/* ==========================================================================
   BISUN POWER — DESIGN TOKENS
   Single source of truth for color, type, spacing, radius, shadow, breakpoints.
   ========================================================================== */

:root {
  /* Color */
  --bp-primary: #18A558;
  --bp-primary-dark: #0e6b38;
  --bp-primary-glow: #3ee08a;
  --bp-dark: #111827;
  --bp-dark-panel: #1a2333;
  --bp-text: #374151;
  --bp-text-muted: #6B7280;
  --bp-bg: #F8FAFC;
  --bp-border: #E5E7EB;
  --bp-white: #FFFFFF;

  /* Typography */
  --bp-font-heading: 'Poppins', Arial, sans-serif;
  --bp-font-body: 'Inter', Arial, sans-serif;
  --bp-fs-h1: clamp(28px, 4vw, 44px);
  --bp-fs-h2: clamp(24px, 3vw, 32px);
  --bp-fs-h3: 18px;
  --bp-fs-h4: 15px;
  --bp-fs-body: 16px;
  --bp-fs-small: 14px;
  --bp-fs-caption: 12px;
  --bp-lh-heading: 1.2;
  --bp-lh-body: 1.65;

  /* Spacing scale (4px base) */
  --bp-space-1: 4px;
  --bp-space-2: 8px;
  --bp-space-3: 12px;
  --bp-space-4: 16px;
  --bp-space-6: 24px;
  --bp-space-8: 32px;
  --bp-space-12: 48px;
  --bp-space-16: 64px;
  --bp-space-24: 96px;

  /* Radius */
  --bp-radius-sm: 8px;
  --bp-radius-md: 12px;
  --bp-radius-lg: 18px;
  --bp-radius-xl: 24px;

  /* Shadow */
  --bp-shadow-card: 0 6px 18px rgba(17, 24, 39, 0.06);
  --bp-shadow-hover: 0 12px 28px rgba(17, 24, 39, 0.12);

  /* Layout */
  --bp-container-max: 1240px;
  --bp-gutter: 24px;

  /* Motion */
  --bp-transition-fast: 150ms ease;
  --bp-transition-base: 250ms ease;
}

/* Breakpoints (documented — used via media queries in components.css):
   Mobile:  < 640px
   Tablet:  640–1024px
   Desktop: 1024–1440px
   Wide:    > 1440px                                                     */