:root {
  --bg-color: #0d1117;
  --panel-bg: rgba(22, 27, 34, 0.7);
  --border-color: rgba(48, 54, 61, 0.8);
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --primary-color: #2ea043; /* Terminal green vibe */
  --primary-hover: #3fb950;
  --accent-color: #1f6feb;
  --canvas-bg: #010409;
  --grid-color: rgba(48, 54, 61, 0.3);
  
  --shape-fill: #161b22;
  --shape-stroke: #3fb950;
  --selection-color: #58a6ff;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  user-select: none;
}

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

/* Glassmorphism utilities */
.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  z-index: 10;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--primary-color);
}

.tools-group, .controls-group, .actions-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0,0,0,0.2);
  padding: 0.25rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.05);
}

.tool-btn, .icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.tool-btn:hover, .icon-btn:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-main);
}

.tool-btn.active {
  background: var(--primary-color);
  color: #fff;
}

/* Controls */
#zoom-level {
  font-size: 0.85rem;
  min-width: 48px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Buttons */
.primary-btn, .secondary-btn {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

.primary-btn {
  background: var(--primary-color);
  color: #fff;
}

.primary-btn:hover {
  background: var(--primary-hover);
}

.secondary-btn {
  background: rgba(255,255,255,0.1);
  color: var(--text-main);
  border: 1px solid rgba(255,255,255,0.1);
}

.secondary-btn:hover {
  background: rgba(255,255,255,0.15);
}

.dropdown {
  background: rgba(0,0,0,0.5);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.5rem;
  border-radius: 6px;
  font-size: 0.85rem;
  outline: none;
}

/* Workspace */
.workspace {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: var(--canvas-bg);
  background-image: 
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: center center;
}

.canvas-container {
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

canvas {
  display: block;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal.hidden {
  opacity: 0;
  visibility: hidden;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: -1;
}

.modal-content {
  width: 90%;
  max-width: 900px;
  height: 80vh;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  transform: translateY(0);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.hidden .modal-content {
  transform: translateY(20px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.2rem;
  font-weight: 500;
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.modal-body {
  flex: 1;
  padding: 1.5rem;
  background: #000;
}

#ascii-output {
  width: 100%;
  height: 100%;
  background: transparent;
  color: var(--primary-color);
  font-family: 'Fira Code', monospace;
  font-size: 14px;
  line-height: 1.2;
  border: none;
  resize: none;
  outline: none;
  white-space: pre;
  overflow: auto;
}