/* ============================================
   HACKER PORTFOLIO - MAIN STYLES
   Design System & Core Layout
   ============================================ */

/* =============== IMPORTS =============== */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;600;700&display=swap');

/* =============== DESIGN TOKENS =============== */
:root {
  /* Colors - Base */
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-card: rgba(22, 27, 34, 0.8);
  
  /* Colors - Neon Accents */
  --color-cyan: #00f0ff;
  --color-cyan-dim: rgba(0, 240, 255, 0.3);
  --color-green: #39ff14;
  --color-green-dim: rgba(57, 255, 20, 0.3);
  --color-purple: #b026ff;
  --color-purple-dim: rgba(176, 38, 255, 0.3);
  --color-red: #ff3366;
  --color-yellow: #ffcc00;
  
  /* Colors - Text */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --text-dim: #484f58;
  
  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3rem;
  
  /* 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;
  
  /* Effects */
  --glow-cyan: 0 0 10px var(--color-cyan), 0 0 20px var(--color-cyan-dim);
  --glow-green: 0 0 10px var(--color-green), 0 0 20px var(--color-green-dim);
  --glow-purple: 0 0 10px var(--color-purple), 0 0 20px var(--color-purple-dim);
  --border-glow: 1px solid var(--color-cyan-dim);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  
  /* Layout */
  --max-width: 1200px;
  --header-height: 60px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-mono);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-cyan-dim);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-cyan);
}

/* Selection */
::selection {
  background: var(--color-cyan-dim);
  color: var(--text-primary);
}

/* =============== TYPOGRAPHY =============== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

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

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

a:hover {
  text-shadow: var(--glow-cyan);
}

code {
  font-family: var(--font-mono);
  background: var(--bg-tertiary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  font-size: var(--font-size-sm);
}

/* =============== LAYOUT =============== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  color: var(--color-cyan);
  text-transform: uppercase;
  letter-spacing: 4px;
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
}

.section-heading {
  font-size: var(--font-size-3xl);
  color: var(--text-primary);
}

/* =============== UTILITIES =============== */
.text-cyan { color: var(--color-cyan); }
.text-green { color: var(--color-green); }
.text-purple { color: var(--color-purple); }
.text-muted { color: var(--text-muted); }

.glow-cyan { text-shadow: var(--glow-cyan); }
.glow-green { text-shadow: var(--glow-green); }
.glow-purple { text-shadow: var(--glow-purple); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* =============== OVERLAYS =============== */
/* Scanlines */
.scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1000;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 240, 255, 0.02) 2px,
    rgba(0, 240, 255, 0.02) 4px
  );
}

/* Noise Texture */
.noise {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Vignette */
.vignette {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 998;
  background: radial-gradient(
    ellipse at center,
    transparent 0%,
    transparent 60%,
    rgba(0, 0, 0, 0.4) 100%
  );
}

/* =============== REDUCED MOTION =============== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* =============== RESPONSIVE =============== */
@media (max-width: 768px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }
  
  .container {
    padding: 0 var(--space-md);
  }
  
  section {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.25rem;
  }
}