/* CSS Custom Properties for Theming */
:root {
  /* Light theme colors */
  --bg-color: #ffffff;
  --text-color: #333333;
  --border-color: #e0e0e0;
  --input-bg: #ffffff;
  --input-border: #cccccc;
  --input-focus: #ff9900;
  --accent-color: #ff9900;
  --secondary-bg: #f8f9fa;
  --error-color: #dc3545;
  --success-color: #28a745;
  --muted-color: #666666;
  --shadow: rgba(0, 0, 0, 0.1);
  --canvas-bg: #ffffff;
}

[data-theme="dark"] {
  /* Dark theme colors */
  --bg-color: #1a1a1a;
  --text-color: #ffffff;
  --border-color: #404040;
  --input-bg: #2d2d2d;
  --input-border: #555555;
  --input-focus: #ff9900;
  --accent-color: #ff9900;
  --secondary-bg: #2d2d2d;
  --error-color: #ff6b6b;
  --success-color: #51cf66;
  --muted-color: #aaaaaa;
  --shadow: rgba(0, 0, 0, 0.3);
  --canvas-bg: #2d2d2d;
}

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

/* Font Loading Optimization */
@font-face {
  font-family: 'System UI';
  src: local('system-ui'), local('-apple-system'), local('BlinkMacSystemFont');
  font-display: swap;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  font-display: swap;
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem;
}

.header-icons {
  display: flex;
  gap: 0.5rem;
}

.icon-button {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-color);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-button:hover {
  background: var(--accent-color);
  color: white;
  transform: translateY(-1px);
}

.icon-button:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Main Layout */
.main-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
  padding-top: 5rem; /* Account for fixed header */
  min-height: 100vh;
}

/* Form Section */
.form-section {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 6px var(--shadow);
}

.form-section h1 {
  color: var(--accent-color);
  margin-bottom: 1.5rem;
  font-size: 1.75rem;
  font-weight: 600;
}

.speaker-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  font-weight: 500;
  color: var(--text-color);
  font-size: 0.9rem;
}

input, textarea, select {
  padding: 0.75rem;
  border: 2px solid var(--input-border);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text-color);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.1);
}

textarea {
  resize: vertical;
  min-height: 100px;
}

/* Bio input container with override toggle */
.bio-input-container {
  position: relative;
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
}

.bio-input-container textarea {
  flex: 1;
}

.override-toggle {
  background: var(--secondary-bg);
  border: 2px solid var(--input-border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  color: var(--text-color);
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  min-width: 80px;
  font-size: 0.8rem;
  white-space: nowrap;
  background: var(--input-bg);
}

.override-toggle:hover {
  border-color: var(--accent-color);
  background: var(--accent-color);
  color: white;
  transform: translateY(-1px);
}

.override-toggle:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.1);
}

.override-toggle[aria-pressed="true"] {
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
}

.override-toggle[aria-pressed="true"] .override-icon {
  transform: rotate(45deg);
}

.override-icon {
  font-size: 1rem;
  transition: transform 0.2s ease;
}

.override-text {
  font-weight: 500;
  line-height: 1;
}

/* Field notes and help text */
.field-note {
  font-size: 0.8rem;
  color: var(--secondary-text);
  margin-top: 0.25rem;
  font-style: italic;
}

/* Test button styles */
.btn {
  background: var(--accent-color);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn:hover {
  background: #e68900;
  transform: translateY(-1px);
}

.btn:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.btn-secondary {
  background: var(--secondary-bg);
  color: var(--text-color);
  border: 2px solid var(--border-color);
}

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

/* Responsive design for bio input container */
@media (max-width: 768px) {
  .bio-input-container {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .override-toggle {
    min-width: 100px;
    padding: 0.75rem;
    font-size: 0.9rem;
  }
  
  .override-toggle .override-text {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .bio-input-container {
    gap: 0.5rem;
  }
  
  .override-toggle {
    min-width: 90px;
    padding: 0.5rem 0.75rem;
  }
}

.char-counter {
  font-size: 0.8rem;
  color: var(--muted-color);
  text-align: right;
}

.char-counter.over-limit {
  color: var(--error-color);
  font-weight: 600;
}

/* Form Actions */
.form-actions {
  margin-top: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

.btn-secondary:hover {
  background: #e68900;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--shadow);
}

.btn-secondary:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* Preview Section */
.preview-section {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 6px var(--shadow);
  display: flex;
  flex-direction: column;
}

.preview-section h2 {
  color: var(--accent-color);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
  font-weight: 600;
}

.canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--canvas-bg);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

#preview-canvas {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 2px 8px var(--shadow);
}

/* Skip Link for Screen Readers */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--accent-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1001;
  font-weight: 500;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 6px;
}

