/* 
 * styles.css
 * Main stylesheet for SuperMorse web application 
 */

/* ================ GLOBAL STYLES ================ */
:root {
  /* Color palette */
  --primary-color: #3498db;
  --primary-dark: #2980b9;
  --secondary-color: #2ecc71;
  --secondary-dark: #27ae60;
  --danger-color: #e74c3c;
  --danger-dark: #c0392b;
  --text-color: #333;
  --text-light: #777;
  --bg-color: #f8f9fa;
  --card-bg: #fff;
  --border-color: #ddd;
  --highlight-color: #f1c40f;
  --accent-color: #9b59b6; /* Purple accent color for regional characters */
  
  /* Status colors */
  --success-color: #2ecc71;
  --error-color: #e74c3c;
  --warning-color: #f39c12;
  --info-color: #3498db;
  
  /* Font sizes */
  --font-small: 0.875rem;
  --font-normal: 1rem;
  --font-medium: 1.25rem;
  --font-large: 1.5rem;
  --font-xlarge: 2rem;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  
  /* Borders */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
}

/* Dark theme variables */
.dark-theme {
  --primary-color: #4aa3df;
  --primary-dark: #2980b9;
  --text-color: #f8f9fa;
  --text-light: #adb5bd;
  --bg-color: #1a1a1a;
  --card-bg: #2d2d2d;
  --border-color: #444;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--spacing-md);
  font-weight: 600;
  line-height: 1.3;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

ul {
  list-style: none;
}

.hidden {
  display: none !important;
}

/* ================ HEADER & FOOTER ================ */
header {
  padding: var(--spacing-md) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.logo h1 {
  font-size: var(--font-xlarge);
  margin-bottom: var(--spacing-xs);
  color: var(--primary-color);
}

.logo p {
  font-size: var(--font-small);
  color: var(--text-light);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

#userDisplayName {
  font-weight: 600;
}

footer {
  margin-top: auto;
  padding: var(--spacing-md) 0;
  text-align: center;
  font-size: var(--font-small);
  color: var(--text-light);
  border-top: 1px solid var(--border-color);
}

/* ================ BUTTONS ================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-normal);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  font-weight: 500;
}

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

.btn-small {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-small);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-medium);
}

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

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

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

.btn-danger:hover {
  background-color: var(--danger-dark);
  border-color: var(--danger-dark);
}

.btn-ptt {
  background-color: var(--danger-color);
  color: white;
  width: 100%;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  font-weight: bold;
  position: relative;
  overflow: hidden;
}

.btn-ptt:active {
  transform: scale(0.98);
  background-color: var(--danger-dark);
}

.btn-ptt::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%, -50%);
  transform-origin: 50% 50%;
}

.btn-ptt:active::before {
  animation: ripple 0.6s ease-out;
}

@keyframes ripple {
  0% {
    transform: scale(0, 0) translate(-50%, -50%);
    opacity: 0.5;
  }
  100% {
    transform: scale(20, 20) translate(-50%, -50%);
    opacity: 0;
  }
}

/* ================ LOADING STATES ================ */
.btn.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.btn.loading .button-text {
  opacity: 0;
}

.btn.loading .loading-spinner {
  display: inline-block !important;
  opacity: 1;
}

.loading-spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: inherit;
}

.form-loading {
  pointer-events: none;
  opacity: 0.7;
}

.form-loading input,
.form-loading select,
.form-loading textarea {
  background-color: #f5f5f5;
  cursor: not-allowed;
}

.form-loading .btn {
  cursor: not-allowed;
}

/* ================ FORMS ================ */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-normal);
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Read-only field styling */
.readonly-field {
  background-color: #f8f8f8;
  cursor: not-allowed;
  border-color: var(--border-color);
  color: var(--text-light);
}

/* Paddle Timing Diagram */
.paddle-timing-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.paddle-timing-diagram {
    font-family: var(--font-mono);
}

.morse-pattern-display {
    text-align: center;
    font-size: var(--font-large);
    font-weight: bold;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.timing-lines {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

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

.paddle-label {
    min-width: 120px;
    font-weight: 500;
    font-size: var(--font-small);
}

.left-paddle-line .paddle-label {
    color: #e74c3c; /* Red for left paddle */
}

.right-paddle-line .paddle-label {
    color: #27ae60; /* Green for right paddle */
}

.paddle-timing-line {
    display: flex;
    flex: 1;
    gap: 2px;
    height: 24px;
    align-items: center;
}

