@layer base {
/* _global.css — TurboFlows Design Tokens (HEY Calm + Fizzy Vibrant) */

:root {
  /* ─── Spacing Scale ─── */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Legacy spacing aliases */
  --space-inline: var(--space-4);
  --space-block: var(--space-4);
  --space-inline-half: var(--space-2);
  --space-block-half: var(--space-2);
  --space-inline-double: var(--space-8);
  --space-block-double: var(--space-8);

  /* ─── Typography ─── */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;

  /* ─── OKLCH Palette — Blue-Tinted Neutrals (Light Mode) ─── */
  --color-ink:           oklch(0.20 0.02 245);
  --color-ink-subtle:    oklch(0.40 0.01 245);
  --color-ink-muted:     oklch(0.60 0.01 245);
  --color-canvas:        oklch(0.985 0.003 245);
  --color-canvas-alt:    oklch(0.965 0.007 245);
  --color-canvas-raised: oklch(1.0 0 0);
  --color-border:        oklch(0.89 0.015 245);
  --color-border-strong: oklch(0.78 0.02 245);

  /* ─── Accents ─── */
  --color-primary:       oklch(0.55 0.20 250);
  --color-primary-hover: oklch(0.48 0.22 250);
  --color-primary-soft:  oklch(0.93 0.04 250);
  --color-negative:      oklch(0.55 0.22 25);
  --color-positive:      oklch(0.60 0.19 145);
  --color-warning:       oklch(0.70 0.17 80);

  /* Legacy alias */
  --color-link: var(--color-primary);

  /* ─── Step Type Hues ─── */
  --hue-question: 250;
  --hue-action:   145;
  --hue-message:  290;
  --hue-escalate:  25;
  --hue-resolve:  160;
  --hue-subflow:  310;

  /* Legacy step color aliases */
  --color-step-question: var(--hue-question);
  --color-step-action:   var(--hue-action);
  --color-step-message:  var(--hue-message);
  --color-step-escalate: var(--hue-escalate);
  --color-step-resolve:  var(--hue-resolve);
  --color-step-subflow:  var(--hue-subflow);

  /* ─── Composable Step Colors ─── */
  --step-bg:     oklch(0.95 0.04 var(--step-hue));
  --step-border: oklch(0.80 0.10 var(--step-hue));
  --step-text:   oklch(0.35 0.15 var(--step-hue));
  --step-dot:    oklch(0.60 0.20 var(--step-hue));

  /* ─── Shadows (Dual-Layer) ─── */
  --shadow-sm: 0 1px 2px oklch(0.25 0.02 245 / 0.05), 0 1px 1px oklch(0.25 0.02 245 / 0.03);
  --shadow:    0 2px 6px oklch(0.25 0.02 245 / 0.07), 0 1px 2px oklch(0.25 0.02 245 / 0.04);
  --shadow-lg: 0 4px 16px oklch(0.25 0.02 245 / 0.10), 0 2px 4px oklch(0.25 0.02 245 / 0.05);
  --shadow-xl: 0 8px 32px oklch(0.25 0.02 245 / 0.12), 0 4px 8px oklch(0.25 0.02 245 / 0.06);

  /* ─── Borders & Radii ─── */
  --radius-sm:   0.25rem;
  --radius:      0.5rem;
  --radius-md:   0.625rem;   /* interactive elements: buttons, inputs */
  --radius-lg:   0.75rem;
  --radius-xl:   1rem;
  --radius-full: 9999px;

  /* ─── Focus ─── */
  --focus-ring: 2px solid var(--color-primary);
  --focus-ring-offset: 2px;

  /* ─── Motion ─── */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-snap:   120ms;
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* ─── Z-Index ─── */
  --z-dropdown: 10;
  --z-nav: 20;
  --z-modal: 30;
  --z-tooltip: 40;
  --z-toast: 50;
}

/* ─── Dark Mode ─── */
[data-theme="dark"] {
  color-scheme: dark;
  --color-ink:           oklch(0.92 0.01 245);
  --color-ink-subtle:    oklch(0.72 0.01 245);
  --color-ink-muted:     oklch(0.50 0.01 245);
  --color-canvas:        oklch(0.13 0.015 245);
  --color-canvas-alt:    oklch(0.16 0.012 245);
  --color-canvas-raised: oklch(0.19 0.01 245);
  --color-border:        oklch(0.26 0.015 245);
  --color-border-strong: oklch(0.35 0.02 245);
  --color-primary:       oklch(0.70 0.18 250);
  --color-primary-hover: oklch(0.76 0.16 250);
  --color-primary-soft:  oklch(0.25 0.06 250);
  --color-negative:      oklch(0.70 0.18 25);
  --color-positive:      oklch(0.70 0.16 145);
  --color-warning:       oklch(0.75 0.15 80);
  --shadow-sm: 0 1px 2px oklch(0.05 0.02 245 / 0.20), 0 1px 1px oklch(0.05 0.02 245 / 0.12);
  --shadow:    0 2px 6px oklch(0.05 0.02 245 / 0.28), 0 1px 2px oklch(0.05 0.02 245 / 0.16);
  --shadow-lg: 0 4px 16px oklch(0.05 0.02 245 / 0.40), 0 2px 4px oklch(0.05 0.02 245 / 0.20);
  --shadow-xl: 0 8px 32px oklch(0.05 0.02 245 / 0.48), 0 4px 8px oklch(0.05 0.02 245 / 0.24);
}


