/* PixlFlow - Modern Creative SaaS UI */

/* CSS Custom Properties for Design System */
:root {
  /* Colors - Light Mode */
  --color-background: #fafbfc;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;
  --color-surface-hover: #f8f9fa;
  --color-border: #e1e8ed;
  --color-border-light: #f1f3f4;
  --color-text-primary: #1a1d23;
  --color-text-secondary: #64748b;
  --color-text-tertiary: #94a3b8;
  --color-text-inverse: #ffffff;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  --gradient-accent: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
  --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --glass-backdrop: blur(16px);
  
  /* Shadows */
  --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-large: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --space-xs: 0.25rem;   /* 4px */
  --space-sm: 0.5rem;    /* 8px */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2rem;      /* 32px */
  --space-2xl: 3rem;     /* 48px */
  --space-3xl: 4rem;     /* 64px */
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 2rem;     /* 32px */
  
  /* Layout */
  --header-height: 60px;
  --sidebar-width: 280px;
  --sidebar-width-collapsed: 60px;
  
  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
[data-theme="dark"] {
  --color-background: #0f1419;
  --color-surface: #1a1f2e;
  --color-surface-elevated: #252a3a;
  --color-surface-hover: #2a3441;
  --color-border: #2d3748;
  --color-border-light: #374151;
  --color-text-primary: #f7fafc;
  --color-text-secondary: #a0aec0;
  --color-text-tertiary: #718096;
  --color-text-inverse: #1a1d23;
  
  --glass-bg: rgba(26, 31, 46, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* Base Reset and Typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  background: var(--color-background);
  overflow-x: hidden;
  transition: background-color var(--transition-base);
}

/* Layout Structure */
body {
  display: grid;
  grid-template-areas: 
    "header header"
    "sidebar main";
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  min-height: 100vh;
}

/* Header */
.header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all var(--transition-base);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.header-center {
  flex: 1;
  display: flex;
  justify-content: center;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Auth Buttons */
.auth-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.auth-buttons .btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.auth-buttons .btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.auth-buttons .btn-primary {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  text-decoration: none;
  user-select: none;
}

.logo-image {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.logo-icon {
  width: 32px;
  height: 32px;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.logo-gradient {
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-small);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

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

.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.btn-gradient {
  background: var(--gradient-accent);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-small);
}

.btn-gradient:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

.btn-link {
  background: transparent;
  color: var(--color-text-secondary);
  padding: 0;
  text-decoration: underline;
}

.btn-link:hover:not(:disabled) {
  color: var(--color-text-primary);
}

.btn-large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-md);
  border-radius: var(--radius-lg);
}

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

.btn-full {
  width: 100%;
}

/* Sidebar Toggle */
.sidebar-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

/* Project Badge */
.project-badge {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* User Menu */
.user-avatar {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.user-avatar:hover {
  background: var(--color-surface-hover);
}

.avatar-bg {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + var(--space-xs));
  right: 0;
  min-width: 200px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  backdrop-filter: var(--glass-backdrop);
  padding: var(--space-xs);
  display: none;
  z-index: 1000;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.dropdown-item:hover {
  background: var(--color-surface-hover);
}

.dropdown-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-xs) 0;
}

/* Sidebar */
.sidebar {
  grid-area: sidebar;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  transition: all var(--transition-base);
}

.sidebar-content {
  padding: var(--space-lg);
}

.sidebar-section {
  margin-bottom: var(--space-xl);
}

.sidebar-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.empty-projects,
.empty-versions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

/* Sidebar Version History */
.version-item-sidebar {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-xs);
}

.version-item-sidebar:hover {
  background: var(--color-surface-hover);
}

.version-item-sidebar.active {
  background: rgba(102, 126, 234, 0.1);
  border: 1px solid rgba(102, 126, 234, 0.3);
}

.version-thumbnail {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--color-surface);
}

.version-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.version-info {
  flex: 1;
  min-width: 0;
}

.version-prompt {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.version-time {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.version-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(102, 126, 234, 1);
  flex-shrink: 0;
}

.menu-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  font-size: var(--font-size-sm);
}

.menu-item:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

/* Usage Display */
.usage-display {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

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

.usage-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.usage-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.usage-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* Main Content */
.main-content {
  grid-area: main;
  overflow-y: auto;
  background: var(--color-background);
}

.editor-container {
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Empty State */
.upload-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl);
}

.empty-state {
  max-width: 600px;
  text-align: center;
}

.empty-illustration {
  margin-bottom: var(--space-2xl);
  position: relative;
}

.upload-visual {
  position: relative;
  display: inline-block;
}

.upload-circle {
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px dashed var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-tertiary);
  transition: all var(--transition-base);
}

