/* web-cad v6 – Design Tokens, Typography, Base (with Drawer tokens) */
:root {
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', ui-monospace, monospace;

  --fs-xs: 11px;
  --fs-sm: 12px;
  --fs-md: 13px;
  --fs-lg: 14px;
  --fs-xl: 16px;
  --fs-2xl: 20px;

  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-primary-50: #eff6ff;

  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-2: #f1f5f9;
  --color-surface-3: #e2e8f0;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;

  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-faint: #94a3b8;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-ki: #8b5cf6;
  --color-ki-light: #ede9fe;

  --color-canvas-bg: #0f172a;
  --color-canvas-bg-2: #1e293b;
  --color-grid-minor: rgba(255,255,255,0.06);
  --color-grid-major: rgba(255,255,255,0.12);
  --color-grid-axis: rgba(96,165,250,0.28);
  --color-online: #10b981;

  --radius-xs: 3px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;

  --spacing-xs: 4px;
  --spacing-sm: 6px;
  --spacing-md: 10px;
  --spacing-lg: 14px;
  --spacing-xl: 20px;

  /* Layout */
  --topbar-h: 38px;
  --ribbon-h: 72px;
  --leftbar-w: 200px;
  --rightbar-w: 300px;
  --cmdline-h: 56px;
  --status-h: 26px;
  --canvas-toolbar-h: 38px;

  /* Mobile-specific */
  --mobile-right-tab-w: 56px;
  --mobile-topbar-h: 44px;
  --mobile-ribbon-h: 48px;
  --drawer-w: min(320px, 88vw);

  --shadow-sm: 0 1px 2px 0 rgba(15,23,42,0.04);
  --shadow-md: 0 2px 6px -1px rgba(15,23,42,0.08), 0 1px 3px -1px rgba(15,23,42,0.06);
  --shadow-lg: 0 10px 20px -4px rgba(15,23,42,0.10), 0 4px 8px -2px rgba(15,23,42,0.06);
  --shadow-drawer: -8px 0 24px -4px rgba(15,23,42,0.18);

  --t-fast: 120ms cubic-bezier(.2,.0,.2,1);
  --t-base: 200ms cubic-bezier(.2,.0,.2,1);
  --t-drawer: 280ms cubic-bezier(.32, .72, 0, 1);
}

[data-theme="dark"] {
  --color-bg: #0b0e14;
  --color-surface: #11151c;
  --color-surface-2: #161b24;
  --color-surface-3: #1d2330;
  --color-border: #232a36;
  --color-border-strong: #2f3849;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-faint: #64748b;
  --color-primary-light: #1e3a8a;
  --color-primary-50: #172554;
  --color-ki-light: #2e1065;
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.3);
  --shadow-md: 0 2px 6px -1px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 20px -4px rgba(0,0,0,0.5);
  --shadow-drawer: -8px 0 24px -4px rgba(0,0,0,0.6);
}

* { box-sizing: border-box; }
*::before, *::after { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  overflow: hidden;
  /* iOS safe areas */
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

body {
  position: fixed;
  inset: 0;
  width: 100%;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  background: transparent;
  border: none;
  color: inherit;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 10px;
  border: 2px solid var(--color-bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-text-faint); }

*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.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;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--color-primary);
  color: white;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  z-index: 1000;
  font-weight: 500;
}
.skip-link:focus { top: 8px; }

/* Scrim (drawer backdrop) */
.scrim {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-drawer), visibility 0s linear var(--t-drawer);
}
.scrim.show {
  opacity: 1;
  visibility: visible;
  transition: opacity var(--t-drawer), visibility 0s linear 0s;
}