:root {
  --cyan: #00f3ff;
  --magenta: #ff0055;
  --green: #00ff66;
  --bg: #030712;
  --panel-bg: rgba(8, 14, 28, 0.94);
  --border: rgba(0, 243, 255, 0.25);
  --dim: #64748b;
}

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

html, body {
  background-color: var(--bg);
  color: #f1f5f9;
  font-family: 'JetBrains Mono', 'Courier New', Courier, monospace;
  overflow: hidden;
  height: 100%;
  width: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

/* Topbar */
.cad-topbar {
  height: 48px;
  flex: 0 0 48px;
  background: rgba(3, 7, 18, 0.98);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 20;
}

.cad-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--cyan);
  text-decoration: none;
  font-weight: bold;
  font-size: 13px;
  letter-spacing: 1px;
}

.cad-brand-dot {
  width: 8px;
  height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.cad-nav {
  display: flex;
  gap: 10px;
}

.nav-btn {
  color: #94a3b8;
  text-decoration: none;
  font-size: 11px;
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  transition: all 0.2s;
}

.nav-btn:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(0, 243, 255, 0.08);
}

/* Main Workspace */
.cad-workspace {
  flex: 1 1 auto;
  display: flex;
  position: relative;
  overflow: hidden;
  min-height: 0;
  min-width: 0;
}

/* WebGL Viewport */
#viewport {
  flex: 1 1 auto;
  height: 100%;
  min-height: 0;
  min-width: 0;
  position: relative;
  background: radial-gradient(circle at center, #0a1733 0%, #030712 100%);
}

#viewport canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Floating UI Dock */
#cad-sidebar {
  width: 350px;
  flex: 0 0 350px;
  background: var(--panel-bg);
  border-left: 1px solid var(--border);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  z-index: 10;
  box-shadow: -5px 0 25px rgba(0, 0, 0, 0.5);
  min-height: 0;
}

.panel-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--cyan);
  font-size: 12px;
  font-weight: bold;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.badge {
  background: rgba(0, 243, 255, 0.15);
  color: var(--cyan);
  border: 1px solid var(--cyan);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 10px;
}

.panel-body {
  padding: 16px;
  flex: 1 1 auto;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: #94a3b8;
  text-transform: uppercase;
}

.control-val {
  color: var(--cyan);
  font-weight: bold;
}

.control-group input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
  background: #080d1a;
  cursor: pointer;
}

.control-group select {
  width: 100%;
  background: #080d1a;
  border: 1px solid var(--border);
  color: var(--cyan);
  padding: 7px 10px;
  font-family: inherit;
  font-size: 11px;
  border-radius: 4px;
  outline: none;
}

.btn-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.btn-toggle {
  background: #080d1a;
  border: 1px solid var(--border);
  color: #cbd5e1;
  font-family: inherit;
  font-size: 11px;
  padding: 7px 4px;
  border-radius: 4px;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
}

.btn-toggle.active {
  background: var(--cyan);
  color: #030712;
  font-weight: bold;
  border-color: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 243, 255, 0.4);
}

.action-btn {
  width: 100%;
  padding: 11px;
  background: var(--cyan);
  border: none;
  color: #030712;
  font-family: inherit;
  font-size: 11px;
  font-weight: bold;
  letter-spacing: 1px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
  box-shadow: 0 0 15px rgba(0, 243, 255, 0.3);
}

.action-btn:hover {
  background: #70f7ff;
  box-shadow: 0 0 22px rgba(0, 243, 255, 0.6);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--cyan);
  box-shadow: none;
  padding: 8px;
  font-size: 10px;
}

.btn-secondary:hover {
  background: rgba(0, 243, 255, 0.1);
  border-color: var(--cyan);
}

/* Live Telemetry Overlay */
#telemetry-hud {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: var(--panel-bg);
  border: 1px solid var(--cyan);
  padding: 12px 18px;
  font-size: 11px;
  line-height: 1.5;
  border-radius: 6px;
  box-shadow: 0 0 20px rgba(0, 243, 255, 0.2);
  backdrop-filter: blur(12px);
  pointer-events: none;
  z-index: 5;
}

.hud-title {
  color: var(--cyan);
  font-weight: bold;
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.hud-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.hud-label { color: #94a3b8; }
.hud-val { color: #fff; font-weight: bold; }

/* Viewport Helper Overlay */
.viewport-tools {
  position: absolute;
  top: 16px;
  left: 16px;
  display: flex;
  gap: 8px;
  z-index: 5;
  flex-wrap: wrap;
}

.v-tool-btn {
  background: rgba(8, 14, 28, 0.88);
  border: 1px solid var(--border);
  color: #94a3b8;
  font-family: inherit;
  font-size: 10px;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: all 0.2s;
}

.v-tool-btn:hover, .v-tool-btn.active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(0, 243, 255, 0.15);
}

/* Toast Notification */
#cad-toast {
  position: absolute;
  top: 20px;
  right: 370px;
  background: rgba(3, 7, 18, 0.95);
  border: 1px solid var(--green);
  color: var(--green);
  padding: 8px 14px;
  font-size: 11px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  transform: translateY(-8px);
  z-index: 30;
  box-shadow: 0 0 15px rgba(0, 255, 102, 0.25);
}

#cad-toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 800px) {
  .cad-workspace { flex-direction: column; }
  #viewport { height: 50vh; flex: 0 0 50vh; }
  #cad-sidebar { width: 100%; flex: 1 1 auto; }
  #cad-toast { right: 20px; }
}