/* Import fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Orbitron:wght@400;500;700;900&display=swap');

/* CSS Variables - Light Theme */
:root {
  /* Core Brand Colors */
  --background: hsl(0, 0%, 100%);
  --foreground: hsl(220, 13%, 9%);
  
  /* Cards & Surfaces */
  --card: hsl(0, 0%, 100%);
  --card-foreground: hsl(220, 13%, 9%);
  
  /* Primary Brand - Professional Blue */
  --primary: hsl(214, 84%, 56%);
  --primary-foreground: hsl(0, 0%, 100%);
  --primary-glow: hsl(214, 84%, 66%);
  
  /* Secondary - Clean Grey */
  --secondary: hsl(220, 14%, 96%);
  --secondary-foreground: hsl(220, 13%, 9%);
  
  /* Cyber Accent - Matrix Green */
  --cyber: hsl(120, 100%, 50%);
  --cyber-foreground: hsl(220, 13%, 9%);
  --cyber-glow: hsl(120, 100%, 40%);
  
  /* Terminal Theme */
  --terminal-bg: hsl(220, 13%, 9%);
  --terminal-text: hsl(120, 100%, 80%);
  --terminal-prompt: hsl(214, 84%, 56%);
  
  /* Status Colors */
  --success: hsl(120, 100%, 40%);
  --warning: hsl(45, 100%, 60%);
  --danger: hsl(0, 84%, 60%);
  
  /* Muted Elements */
  --muted: hsl(220, 14%, 96%);
  --muted-foreground: hsl(220, 9%, 46%);
  
  /* Borders & Inputs */
  --border: hsl(220, 13%, 91%);
  --input: hsl(220, 13%, 91%);
  --ring: hsl(214, 84%, 56%);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, hsl(214, 84%, 56%), hsl(214, 84%, 66%));
  --gradient-cyber: linear-gradient(135deg, hsl(120, 100%, 50%), hsl(165, 100%, 50%));
  --gradient-dark: linear-gradient(135deg, hsl(220, 13%, 9%), hsl(220, 13%, 15%));
  
  /* Shadows & Effects */
  --shadow-soft: 0 2px 10px hsl(220, 13%, 9%, 0.1);
  --shadow-cyber: 0 0 20px hsl(120, 100%, 50%, 0.3);
  --shadow-primary: 0 4px 20px hsl(214, 84%, 56%, 0.2);
  
  /* Animations */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  --radius: 0.5rem;
}

/* Dark Theme */
body.dark {
  /* Dark Mode - Cyberpunk Aesthetic */
  --background: hsl(220, 27%, 4%);
  --foreground: hsl(0, 0%, 95%);
  
  --card: hsl(220, 27%, 6%);
  --card-foreground: hsl(0, 0%, 95%);
  
  /* Primary in Dark - Bright Cyber Blue */
  --primary: hsl(214, 100%, 70%);
  --primary-foreground: hsl(220, 27%, 4%);
  --primary-glow: hsl(214, 100%, 80%);
  
  --secondary: hsl(220, 27%, 12%);
  --secondary-foreground: hsl(0, 0%, 95%);
  
  /* Enhanced Cyber Green for Dark Mode */
  --cyber: hsl(120, 100%, 60%);
  --cyber-foreground: hsl(220, 27%, 4%);
  --cyber-glow: hsl(120, 100%, 50%);
  
  /* Dark Terminal */
  --terminal-bg: hsl(220, 27%, 2%);
  --terminal-text: hsl(120, 100%, 85%);
  --terminal-prompt: hsl(214, 100%, 70%);
  
  --muted: hsl(220, 27%, 12%);
  --muted-foreground: hsl(220, 9%, 65%);
  
  --border: hsl(220, 27%, 15%);
  --input: hsl(220, 27%, 15%);
  --ring: hsl(214, 100%, 70%);
  
