/* Global Base Styles - Core foundational styles */

/* CSS Variables for consistent design system */
:root {
  /* Primary Colors - Professional B-esper brand system */
  --primary-blue: #022d54;
  --primary-blue-dark: #011831;
  --primary-blue-light: #0052a3;
  --secondary-blue: #1e293b;
  --accent-blue: #0ea5e9;

  /* Neutral Colors */
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* State Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Legacy color variables for backwards compatibility */
  --success-green: #10b981;
  --warning-orange: #f59e0b;
  --error-red: #ef4444;

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

  /* Typography Scale */
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-base: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem; /* 36px */
  --font-size-5xl: 3rem; /* 48px */

  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

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

  /* Border Radius */
  --radius-sm: 0.125rem; /* 2px */
  --radius: 0.25rem; /* 4px */
  --radius-md: 0.375rem; /* 6px */
  --radius-lg: 0.5rem; /* 8px */
  --radius-xl: 0.75rem; /* 12px */
  --radius-2xl: 1rem; /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg:
    0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl:
    0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Box Sizing Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default margins and paddings */
* {
  margin: 0;
  padding: 0;
}

/* Body and HTML */
html,
body {
  height: 100%;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue',
    Arial, sans-serif;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--gray-800);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Remove default list styles */
ul,
ol {
  list-style: none;
}

/* Remove default button styles */
button {
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

/* Remove default input styles */
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

/* Remove default link styles */
a {
  color: inherit;
  text-decoration: none;
}

/* Improve image defaults */
img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Remove default table spacing */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* Hidden utility */
.bsp-hidden {
  display: none !important;
}

/* Screen reader only */
.bsp-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus styles */
.bsp-focus-ring:focus {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

/* Selection styles */
::selection {
  background-color: var(--primary-blue);
  color: var(--white);
}

/* Scrollbar styles */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}