:root {
  --bg-primary: #12131a;
  --bg-secondary: #1a1c24;
  --bg-tertiary: #222631;
  --bg-card: #1e222b;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.4);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(59, 130, 246, 0.5);
  
  --font-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --sidebar-width: 320px;
  --toolbar-width: 70px;
  --header-height: 60px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* Custom Scrollbar Optimization */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

.hidden {
  display: none !important;
}

/* Header styling */
.app-header {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  z-index: 100;
  position: relative;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-area .icon {
  font-size: 24px;
}

.logo-area h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.logo-area .subtitle {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 10px;
  border-left: 1px solid var(--border-color);
  padding-left: 10px;
}

.header-actions {
  display: flex;
  gap: 10px;
}

/* Layout setup */
.app-layout {
  display: flex;
  height: calc(100vh - var(--header-height));
  width: 100vw;
}

/* Button styles */
.btn {
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 0 10px var(--accent-glow);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-card);
  border-color: var(--text-muted);
}

.btn-accent {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #fff;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}
.btn-accent:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.5);
}

.btn-full {
  width: 100%;
}

.btn-template {
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.04);
  text-align: left;
  justify-content: flex-start;
  padding: 10px 12px;
  font-size: 12px;
  width: 100%;
  margin-bottom: 6px;
}
.btn-template:hover {
  background-color: rgba(59, 130, 246, 0.15);
  border-color: var(--accent-color);
  transform: translateX(2px);
}

/* Sidebar styles */
.sidebar-left {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  gap: 1px;
}

.sidebar-panel {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 16px;
}

.panel-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent-color);
  margin-bottom: 12px;
}

.sidebar-panel textarea {
  width: 100%;
  height: 90px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 13px;
  resize: none;
  margin-bottom: 8px;
  outline: none;
}
.sidebar-panel textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 5px rgba(59, 130, 246, 0.2);
}

.helper-text {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 12px;
}

/* Subject Tabs & Templates */
.subject-tabs {
  display: flex;
  background-color: var(--bg-primary);
  padding: 3px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 12px;
  padding: 6px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s ease;
}
.tab-btn.active {
  background-color: var(--bg-tertiary);
  color: #fff;
  font-weight: 500;
}

.templates-container {
  max-height: 250px;
  overflow-y: auto;
}

.template-group .group-title {
  font-size: 11px;
  color: var(--text-muted);
  margin: 8px 0 6px 0;
  font-weight: 600;
}

/* Image Upload dropzone */
.upload-dropzone {
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  background-color: rgba(255, 255, 255, 0.01);
  transition: all 0.2s ease;
}
.upload-dropzone:hover {
  border-color: var(--accent-color);
  background-color: rgba(59, 130, 246, 0.03);
}

.upload-icon {
  font-size: 28px;
  display: block;
  margin-bottom: 8px;
}

.upload-dropzone p {
  font-size: 12px;
  color: var(--text-muted);
}

/* Right Toolbar */
.toolbar-right {
  width: var(--toolbar-width);
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 0;
  gap: 12px;
}

.tool-group, .undo-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-btn {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: 1px solid transparent;
  background-color: var(--bg-tertiary);
  color: var(--text-main);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}
.tool-btn:hover {
  background-color: var(--bg-card);
  border-color: var(--text-muted);
}
.tool-btn.active {
  background-color: var(--accent-color);
  color: #fff;
  box-shadow: 0 0 10px var(--accent-glow);
}

.tool-separator {
  width: 30px;
  height: 1px;
  background-color: var(--border-color);
}

.color-palette {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.1s ease;
}
.color-swatch:hover {
  transform: scale(1.15);
}
.color-swatch.active {
  border-color: #fff;
  transform: scale(1.15);
}

.brush-slider-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.brush-label {
  font-size: 10px;
  color: var(--text-muted);
}

.brush-slider-container input[type="range"] {
  writing-mode: vertical-lr; /* standard but let's just make it regular or vertical */
  direction: rtl;
  width: 6px;
  height: 80px;
  accent-color: var(--accent-color);
}