.timing-segment {
    height: 100%;
    border-radius: 2px;
    transition: all 0.2s ease;
}

.timing-segment.active {
    background: var(--primary-color);
    min-width: 8px;
}

.timing-segment.inactive {
    background: var(--border-color);
    min-width: 4px;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
  vertical-align: middle;
  cursor: pointer;
}

/* Make the actual checkbox larger and position it over the entire toggle
   but make it invisible - this ensures clicks anywhere on the toggle work */
.toggle-switch input {
  opacity: 0;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  margin: 0;
  z-index: 3;
  cursor: pointer;
}

/* Create slider appearance */
.toggle-switch .slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  transition: var(--transition-normal);
  border-radius: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  z-index: 1;
  pointer-events: none; /* Let clicks pass through to the checkbox */
}

/* Create the toggle circle */
.toggle-switch .slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: var(--card-bg);
  transition: var(--transition-normal);
  border-radius: 50%;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  z-index: 2;
  pointer-events: none;
}

/* Toggle is on */
.toggle-switch input:checked + .slider {
  background-color: var(--primary-color);
}

/* Move toggle circle when checked */
.toggle-switch input:checked + .slider:before {
  transform: translateX(26px);
}

/* Make toggle switch labels clickable and improve usability */
.form-group label[for="farnsworthEnabled"] {
  display: inline-block;
  margin-right: 10px;
  cursor: pointer;
}

/* Add focus styles for better keyboard accessibility */
.toggle-switch input:focus + .slider {
  box-shadow: 0 0 0 2px var(--primary-color);
}

/* Style the container for toggle switches to improve layout */
.form-group:has(.toggle-switch) {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

.form-group:has(.toggle-switch) label {
  margin-bottom: 0;
  cursor: pointer;
}

.form-group:has(.toggle-switch) p.hint {
  flex-basis: 100%;
  margin-top: var(--spacing-sm);
}

/* Add hover effect for better visual feedback */
.toggle-switch .slider:hover {
  background-color: var(--text-light);
}

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

.form-message {
  margin-top: var(--spacing-sm);
  font-size: var(--font-small);
}

.form-message.error {
  color: var(--error-color);
}

.form-message.success {
  color: var(--success-color);
}

/* Hint styles */
.hint {
  font-size: var(--font-small);
  color: var(--text-light);
  margin-top: var(--spacing-xs);
  line-height: 1.4;
}

.hint i {
  margin-right: var(--spacing-xs);
  color: var(--info-color);
}

.hint a {
  color: var(--primary-color);
  text-decoration: underline;
}

.hint a:hover {
  color: var(--primary-dark);
}

/* Permission note styles */
.permission-note {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: #fff3cd;
  border: 1px solid #ffeeba;
  border-radius: var(--border-radius-sm);
}

.permission-note .hint {
  margin-top: 0;
  color: #856404;
}

.permission-note .hint i {
  color: #856404;
}

/* ================ AUTH SECTION ================ */
.auth-section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 70vh;
  padding: var(--spacing-xl) 0;
}

.auth-container {
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-lg);
  background-color: var(--card-bg);
  border-radius: var(--border-radius-md);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.auth-tabs {
  display: flex;
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.tab {
  flex: 1;
  text-align: center;
  padding: var(--spacing-sm) 0;
  cursor: pointer;
  color: var(--text-light);
  position: relative;
}

.tab.active {
  color: var(--primary-color);
  font-weight: 600;
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.auth-form button {
  width: 100%;
  margin-top: var(--spacing-md);
}

/* ================ MAIN APP LAYOUT ================ */
.main-app {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.app-layout {
  display: flex;
  flex: 1;
  margin: var(--spacing-md) 0;
}

.sidebar {
  width: 250px;
  background-color: var(--card-bg);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  margin-right: var(--spacing-md);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
}

.sidebar nav {
  flex: 1;
  margin-bottom: var(--spacing-xl);
}

.sidebar nav ul li {
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: all var(--transition-fast);
}

.sidebar nav ul li i {
  margin-right: var(--spacing-sm);
  width: 20px;
  text-align: center;
}

.sidebar nav ul li.active {
  background-color: var(--primary-color);
  color: white;
}

.sidebar nav ul li:hover:not(.active) {
  background-color: var(--border-color);
}

.sidebar nav ul li.locked {
  color: var(--text-light);
  cursor: not-allowed;
  position: relative;
}

