/**
 * Transform Personal Training - Design Tokens
 * 
 * Core CSS custom properties for the design system.
 * These tokens are used throughout the application for consistent styling.
 * 
 * Brand Colors:
 * - Primary: Blue (#0EA5E9) from logo tagline "YOUR BODY. YOUR LIFE."
 * - Secondary: Black (#1C1917) from logo wordmark "TRANSFORM"
 * - Accent: Orange (#F97316) for energy and CTAs
 */

:root {
  /* ===== PRIMARY BRAND COLOR: BLUE ===== */
  /* From Transform logo tagline */
  --color-primary-50: #F0F9FF;
  --color-primary-100: #E0F2FE;
  --color-primary-200: #BAE6FD;
  --color-primary-300: #7DD3FC;
  --color-primary-400: #38BDF8;
  --color-primary-500: #0EA5E9;
  /* Main brand blue */
  --color-primary-600: #0284C7;
  --color-primary-700: #0369A1;
  --color-primary-800: #075985;
  --color-primary-900: #0C4A6E;

  /* ===== SECONDARY BRAND COLOR: BLACK ===== */
  /* From Transform logo wordmark */
  --color-black-50: #FAFAF9;
  --color-black-100: #F5F5F4;
  --color-black-200: #E7E5E4;
  --color-black-300: #D6D3D1;
  --color-black-400: #A8A29E;
  --color-black-500: #78716C;
  --color-black-600: #57534E;
  --color-black-700: #44403C;
  --color-black-800: #292524;
  --color-black-900: #1C1917;
  /* Main brand black */

  /* ===== ACCENT COLOR: ORANGE ===== */
  /* Energetic accent for CTAs and highlights */
  --color-accent-50: #FFF7ED;
  --color-accent-100: #FFEDD5;
  --color-accent-200: #FED7AA;
  --color-accent-300: #FDBA74;
  --color-accent-400: #FB923C;
  --color-accent-500: #F97316;
  /* Main accent orange */
  --color-accent-600: #EA580C;
  --color-accent-700: #C2410C;
  --color-accent-800: #9A3412;
  --color-accent-900: #7C2D12;

  /* ===== SEMANTIC COLORS ===== */
  --color-success: #10B981;
  --color-success-dark: #059669;
  --color-warning: #F59E0B;
  --color-warning-dark: #D97706;
  --color-error: #EF4444;
  --color-error-dark: #DC2626;

  /* ===== TYPOGRAPHY ===== */
  --font-heading: 'Montserrat', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  /* Font Weights */
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* ===== SPACING SCALE ===== */
  --space-1: 0.25rem;
  /* 4px */
  --space-2: 0.5rem;
  /* 8px */
  --space-3: 0.75rem;
  /* 12px */
  --space-4: 1rem;
  /* 16px */
  --space-5: 1.25rem;
  /* 20px */
  --space-6: 1.5rem;
  /* 24px */
  --space-8: 2rem;
  /* 32px */
  --space-10: 2.5rem;
  /* 40px */
  --space-12: 3rem;
  /* 48px */
  --space-16: 4rem;
  /* 64px */
  --space-20: 5rem;
  /* 80px */
  --space-24: 6rem;
  /* 96px */
  --space-32: 8rem;
  /* 128px */

  /* ===== BORDER RADIUS ===== */
  --radius-sm: 0.25rem;
  /* 4px */
  --radius-md: 0.5rem;
  /* 8px */
  --radius-lg: 1rem;
  /* 16px */
  --radius-xl: 1.5rem;
  /* 24px */
  --radius-2xl: 2rem;
  /* 32px */
  --radius-full: 9999px;

  /* ===== SHADOWS ===== */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* ===== TRANSITIONS ===== */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* ===== BREAKPOINTS (for reference) ===== */
  --screen-xs: 475px;
  --screen-sm: 640px;
  --screen-md: 768px;
  --screen-lg: 1024px;
  --screen-xl: 1280px;
  --screen-2xl: 1536px;

  /* ===== CONTAINER WIDTHS ===== */
  --container-max: 1280px;
  --content-max: 1024px;
  --narrow-max: 768px;
}

/* ===== BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-weight: var(--font-weight-regular);
  color: var(--color-black-700);
  background-color: var(--color-black-50);
  line-height: 1.5;
}

/* ===== TYPOGRAPHY UTILITIES ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  color: var(--color-black-900);
  line-height: 1.2;
}

h1 {
  font-size: 1.875rem;
  /* 30px mobile */
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: 1.5rem;
  /* 24px */
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: 1.25rem;
  /* 20px */
  font-weight: var(--font-weight-semibold);
}

h4 {
  font-size: 1.125rem;
  /* 18px */
  font-weight: var(--font-weight-semibold);
}

/* Desktop typography scaling */
@media (min-width: 1024px) {
  h1 {
    font-size: 2.25rem;
    /* 36px desktop */
  }
}

/* ===== LINK STYLES ===== */
a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
}

a:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ===== UTILITY CLASSES ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

.section-padding {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

@media (min-width: 1024px) {
  .section-padding {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
}