/* ─── System Preference Fallback ─── */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --color-ink:           oklch(0.92 0.01 245);
    --color-ink-subtle:    oklch(0.72 0.01 245);
    --color-ink-muted:     oklch(0.50 0.01 245);
    --color-canvas:        oklch(0.13 0.015 245);
    --color-canvas-alt:    oklch(0.16 0.012 245);
    --color-canvas-raised: oklch(0.19 0.01 245);
    --color-border:        oklch(0.26 0.015 245);
    --color-border-strong: oklch(0.35 0.02 245);
    --color-primary:       oklch(0.70 0.18 250);
    --color-primary-hover: oklch(0.76 0.16 250);
    --color-primary-soft:  oklch(0.25 0.06 250);
    --color-negative:      oklch(0.70 0.18 25);
    --color-positive:      oklch(0.70 0.16 145);
    --color-warning:       oklch(0.75 0.15 80);
    --shadow-sm: 0 1px 2px oklch(0.05 0.02 245 / 0.20), 0 1px 1px oklch(0.05 0.02 245 / 0.12);
    --shadow:    0 2px 6px oklch(0.05 0.02 245 / 0.28), 0 1px 2px oklch(0.05 0.02 245 / 0.16);
    --shadow-lg: 0 4px 16px oklch(0.05 0.02 245 / 0.40), 0 2px 4px oklch(0.05 0.02 245 / 0.20);
    --shadow-xl: 0 8px 32px oklch(0.05 0.02 245 / 0.48), 0 4px 8px oklch(0.05 0.02 245 / 0.24);
  }
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
  }
}

/* ─── Keyboard Shortcut Hints ─── */
kbd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 0.1rem 0.35rem;
  background: var(--color-canvas-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 var(--color-border-strong);
  line-height: 1.4;
  vertical-align: middle;
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  :root {
    --ease-spring: ease;
    --ease-out: ease;
    --ease-in-out: ease;
    --duration-snap: 0ms;
    --duration-fast: 0ms;
    --duration-normal: 0ms;
    --duration-slow: 0ms;
  }
}
}

/* ─── Lexxy Rich Text Editor Dark Mode (html[] beats Lexxy's :root specificity) ─── */
html[data-theme="dark"] {
  --lexxy-color-ink:          oklch(0.92 0.01 245);
  --lexxy-color-ink-medium:   oklch(0.65 0.01 245);
  --lexxy-color-ink-light:    oklch(0.50 0.01 245);
  --lexxy-color-ink-lighter:  oklch(0.30 0.015 245);
  --lexxy-color-ink-lightest: oklch(0.22 0.01 245);
  --lexxy-color-ink-inverted: oklch(0.13 0.015 245);
  --lexxy-color-canvas:       oklch(0.19 0.01 245);
  --lexxy-color-text:         oklch(0.92 0.01 245);
  --lexxy-color-text-subtle:  oklch(0.65 0.01 245);
  --lexxy-color-accent-dark:  oklch(0.70 0.18 250);
  --lexxy-color-accent-medium:oklch(0.60 0.16 250);
  --lexxy-color-accent-light: oklch(0.30 0.06 250);
  --lexxy-color-accent-lightest: oklch(0.25 0.04 250);
  --lexxy-color-link:         oklch(0.70 0.18 250);
  --lexxy-color-selected:     oklch(0.25 0.04 250);
  --lexxy-color-selected-hover: oklch(0.30 0.06 250);
  --lexxy-color-selected-dark:oklch(0.60 0.16 250);
  --lexxy-color-code-bg:      oklch(0.16 0.012 245);
  --lexxy-color-table-header-bg: oklch(0.22 0.01 245);
  --lexxy-color-table-cell-border: oklch(0.30 0.015 245);
  --lexxy-shadow: 0 2px 8px oklch(0.05 0.02 245 / 0.40);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --lexxy-color-ink:          oklch(0.92 0.01 245);
    --lexxy-color-ink-medium:   oklch(0.65 0.01 245);
    --lexxy-color-ink-light:    oklch(0.50 0.01 245);
    --lexxy-color-ink-lighter:  oklch(0.30 0.015 245);
    --lexxy-color-ink-lightest: oklch(0.22 0.01 245);
    --lexxy-color-ink-inverted: oklch(0.13 0.015 245);
    --lexxy-color-canvas:       oklch(0.19 0.01 245);
    --lexxy-color-text:         oklch(0.92 0.01 245);
    --lexxy-color-text-subtle:  oklch(0.65 0.01 245);
    --lexxy-color-accent-dark:  oklch(0.70 0.18 250);
    --lexxy-color-accent-medium:oklch(0.60 0.16 250);
    --lexxy-color-accent-light: oklch(0.30 0.06 250);
    --lexxy-color-accent-lightest: oklch(0.25 0.04 250);
    --lexxy-color-link:         oklch(0.70 0.18 250);
    --lexxy-color-selected:     oklch(0.25 0.04 250);
    --lexxy-color-selected-hover: oklch(0.30 0.06 250);
    --lexxy-color-selected-dark:oklch(0.60 0.16 250);
    --lexxy-color-code-bg:      oklch(0.16 0.012 245);
    --lexxy-color-table-header-bg: oklch(0.22 0.01 245);
    --lexxy-color-table-cell-border: oklch(0.30 0.015 245);
    --lexxy-shadow: 0 2px 8px oklch(0.05 0.02 245 / 0.40);
  }
}