  /* Dark Mode Gradients */
  --gradient-primary: linear-gradient(135deg, hsl(214, 100%, 70%), hsl(265, 100%, 70%));
  --gradient-cyber: linear-gradient(135deg, hsl(120, 100%, 60%), hsl(165, 100%, 60%));
  --gradient-dark: linear-gradient(135deg, hsl(220, 27%, 2%), hsl(220, 27%, 8%));
  
  /* Enhanced Dark Shadows */
  --shadow-soft: 0 4px 20px hsl(220, 27%, 2%, 0.8);
  --shadow-cyber: 0 0 30px hsl(120, 100%, 60%, 0.4);
  --shadow-primary: 0 4px 20px hsl(214, 100%, 70%, 0.3);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss01';
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header Styles */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 50;
  transition: var(--transition-smooth);
}

.header.scrolled {
  background-color: hsl(var(--background) / 0.8);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-soft);
  border-bottom: 1px solid var(--border);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  position: relative;
}

.shield-icon {
  width: 2rem;
  height: 2rem;
  color: var(--primary);
}

.shield-glow {
  position: absolute;
  top: 0;
  left: 0;
  animation: pulse-soft 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.shield-glow .shield-icon {
  color: var(--cyber);
  opacity: 0.5;
}

.logo-text h1 {
  font-family: 'Orbitron', system-ui, sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-subtitle {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

.desktop-nav {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  background: none;
  border: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--foreground);
  cursor: pointer;
  position: relative;
  transition: var(--transition-smooth);
  padding: 0.5rem 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -0.25rem;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-smooth);
}

.nav-link:hover::after {
  width: 100%;
}

.header-controls {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle, .mobile-theme-toggle {
  background: none;
  border: none;
  padding: 0.5rem;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-cyber);
}

.theme-toggle:hover, .mobile-theme-toggle:hover {
  background-color: var(--muted);
}

.theme-toggle svg, .mobile-theme-toggle svg {
  width: 1rem;
  height: 1rem;
}

.sun-icon {
  color: var(--cyber);
}

.moon-icon {
  color: var(--primary);
}

body:not(.dark) .sun-icon, body.dark .moon-icon {
  display: block;
}

body.dark .sun-icon, body:not(.dark) .moon-icon {
  display: none;
}

.security-status, .mobile-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: 9999px;
  padding: 0.375rem 0.75rem;
}

.status-indicator {
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--cyber);
  border-radius: 50%;
  animation: pulse-soft 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.security-status span, .mobile-status span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

.mobile-menu-toggle {
  display: block;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.mobile-menu-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--foreground);
}

.mobile-menu-toggle .close-icon {
  display: none;
}

.mobile-menu-toggle.active .menu-icon {
  display: none;
}

.mobile-menu-toggle.active .close-icon {
  display: block;
}

.mobile-nav {
  display: none;
  padding: 0.5rem;
  margin-top: 0.5rem;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.mobile-nav.active {
  display: block;
}

.mobile-nav-link {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.75rem;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 500;
  color: var(--foreground);
  cursor: pointer;
  border-radius: 0.375rem;
  transition: var(--transition-smooth);
}

.mobile-nav-link:hover {
  color: var(--primary);
  background-color: var(--muted);
}

.mobile-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  margin-top: 0.5rem;
  border-top: 1px solid var(--border);
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 5rem 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.terminal-init {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.terminal-icon {
  width: 1rem;
  height: 1rem;
  color: var(--cyber);
}

.hero-title {
  font-family: 'Orbitron', system-ui, sans-serif;
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.1;
}

.gradient-text {
  background: var(--gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cyber-text {
  background: var(--gradient-cyber);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--muted-foreground);
  max-width: 32rem;
}

.hero-tagline {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--foreground);
  max-width: 32rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

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

.stat-number {
  font-family: 'Orbitron', system-ui, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted-foreground);
}

.cta-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.btn-primary, .btn-outline {
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--primary-foreground);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: scale(1.05);
}

.btn-outline {
  background: transparent;
  color: var(--cyber);
  border: 1px solid var(--cyber);
}

.btn-outline:hover {
  background-color: var(--cyber);
  color: var(--cyber-foreground);
}

