:root {
  --bg-root: #070a0f;
  --bg-surface: #0d121b;
  --bg-elevated: #131b28;
  --bg-input: #0a0f17;
  --border-subtle: #1e293b;
  --border-strong: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #06b6d4;
  --accent-cyan-dim: rgba(6, 182, 212, 0.14);
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

body {
  background-color: var(--bg-root);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
}

.mono {
  font-family: var(--font-mono);
}

.hidden {
  display: none !important;
}

/* HEADER */
.studio-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: rgba(13, 18, 27, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
}

.brand-cluster {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-emblem {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  background: var(--accent-cyan-dim);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.35);
}

.brand-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.telemetry-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.telemetry-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.38rem 0.72rem;
  border-radius: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.telemetry-pill strong {
  color: var(--text-primary);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-amber);
}

.status-dot.online {
  background: var(--accent-emerald);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.status-dot.offline {
  background: var(--accent-rose);
}

.btn-header-link {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.42rem 0.78rem;
  border-radius: 6px;
  border: 1px solid rgba(6, 182, 212, 0.45);
  color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
  transition: background 0.15s ease;
}

.btn-header-link:hover {
  background: rgba(6, 182, 212, 0.25);
}

/* BANNER */
.studio-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.5rem;
  font-size: 0.85rem;
  background: rgba(6, 182, 212, 0.14);
  border-bottom: 1px solid rgba(6, 182, 212, 0.35);
  color: var(--text-primary);
}

.studio-banner.error {
  background: rgba(244, 63, 94, 0.16);
  border-bottom-color: rgba(244, 63, 94, 0.45);
}

.banner-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
}

/* MAIN LAYOUT */
.studio-shell {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.25rem;
  max-width: 1720px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2.5rem;
}

@media (max-width: 1120px) {
  .studio-shell {
    grid-template-columns: 1fr;
  }
}

.studio-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.panel-card,
.stage-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 1.15rem;
}

.panel-header,
.stage-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.section-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 0.15rem;
}

.panel-title {
  font-size: 1rem;
  font-weight: 600;
}

.stage-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.panel-subtext {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 0.9rem;
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--accent-cyan);
}

/* IDENTITY GRID */
.identity-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  margin-bottom: 0.95rem;
}

.identity-card {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.identity-card:hover {
  border-color: var(--border-strong);
}

.identity-card.active {
  border-color: var(--accent-cyan);
  background: var(--accent-cyan-dim);
}

.identity-avatar {
  width: 42px;
  height: 42px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid var(--border-strong);
  background: #000;
}

.identity-info {
  overflow: hidden;
}

.identity-name {
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.identity-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.identity-card.active .identity-tag {
  color: var(--accent-cyan);
}

.upload-identity-box {
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.form-title {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.upload-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.45rem;
}

.input-text,
.select-input {
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 0.48rem 0.65rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-family: var(--font-sans);
}

.input-text:focus,
.select-input:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.file-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.48rem 0.65rem;
  border-radius: 6px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  font-size: 0.78rem;
  cursor: pointer;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* CONTROLS */
.control-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.65rem;
  border-radius: 7px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
}

.control-label {
  font-size: 0.82rem;
  font-weight: 600;
}

.control-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

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

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.55rem 0.95rem;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--accent-cyan);
  color: #041016;
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-secondary {
  background: var(--bg-elevated);
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.2);
  border-color: var(--accent-rose);
  color: #fecdd3;
}

.btn-full {
  width: 100%;
}

.btn-mini {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--accent-cyan-dim);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  text-decoration: none;
}

/* TABS */
.studio-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
  margin-bottom: 1rem;
}

@media (max-width: 900px) {
  .studio-tabs {
    grid-template-columns: repeat(2, 1fr);
  }
}

.studio-tab {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 0.75rem 0.9rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-secondary);
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.studio-tab:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.studio-tab.active {
  background: var(--bg-elevated);
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  box-shadow: inset 0 2px 0 var(--accent-cyan);
}

.tab-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  padding-top: 0.1rem;
}

.tab-title {
  font-size: 0.86rem;
  font-weight: 600;
}

.tab-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* SAMPLE BAR */
.sample-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  margin-bottom: 1rem;
}

.sample-bar-label {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.sample-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.sample-pill {
  padding: 0.3rem 0.65rem;
  border-radius: 5px;
  font-size: 0.76rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  cursor: pointer;
}

.sample-pill:hover,
.sample-pill.active {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
  background: var(--accent-cyan-dim);
}

/* VIEWPORTS & GRIDS */
.stage-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem;
}

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

@media (max-width: 820px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

.viewport-box {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.viewport-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0.8rem;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.viewport-badges {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.viewport-canvas-wrap {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, #111827 0%, #070a0f 100%);
  padding: 0.5rem;
}

.viewport-img {
  max-width: 100%;
  max-height: 460px;
  border-radius: 6px;
  object-fit: contain;
}

/* LOADING OVERLAY */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(7, 10, 15, 0.82);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  z-index: 10;
  font-size: 0.84rem;
  color: var(--accent-cyan);
}

.spinner {
  width: 34px;
  height: 34px;
  border: 3px solid rgba(6, 182, 212, 0.25);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* LIVE STREAM TAB */
.stream-metrics-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  font-size: 0.76rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.stream-metrics-bar strong {
  color: var(--accent-cyan);
}

.live-stream-grid {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 1rem;
}

@media (max-width: 900px) {
  .live-stream-grid {
    grid-template-columns: 1fr;
  }
}

.stream-canvas {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  cursor: grab;
}

.crop-inspector-col {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.crop-preview-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem;
  background: #05080c;
}

.crop-canvas {
  width: 192px;
  height: 192px;
  border-radius: 6px;
  border: 1px solid var(--accent-cyan);
  object-fit: cover;
  background: #0a0f17;
}

/* PHASE 5 BODY CONTROLS & GALLERY */
.body-controls-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0.9rem;
  margin-bottom: 1rem;
  padding: 0.9rem;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

@media (max-width: 900px) {
  .body-controls-grid {
    grid-template-columns: 1fr;
  }
}

.control-block.full-span {
  grid-column: 1 / -1;
}

.block-label {
  display: block;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.preset-chip {
  padding: 0.38rem 0.7rem;
  border-radius: 6px;
  font-size: 0.76rem;
  font-weight: 600;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  cursor: pointer;
}

.preset-chip.active {
  background: var(--accent-cyan-dim);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.mode-row {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.full-width {
  width: 100%;
}

.strength-inline {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.76rem;
}

.phase5-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (max-width: 820px) {
  .phase5-gallery {
    grid-template-columns: 1fr;
  }
}

/* ARCHITECTURE TAB */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  margin-bottom: 1rem;
}

.arch-card {
  padding: 0.9rem;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

.arch-tag {
  font-size: 0.68rem;
  color: var(--accent-cyan);
  margin-bottom: 0.25rem;
}

.arch-card h3 {
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.arch-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.code-panel {
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  overflow: hidden;
}

.code-block {
  padding: 1rem;
  background: #05080c;
  color: #a5f3fc;
  font-size: 0.78rem;
  overflow-x: auto;
  max-height: 420px;
}