.upload-glow {
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  opacity: 0;
  z-index: -1;
  filter: blur(20px);
  transition: opacity var(--transition-base);
}

.upload-area:hover .upload-circle {
  border-color: var(--color-text-secondary);
  color: var(--color-text-secondary);
}

.upload-area:hover .upload-glow {
  opacity: 0.1;
}

.empty-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.empty-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  line-height: 1.6;
}

.upload-actions {
  margin-bottom: var(--space-2xl);
}

.upload-info {
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

/* Sample Prompts */
.sample-prompts h4 {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.prompt-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.prompt-chip {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.prompt-chip:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-small);
}

/* Image Area */
.image-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-xl);
  min-height: 0;
}

/* Project Title Bar */
.project-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-small);
  margin-bottom: var(--space-md);
}

.project-title-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  outline: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.project-title-input:hover,
.project-title-input:focus {
  background: var(--color-surface-hover);
}

.project-actions {
  display: flex;
  gap: var(--space-xs);
}

.image-display {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-xl) var(--space-xl) var(--space-lg) var(--space-xl);
  min-height: 0;
}

.image-container {
  position: relative;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 50vh;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-elevated);
  margin: var(--space-md) 0;
}

.image-container img {
  max-width: 100%;
  max-height: 50vh;
  width: auto;
  height: auto;
  display: block;
  object-fit: contain;
  border-radius: var(--radius-xl);
}

.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  color: white;
  backdrop-filter: blur(4px);
}

.spinner {
  position: relative;
  width: 40px;
  height: 40px;
}

.spinner-ring {
  width: 100%;
  height: 100%;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top: 3px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  font-size: var(--font-size-lg);
  font-weight: 500;
}

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

/* Image Actions */
.image-actions {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  display: flex;
  gap: var(--space-xs);
}

.action-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-small);
}

.action-btn:hover {
  background: var(--color-surface);
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

/* Prompt Section */
.prompt-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  align-items: center;
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  margin: 0 var(--space-lg);
  box-shadow: var(--shadow-small);
}

.prompt-input-container {
  position: relative;
  width: 100%;
  max-width: 700px;
}

.prompt-input-container input {
  width: 100%;
  padding: var(--space-md) var(--space-xl) var(--space-md) var(--space-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-family: inherit;
  font-size: var(--font-size-md);
  outline: none;
  transition: all var(--transition-base);
}

.prompt-input-container input:focus {
  border-color: transparent;
  background: var(--color-surface-elevated);
  box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.3);
}

.submit-btn {
  position: absolute;
  right: var(--space-xs);
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.submit-btn:hover:not(:disabled) {
  transform: translateY(-50%) scale(1.05);
  box-shadow: var(--shadow-medium);
}

.submit-btn:disabled {
  background: var(--color-border);
  cursor: not-allowed;
}

.loading-dots {
  display: flex;
  gap: 2px;
}

.loading-dots .dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  animation: loading-dots 1.4s ease-in-out infinite both;
}

.loading-dots .dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dots .dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes loading-dots {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

/* Quick Actions */
.quick-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  max-width: 700px;
}

.quick-action {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.quick-action:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
  border-color: rgba(102, 126, 234, 0.3);
  transform: translateY(-1px);
  box-shadow: var(--shadow-small);
}

.quick-action:active {
  transform: translateY(0);
  box-shadow: none;
}

.quick-action-popular {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(102, 126, 234, 0.05));
  border-color: rgba(102, 126, 234, 0.3);
  color: var(--color-text-primary);
}

.quick-action-popular:hover {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(102, 126, 234, 0.1));
  border-color: rgba(102, 126, 234, 0.5);
}

.quick-action-fun {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.1), rgba(168, 85, 247, 0.05));
  border-color: rgba(168, 85, 247, 0.3);
  color: var(--color-text-primary);
}

.quick-action-fun:hover {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(168, 85, 247, 0.1));
  border-color: rgba(168, 85, 247, 0.5);
}

.quick-action-enhance {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(34, 197, 94, 0.05));
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--color-text-primary);
}

.quick-action-enhance:hover {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.2), rgba(34, 197, 94, 0.1));
  border-color: rgba(34, 197, 94, 0.5);
}

.quick-action-blur {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.05));
  border-color: rgba(59, 130, 246, 0.3);
  color: var(--color-text-primary);
}

.quick-action-blur:hover {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.1));
  border-color: rgba(59, 130, 246, 0.5);
}

.quick-action-text {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--color-text-primary);
}

.quick-action-text:hover {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
  border-color: rgba(245, 158, 11, 0.5);
}

