/* ============================================
   CYBERSECURITY PORTFOLIO - DESIGN SYSTEM
   ============================================ */

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   CSS VARIABLES - COLOR PALETTE & TOKENS
   ============================================ */
:root {
  /* Cybersecurity Color Palette */
  --color-bg-primary: #0a0e27;
  --color-bg-secondary: #111827;
  --color-bg-tertiary: #1a1f3a;
  
  /* Matrix Green - Primary Accent */
  --color-matrix-green: #00ff41;
  --color-matrix-green-dim: #00cc34;
  --color-matrix-green-glow: rgba(0, 255, 65, 0.3);
  
  /* Cyber Blue - Secondary Accent */
  --color-cyber-blue: #00d9ff;
  --color-cyber-blue-dim: #00a8cc;
  --color-cyber-blue-glow: rgba(0, 217, 255, 0.3);
  
  /* Warning/Alert Red */
  --color-alert-red: #ff0055;
  --color-alert-red-glow: rgba(255, 0, 85, 0.3);
  
  /* Text Colors */
  --color-text-primary: #e0e7ff;
  --color-text-secondary: #94a3b8;
  --color-text-dim: #64748b;
  
  /* Glassmorphism */
  --glass-bg: rgba(17, 24, 39, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Typography */
  --font-terminal: 'Fira Code', monospace;
  --font-body: 'Inter', sans-serif;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* ============================================
   ANIMATIONS & KEYFRAMES
   ============================================ */

/* Terminal Cursor Blink */
@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Glitch Effect */
@keyframes glitch {
  0% {
    transform: translate(0);
  }
  20% {
    transform: translate(-2px, 2px);
  }
  40% {
    transform: translate(-2px, -2px);
  }
  60% {
    transform: translate(2px, 2px);
  }
  80% {
    transform: translate(2px, -2px);
  }
  100% {
    transform: translate(0);
  }
}

/* Pulse Glow */
@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 20px var(--color-matrix-green-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--color-matrix-green-glow),
                0 0 60px var(--color-matrix-green-glow);
  }
}

/* Fade In Up */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Decrypt Effect */
@keyframes decrypt {
  0% {
    opacity: 0;
    filter: blur(10px);
  }
  100% {
    opacity: 1;
    filter: blur(0);
  }
}

/* Scan Line */
@keyframes scan {
  0% {
    transform: translateY(-100%);
  }
  100% {
    transform: translateY(100vh);
  }
}

/* Float Animation */
@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ============================================
   NETWORK BACKGROUND CANVAS
   ============================================ */
#network-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.3;
  pointer-events: none;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--spacing-sm) var(--spacing-md);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-terminal);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-matrix-green);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo::before {
  content: '>';
  color: var(--color-cyber-blue);
  animation: blink 1s infinite;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
  padding: 0.5rem 1rem;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-matrix-green);
  transition: var(--transition-normal);
  transform: translateX(-50%);
}

.nav-link:hover {
  color: var(--color-matrix-green);
}

.nav-link:hover::before {
  width: 80%;
}

.nav-link.active {
  color: var(--color-matrix-green);
}

/* ============================================
   MAIN CONTAINER
   ============================================ */
main {
  position: relative;
  z-index: 1;
}

.section {
  min-height: 100vh;
  padding: var(--spacing-xl) var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

/* ============================================
   HERO SECTION - TERMINAL
   ============================================ */
#hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.terminal-window {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  max-width: 800px;
  width: 100%;
  animation: fadeInUp 1s ease;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--glass-border);
}

.terminal-button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-button.red { background: var(--color-alert-red); }
.terminal-button.yellow { background: #ffaa00; }
.terminal-button.green { background: var(--color-matrix-green); }

.terminal-title {
  font-family: var(--font-terminal);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  margin-left: auto;
}

.terminal-body {
  font-family: var(--font-terminal);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-primary);
  min-height: 300px;
}

.terminal-line {
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: fadeInUp 0.5s ease forwards;
}

.terminal-prompt {
  color: var(--color-matrix-green);
  margin-right: 0.5rem;
}

.terminal-command {
  color: var(--color-cyber-blue);
}

.terminal-output {
  color: var(--color-text-secondary);
  margin-left: 1.5rem;
}

