/**
 * HVAC Community Events - Design System
 * Master design tokens and component patterns
 * 
 * This file establishes the foundation for all HVAC plugin styles
 * following a systematic design approach with consistent spacing,
 * typography, colors, and component patterns.
 * 
 * @version 1.0.0
 * @since 2025-08-21
 */

/* ===== DESIGN TOKENS ===== */

:root {
  /* === SPACING SCALE (8px base unit) === */
  --hvac-space-0: 0;
  --hvac-space-1: 0.25rem;   /* 4px */
  --hvac-space-2: 0.5rem;    /* 8px */
  --hvac-space-3: 0.75rem;   /* 12px */
  --hvac-space-4: 1rem;      /* 16px */
  --hvac-space-5: 1.25rem;   /* 20px */
  --hvac-space-6: 1.5rem;    /* 24px */
  --hvac-space-8: 2rem;      /* 32px */
  --hvac-space-10: 2.5rem;   /* 40px */
  --hvac-space-12: 3rem;     /* 48px */
  --hvac-space-16: 4rem;     /* 64px */
  --hvac-space-20: 5rem;     /* 80px */
  
  /* === COLOR SYSTEM === */
  
  /* Primary Blue Scale */
  --hvac-primary-50: #e6f3fb;
  --hvac-primary-100: #cce7f7;
  --hvac-primary-200: #99cef0;
  --hvac-primary-300: #66b6e8;
  --hvac-primary-400: #339de0;
  --hvac-primary-500: #0274be;   /* Main brand color */
  --hvac-primary-600: #0264a8;
  --hvac-primary-700: #005493;
  --hvac-primary-800: #00437d;
  --hvac-primary-900: #003368;
  
  /* Neutral Gray Scale */
  --hvac-neutral-0: #ffffff;
  --hvac-neutral-50: #f9fafb;
  --hvac-neutral-100: #f3f4f6;
  --hvac-neutral-200: #e5e7eb;
  --hvac-neutral-300: #d1d5db;
  --hvac-neutral-400: #9ca3af;
  --hvac-neutral-500: #6b7280;
  --hvac-neutral-600: #4b5563;
  --hvac-neutral-700: #374151;
  --hvac-neutral-800: #1f2937;
  --hvac-neutral-900: #111827;
  
  /* Semantic Colors */
  --hvac-success-50: #f0fdf4;
  --hvac-success-500: #22c55e;
  --hvac-success-600: #16a34a;
  --hvac-success-700: #15803d;
  
  --hvac-warning-50: #fffbeb;
  --hvac-warning-500: #f59e0b;
  --hvac-warning-600: #d97706;
  --hvac-warning-700: #b45309;
  
  --hvac-error-50: #fef2f2;
  --hvac-error-500: #ef4444;
  --hvac-error-600: #dc2626;
  --hvac-error-700: #b91c1c;
  
  --hvac-info-50: #eff6ff;
  --hvac-info-500: #3b82f6;
  --hvac-info-600: #2563eb;
  --hvac-info-700: #1d4ed8;
  
  /* === TYPOGRAPHY SCALE === */
  --hvac-text-xs: 0.75rem;      /* 12px */
  --hvac-text-sm: 0.875rem;     /* 14px */
  --hvac-text-base: 1rem;       /* 16px */
  --hvac-text-lg: 1.125rem;     /* 18px */
  --hvac-text-xl: 1.25rem;      /* 20px */
  --hvac-text-2xl: 1.5rem;      /* 24px */
  --hvac-text-3xl: 1.875rem;    /* 30px */
  --hvac-text-4xl: 2.25rem;     /* 36px */
  
  /* Line Heights */
  --hvac-leading-tight: 1.25;
  --hvac-leading-snug: 1.375;
  --hvac-leading-normal: 1.5;
  --hvac-leading-relaxed: 1.625;
  --hvac-leading-loose: 2;
  
