/* ==========================================================================
   vToastWeb — Global Stylesheet
   All styling via classes. NO inline styles in HTML/JS.
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables — Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Color palette */
  --color-bg:        #0f0f14;
  --color-panel:     #1a1a24;
  --color-panel-alt: #22222f;
  --color-border:    #2e2e42;
  --color-text:      #e8e8f0;
  --color-text-muted:#8888a8;
  --color-accent:    #7c6af7;
  --color-accent-h:  #9a8bff;
  --color-danger:    #e05c5c;
  --color-success:   #4caf84;
  --color-warning:   #e0a84a;

  /* Border radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  14px;
  --radius-xl:  22px;

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;

  /* Typography */
  --font-mono: 'Courier New', Courier, monospace;
  --font-ui:   system-ui, -apple-system, sans-serif;
  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 15px;
  --text-lg:   18px;
  --text-xl:   22px;

  /* Transition */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

.app-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  z-index: 10;
}

.app-logo {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-accent);
}

.app-logo span {
  color: var(--color-text);
}

.app-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar nav */
.sidebar {
  display: flex;
  flex-direction: column;
  width: 56px;
  background: var(--color-panel);
  border-right: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  gap: var(--space-2);
  flex-shrink: 0;
  align-items: center;
}

.sidebar-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-xs);
  gap: 3px;
  transition: background var(--transition-fast), color var(--transition-fast);
  text-align: center;
  padding: var(--space-1);
}

.sidebar-btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-btn:hover {
  background: var(--color-panel-alt);
  color: var(--color-text);
}

.sidebar-btn.active {
  background: var(--color-accent);
  color: #fff;
}

/* Main content area */
.view-container {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.view {
  display: none;
  width: 100%;
  height: 100%;
  overflow: auto;
}

.view.active {
  display: flex;
  flex-direction: column;
}

/* --------------------------------------------------------------------------
   Panels / Cards
   -------------------------------------------------------------------------- */
.panel {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  gap: var(--space-3);
}

.panel-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card {
  background: var(--color-panel-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-family: var(--font-ui);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  line-height: 1.4;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

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

.btn-primary:hover {
  background: var(--color-accent-h);
}

.btn-secondary {
  background: var(--color-panel-alt);
  border-color: var(--color-border);
  color: var(--color-text);
}

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

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover {
  background: #f07070;
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn-icon {
  padding: var(--space-2);
  width: 32px;
  height: 32px;
}

/* --------------------------------------------------------------------------
   Form Controls
   -------------------------------------------------------------------------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.form-input,
.form-select {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  width: 100%;
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--color-accent);
}

.form-input[type="range"] {
  padding: 0;
  height: 20px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.form-input[type="file"] {
  padding: var(--space-2);
  cursor: pointer;
}

.form-input[type="checkbox"] {
  width: auto;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.form-row {
  display: flex;
  gap: var(--space-3);
  align-items: flex-end;
}

.form-row .form-group {
  flex: 1;
  margin-bottom: 0;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.checkbox-group label {
  font-size: var(--text-sm);
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   Status / Badge
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-xl);
  font-size: var(--text-xs);
  font-weight: 600;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.badge-success { background: rgba(76,175,132,0.15); color: var(--color-success); }
.badge-success .badge-dot { background: var(--color-success); }
.badge-warning { background: rgba(224,168,74,0.15); color: var(--color-warning); }
.badge-warning .badge-dot { background: var(--color-warning); }
.badge-danger  { background: rgba(224,92,92,0.15);  color: var(--color-danger);  }
.badge-danger  .badge-dot  { background: var(--color-danger);  }
.badge-muted   { background: rgba(136,136,168,0.12);color: var(--color-text-muted); }
.badge-muted   .badge-dot  { background: var(--color-text-muted); }
.badge-accent  { background: rgba(124,106,247,0.15);color: var(--color-accent);  }
.badge-accent  .badge-dot  { background: var(--color-accent);  }

/* --------------------------------------------------------------------------
   Alert / Notice
   -------------------------------------------------------------------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  border: 1px solid transparent;
}

.alert-warning {
  background: rgba(224,168,74,0.1);
  border-color: rgba(224,168,74,0.3);
  color: var(--color-warning);
}

.alert-danger {
  background: rgba(224,92,92,0.1);
  border-color: rgba(224,92,92,0.3);
  color: var(--color-danger);
}

.alert-info {
  background: rgba(124,106,247,0.1);
  border-color: rgba(124,106,247,0.3);
  color: var(--color-accent-h);
}

.alert-success {
  background: rgba(76,175,132,0.1);
  border-color: rgba(76,175,132,0.3);
  color: var(--color-success);
}

/* --------------------------------------------------------------------------
   Stat / Debug readout
   -------------------------------------------------------------------------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-2);
}

