/* ================================================
   NinjaMinds.org - Main Stylesheet
   Futuristic Dark Theme with Cyber Aesthetics
   ================================================ */

/* CSS Custom Properties */
:root {
  /* Primary Colors - Cyber Cyan */
  --color-primary-50: #ecfeff;
  --color-primary-100: #cffafe;
  --color-primary-200: #a5f3fc;
  --color-primary-300: #67e8f9;
  --color-primary-400: #22d3ee;
  --color-primary-500: #06b6d4;
  --color-primary-600: #0891b2;
  --color-primary-700: #0e7490;
  --color-primary-800: #155e75;
  --color-primary-900: #164e63;

  /* Secondary Colors - Electric Purple */
  --color-secondary-50: #faf5ff;
  --color-secondary-100: #f3e8ff;
  --color-secondary-200: #e9d5ff;
  --color-secondary-300: #d8b4fe;
  --color-secondary-400: #c084fc;
  --color-secondary-500: #a855f7;
  --color-secondary-600: #9333ea;
  --color-secondary-700: #7e22ce;
  --color-secondary-800: #6b21a8;
  --color-secondary-900: #581c87;

  /* Accent Colors - Emerald */
  --color-accent-400: #4ade80;
  --color-accent-500: #22c55e;
  --color-accent-600: #16a34a;

  /* Gold Colors - Premium Accent */
  --color-gold-50: #fffbe6;
  --color-gold-100: #fff3c1;
  --color-gold-200: #ffe58f;
  --color-gold-300: #ffd666;
  --color-gold-400: #ffc53d;
  --color-gold-500: #faad14;
  --color-gold-600: #d48806;
  --color-gold-700: #ad6800;
  --color-gold-800: #874d00;
  --color-gold-900: #613400;

  /* Neutral Colors */
  --color-dark-950: #020617;
  --color-dark-900: #0f172a;
  --color-dark-800: #1e293b;
  --color-dark-700: #334155;
  --color-dark-600: #475569;
  --color-dark-500: #64748b;
  --color-dark-400: #94a3b8;
  --color-dark-300: #cbd5e1;
  --color-dark-200: #e2e8f0;
  --color-dark-100: #f1f5f9;
  --color-dark-50: #f8fafc;
  --color-white: #ffffff;

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* Shadows */
  --shadow-glow-cyan: 0 0 20px rgba(6, 182, 212, 0.3);
  --shadow-glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
  --shadow-glow-intense: 0 0 40px rgba(6, 182, 212, 0.5);
}

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

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

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-dark-300);
  background-color: var(--color-dark-950);
  min-height: 100vh;
  overflow-x: hidden;
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-primary-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-300);
}

/* Focus States */
:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

/* Section */
.section {
  padding: var(--space-3xl) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-4xl) 0;
  }
}

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

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

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Color Utilities */
.text-white { color: var(--color-white); }
.text-gray { color: var(--color-dark-400); }
.text-cyan { color: var(--color-primary-400); }
.text-purple { color: var(--color-secondary-400); }
.text-green { color: var(--color-accent-400); }

/* Gradient Text */
.gradient-text {
  background: linear-gradient(90deg, var(--color-primary-400) 0%, var(--color-secondary-400) 50%, var(--color-primary-400) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Background */
.bg-dark { background-color: var(--color-dark-900); }
.bg-darker { background-color: var(--color-dark-950); }

/* Background Pattern */
.bg-grid {
  background-image: 
    linear-gradient(rgba(6, 182, 212, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  position: relative;
}

/* Animated grid background */
@keyframes gridMove {
  0% {
    background-position: 0 0, 0 0;
  }
  100% {
    background-position: 50px 50px, 50px 50px;
  }
}

.bg-grid::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(6, 182, 212, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
  pointer-events: none;
  z-index: 0;
}

/* Logo Watermark */
.logo-watermark {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.015;
  pointer-events: none;
  z-index: 0;
  width: 70vw;
  height: 70vw;
  max-width: 900px;
  max-height: 900px;
  background-image: url('../assets/icons/ninjaminds-white.png');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  filter: blur(1px) drop-shadow(0 0 28px rgba(255, 255, 255, 0.06)) drop-shadow(0 0 60px rgba(251, 191, 36, 0.08));
}

.logo-watermark::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, transparent 20%, var(--color-dark-950) 80%);
}

/* subtle replicated glow for the watermark shape */
.logo-watermark::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../assets/icons/ninjaminds-white.png');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.05;
  filter: blur(10px);
  mix-blend-mode: screen;
}

/* Glow Effect */
.glow-cyan {
  box-shadow: var(--shadow-glow-cyan);
}

.glow-purple {
  box-shadow: var(--shadow-glow-purple);
}

.glow-gold {
  box-shadow: 0 0 20px rgba(251, 191, 36, 0.3), 0 0 40px rgba(251, 191, 36, 0.15);
}

/* Screen Reader Only */
.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;
}

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

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

/* 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); }
.mt-2xl { margin-top: var(--space-2xl); }
.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); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.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); }

/* Max Width */
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Performance Optimizations */
* {
  will-change: auto;
}

.card,
.btn,
.nav-link {
  will-change: transform;
}

/* Image Optimization - lazy loading and decoding are HTML attributes, not CSS */
img {
  max-width: 100%;
  height: auto;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  .bg-grid::before {
    animation: none;
  }
  
  .particle {
    animation: none;
  }
}