/* Screen Reader Only Content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Required Field Indicator */
.required-indicator {
  color: var(--error-color);
  font-weight: bold;
  margin-left: 2px;
}

/* Improved Focus Styles */
*:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Enhanced Button Focus */
.icon-button:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
}

/* Form Focus Management */
.form-group input:focus-visible,
.form-group textarea:focus-visible,
.form-group select:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 1px;
  box-shadow: 0 0 0 4px rgba(255, 153, 0, 0.1);
}

/* Responsive Design */
@media (max-width: 1200px) {
  .main-container {
    max-width: 100%;
    padding: 1.5rem;
  }
  
  #preview-canvas {
    max-width: 100%;
    height: auto;
  }
}

@media (max-width: 1024px) {
  .main-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 1rem;
    padding-top: 4rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  fieldset.form-row {
    display: block;
  }
  
  fieldset.form-row .form-group {
    margin-bottom: 1rem;
  }
  
  #preview-canvas {
    width: 100%;
    max-width: 600px;
  }
  
  .canvas-container {
    padding: 0.5rem;
  }
}

@media (max-width: 768px) {
  .header {
    position: static;
    padding: 1rem 0;
    text-align: right;
  }
  
  .main-container {
    padding: 1rem 0.5rem;
    padding-top: 1rem;
    gap: 1rem;
  }
  
  .form-section, .preview-section {
    padding: 1rem;
    border-radius: 8px;
  }
  
  .form-section h1 {
    font-size: 1.5rem;
  }
  
  .preview-section h2 {
    font-size: 1.25rem;
  }
  
  .header-icons {
    gap: 0.25rem;
  }
  
  .icon-button {
    padding: 0.4rem;
  }
  
  /* Improve touch targets on mobile */
  .btn {
    min-height: 44px;
    padding: 0.75rem 1rem;
  }
  
  input, textarea, select {
    min-height: 44px;
    font-size: 16px; /* Prevent zoom on iOS */
  }
}

@media (max-width: 480px) {
  .main-container {
    padding: 0.5rem;
  }
  
  .form-section, .preview-section {
    padding: 0.75rem;
  }
  
  .form-section h1 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
  }
  
  .canvas-container {
    padding: 0.25rem;
  }
  
  #preview-canvas {
    max-width: 100%;
    width: 100%;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --input-border: #000000;
    --text-color: #000000;
    --bg-color: #ffffff;
  }
  
  [data-theme="dark"] {
    --border-color: #ffffff;
    --input-border: #ffffff;
    --text-color: #ffffff;
    --bg-color: #000000;
  }
  
  .icon-button,
  .btn {
    border: 2px solid currentColor;
  }
  
  input, textarea, select {
    border: 2px solid currentColor;
  }
}

/* Improved Color Contrast */
:root {
  /* Enhanced contrast ratios for WCAG AA compliance */
  --text-color: #1a1a1a; /* Darker for better contrast */
  --muted-color: #4a4a4a; /* Darker muted text */
  --border-color: #d0d0d0; /* Slightly darker borders */
}

[data-theme="dark"] {
  --text-color: #f5f5f5; /* Lighter for better contrast on dark */
  --muted-color: #c0c0c0; /* Lighter muted text on dark */
  --border-color: #505050; /* Lighter borders on dark */
}

/* Canvas Error Display */
.canvas-error {
  padding: 2rem;
  text-align: center;
  color: var(--error-color);
  background: var(--secondary-bg);
  border: 2px dashed var(--error-color);
  border-radius: 8px;
  max-width: 400px;
  margin: 0 auto;
}

.canvas-error h3 {
  margin-bottom: 1rem;
  color: var(--error-color);
  font-size: 1.2rem;
}

.canvas-error p {
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.canvas-error .error-details {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--muted-color);
  font-style: italic;
}

/* Browser Compatibility Messages */
.compatibility-warning {
  background: rgba(255, 193, 7, 0.1);
  border: 1px solid #ffc107;
  color: #856404;
  padding: 1rem;
  border-radius: 8px;
  margin: 1rem 0;
  font-size: 0.9rem;
}

[data-theme="dark"] .compatibility-warning {
  background: rgba(255, 193, 7, 0.2);
  color: #ffc107;
}

/* Enhanced Keyboard Navigation */
.form-group {
  position: relative;
}

/* Keyboard navigation indicators */
.form-group:focus-within label {
  color: var(--accent-color);
  font-weight: 600;
}

/* Tab order improvements */
.header-icons {
  display: flex;
  gap: 0.5rem;
}

.header-icons button {
  order: 1;
}

#theme-toggle {
  order: 2;
}

#github-link {
  order: 1;
}

/* Focus trap for modals */
.copy-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.copy-modal-content {
  position: relative;
}