.quick-action-bw {
  background: linear-gradient(135deg, rgba(107, 114, 128, 0.1), rgba(107, 114, 128, 0.05));
  border-color: rgba(107, 114, 128, 0.3);
  color: var(--color-text-primary);
}

.quick-action-bw:hover {
  background: linear-gradient(135deg, rgba(107, 114, 128, 0.2), rgba(107, 114, 128, 0.1));
  border-color: rgba(107, 114, 128, 0.5);
}

.quick-action svg {
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.quick-action:hover svg {
  transform: scale(1.1);
}

/* Version Strip */
.version-strip-container {
  padding: var(--space-lg) 0;
}

.version-strip {
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  padding: var(--space-sm);
}

.version-item {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.version-item:hover {
  background: var(--color-surface-hover);
}

.version-item.active {
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-small);
}

.version-item img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-small);
}

.version-item span {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-lg);
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  animation: modal-enter 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-large {
  max-width: 800px;
}

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

.modal-header-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.modal-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin: 0;
}

.project-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.modal-content {
  padding: var(--space-xl);
}

.modal-actions {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

@keyframes modal-enter {
  0% { opacity: 0; transform: scale(0.9) translateY(-10px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* Upgrade Modal */
.upgrade-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: modal-enter 0.3s ease;
}

.upgrade-modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modal-enter 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.upgrade-modal-header {
  padding: 30px 30px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 30px;
}

.upgrade-modal-header h3 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
}

.upgrade-modal .close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 5px;
  border-radius: 50%;
  width: 35px;
  height: 35px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.upgrade-modal .close-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.upgrade-modal-body {
  padding: 0 30px 30px;
}

.upgrade-modal-body p {
  color: var(--color-text-secondary);
  margin-bottom: 30px;
  line-height: 1.6;
}

.upgrade-options {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.plan-option {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all 0.3s ease;
}

.plan-option:hover {
  border-color: rgba(102, 126, 234, 0.3);
  transform: translateY(-2px);
}

.plan-option h4 {
  margin: 0 0 10px;
  color: var(--color-text-primary);
  font-size: 1.2rem;
  font-weight: 600;
}

.plan-option .price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.plan-option ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.plan-option li {
  padding: 5px 0;
  color: var(--color-text-secondary);
  position: relative;
  padding-left: 20px;
}

.plan-option li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #4ade80;
  font-weight: bold;
}

.plan-option .btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

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

.plan-option .btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.plan-option .btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.plan-option .btn-secondary:hover {
  background: var(--primary-color);
  color: white;
}

@media (max-width: 768px) {
  .upgrade-modal {
    margin: 20px;
    max-width: calc(100vw - 40px);
  }
  
  .upgrade-modal-header {
    padding: 20px 20px 0;
  }
  
  .upgrade-modal-body {
    padding: 0 20px 20px;
  }
}

/* Forms */
.form-group {
  margin-bottom: var(--space-md);
}

.form-group input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  font-family: inherit;
  font-size: var(--font-size-md);
  outline: none;
  transition: all var(--transition-base);
}

.form-group input:focus {
  border-color: rgba(102, 126, 234, 0.5);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.auth-switch {
  text-align: center;
  margin-top: var(--space-xl);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Projects Toolbar */
.projects-toolbar {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  margin-bottom: var(--space-xl);
  padding: var(--space-md) 0;
}

.search-container {
  position: relative;
  flex: 1;
  max-width: 300px;
}

.search-container svg {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
}

.search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md) var(--space-sm) 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: rgba(102, 126, 234, 0.5);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.filter-select {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  outline: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-select:focus {
  border-color: rgba(102, 126, 234, 0.5);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-lg);
}

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-small);
  cursor: pointer;
  transition: all var(--transition-base);
  border: 1px solid transparent;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-large);
  border-color: var(--color-border);
}

.project-card:hover .project-actions {
  opacity: 1;
  visibility: visible;
}

.project-thumbnail-container {
  position: relative;
  width: 100%;
  height: 140px;
  background: var(--color-surface);
  overflow: hidden;
}

.project-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.project-card:hover .project-thumbnail {
  transform: scale(1.05);
}

.project-actions {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  display: flex;
  gap: var(--space-xs);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.project-action-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.project-action-btn:hover {
  background: rgba(0, 0, 0, 0.9);
  transform: scale(1.1);
}

.project-info {
  padding: var(--space-md);
  flex: 1;
}

.project-name {
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
  font-size: var(--font-size-md);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
}

.project-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.project-version-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.empty-projects-modal {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-2xl);
  text-align: center;
  color: var(--color-text-tertiary);
}

