1016;
  border: 1px solid var(--studio-line);
  border-radius: var(--studio-radius);
  position: relative;
  overflow: hidden;
}
.plot3d-viewport canvas { display: block; width: 100%; height: 100%; }
.plot3d-toolbar { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }
.plot3d-toolbar button {
  appearance: none;
  border: 1px solid var(--studio-line);
  background: var(--studio-card);
  color: var(--studio-ink);
  border-radius: 6px;
  padding: 0.4rem 0.65rem;
  font: inherit;
  font-size: 0.78rem;
  font-family: var(--mono);
  cursor: pointer;
}
.plot3d-toolbar button:hover { border-color: var(--studio-blue); color: var(--studio-blue); }
.plot3d-expr-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  background: var(--studio-card);
  border: 1px solid var(--studio-line);
  border-radius: var(--studio-radius);
  padding: 0.55rem 0.75rem;
}
.plot3d-expr-row input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--studio-ink);
  font-family: var(--mono);
  font-size: 0.95rem;
  outline: none;
}
.plot3d-expr-row label {
  font-size: 0.82rem;
  color: var(--studio-muted);
  white-space: nowrap;
  font-family: var(--mono);
}

.model-viewport {
  flex: 1;
  min-height: 420px;
  background: linear-gradient(180deg, #0a1628 0%, #0f1a28 100%);
  border: 1px solid var(--studio-line);
  border-radius: var(--studio-radius);
  position: relative;
  overflow: hidden;
}
.model-hud {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  right: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 0.75rem;
  pointer-events: none;
}
.model-hud > * { pointer-events: auto; }
.model-tip {
  background: rgba(0, 0, 0, 0.55);
  color: #e2e8f0;
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  font-size: 0.78rem;
  font-family: var(--mono);
}
.model-info {
  background: rgba(15, 20, 25, 0.95);
  border: 1px solid var(--studio-line);
  border-radius: 8px;
  padding: 0.65rem 0.85rem;
  font-size: 0.85rem;
  max-width: 220px;
  display: none;
  color: var(--studio-ink);
}
.model-info.is-open { display: block; }

.model-slider-row { display: grid; gap: 0.35rem; margin: 0.75rem 0; }
.model-slider-row label {
  font-size: 0.78rem;
  color: var(--studio-muted);
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
}
.model-slider-row input[type="range"] { width: 100%; }

.upload-zone {
  border: 1px dashed var(--studio-line);
  border-radius: var(--studio-radius);
  padding: 1.25rem;
  text-align: center;
  color: var(--studio-muted);
  font-size: 0.85rem;
  font-family: var(--mono);
  cursor: pointer;
  margin-bottom: 0.75rem;
  transition: border-color 0.2s, background 0.2s;
}
.upload-zone:hover,
.upload-zone.is-drag {
  border-color: var(--studio-blue);
  background: rgba(58, 196, 196, 0.06);
}
.upload-zone input { display: none; }

.preset-row {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}
.preset-chip {
  appearance: none;
  border: 1px solid var(--studio-line);
  background: transparent;
  color: var(--studio-muted);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  font-family: var(--mono);
  cursor: pointer;
}
.preset-chip.is-active {
  background: rgba(58, 196, 196, 0.15);
  border-color: var(--studio-blue);
  color: var(--studio-blue);
}

.legend-bar {
  height: 12px;
  border-radius: 4px;
  background: linear-gradient(90deg, #312e81, #2563eb, #22c55e, #eab308, #ef4444);
  margin-top: 0.35rem;
}
.legend-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--studio-muted);
  font-family: var(--mono);
}