.copy-modal-content:focus {
  outline: none;
}

/* ARIA Live Region Styling */
[aria-live] {
  position: relative;
}

.char-counter[aria-live="polite"] {
  /* Ensure live regions are announced properly */
  speak: literal-punctuation;
}

/* Error State Improvements */
.form-group[aria-invalid="true"] input,
.form-group[aria-invalid="true"] textarea,
.form-group[aria-invalid="true"] select {
  border-color: var(--error-color);
  background-color: rgba(220, 53, 69, 0.05);
}

.form-group[aria-invalid="true"] label {
  color: var(--error-color);
}

/* Success State */
.form-group[aria-invalid="false"]:has(input:not(:placeholder-shown)),
.form-group[aria-invalid="false"]:has(textarea:not(:placeholder-shown)),
.form-group[aria-invalid="false"]:has(select:not([value=""])) {
  position: relative;
}

.form-group[aria-invalid="false"]:has(input:not(:placeholder-shown))::after,
.form-group[aria-invalid="false"]:has(textarea:not(:placeholder-shown))::after,
.form-group[aria-invalid="false"]:has(select:not([value=""]))::after {
  content: "✓";
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--success-color);
  font-weight: bold;
  pointer-events: none;
}

/* Form Validation States */
.form-group.error input,
.form-group.error textarea,
.form-group.error select {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
  background-color: rgba(220, 53, 69, 0.05);
}

.form-group.warning input,
.form-group.warning textarea,
.form-group.warning select {
  border-color: #ffc107;
  box-shadow: 0 0 0 3px rgba(255, 193, 7, 0.1);
  background-color: rgba(255, 193, 7, 0.05);
}

.form-group.valid input,
.form-group.valid textarea,
.form-group.valid select {
  border-color: var(--success-color);
  box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
  background-color: rgba(40, 167, 69, 0.05);
}

.field-error {
  color: var(--error-color);
  font-size: 0.8rem;
  margin-top: 0.25rem;
  display: none;
  padding: 0.25rem 0;
  font-weight: 500;
}

.field-warning {
  color: #ffc107;
  font-size: 0.8rem;
  margin-top: 0.25rem;
  display: none;
  padding: 0.25rem 0;
  font-weight: 500;
}

.error-message {
  color: var(--error-color);
  font-size: 0.8rem;
  margin-top: 0.25rem;
}

/* Character Counter States */
.char-counter {
  font-size: 0.8rem;
  color: var(--muted-color);
  text-align: right;
  transition: color 0.2s ease;
}

.char-counter.warning {
  color: #ffc107;
  font-weight: 500;
}

.char-counter.error {
  color: var(--error-color);
  font-weight: 600;
}

/* Success feedback */
.success-message {
  color: var(--success-color);
  font-size: 0.9rem;
  padding: 0.5rem;
  background: rgba(40, 167, 69, 0.1);
  border-radius: 4px;
  margin-top: 0.5rem;
}

/* Copy Functionality Styles */
.copy-feedback {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  color: white;
  font-weight: 500;
  z-index: 1000;
  max-width: 300px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  animation: slideInRight 0.3s ease-out;
}

.copy-feedback-success {
  background-color: var(--success-color);
}

.copy-feedback-error {
  background-color: var(--error-color);
}

.copy-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease-out;
}

.copy-modal-content {
  background: var(--bg-color);
  color: var(--text-color);
  padding: 2rem;
  border-radius: 12px;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  animation: slideInUp 0.3s ease-out;
}

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

.copy-modal-header h3 {
  margin: 0;
  color: var(--accent-color);
}

.copy-modal-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-color);
  line-height: 1;
  padding: 0.25rem;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.copy-modal-close:hover {
  background: var(--secondary-bg);
}

.copy-modal-body p {
  margin-bottom: 1rem;
  line-height: 1.5;
}

.copy-text-area {
  width: 100%;
  height: 200px;
  margin: 1rem 0;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--secondary-bg);
  color: var(--text-color);
  font-family: 'Courier New', Consolas, monospace;
  font-size: 14px;
  resize: vertical;
  line-height: 1.4;
}

.copy-text-area:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

.copy-instructions {
  font-size: 0.9rem;
  color: var(--muted-color);
  background: var(--secondary-bg);
  padding: 1rem;
  border-radius: 8px;
  border-left: 4px solid var(--accent-color);
}

/* Copy Feedback Animations */
@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Responsive adjustments for copy modal */
@media (max-width: 768px) {
  .copy-modal-content {
    width: 95%;
    padding: 1.5rem;
    margin: 1rem;
  }
  
  .copy-text-area {
    height: 150px;
    font-size: 13px;
  }
  
  .copy-feedback {
    right: 10px;
    left: 10px;
    max-width: none;
  }
}