.lock-icon {
  margin-left: auto;
  font-size: var(--font-small);
}

.arduino-status {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.arduino-status h4 {
  margin-bottom: var(--spacing-sm);
}

.arduino-status .port-select {
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background-color: var(--card-bg);
  color: var(--text-color);
  font-size: var(--font-small);
}

.status-indicator {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-small);
}

.status-indicator i {
  margin-right: var(--spacing-xs);
}

.status-indicator.connected {
  color: var(--success-color);
}

.status-indicator.disconnected {
  color: var(--error-color);
}

.content {
  flex: 1;
  background-color: var(--card-bg);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  overflow-y: auto;
}

.content section {
  display: none;
}

.content section.active {
  display: block;
}

/* ================ TRAINING SECTION ================ */
.training-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.control-group {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--spacing-md);
  flex: 1;
}

.control-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.control-group input[type="range"] {
  width: 100%;
  margin-bottom: var(--spacing-xs);
}

.training-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.learning-panel {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.current-lesson {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-lg);
  text-align: center;
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.current-lesson h3 {
  margin-bottom: var(--spacing-md);
}

.current-lesson .current-character {
  font-size: 4rem;
  font-weight: bold;
  margin: var(--spacing-md) 0;
}

.current-lesson .character-morse {
  font-family: monospace;
  font-size: var(--font-large);
  margin-bottom: var(--spacing-md);
  letter-spacing: 2px;
}

.current-character {
  flex: 1;
  text-align: center;
}

.character-display {
  font-size: 5rem;
  font-weight: bold;
  margin: var(--spacing-md) 0;
}

.morse-pattern {
  font-size: var(--font-large);
  font-family: monospace;
  letter-spacing: 2px;
}

.training-controls {
  flex: 1;
  padding-left: var(--spacing-lg);
}

.training-progress {
  margin-top: var(--spacing-md);
}

.progress-bar {
  height: 10px;
  background-color: var(--border-color);
  border-radius: 5px;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
}

.progress-indicator {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: 5px;
  transition: width var(--transition-normal);
}

.keyboard-input {
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.keyboard-input .morse-display {
  font-family: monospace;
  font-size: var(--font-large);
  min-height: 40px;
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm);
  background-color: var(--card-bg);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
}

.keyboard-input .text-display {
  font-size: var(--font-medium);
  min-height: 40px;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background-color: var(--card-bg);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
}

.keyboard-input .input-controls {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

.morse-keyboard {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.morse-keyboard .key-row {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.morse-keyboard .morse-key {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 80px;
  height: 60px;
  background-color: var(--primary-color);
  color: white;
  border-radius: var(--border-radius-md);
  font-size: var(--font-large);
  font-weight: bold;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.morse-keyboard .morse-key:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
}

.morse-keyboard .morse-key:active {
  transform: translateY(0);
}

.morse-keyboard .space-key {
  min-width: 180px;
  background-color: var(--secondary-color);
}

.morse-keyboard .space-key:hover {
  background-color: var(--secondary-dark);
}

.practice-area {
  margin-bottom: var(--spacing-lg);
}

.practice-display {
  padding: var(--spacing-lg);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  min-height: 150px;
}

.challenge-text {
  font-size: var(--font-large);
  margin-bottom: var(--spacing-md);
  font-family: monospace;
  letter-spacing: 2px;
}

.user-input {
  font-size: var(--font-large);
  font-family: monospace;
  letter-spacing: 2px;
  min-height: 2.5rem;
}

.user-input .correct {
  color: var(--success-color);
}

.user-input .incorrect {
  color: var(--error-color);
}

.tone-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.tone-controls label {
  display: block;
  margin-bottom: var(--spacing-xs);
}

.tone-controls input[type="range"] {
  width: 200px;
}

.lesson-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.stat-item {
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  text-align: center;
}

.stat-item h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--text-light);
}

.stat-item div {
  font-size: var(--font-large);
  font-weight: bold;
}

/* ================ PROGRESS SECTION ================ */
.progress-overview {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  gap: 20px;
  margin-bottom: var(--spacing-lg);
}

.mastery-stats, .regional-mastery-stats {
  text-align: center;
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.progress-circle, .regional-progress-circle {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  position: relative;
}

.progress-circle {
  background: conic-gradient(var(--primary-color) 0%, var(--border-color) 0%);
}