  /* Font Weights */
  --hvac-font-light: 300;
  --hvac-font-normal: 400;
  --hvac-font-medium: 500;
  --hvac-font-semibold: 600;
  --hvac-font-bold: 700;
  
  /* === BORDER RADIUS === */
  --hvac-radius-none: 0;
  --hvac-radius-sm: 0.25rem;     /* 4px */
  --hvac-radius-base: 0.5rem;    /* 8px */
  --hvac-radius-md: 0.75rem;     /* 12px */
  --hvac-radius-lg: 1rem;        /* 16px */
  --hvac-radius-xl: 1.5rem;      /* 24px */
  --hvac-radius-full: 9999px;
  
  /* === SHADOWS === */
  --hvac-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --hvac-shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --hvac-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --hvac-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --hvac-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* === TRANSITIONS === */
  --hvac-transition-fast: 150ms ease-in-out;
  --hvac-transition-base: 250ms ease-in-out;
  --hvac-transition-slow: 350ms ease-in-out;
  
  /* === Z-INDEX SCALE === */
  --hvac-z-hide: -1;
  --hvac-z-base: 0;
  --hvac-z-docked: 10;
  --hvac-z-dropdown: 1000;
  --hvac-z-sticky: 1100;
  --hvac-z-banner: 1200;
  --hvac-z-overlay: 1300;
  --hvac-z-modal: 1400;
  --hvac-z-popover: 1500;
  --hvac-z-skipnav: 1600;
  --hvac-z-toast: 1700;
  --hvac-z-tooltip: 1800;
  
  /* === RESPONSIVE BREAKPOINTS === */
  --hvac-screen-sm: 640px;
  --hvac-screen-md: 768px;
  --hvac-screen-lg: 1024px;
  --hvac-screen-xl: 1280px;
  --hvac-screen-2xl: 1536px;
  
  /* === COMPONENT TOKENS === */
  
  /* Container */
  --hvac-container-max-width: 1200px;
  --hvac-container-padding: var(--hvac-space-4);
  
  /* Cards */
  --hvac-card-padding: var(--hvac-space-6);
  --hvac-card-radius: var(--hvac-radius-base);
  --hvac-card-shadow: var(--hvac-shadow-base);
  --hvac-card-border: 1px solid var(--hvac-neutral-200);
  
  /* Buttons */
  --hvac-button-padding-sm: var(--hvac-space-2) var(--hvac-space-3);
  --hvac-button-padding-base: var(--hvac-space-3) var(--hvac-space-5);
  --hvac-button-padding-lg: var(--hvac-space-4) var(--hvac-space-8);
  --hvac-button-radius: var(--hvac-radius-base);
  --hvac-button-shadow: var(--hvac-shadow-sm);
  --hvac-button-transition: var(--hvac-transition-fast);
  
  /* Forms */
  --hvac-input-padding: var(--hvac-space-3) var(--hvac-space-4);
  --hvac-input-radius: var(--hvac-radius-base);
  --hvac-input-border: 1px solid var(--hvac-neutral-300);
  --hvac-input-shadow: var(--hvac-shadow-sm);
  --hvac-input-focus-ring: 0 0 0 3px rgba(2, 116, 190, 0.1);
  
  /* Navigation */
  --hvac-nav-padding: var(--hvac-space-4) var(--hvac-space-6);
  --hvac-nav-shadow: var(--hvac-shadow-base);
  
  /* Tables */
  --hvac-table-padding: var(--hvac-space-3) var(--hvac-space-4);
  --hvac-table-border: 1px solid var(--hvac-neutral-200);
  
  /* === ACCESSIBILITY === */
  --hvac-focus-ring: 0 0 0 3px rgba(2, 116, 190, 0.5);
  --hvac-focus-ring-offset: 2px;
  