.stat-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent-h);
}

/* --------------------------------------------------------------------------
   Model View
   -------------------------------------------------------------------------- */
.model-view {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  height: 100%;
  overflow: hidden;
}

.model-canvas-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 0;
}

.canvas-frame {
  flex: 1;
  background: #0b0b12;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.canvas-frame canvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
  border-radius: var(--radius-md);
}

.model-sidebar {
  width: 260px;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  overflow-y: auto;
  flex-shrink: 0;
}

/* Calibration steps */
.calibration-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.calibration-step {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
}

.calibration-step.done {
  border-color: var(--color-success);
  color: var(--color-success);
}

.calibration-step.active {
  border-color: var(--color-accent);
  color: var(--color-accent-h);
}

.step-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.calibration-step.done .step-num {
  background: var(--color-success);
  color: #fff;
}

.calibration-step.active .step-num {
  background: var(--color-accent);
  color: #fff;
}

/* Mode toggle */
.mode-toggle-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Cam View
   -------------------------------------------------------------------------- */
.cam-view {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  height: 100%;
  overflow: hidden;
}

.cam-video-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 0;
}

.cam-video-container {
  flex: 1;
  background: #000;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cam-video-container video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: fill;   /* stretch to fill – keeps landmarks perfectly aligned with overlay canvas */
}

.cam-overlay-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.cam-sidebar {
  width: 260px;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  overflow-y: auto;
  flex-shrink: 0;
}

.cam-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  height: 100%;
}

.cam-placeholder svg {
  width: 48px;
  height: 48px;
  opacity: 0.4;
}

/* --------------------------------------------------------------------------
   Editor View
   -------------------------------------------------------------------------- */
.editor-view {
  display: flex;
  height: 100%;
  overflow: hidden;
}

.editor-left {
  width: 300px;
  background: var(--color-panel);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
}

.editor-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.editor-right {
  width: 280px;
  background: var(--color-panel);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
}

.editor-section {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.editor-section:last-child {
  border-bottom: none;
}

.editor-canvas-wrap {
  flex: 1;
  background: #0b0b12;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.editor-canvas-wrap canvas {
  display: block;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  cursor: crosshair;
}

.editor-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.layer-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.layer-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  font-size: var(--text-sm);
}

.layer-item:hover {
  background: var(--color-panel-alt);
}

.layer-item.selected {
  background: rgba(124,106,247,0.15);
  border-color: var(--color-accent);
  color: var(--color-accent-h);
}

.layer-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  flex-shrink: 0;
  font-weight: 700;
  color: var(--color-text-muted);
}

.layer-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.layer-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Upload slot */
.upload-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.upload-slot:hover,
.upload-slot.drag-over {
  border-color: var(--color-accent);
  background: rgba(124,106,247,0.06);
  color: var(--color-accent-h);
}

.upload-slot.has-image {
  border-style: solid;
  border-color: var(--color-success);
  color: var(--color-success);
}

.upload-slot img {
  max-width: 80px;
  max-height: 80px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

/* Range with value display */
.range-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.range-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.range-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.range-value {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent-h);
}

/* Tab strip inside panels */
.tab-strip {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-3);
  gap: var(--space-1);
}

.tab-btn {
  padding: var(--space-2) var(--space-3);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  font-family: var(--font-ui);
  margin-bottom: -1px;
}

.tab-btn:hover {
  color: var(--color-text);
}

.tab-btn.active {
  color: var(--color-accent-h);
  border-bottom-color: var(--color-accent);
}

.tab-panel {
  display: none;
}

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

/* --------------------------------------------------------------------------
   Scrollbar
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Utility
   -------------------------------------------------------------------------- */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }
.w-full { width: 100%; }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent-h); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.monospace { font-family: var(--font-mono); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }

/* Divider */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-3) 0;
}

/* Tooltip-like subtitle */
.subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* Overlay spinner */
.overlay-message {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  background: rgba(15,15,20,0.82);
  border-radius: inherit;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  z-index: 5;
}

.overlay-message.hidden {
  display: none !important;
}

/* Loading dots animation */
@keyframes blink {
  0%, 80%, 100% { opacity: 0.2; }
  40%            { opacity: 1;   }
}

.loading-dots span {
  display: inline-block;
  animation: blink 1.2s infinite both;
  font-size: 1.6em;
  line-height: 1;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

/* --------------------------------------------------------------------------
   Range of Motion Test section (Rig Tab)
   -------------------------------------------------------------------------- */
.test-section {
  background: rgba(224, 168, 74, 0.06);
  border: 1px solid rgba(224, 168, 74, 0.25);
  border-left: 3px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin-top: var(--space-2);
}

.test-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.test-section-title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--color-warning);
}

.test-slider-controls {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.test-slider-controls .form-input {
  flex: 1;
  min-width: 0;
}