.regional-progress-circle {
  background: conic-gradient(var(--accent-color) 0%, var(--border-color) 0%);
}

.progress-circle::before, .regional-progress-circle::before {
  content: '';
  position: absolute;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background-color: var(--card-bg);
}

.progress-circle-inner {
  position: relative;
  font-size: var(--font-xlarge);
  font-weight: bold;
  z-index: 1;
}

.mastery-label {
  font-size: var(--font-small);
  color: var(--text-light);
  margin-top: var(--spacing-xs);
}

.learned-characters {
  flex: 2;
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.char-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: var(--spacing-sm);
}

.char-grid span {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-weight: bold;
}

.time-stats {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.stats-grid .stat-card {
  background-color: var(--card-bg);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  display: flex;
  flex-direction: column;
}

.stat-card .char {
  font-size: var(--font-large);
  font-weight: bold;
  margin-bottom: var(--spacing-sm);
}

.stat-card .time {
  font-size: var(--font-small);
  color: var(--text-light);
}

.next-steps {
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.char-preview {
  display: flex;
  gap: var(--spacing-md);
}

.char-preview .preview-char {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: var(--card-bg);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  min-width: 80px;
}

.preview-char .char {
  font-size: var(--font-large);
  font-weight: bold;
  margin-bottom: var(--spacing-xs);
}

.preview-char .morse {
  font-family: monospace;
  color: var(--text-light);
}

/* ================ SETTINGS SECTION ================ */
.settings-group {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.settings-group h3 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}

#saveSettingsBtn {
  margin-top: var(--spacing-md);
}

.locked-feature {
  padding: var(--spacing-md);
  background-color: rgba(0,0,0,0.03);
  border-radius: var(--border-radius-md);
  text-align: center;
}

.locked-feature i {
  margin-right: var(--spacing-xs);
  color: var(--text-light);
}

/* ================ IAMBIC TRAINER SECTION ================ */
.iambic-explanation {
  margin-bottom: var(--spacing-lg);
  background-color: var(--bg-color);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  border-left: 4px solid var(--primary-color);
}

.difficulty-selection {
  margin-bottom: var(--spacing-lg);
}

.difficulty-buttons {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.difficulty-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.character-description {
  font-size: var(--font-small);
  color: var(--text-light);
  margin-top: var(--spacing-sm);
}

.paddle-indicators {
  display: flex;
  justify-content: space-between;
  margin: var(--spacing-lg) 0;
  gap: var(--spacing-md);
}

.paddle-indicator {
  flex: 1;
  height: 50px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-color: var(--card-bg);
}

.paddle-indicator.active {
  background-color: var(--primary-color);
  color: white;
  box-shadow: 0 0 10px rgba(0, 120, 255, 0.5);
}

.paddle-label {
  font-size: var(--font-small);
  font-weight: bold;
}

.paddle-sequence {
  margin: var(--spacing-lg) 0;
}

.sequence-display {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  min-height: 40px;
  background-color: var(--bg-color);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-md);
}

.paddle-press {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  font-weight: bold;
}

.left-paddle {
  background-color: #ffaa00;
  color: black;
}

.right-paddle {
  background-color: #00aaff;
  color: white;
}

.both-paddles {
  background-color: #8800ff;
  color: white;
}

.paddle-timing {
  display: inline-block;
  font-size: var(--font-small);
  color: var(--text-light);
  margin: 0 var(--spacing-xs);
}

.technique-comparison {
  margin: var(--spacing-lg) 0;
}

.techniques {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-sm);
}

.technique-display {
  flex: 1;
  background-color: var(--bg-color);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
}

.technique-title {
  font-weight: bold;
  margin-bottom: var(--spacing-sm);
}

.animation-container {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  min-height: 40px;
}

.paddle-press.animate {
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

.feedback {
  margin: var(--spacing-lg) 0;
}

.feedback-text {
  background-color: var(--bg-color);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  border-left: 4px solid var(--info-color);
  min-height: 30px;
}

.efficiency-stats {
  margin-top: var(--spacing-lg);
}

.efficiency-meter {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.progress-bar-container {
  flex: 1;
  height: 10px;
  background-color: var(--border-color);
  border-radius: 5px;
  overflow: hidden;
}

.efficiency-bar {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: 5px;
  transition: width var(--transition-normal);
}

.efficiency-percent {
  font-weight: bold;
  min-width: 50px;
  text-align: right;
}