  /* Minimum touch targets */
  --hvac-touch-target: 44px;
}

/* ===== RESET & BASE STYLES ===== */

/* Box sizing for all HVAC components */
.hvac-content,
.hvac-content *,
.hvac-content *::before,
.hvac-content *::after {
  box-sizing: border-box;
}

/* Base text styles */
.hvac-content {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: var(--hvac-text-base);
  line-height: var(--hvac-leading-normal);
  color: var(--hvac-neutral-900);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== LAYOUT UTILITIES ===== */

/* Container */
.hvac-container {
  max-width: var(--hvac-container-max-width);
  margin: 0 auto;
  padding: 0 var(--hvac-container-padding);
}

/* Grid System */
.hvac-grid {
  display: grid;
  gap: var(--hvac-space-6);
}

.hvac-grid-2 { grid-template-columns: repeat(2, 1fr); }
.hvac-grid-3 { grid-template-columns: repeat(3, 1fr); }
.hvac-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Responsive grid */
@media (max-width: 767px) {
  .hvac-grid-2,
  .hvac-grid-3,
  .hvac-grid-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .hvac-grid-3,
  .hvac-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Flexbox utilities */
.hvac-flex {
  display: flex;
}

.hvac-flex-col {
  flex-direction: column;
}

.hvac-items-center {
  align-items: center;
}

.hvac-justify-center {
  justify-content: center;
}

.hvac-justify-between {
  justify-content: space-between;
}

.hvac-justify-end {
  justify-content: flex-end;
}

.hvac-gap-2 { gap: var(--hvac-space-2); }
.hvac-gap-3 { gap: var(--hvac-space-3); }
.hvac-gap-4 { gap: var(--hvac-space-4); }
.hvac-gap-6 { gap: var(--hvac-space-6); }

/* ===== SPACING UTILITIES ===== */

/* Margin */
.hvac-m-0 { margin: 0 !important; }
.hvac-m-2 { margin: var(--hvac-space-2); }
.hvac-m-4 { margin: var(--hvac-space-4); }
.hvac-m-6 { margin: var(--hvac-space-6); }

.hvac-mt-0 { margin-top: 0 !important; }
.hvac-mt-2 { margin-top: var(--hvac-space-2); }
.hvac-mt-4 { margin-top: var(--hvac-space-4); }
.hvac-mt-6 { margin-top: var(--hvac-space-6); }
.hvac-mt-8 { margin-top: var(--hvac-space-8); }

.hvac-mb-0 { margin-bottom: 0 !important; }
.hvac-mb-2 { margin-bottom: var(--hvac-space-2); }
.hvac-mb-4 { margin-bottom: var(--hvac-space-4); }
.hvac-mb-6 { margin-bottom: var(--hvac-space-6); }
.hvac-mb-8 { margin-bottom: var(--hvac-space-8); }

/* Padding */
.hvac-p-0 { padding: 0 !important; }
.hvac-p-2 { padding: var(--hvac-space-2); }
.hvac-p-4 { padding: var(--hvac-space-4); }
.hvac-p-6 { padding: var(--hvac-space-6); }

.hvac-px-2 { padding-left: var(--hvac-space-2); padding-right: var(--hvac-space-2); }
.hvac-px-4 { padding-left: var(--hvac-space-4); padding-right: var(--hvac-space-4); }
.hvac-px-6 { padding-left: var(--hvac-space-6); padding-right: var(--hvac-space-6); }

.hvac-py-2 { padding-top: var(--hvac-space-2); padding-bottom: var(--hvac-space-2); }
.hvac-py-4 { padding-top: var(--hvac-space-4); padding-bottom: var(--hvac-space-4); }
.hvac-py-6 { padding-top: var(--hvac-space-6); padding-bottom: var(--hvac-space-6); }

/* ===== REDUCED MOTION SUPPORT ===== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== PRINT STYLES ===== */

@media print {
  .hvac-content {
    color: black !important;
    background: white !important;
  }
  
  .hvac-no-print {
    display: none !important;
  }
}