/* ==========================================================================
   DELD Virtual Trainer Kit - UI, Grid Canvas & Floating Toolbars
   Faithfully styled after DeldSim
   ========================================================================== */

:root {
  --bg-canvas: #edf3f8;
  --grid-line-major: rgba(186, 210, 230, 0.7);
  --grid-line-minor: rgba(215, 230, 242, 0.4);
  --trainer-blue: #0ca5d7;
  --trainer-blue-dark: #0092c4;
  --text-dark: #0f172a;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-canvas);
  color: var(--text-dark);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* Light Navigation Bar */
.app-header {
  height: 52px;
  background-color: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  z-index: 40;
}

/* Workspace Canvas with Engineering Grid Background */
#canvasContainer {
  background-color: #edf3f8;
  background-image: 
    linear-gradient(var(--grid-line-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-major) 1px, transparent 1px),
    linear-gradient(var(--grid-line-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-minor) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 16px 16px, 16px 16px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
}

/* DeldSim Floating Left Toolbar (White rounded pill) */
.floating-toolbar-container {
  position: absolute;
  left: 18px;
  top: 76px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 30;
}

.floating-pill {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 6px 4px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.tool-btn {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tool-btn:hover {
  color: #0284c7;
  background-color: #f0f9ff;
}

.tool-btn.active {
  color: #0284c7;
  background-color: #e0f2fe;
  border-color: #bae6fd;
}

.tool-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Bottom Right Zoom Pill */
.zoom-pill {
  position: absolute;
  right: 20px;
  bottom: 20px;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 3px 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  font-size: 12px;
  font-weight: 600;
  color: #334155;
  z-index: 30;
}

.zoom-btn-light {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: #64748b;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.15s;
}

.zoom-btn-light:hover {
  background-color: #f1f5f9;
  color: #0f172a;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-window {
  background-color: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  color: #0f172a;
}

/* IC Category Filter Tabs */
.ic-category-tab {
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 8px;
  background-color: #f1f5f9;
  border: 1px solid #e2e8f0;
  color: #64748b;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ic-category-tab:hover {
  color: #0f172a;
  background-color: #e2e8f0;
}

.ic-category-tab.active {
  color: #0284c7;
  background-color: #e0f2fe;
  border-color: #7dd3fc;
}

/* Badge Types */
.badge-input {
  background-color: #eff6ff;
  color: #2563eb;
  border: 1px solid #bfdbfe;
}

.badge-output {
  background-color: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
}

.badge-vcc {
  background-color: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

.badge-gnd {
  background-color: #f8fafc;
  color: #475569;
  border: 1px solid #cbd5e1;
}

.badge-nc {
  background-color: #f1f5f9;
  color: #94a3b8;
  border: 1px solid #e2e8f0;
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  z-index: 999;
}

.toast {
  pointer-events: auto;
  transition: all 0.25s ease;
}

.toast-info {
  background-color: #ffffff;
  color: #0f172a;
  border: 1px solid #cbd5e1;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.toast-success {
  background-color: #f0fdf4;
  color: #15803d;
  border: 1px solid #86efac;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.toast-warning {
  background-color: #fffbeb;
  color: #b45309;
  border: 1px solid #fde68a;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.toast-error {
  background-color: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fca5a5;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}