/* =========================================================================
   ZohoSync — Design tokens
   Style: Soft UI Evolution (Apple-inspired depth, WCAG AA+ contrast)
   Palette: blue data + amber highlight  |  Type: Fira Sans / Fira Code
   Density: dashboard (8–32px scale)
   ========================================================================= */

:root {
  /* --- Brand ramp ------------------------------------------------------ */
  --blue-50:  #EFF6FF;
  --blue-100: #DBEAFE;
  --blue-200: #BFDBFE;
  --blue-300: #93C5FD;
  --blue-400: #60A5FA;
  --blue-500: #3B82F6;
  --blue-600: #2563EB;
  --blue-700: #1D4ED8;
  --blue-800: #1E40AF;
  --blue-900: #1E3A8A;
  --blue-950: #172554;

  --amber-400: #FBBF24;
  --amber-500: #F59E0B;
  --amber-600: #D97706;
  --amber-700: #B45309;

  --green-500: #10B981;
  --green-600: #059669;
  --green-700: #047857;

  --red-500: #EF4444;
  --red-600: #DC2626;
  --red-700: #B91C1C;

  --slate-50:  #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-300: #CBD5E1;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1E293B;
  --slate-900: #0F172A;
  --slate-950: #020617;

  /* --- Semantic (light) ------------------------------------------------ */
  --color-primary: var(--blue-800);
  --color-primary-hover: var(--blue-700);
  --color-primary-soft: var(--blue-50);
  --color-on-primary: #FFFFFF;
  --color-secondary: var(--blue-500);
  --color-accent: var(--amber-600);
  --color-accent-soft: #FEF3C7;

  --color-bg: #F5F7FB;
  --color-bg-alt: #EDF1F8;
  --color-surface: #FFFFFF;
  --color-surface-raised: #FFFFFF;
  --color-surface-sunken: var(--slate-50);
  --color-overlay: rgba(15, 23, 42, 0.45);

  --color-text: #16213E;
  --color-text-muted: #5A6784;
  --color-text-subtle: #7C889F;
  --color-text-inverse: #FFFFFF;

  --color-border: #DEE5F0;
  --color-border-strong: #C4CFE2;
  --color-ring: var(--blue-600);

  --color-success: var(--green-600);
  --color-success-soft: #ECFDF5;
  --color-warning: var(--amber-600);
  --color-warning-soft: #FFFBEB;
  --color-danger: var(--red-600);
  --color-danger-soft: #FEF2F2;
  --color-info: var(--blue-600);
  --color-info-soft: var(--blue-50);
  --color-neutral: var(--slate-500);
  --color-neutral-soft: var(--slate-100);

  /* Glass surfaces (nav, sticky headers, popovers) */
  --glass-bg: rgba(255, 255, 255, 0.78);
  --glass-border: rgba(255, 255, 255, 0.6);
  --glass-blur: saturate(180%) blur(20px);

  --sidebar-bg: #FFFFFF;
  --sidebar-text: #46536E;
  --sidebar-text-active: var(--blue-800);
  --sidebar-active-bg: var(--blue-50);

  /* --- Typography ------------------------------------------------------ */
  --font-sans: "Fira Sans", -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Fira Code", ui-monospace, SFMono-Regular, "SF Mono", Menlo,
               Consolas, "Liberation Mono", monospace;

  --text-2xs: 0.6875rem;  /* 11px */
  --text-xs:  0.75rem;    /* 12px */
  --text-sm:  0.8125rem;  /* 13px */
  --text-base: 0.875rem;  /* 14px — dashboard body size */
  --text-md:  0.9375rem;  /* 15px */
  --text-lg:  1.0625rem;  /* 17px */
  --text-xl:  1.25rem;    /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: clamp(1.625rem, 1.2rem + 1.4vw, 2.125rem);
  --text-4xl: clamp(2rem, 1.4rem + 2.4vw, 3rem);

  --leading-tight: 1.2;
  --leading-snug: 1.4;
  --leading-normal: 1.55;
  --leading-relaxed: 1.7;

  --tracking-tight: -0.02em;
  --tracking-snug: -0.011em;
  --tracking-wide: 0.02em;
  --tracking-caps: 0.06em;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* --- Spacing (dense / dashboard) ------------------------------------- */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4  */
  --space-2: 0.5rem;    /* 8  */
  --space-3: 0.75rem;   /* 12 */
  --space-4: 1rem;      /* 16 */
  --space-5: 1.25rem;   /* 20 */
  --space-6: 1.5rem;    /* 24 */
  --space-8: 2rem;      /* 32 */
  --space-10: 2.5rem;   /* 40 */
  --space-12: 3rem;     /* 48 */
  --space-16: 4rem;     /* 64 */

  /* --- Radius ---------------------------------------------------------- */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-2xl: 24px;
  --radius-pill: 980px;

  /* --- Elevation — layered, soft, never muddy -------------------------- */
  --shadow-xs: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.06),
               0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.07),
               0 2px 4px rgba(16, 24, 40, 0.04);
  --shadow-lg: 0 12px 28px rgba(16, 24, 40, 0.09),
               0 4px 10px rgba(16, 24, 40, 0.05);
  --shadow-xl: 0 24px 48px rgba(16, 24, 40, 0.14),
               0 8px 16px rgba(16, 24, 40, 0.06);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.7);
  --shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.28);