.stats-row {
  display: flex;
  gap: var(--spacing-lg);
}

/* Styles for disabled content that is visible but non-interactive */
.disabled-content {
  position: relative;
  opacity: 0.9; /* Increased from 0.7 for better visibility */
  pointer-events: none;
  filter: grayscale(15%); /* Reduced from 30% for better visibility */
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-color);
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
  border: 1px dashed var(--border-color);
}

.disabled-content::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.03); /* Reduced from 0.05 */
  border-radius: var(--border-radius-md);
  z-index: 1;
}

.disabled-content > * {
  position: relative;
  z-index: 2; /* Changed from 0 to be above the overlay */
}

.requirements-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 3; /* Increased from 2 */
  background-color: rgba(255, 255, 255, 0.8); /* Reduced from 0.9 for better visibility */
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  max-height: 100px; /* Limit height so content below is visible */
  overflow: auto;
}

.requirements-overlay i {
  font-size: 1.2rem;
  color: var(--warning-color);
  margin-right: var(--spacing-xs);
}

/* ================ LEADERBOARD SECTION ================ */
.section-description {
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
}

.leaderboard-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-sm);
}

.last-updated {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-small);
  color: var(--text-light);
}

.last-updated button {
  margin-left: var(--spacing-sm);
}

.leaderboard-container {
  background-color: var(--card-bg);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  position: relative;
  min-height: 400px;
}

.loading-spinner {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
  color: var(--text-light);
  font-size: var(--font-medium);
}

.loading-spinner i {
  margin-right: var(--spacing-sm);
  font-size: var(--font-large);
  color: var(--primary-color);
}

.error-message {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-xl);
  color: var(--error-color);
  text-align: center;
}

.error-message i {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
}

.leaderboard-table th {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
}

.leaderboard-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.leaderboard-table tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.02);
}

.leaderboard-table tr:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.user-rank {
  font-weight: bold;
  text-align: center;
  min-width: 40px;
}

.top-rank {
  color: var(--highlight-color);
}

.username-cell {
  font-weight: 500;
}

.registration-date {
  font-size: var(--font-small);
  color: var(--text-light);
}

.character-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.stats-item {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-small);
}

.stats-label {
  color: var(--text-light);
  margin-right: var(--spacing-sm);
}

.training-types {
  display: flex;
  gap: var(--spacing-sm);
}

.training-badge {
  font-size: var(--font-small);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  background-color: var(--bg-color);
}

.training-badge.active {
  background-color: var(--primary-color);
  color: white;
}

.progress-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.progress-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-small);
}

.progress-label {
  min-width: 100px;
  color: var(--text-light);
}

.mini-progress-bar {
  flex: 1;
  height: 6px;
  background-color: var(--border-color);
  border-radius: 3px;
  overflow: hidden;
}

.mini-progress-indicator {
  height: 100%;
  border-radius: 3px;
}

.international-progress .mini-progress-indicator {
  background-color: var(--primary-color);
}

.prosigns-progress .mini-progress-indicator {
  background-color: var(--secondary-color);
}

.regional-progress .mini-progress-indicator {
  background-color: var(--accent-color);
}

.progress-value {
  min-width: 40px;
  text-align: right;
  font-weight: 500;
}

.regional-language {
  font-style: italic;
  color: var(--accent-color);
  margin-left: var(--spacing-sm);
}

/* ================ MURMUR SECTION ================ */
.lock-message {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.lock-message i {
  font-size: 3rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

/* ================ DOCUMENTATION SECTION ================ */
.documentation-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.documentation-card {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
}

.documentation-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-color);
}

.documentation-card h3 {
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.documentation-card h3 i {
  color: var(--primary-color);
  font-size: 1.2em;
}

.documentation-card p {
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.documentation-card .btn {
  width: 100%;
  justify-content: center;
  gap: var(--spacing-sm);
}

/* About SuperMorse content styles */
.about-content {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.about-content.hidden {
  display: none;
}

.about-content h4 {
  color: var(--text-color);
  margin-bottom: var(--spacing-md);
  font-size: 1.1em;
}

.about-content ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

.about-content li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
  color: var(--text-light);
}

.arduino-documentation {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-sm);
  border-left: 3px solid var(--primary-color);
}

.arduino-documentation small {
  color: var(--text-light);
}

.arduino-documentation a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.arduino-documentation a:hover {
  text-decoration: underline;
}

.lock-message h3 {
  margin-bottom: var(--spacing-md);
}

.lock-message .progress-bar {
  max-width: 300px;
  margin: var(--spacing-md) auto;
}

