/* Studio Image Editor & Masking Suite - Main Stylesheet */
:root {
  --bg-app: #0a0d13;
  --bg-panel: #111622;
  --bg-panel-hover: #171f30;
  --bg-panel-active: #1d273d;
  --bg-input: #0e131d;
  --bg-canvas-wrapper: #07090e;
  
  --border-subtle: #1e293b;
  --border-medium: #334155;
  --border-focus: #3b82f6;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-disabled: #475569;
  
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --accent-blue-glow: rgba(59, 130, 246, 0.25);
  
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  
  --accent-ruby: #f43f5e;
  --accent-ruby-glow: rgba(244, 63, 94, 0.3);
  
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;
  
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 28px -4px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 20px -2px var(--accent-blue-glow);
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.22s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  user-select: none;
  display: flex;
  flex-direction: column;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* App Header */
.app-header {
  height: 48px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.2px;
  color: #fff;
}

.brand-img-logo {
  height: 28px;
  width: auto;
  border-radius: 6px;
  object-fit: contain;
  box-shadow: 0 0 14px rgba(59, 130, 246, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.brand-logo span {
  background: linear-gradient(135deg, #ffffff 30%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

.brand-badge {
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #60a5fa;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.header-menu-bar {
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Tool Context Options Bar */
.tool-options-bar {
  height: 40px;
  background: var(--bg-app);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 16px;
  font-size: 12px;
  color: var(--text-secondary);
  z-index: 90;
}

.options-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.options-divider {
  width: 1px;
  height: 20px;
  background: var(--border-subtle);
}

/* Main Studio Layout */
.app-workspace {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
}

/* Left Tools Bar */
.tools-sidebar {
  width: 48px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 0;
  gap: 4px;
  z-index: 80;
}

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

.tool-button:hover {
  background: var(--bg-panel-hover);
  color: var(--text-primary);
}

.tool-button.active {
  background: var(--accent-blue);
  color: #ffffff;
  box-shadow: 0 0 12px var(--accent-blue-glow);
}

.tool-button .hotkey-badge {
  position: absolute;
  bottom: 2px;
  right: 2px;
  font-size: 8px;
  font-family: var(--font-mono);
  opacity: 0.6;
}

/* Center Viewport Area */
.viewport-container {
  flex: 1;
  background: var(--bg-canvas-wrapper);
  position: relative;
  overflow: hidden;
  display: block;
  cursor: default;
}

.viewport-container.panning {
  cursor: grab !important;
}

.viewport-container.panning:active {
  cursor: grabbing !important;
}

.viewport-container.crosshair {
  cursor: crosshair !important;
}

/* Canvas Viewport Stack */
.canvas-stage {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.08);
}

/* Checkerboard transparent background */
.checkerboard-bg {
  background-color: #1e222d;
  background-image: 
    linear-gradient(45deg, #161922 25%, transparent 25%), 
    linear-gradient(-45deg, #161922 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #161922 75%), 
    linear-gradient(-45deg, transparent 75%, #161922 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.canvas-layer {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

#mainCanvas {
  display: block;
}

#maskPreviewCanvas, #interactiveCanvas, #cropOverlayCanvas {
  pointer-events: none;
}

/* Viewport HUD Floating Overlays */
.viewport-hud {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(17, 22, 34, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  padding: 4px 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-lg);
  z-index: 50;
}

.viewport-stats {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(17, 22, 34, 0.8);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 6px 10px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  display: flex;
  gap: 12px;
  pointer-events: none;
  z-index: 50;
}

.hud-pill-button {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 500;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all var(--transition-fast);
}

.hud-pill-button:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.hud-pill-button.active {
  background: var(--accent-blue);
  color: #fff;
  box-shadow: 0 0 10px var(--accent-blue-glow);
}

.hud-pill-button.ruby.active {
  background: var(--accent-ruby);
  color: #fff;
  box-shadow: 0 0 10px var(--accent-ruby-glow);
}

/* Right Sidebars & Inspector */
.inspector-sidebar {
  width: 320px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  z-index: 80;
}

.sidebar-tab-header {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-app);
}

.sidebar-tab-btn {
  flex: 1;
  padding: 10px 4px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.sidebar-tab-btn:hover {
  color: var(--text-secondary);
}

.sidebar-tab-btn.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
  background: var(--bg-panel);
}

.sidebar-tab-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: none;
}

.sidebar-tab-content.active {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Panels */
.panel-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-secondary);
}

/* Responsive modal styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.modal-overlay.open {
  display: flex;
  opacity: 1;
}

.modal-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 580px;
  max-height: 90vh;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalPop 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
  from {
    opacity: 0;
    transform: scale(0.96) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}