/* ==========================================================================
   Social Influence — Design System Variables
   Dark tech-forward SaaS agency aesthetic
   ========================================================================== */

:root {
  /* ── Color Palette ─────────────────────────────────────────────────── */

  /* Primary: Deep slate backgrounds */
  --si-bg-primary: #0F172A;
  --si-bg-secondary: #1E293B;
  --si-bg-tertiary: #1F2937;
  --si-bg-card: #1F2937;
  --si-bg-card-hover: #374151;

  /* Surface: Light sections for contrast rhythm */
  --si-surface-light: #F8F9FC;
  --si-surface-white: #FFFFFF;
  --si-surface-muted: #F1F3F8;

  /* Accent: Brand magenta + gold system */
  --si-accent-primary: #9e005d;
  --si-accent-light: #E8609F;
  --si-accent-dark: #7d004a;
  --si-accent-gold: #FBBF24;
  --si-accent-gold-dark: #D4A006;
  --si-accent-glow: rgba(158, 0, 93, 0.25);
  --si-accent-subtle: rgba(158, 0, 93, 0.08);

  /* Gradient: Primary brand gradient */
  --si-gradient-primary: linear-gradient(135deg, #9e005d 0%, #FBBF24 100%);
  --si-gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #1F2937 100%);
  --si-gradient-card: linear-gradient(145deg, rgba(158,0,93,0.05) 0%, rgba(251,191,36,0.05) 100%);
  --si-gradient-cta: linear-gradient(135deg, #9e005d 0%, #7d004a 100%);
  --si-gradient-text: linear-gradient(135deg, #9e005d, #FBBF24);

  /* CTA colors */
  --si-cta-primary: #9e005d;
  --si-cta-hover: #7d004a;
  --si-cta-glow: rgba(158, 0, 93, 0.25);
  --si-success: #10B981;

  /* WhatsApp */
  --si-whatsapp: #25D366;
  --si-whatsapp-hover: #1EBE58;
  --si-whatsapp-glow: rgba(37, 211, 102, 0.3);

  /* Text */
  --si-text-white: #FFFFFF;
  --si-text-light: #D1D5DB;
  --si-text-muted: #9CA3AF;
  --si-text-dark: #1E293B;
  --si-text-body: #334155;
  --si-text-heading: #0F172A;

  /* Borders */
  --si-border-dark: #374151;
  --si-border-light: rgba(0, 0, 0, 0.06);
  --si-border-accent: rgba(158, 0, 93, 0.2);

  /* Status indicators */
  --si-success: #10B981;
  --si-warning: #F59E0B;
  --si-error: #EF4444;
  --si-info: #3B82F6;

  /* ── Typography ────────────────────────────────────────────────────── */

  /* Font families */
  --si-font-heading: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --si-font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --si-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font sizes — fluid clamp for responsive */
  --si-text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --si-text-sm: clamp(0.8125rem, 0.78rem + 0.2vw, 0.875rem);
  --si-text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);
  --si-text-lg: clamp(1.0625rem, 1rem + 0.3vw, 1.125rem);
  --si-text-xl: clamp(1.1875rem, 1.1rem + 0.4vw, 1.25rem);
  --si-text-2xl: clamp(1.375rem, 1.2rem + 0.9vw, 1.5rem);
  --si-text-3xl: clamp(1.625rem, 1.3rem + 1.6vw, 1.875rem);
  --si-text-4xl: clamp(1.875rem, 1.4rem + 2.4vw, 2.25rem);
  --si-text-5xl: clamp(2.25rem, 1.6rem + 3.2vw, 3rem);
  --si-text-6xl: clamp(2.75rem, 1.8rem + 4.8vw, 3.75rem);
  --si-text-hero: clamp(2.5rem, 1.5rem + 5vw, 4.5rem);

  /* Line heights */
  --si-leading-tight: 1.15;
  --si-leading-snug: 1.3;
  --si-leading-normal: 1.6;
  --si-leading-relaxed: 1.75;

  /* Font weights */
  --si-weight-normal: 400;
  --si-weight-medium: 500;
  --si-weight-semibold: 600;
  --si-weight-bold: 700;
  --si-weight-extrabold: 800;

  /* Letter spacing */
  --si-tracking-tight: -0.025em;
  --si-tracking-normal: 0;
  --si-tracking-wide: 0.025em;
  --si-tracking-wider: 0.05em;
  --si-tracking-widest: 0.1em;

  /* ── Spacing Scale (4px base) ──────────────────────────────────────── */
  --si-space-1: 0.25rem;   /* 4px */
  --si-space-2: 0.5rem;    /* 8px */
  --si-space-3: 0.75rem;   /* 12px */
  --si-space-4: 1rem;      /* 16px */
  --si-space-5: 1.25rem;   /* 20px */
  --si-space-6: 1.5rem;    /* 24px */
  --si-space-8: 2rem;      /* 32px */
  --si-space-10: 2.5rem;   /* 40px */
  --si-space-12: 3rem;     /* 48px */
  --si-space-16: 4rem;     /* 64px */
  --si-space-20: 5rem;     /* 80px */
  --si-space-24: 6rem;     /* 96px */
  --si-space-32: 8rem;     /* 128px */

  /* Section spacing */
  --si-section-py: clamp(4rem, 3rem + 5vw, 7rem);
  --si-section-px: clamp(1rem, 0.5rem + 2vw, 2rem);

  /* ── Layout ────────────────────────────────────────────────────────── */
  --si-container-max: 1280px;
  --si-container-wide: 1440px;
  --si-container-narrow: 800px;
  --si-container-padding: clamp(1rem, 0.5rem + 2vw, 2rem);

  /* ── Borders & Radius ──────────────────────────────────────────────── */
  --si-radius-sm: 6px;
  --si-radius-md: 10px;
  --si-radius-lg: 16px;
  --si-radius-xl: 24px;
  --si-radius-2xl: 32px;
  --si-radius-full: 9999px;

  /* ── Shadows ───────────────────────────────────────────────────────── */
  --si-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --si-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --si-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --si-shadow-xl: 0 16px 50px rgba(0, 0, 0, 0.15);
  --si-shadow-glow: 0 0 40px rgba(158, 0, 93, 0.15);
  --si-shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --si-shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);

  /* Dark section shadows */
  --si-shadow-dark-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --si-shadow-dark-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --si-shadow-dark-lg: 0 8px 30px rgba(0, 0, 0, 0.5);

  /* ── Transitions ───────────────────────────────────────────────────── */
  --si-transition-fast: 150ms ease;
  --si-transition-base: 250ms ease;
  --si-transition-slow: 400ms ease;
  --si-transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ── Z-index scale ─────────────────────────────────────────────────── */
  --si-z-base: 1;
  --si-z-dropdown: 100;
  --si-z-sticky: 200;
  --si-z-nav: 500;
  --si-z-overlay: 900;
  --si-z-modal: 1000;
  --si-z-whatsapp: 1100;

  /* ── Glassmorphism ─────────────────────────────────────────────────── */
  --si-glass-bg: rgba(255, 255, 255, 0.05);
  --si-glass-border: rgba(255, 255, 255, 0.1);
  --si-glass-blur: blur(20px);
  --si-glass-bg-light: rgba(255, 255, 255, 0.7);
  --si-glass-border-light: rgba(255, 255, 255, 0.3);
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  :root {
    --si-transition-fast: 0ms;
    --si-transition-base: 0ms;
    --si-transition-slow: 0ms;
    --si-transition-spring: 0ms;
  }
}