.terminal-cursor {
  display: inline-block;
  width: 10px;
  height: 20px;
  background: var(--color-matrix-green);
  animation: blink 1s infinite;
  margin-left: 2px;
}

.hero-name {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-matrix-green);
  text-shadow: 0 0 20px var(--color-matrix-green-glow);
}

.hero-title {
  color: var(--color-cyber-blue);
  font-size: 1.2rem;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
#about {
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.about-text h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-matrix-green);
  font-family: var(--font-terminal);
}

.about-text h2::before {
  content: '# ';
  color: var(--color-cyber-blue);
}

.encrypted-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.encrypted-text.decrypted {
  animation: decrypt 0.8s ease forwards;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  transition: var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-matrix-green);
  box-shadow: 0 10px 30px var(--color-matrix-green-glow);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-matrix-green);
  font-family: var(--font-terminal);
}

.stat-label {
  color: var(--color-text-dim);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
#skills {
  background: var(--color-bg-primary);
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--color-matrix-green);
  font-family: var(--font-terminal);
}

.section-title::before {
  content: '$ ';
  color: var(--color-cyber-blue);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.skill-category {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  transition: var(--transition-normal);
}

.skill-category:hover {
  transform: translateY(-10px);
  border-color: var(--color-cyber-blue);
  box-shadow: 0 15px 40px var(--color-cyber-blue-glow);
}

.skill-category h3 {
  font-size: 1.3rem;
  color: var(--color-cyber-blue);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-terminal);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-category h3::before {
  content: '⚡';
  font-size: 1.5rem;
}

.skill-list {
  list-style: none;
}

.skill-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--glass-border);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

.skill-item:last-child {
  border-bottom: none;
}

.skill-item::before {
  content: '▹';
  color: var(--color-matrix-green);
  font-weight: bold;
}

.skill-item:hover {
  color: var(--color-matrix-green);
  padding-left: 0.5rem;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
#projects {
  background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-md);
}

.project-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-matrix-green), var(--color-cyber-blue));
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-matrix-green);
  box-shadow: 0 20px 50px rgba(0, 255, 65, 0.2);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.project-icon {
  font-size: 2rem;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  color: var(--color-text-dim);
  text-decoration: none;
  transition: var(--transition-fast);
}

.project-link:hover {
  color: var(--color-matrix-green);
}

.project-card h3 {
  font-size: 1.5rem;
  color: var(--color-matrix-green);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-terminal);
}

.project-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.6;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--spacing-sm);
}

.tag {
  background: rgba(0, 255, 65, 0.1);
  color: var(--color-matrix-green);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: var(--font-terminal);
  border: 1px solid rgba(0, 255, 65, 0.3);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
#contact {
  background: var(--color-bg-primary);
}

.contact-container {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-container h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-matrix-green);
  font-family: var(--font-terminal);
}

.contact-container h2::before {
  content: '>> ';
  color: var(--color-cyber-blue);
}

.contact-subtitle {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-lg);
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.contact-method {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--color-text-primary);
  transition: var(--transition-normal);
  font-family: var(--font-terminal);
}

.contact-method:hover {
  border-color: var(--color-matrix-green);
  transform: translateX(10px);
  box-shadow: 0 10px 30px var(--color-matrix-green-glow);
}

.contact-icon {
  font-size: 1.5rem;
  color: var(--color-cyber-blue);
}

.contact-text {
  flex: 1;
  text-align: left;
}

.contact-label {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.contact-value {
  font-size: 1.1rem;
  color: var(--color-matrix-green);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-md);
  text-align: center;
  color: var(--color-text-dim);
  font-family: var(--font-terminal);
  font-size: 0.9rem;
}

footer p::before {
  content: '© ';
  color: var(--color-matrix-green);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.glitch {
  animation: glitch 0.3s infinite;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  .nav-menu {
    gap: var(--spacing-sm);
  }
  
  .nav-link {
    font-size: 0.85rem;
    padding: 0.5rem;
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .hero-name {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .terminal-window {
    padding: var(--spacing-sm);
  }
  
  .terminal-body {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
  }
  
  .nav-menu {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-matrix-green);
  border-radius: 5px;
}

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