:root {
  --bg-main: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-alt: #334155;
  --border-color: #475569;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-success: #10b981;
  --panel-radius: 8px;
}

[data-theme="light"] {
  --bg-main: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-surface-alt: #e2e8f0;
  --border-color: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  height: 56px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text-main);
}

.brand-badge {
  font-size: 11px;
  background: var(--accent-primary);
  color: white;
  padding: 2px 6px;
  border-radius: 4px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  background-color: var(--bg-surface-alt);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.btn:hover {
  background-color: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

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

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

.playground-layout {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: calc(100vh - 56px);
  overflow: hidden;
}

.pane {
  display: flex;
  flex-direction: column;
  height: 100%;
  border-right: 1px solid var(--border-color);
  background-color: var(--bg-surface);
}

.pane-header {
  height: 44px;
  background-color: var(--bg-surface-alt);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
  font-weight: 600;
}

.editor-wrapper {
  flex: 1;
  position: relative;
}

#bpx-editor {
  width: 100%;
  height: 100%;
  background-color: var(--bg-surface);
  color: var(--text-main);
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 13px;
  padding: 16px;
  border: none;
  outline: none;
  resize: none;
  line-height: 1.5;
}

/* Viewer Toolbar */
.viewer-toolbar {
  height: 42px;
  background-color: var(--bg-surface-alt);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  gap: 8px;
  user-select: none;
  width: 100%;
  flex-shrink: 0;
}

.viewer-toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.viewer-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-right: 4px;
}

.viewer-btn {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 5px 10px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
  line-height: 1;
}

.viewer-btn:hover {
  background-color: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.viewer-btn.active {
  background-color: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.viewer-btn-sm {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
  line-height: 1;
}

.viewer-btn-sm:hover {
  background-color: var(--accent-primary);
  color: white;
}

.viewer-select {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  outline: none;
}

/* In-document Search Panel */
.search-panel {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 8px 14px;
  width: 100%;
  flex-shrink: 0;
  animation: slideDown 0.15s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.search-panel input {
  flex: 1;
  background-color: var(--bg-main);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 5px 10px;
  font-size: 12px;
  outline: none;
}

.search-panel input:focus {
  border-color: var(--accent-primary);
}

.search-counter {
  font-size: 11px;
  color: var(--text-muted);
  min-width: 60px;
  text-align: right;
}

.preview-pane {
  background-color: var(--bg-main);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  overflow: hidden;
  padding: 0;
  position: relative;
}

.preview-pane.fullscreen {
  position: fixed;
  inset: 0;
  z-index: 99999;
  width: 100vw;
  height: 100vh;
}

.preview-scroll-area {
  flex: 1;
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 24px;
  width: 100%;
}

.preview-canvas-wrapper {
  background: white;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
  border-radius: 4px;
  overflow: visible;
  transition: transform 0.15s ease-out;
  transform-origin: top center;
}

.error-banner {
  background-color: #ef4444;
  color: white;
  padding: 8px 16px;
  font-size: 12px;
  display: none;
}

@media (max-width: 900px) {
  .playground-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  .desktop-only {
    display: none !important;
  }
}

@media print {
  @page {
    margin: 0;
  }
  body, html {
    background: white !important;
    color: black !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100% !important;
    height: auto !important;
    overflow: visible !important;
  }
  header, .pane:first-child, .viewer-toolbar, .search-panel, #error-banner {
    display: none !important;
  }
  .playground-layout {
    display: block !important;
    height: auto !important;
    width: 100% !important;
    overflow: visible !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
  }
  .pane {
    border: none !important;
    height: auto !important;
    background: transparent !important;
  }
  .preview-pane {
    display: block !important;
    padding: 0 !important;
    margin: 0 !important;
    background: white !important;
    border: none !important;
    overflow: visible !important;
    width: 100% !important;
    height: auto !important;
  }
  .preview-scroll-area {
    display: block !important;
    padding: 0 !important;
    margin: 0 !important;
    overflow: visible !important;
    width: 100% !important;
    height: auto !important;
  }
  .preview-canvas-wrapper {
    box-shadow: none !important;
    transform: none !important;
    margin: 0 auto !important;
    border: none !important;
    background: transparent !important;
  }
  .bangplanix-report-svg {
    display: block !important;
    margin: 0 auto !important;
    box-shadow: none !important;
  }
}