/* Global Styles */
:root {
  --dark-bg: #121212;
  --darker-bg: #0a0a0a;
  --dark-accent: #2a2a2a;
  --light-text: #f5f5f5;
  --light-bg: #ffffff;
  --light-accent: #f0f0f0;
  --dark-text: #222222;
  --primary-color: #4a90e2;
  --primary-hover: #357ABD;
  --success-color: #4CAF50;
  --danger-color: #f44336;
  --sidebar-width: 380px;
  --transition-speed: 0.3s;
  --sidebar-collapsed-width: 70px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--dark-bg);
  color: var(--light-text);
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  min-height: 100vh;
  overflow-x: hidden;
}

.layout {
  display: flex;
  height: 100vh;
  position: relative;
}

/* Sidebar Styles */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--darker-bg);
  color: var(--light-text);
  padding: 20px;
  box-sizing: border-box;
  overflow-y: auto;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 10;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-speed);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
  padding: 20px 5px;
}

.sidebar.collapsed .control-group h3,
.sidebar.collapsed .control label,
.sidebar.collapsed .control input,
.sidebar.collapsed .control select,
.sidebar.collapsed .value-label {
  display: none;
}

.sidebar.collapsed .control-group {
  margin-bottom: 30px;
}

.sidebar.collapsed .sidebar-header h1 {
  display: none;
}

.sidebar-header {
  margin-bottom: 20px;
  text-align: center;
}

.sidebar h1 {
  font-size: 1.5rem;
  margin: 0 0 15px 0;
}

.sidebar h3 {
  margin: 10px 0;
  font-size: 1.1rem;
  color: var(--primary-color);
}

.control-group {
  margin-bottom: 20px;
  border-bottom: 1px solid var(--dark-accent);
  padding-bottom: 10px;
  transition: border-color var(--transition-speed);
}

.control-group:last-of-type {
  border-bottom: none;
}

.control {
  display: flex;
  align-items: center;
  margin: 8px 0;
}

.control label {
  flex: 0 0 150px;
  margin-right: 10px;
  font-size: 0.9rem;
  white-space: nowrap;
}

.control input[type="range"],
.control select,
.control input[type="text"] {
  flex: 1;
  padding: 5px;
  border-radius: 4px;
  border: 1px solid var(--dark-accent);
  background-color: var(--dark-bg);
  color: var(--light-text);
  transition: all var(--transition-speed);
}

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

.value-label {
  display: inline-block;
  width: 40px;
  text-align: center;
  margin-left: 8px;
  font-size: 0.9rem;
  background: var(--dark-accent);
  padding: 2px 4px;
  border-radius: 3px;
}

/* Main Content Styles */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 30px;
  overflow-y: auto;
  background: var(--dark-bg);
  color: var(--light-text);
  box-sizing: border-box;
  transition: margin-left var(--transition-speed), background var(--transition-speed), color var(--transition-speed);
  height: 100vh;
}

.main-content.expanded {
  margin-left: var(--sidebar-collapsed-width);
}

.content-container {
  max-width: 1200px;
  margin: 0 auto;
}

.ascii-output {
  background: var(--darker-bg);
  padding: 20px;
  white-space: pre;
  font-family: Consolas, Monaco, "Liberation Mono", monospace;
  font-size: 7px;
  line-height: 7px;
  overflow: auto;
  border-radius: 5px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.3);
  margin-bottom: 20px;
  max-height: calc(100vh - 250px);
  transition: background var(--transition-speed);
}

.button-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Upload Area Styling */
.upload-area {
  border: 2px dashed var(--primary-color);
  border-radius: 6px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.2s;
}

.upload-area:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.upload-area i {
  font-size: 2rem;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.upload-area input[type="file"] {
  display: none;
}

.upload-area.dragover {
  background-color: rgba(74, 144, 226, 0.1);
  border-color: var(--primary-hover);
}

/* Sample Images */
.sample-thumbnails {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sample-thumbnail {
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 2px solid transparent;
}

.sample-thumbnail:hover {
  transform: scale(1.05);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  border-color: var(--primary-color);
}

/* History Panel */
.history-item {
  margin-bottom: 15px;
  cursor: pointer;
  transition: transform 0.2s;
}

.history-item:hover {
  transform: scale(1.02);
}

.history-thumbnail {
  width: 100%;
  height: 120px;
  background-color: var(--darker-bg);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.history-thumbnail pre {
  font-size: 3px;
  line-height: 3px;
  margin: 0;
  white-space: pre;
}

.history-timestamp {
  font-size: 0.8rem;
  margin-top: 5px;
  color: #888;
}

/* Original Image Container */
.original-image-container {
  text-align: center;
  margin-bottom: 20px;
}

.original-image-container img {
  max-height: calc(100vh - 250px);
  max-width: 100%;
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

/* Side by Side */
#side-by-side-pane .row {
  align-items: stretch;
}

#side-by-side-pane .col-md-6 {
  display: flex;
  flex-direction: column;
}

#side-by-side-pane h4 {
  text-align: center;
  margin-bottom: 15px;
}

#side-by-side-pane img {
  max-height: calc(100vh - 300px);
  object-fit: contain;
  margin: 0 auto;
}

