/* ============================================
   Mind Flow - Global Styles & Design Tokens
   ============================================ */

:root {
  /* Color palette */
  --bg-primary: #0f0f14;
  --bg-secondary: #1a1a24;
  --bg-tertiary: #24243a;
  --bg-surface: #2d2d44;
  --bg-hover: #36365a;

  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b8a;

  --accent-primary: #6C5CE7;
  --accent-primary-hover: #7f70f0;
  --accent-secondary: #00B894;
  --accent-tertiary: #FDCB6E;
  --accent-danger: #E17055;

  --node-bg: #1e1e30;
  --node-bg-hover: #28283f;
  --node-border: #3a3a5c;
  --node-border-selected: #6C5CE7;
  --node-shadow: rgba(108, 92, 231, 0.15);

  --connection-color: #4a4a6a;
  --connection-color-hover: #6C5CE7;

  /* Spacing */
  --layout-h-gap: 80;
  --layout-v-gap: 20;
  --node-padding-h: 16;
  --node-padding-v: 10;
  --node-min-width: 80;
  --node-max-width: 300;
  --toolbar-height: 48px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 14px;
  --font-size-sm: 12px;
  --font-size-lg: 16px;

  /* Borders & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index layers */
  --z-connections: 1;
  --z-nodes: 2;
  --z-node-editing: 10;
  --z-collapse-btn: 5;
  --z-box-selection: 50;
  --z-toolbar: 100;
  --z-style-toolbar: 90;
  --z-minimap: 80;
  --z-zoom-controls: 80;
  --z-toast: 200;
  --z-export-menu: 110;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  user-select: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--bg-hover);
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-surface);
  color: var(--text-primary);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  z-index: var(--z-toast);
  opacity: 0;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  border: 1px solid var(--node-border);
  pointer-events: none;
}
.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.hidden {
  display: none;
}

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