:root {
  --primary-bg: #f6f8fc;
  --secondary-bg: #ffffff;
  --primary-text: #1a1f36;
  --secondary-text: #4a5578;
  --accent-color: #3b82f6;
  --danger-color: #ef4444;
  --success-color: #22c55e;
  --warning-color: #f59e0b;
  --border-color: #e5e7eb;
  --gauge-bg: #ffffff;
  --gauge-track: #e5e7eb;
  --gauge-accent: #3b82f6;
  --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --hover-bg: #f8fafc;
}

[data-theme="dark"] {
  --primary-bg: #0f172a;
  --secondary-bg: #1e293b;
  --primary-text: #f8fafc;
  --secondary-text: #94a3b8;
  --accent-color: #60a5fa;
  --danger-color: #f87171;
  --success-color: #4ade80;
  --warning-color: #fbbf24;
  --border-color: #334155;
  --gauge-bg: #1e293b;
  --gauge-track: #334155;
  --gauge-accent: #60a5fa;
  --card-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
  --hover-bg: #2d3a4f;
  --bs-secondary-color: rgba(238, 240, 242, 0.5);

}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--primary-bg);
  color: var(--primary-text);
  transition: all 0.3s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

nav {
  background-color: var(--secondary-bg);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 4px var(--card-shadow);
}

.navbar-nav {
  flex-direction: row !important;
}

.navbar-brand {
  font-size: 1.25rem;
  color: var(--primary-text) !important;
}

.nav-icon-btn {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gauge-bg);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
  color: var(--primary-text);
}

.nav-icon-btn:hover {
  background: var(--hover-bg);
  transform: translateY(-1px);
}

.nav-icon-btn i {
  font-size: 1.25rem;
}

.dropdown-menu {
  background-color: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.5rem 0;
  box-shadow: var(--card-shadow);
}

.dropdown-item {
  color: var(--primary-text);
  padding: 0.5rem 1rem;
}

.dropdown-item:hover {
  background-color: var(--hover-bg);
  color: var(--primary-text);
}

.offcanvas {
  background-color: var(--secondary-bg);
}

.offcanvas-header {
  border-bottom: 1px solid var(--border-color);
}

.offcanvas-title {
  color: var(--primary-text);
}

.list-group-item {
  transition: all 0.2s ease;
}

.list-group-item:hover {
  transform: translateX(4px);
}

.btn-close {
  filter: var(--primary-text-filter);
}

.dashboard-card {
  margin: 2rem 0;
  transition: all 0.3s ease;
}

.dashboard-layout {
  margin: 2rem 0;
  transition: all 0.3s ease;
}

.speedometer-container {
  position: relative;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
}

.gauge-canvas {
  width: 100%;
  height: auto;
  transition: all 0.3s ease;
}

.digital-display {
  background: var(--gauge-bg);
  border-radius: 20px;
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: var(--card-shadow);
  display: none;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  margin: 1rem 0;
}

.digital-display .speed-value {
  font-size: 6rem;
  font-weight: 800;
  color: var(--accent-color);
  line-height: 1;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  font-family: 'Plus Jakarta Sans', monospace;
  display: block;
}

.digital-display .speed-unit {
  font-size: 2rem;
  color: var(--secondary-text);
  margin-left: 0.5rem;
  display: block;
}

.controls-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.toggle-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1rem 0;
  justify-content: center;
}

.toggle-switch {
  position: relative;
  width: 60px;
  height: 34px;
  cursor: pointer;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gauge-track);
  transition: .4s;
  border-radius: 34px;
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 3px;
  background-color: var(--secondary-bg);
  transition: .4s;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}

input:checked+.toggle-slider {
  background-color: var(--accent-color);
}

input:checked+.toggle-slider:before {
  transform: translateX(26px);
}

.unit-selector {
  display: flex;
  gap: 0.5rem;
  margin: 1.5rem 0;
  justify-content: center;
}

.unit-btn {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  color: var(--secondary-text);
  padding: 0.75rem 1.5rem;
  border-radius: 12px;
  font-weight: 600;
  transition: all 0.3s ease;
  cursor: pointer;
  min-width: 80px;
}

.unit-btn:hover {
  background: var(--hover-bg);
  transform: translateY(-1px);
}

.unit-btn.active {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.control-buttons {
  display: flex;
  gap: 1rem;
  margin: 1.5rem 0;
  justify-content: center;
}

.ctrl-btn {
  flex: 1;
  max-width: 200px;
  padding: 1rem;
  border-radius: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.start-btn {
  background: var(--success-color);
  color: white;
}

.stop-btn {
  background: var(--danger-color);
  color: white;
}

.reset-btn {
  background: var(--secondary-bg);
  color: var(--secondary-text);
  border: 1px solid var(--border-color);
}

.ctrl-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.stat-card {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.stat-label {
  color: var(--secondary-text);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-text);
}

.footer {
  margin-top: auto;
  padding: 2rem 0;
  text-align: center;
  color: var(--secondary-text);
  border-top: 1px solid var(--border-color);
  background-color: var(--secondary-bg);
}

.modal-content {
  background: var(--secondary-bg);
  border-radius: 16px;
  border: 1px solid var(--border-color);
}

.modal-header {
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem;
}

.modal-title {
  color: var(--primary-text);
  font-weight: 600;
}

.modal-body {
  padding: 1.5rem;
  color: var(--secondary-text);
}

.modal-footer {
  border-top: 1px solid var(--border-color);
  padding: 1.5rem;
}

@media (max-width: 768px) {
  .navbar-brand {
    font-size: 1.1rem;
  }

  .responsive-h1 {
    font-size: 1.12rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .digital-display .speed-value {
    font-size: 6rem;
  }

  .control-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .ctrl-btn {
    max-width: none;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .unit-selector {
    flex-wrap: wrap;
  }

  .unit-btn {
    flex: 1;
  }

  .digital-display .speed-value {
    font-size: 6rem;
  }
}

@media (max-width: 920px) and (orientation: landscape) {
  .navbar {
    padding: 0.5rem 0;
  }

  .navbar-brand {
    font-size: 1.25rem;
  }

  .dashboard-layout {
    display: grid;
    grid-template-columns: 45% 55%;
    gap: 1rem;
    padding: 0.5rem;
    height: calc(100vh - 60px);
    overflow: hidden;
  }

  .speedometer-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .speedometer-container {
    max-width: none;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .gauge-canvas {
    max-height: 90vh;
    width: auto;
  }

  .digital-display {
    padding: 1.5rem 1rem;
    margin: 0;
  }

  .controls-section {
    margin-top: 0;
    padding: 0.5rem;
    border-top: none;
    border-left: 1px solid var(--border-color);
    height: 100%;
    overflow-y: auto;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    margin-top: 1rem;
  }

  .stat-card {
    padding: 1rem;
  }

  .control-buttons {
    flex-direction: row;
    margin: 1rem 0;
  }

  .ctrl-btn {
    padding: 0.75rem;
  }

  .toggle-container {
    margin: 0.5rem 0;
  }

  .unit-selector {
    margin: 1rem 0;
  }

  .unit-btn {
    padding: 0.5rem 1rem;
  }

  .footer {
    display: none;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

  .stat-icon {
    width: 32px;
    height: 32px;
    font-size: 1rem;
  }
}

@media (max-height: 400px) and (orientation: landscape) {
  .navbar {
    padding: 0.25rem 0;
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .stat-card {
    padding: 0.75rem;
  }

  .control-buttons {
    gap: 0.5rem;
  }

  .ctrl-btn {
    padding: 0.5rem;
  }
}