/* =================================
   Blue Ridge Computer - Main Styles
   Modern, Bold, Forward-Thinking
   ================================= */

/* CSS Variables - Color Palette */
:root {
  /* Primary Colors */
  --primary-blue: #1E90FF;
  --royal-blue: #0066CC;
  --sky-blue: #4ABADB;
  --cyan-blue: #42A5F5;

  /* Neutral Colors */
  --white: #FFFFFF;
  --light-gray: #F5F7FA;
  --medium-gray: #6B7280;
  --dark-gray: #1F2937;
  --black: #111827;

  /* Gradient Combinations */
  --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--royal-blue) 100%);
  --gradient-light: linear-gradient(135deg, var(--sky-blue) 0%, var(--cyan-blue) 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(30, 144, 255, 0.9) 0%, rgba(0, 102, 204, 0.9) 100%);

  /* Typography */
  --font-heading: 'Montserrat', 'Segoe UI', system-ui, -apple-system, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';

  /* Spacing (8px base unit) */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 96px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  --shadow-blue: 0 10px 30px rgba(30, 144, 255, 0.3);

  /* Transitions */
  --transition-fast: 200ms ease-in-out;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Z-index layers */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-modal: 1030;
  --z-tooltip: 1040;

  /* Background colors for theming */
  --bg-primary: var(--white);
  --bg-secondary: var(--light-gray);
  --text-primary: var(--dark-gray);
  --text-secondary: var(--medium-gray);
  --text-heading: var(--black);
  --card-bg: var(--white);
  --navbar-bg: rgba(255, 255, 255, 0.98);
  --footer-bg: var(--dark-gray);
  --border-color: #E5E7EB;
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --text-primary: #E2E8F0;
  --text-secondary: #94A3B8;
  --text-heading: #F8FAFC;
  --card-bg: #1E293B;
  --navbar-bg: rgba(15, 23, 42, 0.98);
  --footer-bg: #020617;
  --border-color: #334155;
  --light-gray: #1E293B;
  --white: #0F172A;
  --dark-gray: #E2E8F0;
  --medium-gray: #94A3B8;
  --black: #F8FAFC;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
}

/* Modern CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-heading);
  margin-bottom: var(--space-sm);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--royal-blue);
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Lists */
ul, ol {
  list-style: none;
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-wide {
  max-width: 1400px;
}

.container-narrow {
  max-width: 900px;
}

.section {
  padding: var(--space-2xl) 0;
}

.section-lg {
  padding: var(--space-3xl) 0;
}

.text-center {
  text-align: center;
}

.text-primary {
  color: var(--primary-blue);
}

.text-muted {
  color: var(--medium-gray);
}

.bg-light {
  background-color: var(--bg-secondary);
}

.bg-primary {
  background: var(--gradient-primary);
  color: var(--white);
}

.bg-primary h1,
.bg-primary h2,
.bg-primary h3,
.bg-primary p {
  color: var(--white);
}

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

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Spacing Utilities */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.pt-sm { padding-top: var(--space-sm); }
.pt-md { padding-top: var(--space-md); }
.pt-lg { padding-top: var(--space-lg); }

.pb-sm { padding-bottom: var(--space-sm); }
.pb-md { padding-bottom: var(--space-md); }
.pb-lg { padding-bottom: var(--space-lg); }

/* Animation Utilities */
.fade-in {
  opacity: 0;
  animation: fadeIn var(--transition-slow) forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

.slide-up {
  opacity: 0;
  transform: translateY(30px);
  animation: slideUp var(--transition-slow) forwards;
}

@keyframes slideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll animations (triggered by JS) */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  will-change: transform, opacity;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Fallback: Show content if JavaScript doesn't run or user prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
  .scroll-reveal {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fallback animation for when JavaScript loads */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Show content after 1 second if JS hasn't revealed it yet (fallback) */
.scroll-reveal {
  animation: fadeInUp 0.6s ease-out 1s forwards;
}

/* Print Styles */
@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a, a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  img {
    max-width: 100% !important;
  }

  @page {
    margin: 2cm;
  }
}