/* =========================================================
   UTurn Digital Solutions — Design Tokens
   Brand foundation refined for premium digital agency use
   Primary blues derived from existing logo & theme (#2575fc, #00c8e0)
   ========================================================= */
:root {
  /* Brand — from existing identity */
  --brand-blue: #1B7AF8;
  --brand-blue-deep: #0B5ED7;
  --brand-blue-soft: #3D93FF;
  --brand-cyan: #00C4E0;
  --brand-cyan-deep: #00A8C2;
  --brand-gradient: linear-gradient(135deg, #1B7AF8 0%, #00C4E0 100%);
  --brand-gradient-soft: linear-gradient(135deg, rgba(27,122,248,0.12), rgba(0,196,224,0.08));

  /* Neutrals — dark slate system */
  --ink-950: #0B1220;
  --ink-900: #0F172A;
  --ink-800: #1E293B;
  --ink-700: #334155;
  --ink-600: #475569;
  --ink-500: #64748B;
  --ink-400: #94A3B8;
  --ink-300: #CBD5E1;
  --ink-200: #E2E8F0;
  --ink-100: #F1F5F9;
  --ink-50: #F8FAFC;
  --white: #FFFFFF;

  /* Semantic */
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --info: var(--brand-blue);

  /* Surfaces */
  --bg: var(--ink-50);
  --bg-elevated: var(--white);
  --bg-muted: var(--ink-100);
  --bg-dark: var(--ink-900);
  --bg-darker: var(--ink-950);
  --surface: var(--white);
  --surface-2: var(--ink-50);
  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);
  --border-dark: rgba(255, 255, 255, 0.1);

  /* Text */
  --text: var(--ink-900);
  --text-secondary: var(--ink-600);
  --text-muted: var(--ink-500);
  --text-inverse: var(--white);
  --text-inverse-muted: rgba(255, 255, 255, 0.72);

  /* Typography */
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --fs-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8125rem);
  --fs-sm: clamp(0.875rem, 0.82rem + 0.25vw, 0.9375rem);
  --fs-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --fs-md: clamp(1.0625rem, 1rem + 0.3vw, 1.125rem);
  --fs-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.25rem);
  --fs-xl: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
  --fs-2xl: clamp(1.5rem, 1.25rem + 1vw, 1.875rem);
  --fs-3xl: clamp(1.875rem, 1.5rem + 1.5vw, 2.5rem);
  --fs-4xl: clamp(2.25rem, 1.75rem + 2vw, 3.25rem);
  --fs-5xl: clamp(2.75rem, 2rem + 2.8vw, 4rem);
  --lh-tight: 1.15;
  --lh-snug: 1.3;
  --lh-normal: 1.6;
  --lh-relaxed: 1.75;
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;
  --tracking-tight: -0.03em;
  --tracking-snug: -0.02em;
  --tracking-wide: 0.04em;
  --tracking-wider: 0.08em;

  /* Spacing scale */
  --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;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --container: 1200px;
  --container-narrow: 760px;
  --container-wide: 1320px;
  --gutter: clamp(1rem, 3vw, 1.75rem);
  --header-h: 72px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 0 1px rgba(27, 122, 248, 0.12), 0 8px 32px rgba(27, 122, 248, 0.18);
  --shadow-glow-cyan: 0 0 40px rgba(0, 196, 224, 0.25);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --duration-fast: 150ms;
  --duration: 250ms;
  --duration-slow: 450ms;

  /* Focus */
  --focus-ring: 0 0 0 3px rgba(27, 122, 248, 0.35);

  /* Z-index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-header: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-fast: 0ms;
    --duration: 0ms;
    --duration-slow: 0ms;
  }
}