.hf-status {
  display: flex;
  margin-bottom: var(--spacing-lg);
}

.current-band {
  flex: 1;
  text-align: center;
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  margin-right: var(--spacing-md);
}

.current-band #currentBand {
  font-size: var(--font-xlarge);
  font-weight: bold;
  margin: var(--spacing-sm) 0;
}

.signal-strength {
  display: flex;
  justify-content: center;
  gap: 3px;
  margin-top: var(--spacing-sm);
}

.signal-strength span {
  width: 6px;
  border-radius: 1px;
  background-color: var(--border-color);
}

.signal-strength span:nth-child(1) { height: 10px; }
.signal-strength span:nth-child(2) { height: 15px; }
.signal-strength span:nth-child(3) { height: 20px; }
.signal-strength span:nth-child(4) { height: 25px; }
.signal-strength span:nth-child(5) { height: 30px; }

.signal-strength.level-1 span:nth-child(1) { background-color: var(--danger-color); }
.signal-strength.level-2 span:nth-child(1),
.signal-strength.level-2 span:nth-child(2) { background-color: var(--warning-color); }
.signal-strength.level-3 span:nth-child(1),
.signal-strength.level-3 span:nth-child(2),
.signal-strength.level-3 span:nth-child(3) { background-color: var(--secondary-color); }
.signal-strength.level-4 span:nth-child(1),
.signal-strength.level-4 span:nth-child(2),
.signal-strength.level-4 span:nth-child(3),
.signal-strength.level-4 span:nth-child(4) { background-color: var(--secondary-color); }
.signal-strength.level-5 span { background-color: var(--secondary-color); }

.online-status {
  flex: 1;
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.communication-panel {
  display: flex;
  margin-bottom: var(--spacing-lg);
}

.contacts-list {
  width: 250px;
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  margin-right: var(--spacing-md);
}

.stations {
  margin-top: var(--spacing-sm);
}

.station-item {
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-xs);
  cursor: pointer;
  display: flex;
  align-items: center;
}

.station-item:hover {
  background-color: rgba(0,0,0,0.05);
}

.station-item.active {
  background-color: var(--primary-color);
  color: white;
}

.station-item .callsign {
  font-weight: bold;
  margin-right: var(--spacing-xs);
}

.station-item .locator {
  font-size: var(--font-small);
  color: var(--text-light);
}

.station-item.active .locator {
  color: rgba(255,255,255,0.8);
}

.morse-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-md);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  background-color: var(--card-bg);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-md);
  min-height: 300px;
}

.message {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.message:last-child {
  border-bottom: none;
}

.message .header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
}

.message .sender {
  font-weight: bold;
}

.message .time {
  font-size: var(--font-small);
  color: var(--text-light);
}

.message .content {
  font-family: monospace;
}

.input-area {
  display: flex;
}

.input-area input {
  flex: 1;
  margin-right: var(--spacing-sm);
}

.voice-controls {
  padding: var(--spacing-md);
  background-color: var(--bg-color);
  border-radius: var(--border-radius-md);
}

.volume-control {
  display: flex;
  align-items: center;
  margin-top: var(--spacing-md);
}

.volume-control label {
  margin-right: var(--spacing-md);
  min-width: 70px;
}

/* ================ MODAL ================ */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal {
  background-color: var(--card-bg);
  border-radius: var(--border-radius-md);
  width: 90%;
  max-width: 500px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.modal-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  margin-bottom: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: var(--font-large);
  cursor: pointer;
  color: var(--text-light);
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
}

/* Web specific additions */
.coming-soon-banner {
  background-color: var(--info-color);
  color: white;
  text-align: center;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-md);
}

.permissions-request {
  background-color: var(--highlight-color);
  color: var(--text-color);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.permissions-request button {
  margin-left: var(--spacing-md);
}

/* ================ RESPONSIVE STYLES ================ */
@media (max-width: 900px) {
  .app-layout {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    margin-right: 0;
    margin-bottom: var(--spacing-md);
  }
  
  .learning-panel,
  .progress-overview,
  .communication-panel {
    flex-direction: column;
  }
  
  .current-character,
  .mastery-stats,
  .contacts-list {
    margin-right: 0;
    margin-bottom: var(--spacing-md);
    width: 100%;
  }
  
  .lesson-stats {
    grid-template-columns: 1fr;
  }
}