.empty-projects-modal h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Limit Illustration */
.limit-illustration {
  text-align: center;
  margin-bottom: var(--space-xl);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-large);
  max-width: 400px;
  opacity: 0;
  transform: translateX(100px);
  transition: all var(--transition-base);
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast.removing {
  opacity: 0;
  transform: translateX(100px);
}

.toast-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.toast-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toast-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.toast-success {
  border-left: 4px solid #10b981;
}

.toast-error {
  border-left: 4px solid #ef4444;
}

.toast-info {
  border-left: 4px solid #3b82f6;
}

/* Responsive Design */
/* Large screens - better fullscreen support */
@media (min-width: 1400px) {
  .image-container,
  .image-container img {
    max-height: 55vh;
  }
}

/* Tablet Styles */
@media (max-width: 1200px) {
  :root {
    --sidebar-width: 240px;
  }
  
  .image-container,
  .image-container img {
    max-height: 45vh;
  }
}

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 200px;
  }
  
  .image-container,
  .image-container img {
    max-height: 40vh;
  }
}

/* Mobile Styles */
@media (max-width: 768px) {
  body {
    grid-template-areas: 
      "header"
      "main";
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-height) 1fr;
  }

  .sidebar-toggle {
    display: flex;
  }

  .sidebar {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    z-index: 999;
    transition: left var(--transition-base);
  }

  .sidebar.open {
    left: 0;
  }

  .header-left {
    gap: var(--space-sm);
  }

  .logo-text {
    display: none;
  }

  .quick-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .modal {
    margin: var(--space-md);
    max-width: calc(100vw - var(--space-lg) * 2);
  }

  .modal-actions {
    flex-direction: column;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }
}

/* Sidebar Collapsed State */
.sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
}

.sidebar.collapsed .sidebar-content {
  padding: var(--space-md) var(--space-sm);
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .empty-projects p,
.sidebar.collapsed .empty-versions p,
.sidebar.collapsed .menu-item span,
.sidebar.collapsed .btn,
.sidebar.collapsed .usage-display {
  display: none;
}

.sidebar.collapsed .menu-item {
  justify-content: center;
  padding: var(--space-sm);
}

/* Drag and Drop */
.upload-area.drag-over .upload-circle {
  border-color: rgba(102, 126, 234, 0.5);
  color: rgba(102, 126, 234, 0.8);
  background: rgba(102, 126, 234, 0.05);
}

.upload-area.drag-over .upload-glow {
  opacity: 0.2;
}

/* Paint on Image Feature */

/* Paint Canvas Overlay */
.paint-canvas {
  position: absolute;
  top: 0;
  left: 0;
  cursor: crosshair;
  z-index: 10;
  pointer-events: auto;
  border-radius: var(--radius-lg);
  transition: opacity 0.2s ease;
}

.paint-canvas:hover {
  background: rgba(102, 126, 234, 0.05);
}

/* Paint feature - ensure proper positioning for canvas overlay */
.image-area .image-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}


/* Floating Paint Toolbar */
.paint-toolbar {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  z-index: 20;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-large);
  animation: slideInRight 0.3s ease;
}

.paint-tool {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  color: var(--color-text-secondary);
  position: relative;
}

.paint-tool:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

.paint-tool.active {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.paint-tool.clear-tool {
  color: #dc2626;
}

.paint-tool.clear-tool:hover {
  background: #fef2f2;
  color: #b91c1c;
}

.tool-separator {
  width: 1px;
  height: 24px;
  background: var(--color-border);
  margin: 0 4px;
}

/* Brush Size Slider */
.brush-slider {
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: var(--color-border);
  outline: none;
  cursor: pointer;
  margin: 0 4px;
}

.brush-slider::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-base);
}

.brush-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.brush-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary-color);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

/* Mobile Responsive Paint Toolbar */
@media (max-width: 768px) {
  .paint-toolbar {
    position: fixed;
    top: auto;
    right: auto;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    flex-wrap: wrap;
    justify-content: center;
    max-width: calc(100vw - 40px);
    animation: slideInUp 0.3s ease;
  }
  
  .selected-area-indicator {
    top: 8px;
    left: 8px;
    font-size: var(--font-size-xs);
    padding: 4px 8px;
  }
  
  .paint-tool {
    width: 40px;
    height: 40px;
  }
  
  .brush-slider {
    width: 80px;
  }
}

/* Animations */
@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translate(-50%, 10px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

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

/* Print Styles */
@media print {
  .sidebar,
  .header,
  .modal-overlay {
    display: none !important;
  }
  
  .main-content {
    grid-area: unset;
  }
}