/**
 * JsCAD - Main Core CSS & Design System
 * Dark CAD theme, charcoal hues, reset & layout
 */

:root {
  --acad-bg-darkest: #14171a;
  --acad-bg-dark: #1e2126;
  --acad-bg-panel: #282c34;
  --acad-bg-hover: #353b45;
  --acad-bg-active: #404854;
  --acad-border: #3e4451;
  --acad-border-light: #4b5263;

  --acad-red: #d32f2f;
  --acad-red-hover: #e53935;
  --acad-blue: #0078d7;
  --acad-blue-hover: #1084e3;
  --acad-cyan: #00e5ff;
  --acad-green: #00e676;
  --acad-amber: #f59e0b;

  --acad-text: #abb2bf;
  --acad-text-bright: #ffffff;
  --acad-text-dim: #707886;

  --acad-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --acad-font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;

  --app-bar-height: 38px;
  /* Tabs (26px) + panels: three 22px button rows, panel title and padding (94px) + scrollbar room (8px) */
  --ribbon-height: 128px;
  --cmd-bar-height: 90px;
  --status-bar-height: 28px;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--acad-bg-darkest);
  color: var(--acad-text);
  font-family: var(--acad-font);
  font-size: 12px;
}

#app-container {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--acad-bg-darkest);
}
::-webkit-scrollbar-thumb {
  background: var(--acad-border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--acad-border-light);
}

/* Application Top Bar */
#app-header {
  height: var(--app-bar-height);
  background: var(--acad-bg-darkest);
  border-bottom: 1px solid var(--acad-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  flex-shrink: 0;
  z-index: 100;
}

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

.acad-logo-btn {
  background: var(--acad-red);
  color: #ffffff;
  border: none;
  width: 26px;
  height: 26px;
  border-radius: 3px;
  font-weight: 900;
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.5);
  transition: background 0.15s;
}

.acad-logo-btn:hover {
  background: var(--acad-red-hover);
}

.app-title-box {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--acad-text-bright);
}

.drawing-badge {
  background: #1b1e23;
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid var(--acad-border);
  color: var(--acad-cyan);
  font-size: 11px;
}

/* Quick Access Toolbar */
.quick-access-bar {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 12px;
  border-left: 1px solid var(--acad-border);
  padding-left: 8px;
}

.qa-btn {
  background: transparent;
  border: none;
  color: var(--acad-text);
  padding: 4px 6px;
  border-radius: 2px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qa-btn:hover {
  background: var(--acad-bg-hover);
  color: var(--acad-text-bright);
}

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

.top-action-btn {
  background: transparent;
  border: 1px solid var(--acad-border);
  color: var(--acad-text);
  padding: 3px 8px;
  border-radius: 3px;
  cursor: pointer;
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.top-action-btn:hover {
  background: var(--acad-bg-hover);
  color: var(--acad-text-bright);
  border-color: var(--acad-border-light);
}

/* Workspace Canvas Viewport Area */
#workspace-area {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: var(--acad-bg-dark);
}

#canvas-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

canvas {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
}

#cad-overlay {
  pointer-events: auto;
  cursor: crosshair;
}

/* Clean Screen Mode (Ctrl+0) */
body.clean-screen-mode #ribbon-container {
  display: none !important;
}
body.clean-screen-mode #app-header {
  display: none !important;
}
body.clean-screen-mode #cmd-bar {
  bottom: 0px !important;
}

/* Text for screen readers and search engines only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}