/* ==========================================================================
   NEUVERA TECHNOLOGIES - MAIN STYLESHEET
   Premium Enterprise Intelligence Architecture
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS (CSS Variables)
   -------------------------------------------------------------------------- */
:root {
  /* Color System */
  --color-white: #FFFFFF;
  --color-slate-50: #F8FAFC;
  --color-slate-100: #F1F5F9;
  --color-slate-200: #E2E8F0;
  --color-slate-300: #CBD5E1;
  --color-slate-400: #94A3B8;
  --color-slate-500: #64748B;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1E293B;
  --color-slate-900: #0F172A;
  
  --color-navy-700: #1A2538;
  --color-navy-800: #0D1525;
  --color-navy-900: #060B14;

  --color-primary: #1A4CCC;       /* Trust blue */
  --color-primary-hover: #153D9E;
  --color-primary-light: #4B83FE; /* Action blue */
  --color-accent: #00F0FF;        /* Minimal tech accent */

  --color-error: #EF4444;
  --color-error-bg: #FEF2F2;
  --color-warning: #F59E0B;
  --color-warning-bg: #FFFBEB;

  /* Typography */
  --font-family-base: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  --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 */
  --font-size-6xl: 3.75rem;   /* 60px */
  --font-size-7xl: 4.5rem;    /* 72px */

  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  --line-height-none: 1;
  --line-height-tight: 1.1;
  --line-height-snug: 1.3;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing System (8px Baseline) */
  --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 */
  --spacing-32: 8rem;    /* 128px */

  /* Borders & Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Shadows (Stripe/Apple aesthetics) */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.05), 0 8px 10px -6px rgb(0 0 0 / 0.05);
  --shadow-glow: 0 0 20px rgba(26, 76, 204, 0.15);
  --shadow-glow-active: 0 0 30px rgba(26, 76, 204, 0.3);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Layout Constraints */
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
  
  /* Z-Index */
  --z-below: -1;
  --z-normal: 1;
  --z-above: 10;
  --z-header: 50;
  --z-modal: 100;
}

/* --------------------------------------------------------------------------
   2. RESET & BASE STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family-base);
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-slate-50);
  color: var(--color-slate-900);
  line-height: var(--line-height-normal);
  overflow-x: hidden;
}

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

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-slate-900);
  margin-bottom: var(--spacing-4);
  letter-spacing: -0.02em;
}

p {
  color: var(--color-slate-600);
  margin-bottom: var(--spacing-4);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

/* --------------------------------------------------------------------------
   3. UTILITIES & LAYOUT
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

@media (min-width: 640px) {
  .container { padding-left: var(--spacing-6); padding-right: var(--spacing-6); }
}

@media (min-width: 1024px) {
  .container { padding-left: var(--spacing-8); padding-right: var(--spacing-8); }
}

.section {
  padding-top: var(--spacing-20);
  padding-bottom: var(--spacing-20);
  position: relative;
}

@media (min-width: 1024px) {
  .section {
    padding-top: var(--spacing-32);
    padding-bottom: var(--spacing-32);
  }
}

.section--dark {
  background-color: var(--color-navy-900);
  color: var(--color-white);
}

.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 {
  color: var(--color-white);
}

.section--dark p {
  color: var(--color-slate-400);
}

.section--white {
  background-color: var(--color-white);
}

/* Flex & Grid Systems */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

/* Text Utilities */
.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding-bottom: 0.1em;
  margin-bottom: -0.1em;
}
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

/* Spacing Utilities */
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-10 { margin-bottom: var(--spacing-10); }
.mb-12 { margin-bottom: var(--spacing-12); }
.mb-16 { margin-bottom: var(--spacing-16); }

/* Visibility */
.hidden { display: none !important; }

@media (min-width: 768px) {
  .md\:hidden { display: none !important; }
  .md\:flex { display: flex !important; }
  .md\:block { display: block !important; }
}

@media (min-width: 1024px) {
  .lg\:hidden { display: none !important; }
  .lg\:block { display: block !important; }
}