:root {
  --bg-dark: #0a0d14;
  --bg-canvas: #0e121d;
  --panel-bg: rgba(18, 24, 38, 0.75);
  --panel-border: rgba(255, 255, 255, 0.1);
  --panel-backdrop: blur(16px);
  --text-main: #f0f4fc;
  --text-muted: #8a99b5;
  --accent-cyan: #00e5ff;
  --accent-blue: #29b6f6;
  --accent-purple: #7c4dff;
  --accent-green: #00e676;
  --accent-amber: #ff9100;
  --accent-red: #ff1744;
  --shadow-glow: 0 0 20px rgba(0, 229, 255, 0.2);
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-code: 'Fira Code', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-main);
  -webkit-font-smoothing: antialiased;
}

/* App Header Bar */
.app-header {
  height: 56px;
  background: rgba(10, 13, 20, 0.9);
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  position: relative;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(124, 77, 255, 0.2));
  border: 1px solid rgba(0, 229, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.app-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-main);
}

.app-subtitle {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

/* Telemetry Bar */
.telemetry-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 6px 16px;
}

.telem-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.telem-label {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.8px;
  color: var(--text-muted);
}

.telem-val {
  font-family: var(--font-code);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
}

.telem-val.accent {
  color: var(--accent-cyan);
}

.telem-val.highlight {
  color: var(--accent-amber);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #00b0ff, #00e5ff);
  color: #000;
  border: none;
  box-shadow: 0 2px 10px rgba(0, 229, 255, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.5);
}

.pulse-btn {
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(0, 229, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 255, 0); }
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--panel-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-success {
  background: var(--accent-green);
  color: #000;
}

.btn-danger {
  background: rgba(255, 23, 68, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(255, 23, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(255, 23, 68, 0.3);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 11px;
}

.btn-full {
  width: 100%;
}

.btn-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

/* Viewport Container */
.viewport-container {
  width: 100%;
  height: calc(100vh - 56px);
  position: relative;
  background: var(--bg-canvas);
  overflow: hidden;
}

#main-canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

/* Status Banner */
.status-banner {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--panel-backdrop);
  padding: 8px 18px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  z-index: 5;
  pointer-events: none;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-indicator.active {
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
}

.status-indicator.inactive {
  background: var(--accent-amber);
  box-shadow: 0 0 10px var(--accent-amber);
}

/* Floating Controls (Left Panel) */
.floating-panel {
  position: absolute;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--panel-backdrop);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  z-index: 5;
}

.left-panel {
  top: 14px;
  left: 14px;
  width: 290px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: calc(100vh - 84px);
  overflow-y: auto;
}

.left-panel::-webkit-scrollbar {
  width: 4px;
}
.left-panel::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
}

.panel-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.panel-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent-cyan);
}

/* Unit & Mode Selectors */
.btn-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  background: rgba(0, 0, 0, 0.2);
  padding: 4px;
  border-radius: 6px;
}

.btn-toggle {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 4px;
  font-size: 11px;
  font-weight: 500;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-toggle.active {
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
}

/* DPI Controls */
.dpi-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-cyan);
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  cursor: pointer;
}

.dpi-input-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

input[type="number"], .select-input {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--panel-border);
  color: var(--text-main);
  padding: 6px 10px;
  font-family: var(--font-code);
  font-size: 12px;
  border-radius: 6px;
  outline: none;
  width: 100%;
}

input[type="number"]:focus, .select-input:focus {
  border-color: var(--accent-cyan);
}

/* Tool Rows */
.tool-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.row-label {
  font-size: 11px;
  color: var(--text-muted);
}

.slider-val {
  font-family: var(--font-code);
  font-size: 11px;
  color: var(--text-main);
  min-width: 32px;
  text-align: right;
}

/* Color Picker */
.color-picker-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  cursor: pointer;
  background: transparent;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: 1px solid var(--panel-border);
  border-radius: 50%;
}

.color-swatch {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.color-swatch:hover {
  transform: scale(1.2);
}

/* Toggle Switch */
.toggle-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.toggle-switch input {
  display: none;
}

.switch-slider {
  width: 34px;
  height: 18px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  position: relative;
  transition: background 0.2s ease;
}

.switch-slider::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 2px;
  top: 2px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform 0.2s ease, background 0.2s ease;
}

.toggle-switch input:checked + .switch-slider {
  background: rgba(0, 229, 255, 0.2);
}

.toggle-switch input:checked + .switch-slider::before {
  transform: translateX(16px);
  background: var(--accent-cyan);
}

.toggle-label {
  font-size: 11px;
  color: var(--text-main);
}

/* Scale Indicator (Bottom Left) */
.scale-indicator {
  position: absolute;
  bottom: 20px;
  left: 320px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--panel-backdrop);
  padding: 8px 12px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 5;
}

.scale-bar {
  height: 4px;
  background: var(--accent-cyan);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-cyan);
  transition: width 0.2s ease;
}

.scale-text {
  font-family: var(--font-code);
  font-size: 10px;
  color: var(--text-muted);
  text-align: center;
}

/* View Controls (Bottom Right) */
.view-controls {
  bottom: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
}

.btn-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--panel-border);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-icon.text-btn {
  font-family: var(--font-code);
  font-size: 10px;
  width: auto;
  padding: 0 8px;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 480px;
  max-width: 90vw;
  background: #111622;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.modal-header {
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-cyan);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.wizard-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step-card {
  display: flex;
  gap: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 12px;
}

.step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.step-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
}

.dist-options {
  display: flex;
  gap: 16px;
  margin-top: 4px;
}

.calib-live-counter {
  font-size: 12px;
  margin-top: 6px;
}

.highlight-code {
  font-family: var(--font-code);
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 14px;
}

.calib-result {
  background: rgba(0, 230, 118, 0.1);
  border: 1px solid rgba(0, 230, 118, 0.3);
  border-radius: 8px;
  padding: 14px;
}

.result-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-label {
  font-size: 12px;
  color: var(--text-main);
}

.result-val {
  font-family: var(--font-code);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-green);
}

.modal-footer {
  padding: 16px 20px;
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.export-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}