/* =========================================================
   shapes-panel.css
   Responsibility: Design system tokens, app-level layout,
   ShapesPanel shell dimensions and positioning, DiagramCanvas,
   toolbar, status bar, and shared utility classes.
   Phase Coverage: 1.1
   ========================================================= */

/* ── Design Tokens ──────────────────────────────────────── */
:root {
  /* Background palette */
  --color-bg-app:         #0c0e14;
  --color-bg-panel:       #13161f;
  --color-bg-panel-alt:   #181c28;
  --color-bg-canvas:      #0d1017;

  /* Surface layers */
  --color-surface:        #1a1f2e;
  --color-surface-hover:  #1f2538;
  --color-surface-active: #252d45;

  /* Borders */
  --color-border:         #242a3e;
  --color-border-light:   #2e3650;
  --color-border-focus:   #4f5a80;

  /* Accent — indigo/violet */
  --color-accent:         #6366f1;
  --color-accent-light:   #818cf8;
  --color-accent-dim:     #4f52c5;
  --color-accent-glow:    rgba(99, 102, 241, 0.12);
  --color-accent-glow-md: rgba(99, 102, 241, 0.22);

  /* Text */
  --color-text-primary:   #e2e8f0;
  --color-text-secondary: #8b96b0;
  --color-text-muted:     #4e5872;
  --color-text-accent:    #a5b4fc;

  /* Semantic */
  --color-success:        #10b981;
  --color-warning:        #f59e0b;
  --color-danger:         #ef4444;
  --color-info:           #06b6d4;

  /* Shape category icon colors */
  --color-cat-servers:    #6366f1;
  --color-cat-blocks:     #f59e0b;
  --color-cat-computers:  #06b6d4;
  --color-cat-connectors: #10b981;
  --color-cat-network:    #a78bfa;
  --color-cat-security:   #ef4444;

  /* Dimensions */
  --panel-width:              264px;
  --panel-collapsed-width:    38px;
  --toolbar-height:           46px;
  --statusbar-height:         26px;
  --panel-header-height:      42px;
  --search-wrapper-height:    46px;
  --splitter-height:          6px;

  /* Radii */
  --radius-xs:  3px;
  --radius-sm:  5px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;

  /* Transitions */
  --t-fast:   120ms ease;
  --t-normal: 220ms ease;
  --t-slow:   340ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows — Disabled for Flat/Frameless look */
  --shadow-sm:     none;
  --shadow-md:     none;
  --shadow-lg:     none;
  --shadow-accent: none;
  --shadow-inset:  none;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg-app);
  color: var(--color-text-primary);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── App Root ───────────────────────────────────────────── */
#app-root {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* app-toolbar moved to base.css for M2 */

.toolbar-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 170px;
}

.brand-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.4px;
}

.brand-badge {
  font-size: 9px;
  font-weight: 700;
  background: var(--color-accent-glow-md);
  color: var(--color-accent-light);
  border: 1px solid rgba(99,102,241,0.3);
  padding: 1px 6px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

.toolbar-center {
  display: flex;
  align-items: center;
  gap: 4px;
}

.toolbar-sep {
  width: 1px;
  height: 18px;
  background: var(--color-border);
  margin: 0 4px;
}

.toolbar-actions {
  display: flex;
  gap: 5px;
  min-width: 170px;
  justify-content: flex-end;
}

.toolbar-btn {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: 5px 13px;
  border-radius: var(--radius-xs);
  font-size: 12px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
  line-height: 1;
  display: flex;
  align-items: center;
  gap: 5px;
}

.toolbar-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
  border-color: var(--color-border-light);
}

.toolbar-btn:active {
  background: var(--color-surface-active);
}

.toolbar-btn--active {
  background: var(--color-accent-glow-md);
  color: var(--color-accent-light);
  border-color: rgba(99,102,241,0.35);
}

.toolbar-btn--primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dim) 100%);
  border-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(99,102,241,0.3);
}

.toolbar-btn--primary:hover {
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
  border-color: var(--color-accent-light);
  box-shadow: 0 2px 12px rgba(99,102,241,0.5);
}

/* ── Main Workspace ─────────────────────────────────────── */
#app-workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
  min-height: 0;
}

/* ── Panel Mount ────────────────────────────────────────── */
#shapes-panel-mount {
  flex-shrink: 0;
  display: flex;
  height: 100%;
  position: relative;
}

/* ── ShapesPanel Core ───────────────────────────────────── */
#ShapesPanel {
  width: var(--panel-width);
  height: 100%;
  background: var(--color-bg-panel);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--t-slow);
  position: relative;
  flex-shrink: 0;
  user-select: none;
  box-shadow: 2px 0 12px rgba(0,0,0,0.25);
}

#ShapesPanel.collapsed {
  width: var(--panel-collapsed-width);
}

#ShapesPanel.collapsed .panel-body {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

/* ── Panel Body ─────────────────────────────────────────── */
.panel-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  min-height: 0;
  transition: opacity var(--t-fast), visibility var(--t-fast);
}

/* ── DiagramCanvas ──────────────────────────────────────── */
#MainCanvasViewport {
  flex: 1;
  background-color: var(--color-bg-canvas);
  background-image:
    radial-gradient(circle at 1px 1px, #1c2133 1px, transparent 0);
  background-size: 24px 24px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#canvas-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
  pointer-events: none;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

#canvas-empty-state h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: -0.3px;
}

#canvas-empty-state p {
  font-size: 13px;
  color: var(--color-text-muted);
  max-width: 260px;
  line-height: 1.6;
}

.canvas-hint {
  font-size: 11px;
  color: var(--color-text-muted);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  background: var(--color-surface);
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  letter-spacing: 0.3px;
}

/* ── Canvas Drop Indicator (shown during drag) ──────────── */
#canvas-drop-indicator {
  position: absolute;
  inset: 16px;
  border: 2px dashed var(--color-accent);
  border-radius: var(--radius-lg);
  background: var(--color-accent-glow);
  pointer-events: none;
  animation: dropPulse 1.2s ease-in-out infinite;
}

@keyframes dropPulse {
  0%, 100% { opacity: 0.6; }
  50%       { opacity: 1;   }
}

/* ── Drag Ghost ─────────────────────────────────────────── */
#drag-preview-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
}

/* ── Status Bar ─────────────────────────────────────────── */
#app-status-bar {
  height: var(--statusbar-height);
  background: var(--color-bg-panel);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  font-size: 11px;
  color: var(--color-text-muted);
  gap: 20px;
  flex-shrink: 0;
}

#status-active-category {
  color: var(--color-accent-light);
  font-weight: 500;
}

#status-canvas-info {
  margin-left: auto;
  font-size: 10px;
}

/* ── Utilities ──────────────────────────────────────────── */
.hidden { display: none !important; }

/* Placed canvas items */
.placed-canvas-item {
  transition: transform 0.1s ease;
}

.placed-canvas-item:hover {
  /* Flat/Frameless: No shadow */
}

/* ── Sharp Corner Lockdown ──────────────────────────────── */
rect {
  rx: 0 !important;
  ry: 0 !important;
}