#side-by-side-pane .ascii-output {
  flex: 1;
  max-height: none;
  height: calc(100vh - 300px);
}

/* Custom Theme Colors */
.color-preview {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-block;
  margin-left: 10px;
  border: 1px solid #ccc;
}

/* Keyboard Shortcuts */
.keyboard-shortcuts kbd {
  background-color: var(--dark-accent);
  border-radius: 3px;
  border: 1px solid #ccc;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 2px var(--dark-bg) inset;
  color: var(--light-text);
  display: inline-block;
  font-family: monospace;
  font-size: 0.85em;
  line-height: 1;
  padding: 3px 5px;
  margin: 0 2px;
}

/* Animations */
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.pulse {
  animation: pulse 1s;
}

/* Loading indicator */
.loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  background-color: rgba(0, 0, 0, 0.7);
  padding: 20px;
  border-radius: 10px;
  z-index: 1000;
}

.loading:after {
  content: '';
  display: block;
  width: 40px;
  height: 40px;
  margin: 20px auto;
  border-radius: 50%;
  border: 4px solid #fff;
  border-color: var(--primary-color) transparent var(--primary-color) transparent;
  animation: spin 1.2s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Success Animation */
.success {
  position: relative;
}

.success::after {
  content: '✓';
  color: var(--success-color);
  margin-left: 5px;
}

/* Light Mode Styles */
body.light-mode {
  background-color: var(--light-bg);
  color: var(--dark-text);
}

body.light-mode .sidebar {
  background: var(--light-accent);
  color: var(--dark-text);
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

body.light-mode .control-group {
  border-bottom: 1px solid #ddd;
}

body.light-mode .main-content {
  background: var(--light-bg);
  color: var(--dark-text);
}

body.light-mode .ascii-output {
  background: #f9f9f9;
  color: var(--dark-text);
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
}

body.light-mode .value-label {
  background: #e0e0e0;
  color: var(--dark-text);
}

body.light-mode .upload-area {
  border-color: var(--primary-color);
}

body.light-mode .keyboard-shortcuts kbd {
  background-color: #f7f7f7;
  color: var(--dark-text);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 2px #fff inset;
}

body.light-mode .history-thumbnail {
  background-color: #f0f0f0;
}

/* Custom Theme */
.custom-theme .ascii-output {
  transition: background-color 0.3s, color 0.3s;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .sidebar {
    width: 300px;
  }
  
  .main-content {
    margin-left: 300px;
  }
  
  .main-content.expanded {
    margin-left: var(--sidebar-collapsed-width);
  }
  
  :root {
    --sidebar-width: 300px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    width: 100%;
    z-index: 1050;
  }
  
  .sidebar.mobile-visible {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
    padding: 15px;
  }
  
  .control {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .control label {
    margin-bottom: 5px;
    flex: none;
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .button-group .btn, 
  .button-group .btn-group {
    width: 100%;
    margin-bottom: 10px;
  }
}

/* Colorized ASCII Mode */
.color-ascii pre {
  color: unset !important;
  background: unset !important;
}

.color-ascii span {
  display: inline-block;
}

/* Tab Styling */
.nav-tabs .nav-link {
  color: var(--primary-color);
}

.nav-tabs .nav-link.active {
  background-color: var(--darker-bg);
  color: var(--light-text);
  border-color: var(--dark-accent);
}

body.light-mode .nav-tabs .nav-link.active {
  background-color: var(--light-bg);
  color: var(--dark-text);
  border-color: #dee2e6;
}

/* Custom File Input */
.custom-file-button label {
  overflow: hidden;
}

/* Animation for tab switching */
.tab-pane.fade {
  transition: opacity 0.15s linear;
}

/* Quick Settings Sidebar */
.quick-settings {
  position: fixed;
  right: -250px;
  top: 50%;
  transform: translateY(-50%);
  width: 250px;
  background: var(--darker-bg);
  padding: 15px;
  border-radius: 10px 0 0 10px;
  transition: right 0.3s;
  z-index: 100;
  box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
}

.quick-settings.visible {
  right: 0;
}

.quick-settings-toggle {
  position: absolute;
  left: -40px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--darker-bg);
  color: var(--primary-color);
  width: 40px;
  height: 40px;
  border-radius: 5px 0 0 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

body.light-mode .quick-settings {
  background: var(--light-accent);
}

body.light-mode .quick-settings-toggle {
  background: var(--light-accent);
}

/* Drop zone highlight styles */
.drop-zone-highlight {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(74, 144, 226, 0.2);
  border: 5px dashed var(--primary-color);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.drop-zone-highlight::after {
  content: 'Drop Image Here';
  font-size: 2rem;
  color: var(--primary-color);
  background-color: rgba(0, 0, 0, 0.7);
  padding: 20px 40px;
  border-radius: 10px;
}

/* Tooltip styling */
.tooltip-inner {
  max-width: 200px;
  padding: 0.25rem 0.5rem;
  color: #fff;
  text-align: center;
  background-color: var(--dark-accent);
  border-radius: 0.25rem;
}