#brush-size-val {
  font-size: 11px;
  font-weight: 600;
}

/* Workspace Canvas & Floating Windows */
.workspace {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
}

#drawing-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
}

#drawing-canvas.active {
  pointer-events: auto;
}

/* Floating Window Container */
.floating-window {
  position: absolute;
  min-width: 260px;
  min-height: 200px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 20;
}

.floating-window.active-window {
  border-color: var(--accent-color);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.window-header {
  height: 36px;
  background-color: var(--bg-tertiary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 12px;
  cursor: move;
  border-bottom: 1px solid var(--border-color);
}

.window-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 70%;
}

.window-actions {
  display: flex;
  gap: 6px;
}

.win-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  padding: 2px;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.win-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: #fff;
}
.win-btn-close:hover {
  background-color: var(--error-color);
  color: #fff;
}

.window-content {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: #15181f;
  display: flex;
  flex-direction: column;
}

/* Image window specific */
.image-window-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: #0b0c10;
}

.image-window-wrapper img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  user-drag: none;
  -webkit-user-drag: none;
}

/* Selection overlay inside image window */
.crop-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.crop-rect {
  position: absolute;
  border: 2px solid #ff3366;
  background-color: rgba(255, 51, 102, 0.1);
  box-shadow: 0 0 8px rgba(255, 51, 102, 0.4);
  pointer-events: none;
}

.ai-crop-btn {
  position: absolute;
  bottom: 12px;
  right: 12px;
  background-color: #ff3366;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 11px;
  cursor: pointer;
  font-weight: 600;
  box-shadow: 0 4px 10px rgba(255, 51, 102, 0.3);
  z-index: 50;
  transition: all 0.2s ease;
}
.ai-crop-btn:hover {
  background-color: #e62054;
  transform: translateY(-1px);
}

/* Window resizing handle */
.window-resize-handle {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 15px;
  height: 15px;
  cursor: se-resize;
  background: linear-gradient(135deg, transparent 50%, var(--text-muted) 50%);
  z-index: 30;
}

/* Model Settings Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  transition: all 0.3s ease;
}

.modal-card {
  width: 500px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.modal-header {
  padding: 16px 20px;
  background-color: var(--bg-tertiary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.modal-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
}
.modal-close-btn:hover {
  color: #fff;
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-main);
}

.form-group select, .form-group input {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 13px;
  outline: none;
}
.form-group select:focus, .form-group input:focus {
  border-color: var(--border-focus);
}

.password-wrapper {
  position: relative;
  display: flex;
}
.password-wrapper input {
  flex: 1;
  padding-right: 40px;
}
.password-wrapper button {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

.model-status-indicator {
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 6px;
  background-color: rgba(59, 130, 246, 0.05);
  border-left: 3px solid var(--accent-color);
}

.instruction-box {
  background-color: var(--bg-primary);
  padding: 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
  border: 1px solid var(--border-color);
}

.modal-footer {
  padding: 16px 20px;
  background-color: var(--bg-tertiary);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  border-top: 1px solid var(--border-color);
}

/* Interactive Demos Render Styles */
.demo-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 12px;
  gap: 10px;
  color: #fff;
  font-size: 13px;
}

.demo-canvas-wrapper {
  flex: 1;
  background-color: #0d0f14;
  border-radius: 6px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.demo-canvas-wrapper canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.demo-controls {
  background-color: rgba(255, 255, 255, 0.02);
  border-radius: 6px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1px solid var(--border-color);
}

.control-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.control-row label {
  font-size: 11px;
  color: var(--text-muted);
  min-width: 50px;
}

.control-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent-color);
}

.control-row span {
  font-size: 11px;
  min-width: 35px;
  text-align: right;
  font-family: monospace;
}

.demo-explanation {
  font-size: 11px;
  line-height: 1.4;
  padding: 8px;
  border-radius: 4px;
  background-color: rgba(59, 130, 246, 0.04);
  border-left: 2px solid var(--accent-color);
}

.validation-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
  z-index: 10;
}

.action-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
.btn-small {
  padding: 4px 8px;
  font-size: 11px;
  border-radius: 4px;
}