/* CSS Reset and Base Styles */
:root {
  /* Color Palette */
  --primary-color: #1a73e8;
  --primary-hover: #1557b0;
  --secondary-color: #5f6368;
  --success-color: #1e8e3e;
  --warning-color: #f9ab00;
  --danger-color: #d93025;
  --background-color: #ffffff;
  --surface-color: #f8f9fa;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --border-color: #dadce0;
  
  /* Dark Theme Colors */
  --dark-background: #202124;
  --dark-surface: #292a2d;
  --dark-text-primary: #e8eaed;
  --dark-text-secondary: #9aa0a6;
  --dark-border: #3c4043;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(60,64,67,0.3), 0 1px 3px 1px rgba(60,64,67,0.15);
  --shadow-md: 0 1px 3px 0 rgba(60,64,67,0.3), 0 4px 8px 3px rgba(60,64,67,0.15);
  --shadow-lg: 0 2px 3px 0 rgba(60,64,67,0.3), 0 6px 10px 4px rgba(60,64,67,0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
}

/* Dark Theme */
[data-theme="dark"] {
  --background-color: var(--dark-background);
  --surface-color: var(--dark-surface);
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --border-color: var(--dark-border);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.app-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
}

/* Status Indicator */
.status-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--background-color);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--secondary-color);
  transition: background-color var(--transition-normal);
}

.status-indicator.active .status-dot {
  background-color: var(--success-color);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.status-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Main Content */
.app-main {
  flex: 1;
  padding: var(--spacing-lg);
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

/* Meter Section */
.meter-section {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.meter-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
}

#soundMeter {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
}

.meter-info {
  display: flex;
  justify-content: space-around;
  width: 100%;
  max-width: 400px;
}

.current-level {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-xs);
}

.level-value {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary-color);
}

.level-unit {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.peak-level {
  display: flex;
  align-items: center;
  font-size: 1rem;
  color: var(--text-secondary);
}

/* Control Section */
.control-section {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.3);
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: white;
  color: var(--primary-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--surface-color);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
  width: 100%;
  max-width: 300px;
  margin: 0 auto var(--spacing-xl);
}

.btn-icon {
  font-size: 1.5rem;
}

#toggleMonitoring.active {
  background-color: var(--danger-color);
}

#toggleMonitoring.active:hover {
  background-color: #b71c1c;
}

/* Threshold Control */
.threshold-control {
  max-width: 500px;
  margin: 0 auto;
}

.threshold-control label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.threshold-input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

#thresholdSlider {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(to right, 
    var(--success-color) 0%, 
    var(--warning-color) 50%, 
    var(--danger-color) 100%);
  border-radius: var(--radius-sm);
  outline: none;
}

#thresholdSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: white;
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

#thresholdSlider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: white;
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

#thresholdNumber {
  width: 80px;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  text-align: center;
}

.threshold-unit {
  color: var(--text-secondary);
}

.threshold-presets {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.preset-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
}

.preset-btn:hover {
  background-color: var(--surface-color);
  border-color: var(--primary-color);
}

/* Settings Section */
.settings-section {
  background-color: var(--surface-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.settings-section h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.settings-group {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.settings-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.settings-group h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

/* Toggle Switch */
.toggle-switch {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  cursor: pointer;
  user-select: none;
  margin-bottom: var(--spacing-md);
}

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

.toggle-slider {
  position: relative;
  width: 48px;
  height: 24px;
  background-color: var(--border-color);
  border-radius: 24px;
  transition: background-color var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast);
}

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

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(24px);
}

.toggle-label {
  font-size: 1rem;
  color: var(--text-primary);
}

/* Form Elements */
.setting-option {
  margin-bottom: var(--spacing-md);
}

.setting-option label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

select,
input[type="url"],
input[type="number"] {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background-color: var(--background-color);
  color: var(--text-primary);
  transition: border-color var(--transition-fast);
}

select:focus,
input[type="url"]:focus,
input[type="number"]:focus {
  outline: none;
  border-color: var(--primary-color);
}

.input-group {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

.input-group input {
  flex: 1;
}

.input-suffix {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.help-text {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

/* Webhook Config */
.webhook-config {
  margin-top: var(--spacing-md);
}

.webhook-test-result {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  display: none;
}

.webhook-test-result.success {
  display: block;
  background-color: rgba(30, 142, 62, 0.1);
  color: var(--success-color);
  border: 1px solid var(--success-color);
}

.webhook-test-result.error {
  display: block;
  background-color: rgba(217, 48, 37, 0.1);
  color: var(--danger-color);
  border: 1px solid var(--danger-color);
}

/* Profile Selector */
.profile-selector {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.profile-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1rem;
}

.profile-btn:hover {
  background-color: var(--surface-color);
}

.profile-btn.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Footer */
.app-footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.app-footer a {
  color: var(--primary-color);
  text-decoration: none;
  margin: 0 var(--spacing-sm);
}

.app-footer a:hover {
  text-decoration: underline;
}

/* Message Container */
.message-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1000;
  max-width: 400px;
}

.message {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  animation: slideIn var(--transition-normal);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.message.info {
  background-color: rgba(26, 115, 232, 0.1);
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
}

.message.success {
  background-color: rgba(30, 142, 62, 0.1);
  border: 1px solid var(--success-color);
  color: var(--success-color);
}

.message.warning {
  background-color: rgba(249, 171, 0, 0.1);
  border: 1px solid var(--warning-color);
  color: var(--warning-color);
}

.message.error {
  background-color: rgba(217, 48, 37, 0.1);
  border: 1px solid var(--danger-color);
  color: var(--danger-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .app-main {
    padding: var(--spacing-md);
  }
  
  .meter-section,
  .control-section,
  .settings-section {
    padding: var(--spacing-lg);
  }
  
  .level-value {
    font-size: 2.5rem;
  }
  
  .threshold-presets {
    justify-content: space-between;
  }
  
  .preset-btn {
    flex: 1;
    min-width: 100px;
  }
  
  .profile-selector {
    justify-content: stretch;
  }
  
  .profile-btn {
    flex: 1;
  }
  
  .message-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
    max-width: none;
  }
}

@media (max-width: 480px) {
  .app-header h1 {
    font-size: 1.25rem;
  }
  
  .meter-info {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
  }
  
  .threshold-input-group {
    flex-wrap: wrap;
  }
  
  #thresholdSlider {
    width: 100%;
  }
  
  .btn-large {
    max-width: none;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --background-color: var(--dark-background);
    --surface-color: var(--dark-surface);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --border-color: var(--dark-border);
  }
}