:root {
  --bg-primary: #111111;
  --bg-secondary: #1d1d1d;
  --bg-tertiary: #2d2d2d;
  --border-color: #333333;
  --text-primary: #f0f0f0;
  --text-secondary: #aaaaaa;
  --accent-blue: #3b82f6;
  --accent-blue-hover: #2563eb;
  --sidebar-width: 320px;
  --border-radius: 4px;
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

.app-layout {
  display: flex;
  height: 100vh;
}

/* Sidebar Styling */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 2px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  padding: 1.5rem;
  overflow-y: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 2rem;
}

.home-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
}

.home-link:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.sidebar-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.sidebar-section {
  margin-bottom: 2rem;
}

.section-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

/* Form Elements */
.code-input {
  width: 100%;
  height: 120px;
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-family: 'Fira Code', monospace;
  font-size: 0.8rem;
  padding: 0.75rem;
  resize: vertical;
  transition: border-color 0.2s;
}

.code-input:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.file-input {
  display: none;
}

.file-upload-wrapper {
  margin-top: 0.5rem;
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  gap: 8px;
}

.button-primary {
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
  color: white;
}

.button-primary:hover {
  background-color: var(--accent-blue-hover);
  border-color: var(--accent-blue-hover);
}

.button-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.button-secondary:hover {
  background-color: #3d3d3d;
  border-color: #444;
}

.button-tertiary {
  background-color: transparent;
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
}

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

.full-width {
  width: 100%;
}

/* Control Grid */
.control-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 1rem;
}

.pan-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.pan-mid {
  display: flex;
  gap: 4px;
}

/* Info Section */
.info-section {
  padding-top: 1.5rem;
  border-top: 2px solid var(--border-color);
}

.stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.stat-value {
  font-family: 'Fira Code', monospace;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-blue);
}

.hotkeys-guide {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.hotkeys-guide kbd {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1px 4px;
  font-size: 0.7rem;
  font-family: 'Fira Code', monospace;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 1.5rem;
}

/* Viewer Area */
.viewer-area {
  flex: 1;
  position: relative;
  background-color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.viewer-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.placeholder {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-secondary);
}

.placeholder-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  max-width: 240px;
}

.svg-viewer {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  cursor: grab;
}

.svg-viewer:active {
  cursor: grabbing;
}

.svg-content {
  position: absolute;
  display: inline-block;
  transform-origin: center center;
}

.svg-content svg {
  display: block;
  max-width: none;
  max-height: none;
}