  /* --- Motion ---------------------------------------------------------- */
  --duration-instant: 100ms;
  --duration-fast: 160ms;
  --duration-base: 240ms;
  --duration-slow: 380ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* --- Layout ---------------------------------------------------------- */
  --sidebar-width: 248px;
  --sidebar-width-collapsed: 68px;
  --topbar-height: 60px;
  --content-max: 1440px;
  --z-sidebar: 40;
  --z-topbar: 50;
  --z-dropdown: 60;
  --z-modal: 80;
  --z-toast: 90;
}

/* =========================================================================
   Dark mode
   Defined for both the explicit toggle and the system preference so a page
   never half-renders in the wrong theme.
   ========================================================================= */
:root[data-theme="dark"] {
  --color-primary: var(--blue-500);
  --color-primary-hover: var(--blue-400);
  --color-primary-soft: rgba(59, 130, 246, 0.14);
  --color-on-primary: #06122B;
  --color-secondary: var(--blue-400);
  --color-accent: var(--amber-500);
  --color-accent-soft: rgba(245, 158, 11, 0.16);

  --color-bg: #0A0F1C;
  --color-bg-alt: #070B15;
  --color-surface: #121A2B;
  --color-surface-raised: #162034;
  --color-surface-sunken: #0D1422;
  --color-overlay: rgba(2, 6, 23, 0.68);

  --color-text: #E8EDF7;
  --color-text-muted: #9DAAC4;
  --color-text-subtle: #75839F;
  --color-text-inverse: #0A0F1C;

  --color-border: #23304A;
  --color-border-strong: #334363;
  --color-ring: var(--blue-400);

  --color-success: #34D399;
  --color-success-soft: rgba(16, 185, 129, 0.14);
  --color-warning: var(--amber-400);
  --color-warning-soft: rgba(245, 158, 11, 0.14);
  --color-danger: #F87171;
  --color-danger-soft: rgba(239, 68, 68, 0.14);
  --color-info: var(--blue-400);
  --color-info-soft: rgba(59, 130, 246, 0.14);
  --color-neutral: var(--slate-400);
  --color-neutral-soft: rgba(148, 163, 184, 0.14);

  --glass-bg: rgba(18, 26, 43, 0.76);
  --glass-border: rgba(255, 255, 255, 0.08);

  --sidebar-bg: #0E1626;
  --sidebar-text: #96A3BD;
  --sidebar-text-active: #E8EDF7;
  --sidebar-active-bg: rgba(59, 130, 246, 0.16);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45), 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45), 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 14px 32px rgba(0, 0, 0, 0.5), 0 4px 10px rgba(0, 0, 0, 0.35);
  --shadow-xl: 0 28px 56px rgba(0, 0, 0, 0.58), 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  --shadow-focus: 0 0 0 3px rgba(96, 165, 250, 0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-primary: var(--blue-500);
    --color-primary-hover: var(--blue-400);
    --color-primary-soft: rgba(59, 130, 246, 0.14);
    --color-on-primary: #06122B;
    --color-secondary: var(--blue-400);
    --color-accent: var(--amber-500);
    --color-accent-soft: rgba(245, 158, 11, 0.16);

    --color-bg: #0A0F1C;
    --color-bg-alt: #070B15;
    --color-surface: #121A2B;
    --color-surface-raised: #162034;
    --color-surface-sunken: #0D1422;
    --color-overlay: rgba(2, 6, 23, 0.68);

    --color-text: #E8EDF7;
    --color-text-muted: #9DAAC4;
    --color-text-subtle: #75839F;
    --color-text-inverse: #0A0F1C;

    --color-border: #23304A;
    --color-border-strong: #334363;
    --color-ring: var(--blue-400);

    --color-success: #34D399;
    --color-success-soft: rgba(16, 185, 129, 0.14);
    --color-warning: var(--amber-400);
    --color-warning-soft: rgba(245, 158, 11, 0.14);
    --color-danger: #F87171;
    --color-danger-soft: rgba(239, 68, 68, 0.14);
    --color-info: var(--blue-400);
    --color-info-soft: rgba(59, 130, 246, 0.14);
    --color-neutral: var(--slate-400);
    --color-neutral-soft: rgba(148, 163, 184, 0.14);

    --glass-bg: rgba(18, 26, 43, 0.76);
    --glass-border: rgba(255, 255, 255, 0.08);

    --sidebar-bg: #0E1626;
    --sidebar-text: #96A3BD;
    --sidebar-text-active: #E8EDF7;
    --sidebar-active-bg: rgba(59, 130, 246, 0.16);

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45), 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 14px 32px rgba(0, 0, 0, 0.5), 0 4px 10px rgba(0, 0, 0, 0.35);
    --shadow-xl: 0 28px 56px rgba(0, 0, 0, 0.58), 0 8px 16px rgba(0, 0, 0, 0.4);
    --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.05);
    --shadow-focus: 0 0 0 3px rgba(96, 165, 250, 0.35);
  }
}