.hero-terminal {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.profile-image {
  position: relative;
  align-self: center;
}

.profile-img {
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--primary);
  box-shadow: var(--shadow-primary);
  animation: float 3s ease-in-out infinite;
}

.profile-glow {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--gradient-cyber);
  opacity: 0.2;
  animation: pulse-soft 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Terminal */
.terminal {
  background: var(--terminal-bg);
  color: var(--terminal-text);
  font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  box-shadow: var(--shadow-cyber);
  max-height: 24rem;
  overflow: hidden;
}

.terminal-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background-color: hsl(var(--terminal-bg) / 0.8);
}

.terminal-dots {
  display: flex;
  gap: 0.5rem;
}

.dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
}

.dot.red {
  background-color: #ff5f56;
}

.dot.yellow {
  background-color: #ffbd2e;
}

.dot.green {
  background-color: #27ca3f;
}

.terminal-content {
  padding: 1rem;
  height: 20rem;
  overflow-y: auto;
}

.terminal-output {
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.terminal-input {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.terminal-prompt {
  color: var(--terminal-prompt);
  font-weight: 600;
  flex-shrink: 0;
}

#terminal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: white;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
}

.cursor {
  color: white;
  animation: blink 1s infinite;
}

/* Sections */
.about-section, .skills-section, .projects-section, .contact-section {
  padding: 5rem 0;
}

.about-section, .projects-section {
  background-color: hsl(var(--muted) / 0.5);
}

.section-content {
  max-width: 64rem;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-family: 'Orbitron', system-ui, sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.section-description {
  font-size: 1.25rem;
  color: var(--muted-foreground);
  max-width: 32rem;
  margin: 0 auto;
}

/* Cards */
.about-cards, .contact-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.card, .contact-card, .project-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  transition: var(--transition-smooth);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-primary);
}

.card-header, .contact-card {
  padding: 1.5rem;
}

.card-icon, .contact-icon {
  width: 2rem;
  height: 2rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.cyber-color {
  color: var(--cyber);
}

.card-title, .contact-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.card-content {
  padding: 0 1.5rem 1.5rem;
}

.role-item, .education-item {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.education-status {
  margin-bottom: 0.25rem;
}

.education-college {
  font-size: 0.875rem;
  color: var(--muted-foreground);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  background-color: var(--secondary);
  color: var(--secondary-foreground);
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Skills */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.chart-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.chart-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--cyber);
}

.skills-list, .certifications-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

.skill-name {
  font-weight: 500;
}

.skill-percent {
  font-family: 'JetBrains Mono', monospace;
  color: var(--primary);
}

.skill-bar {
  width: 100%;
  height: 0.5rem;
  background-color: var(--muted);
  border-radius: 9999px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 9999px;
  width: 0;
  transition: width 1s ease-out;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition-smooth);
}

.cert-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

.cert-indicator {
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--cyber);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-header {
  padding: 1rem 1.5rem 0.75rem;
}

.project-badge {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.project-badge.red-team {
  background-color: var(--danger);
  color: white;
}

.project-badge.iot {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.project-badge.security {
  background-color: var(--secondary);
  color: var(--secondary-foreground);
}

.project-title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

.project-description {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--muted-foreground);
}

.project-content {
  padding: 0 1.5rem 1.5rem;
  margin-top: auto;
}

.tech-stack, .project-impact {
  margin-bottom: 0.75rem;
}

.tech-label, .impact-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  color: var(--muted-foreground);
  margin-bottom: 0.25rem;
}

.tech-list {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  margin: 0;
}

.impact-text {
  font-size: 0.875rem;
  color: var(--primary);
  margin: 0;
}

.project-btn {
  width: 100%;
  padding: 0.5rem 1rem;
  margin-top: 1rem;
  background: transparent;
  color: var(--foreground);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.project-btn:hover {
  background-color: var(--muted);
}

/* Contact */
.contact-cards {
  grid-template-columns: repeat(2, 1fr);
  margin-bottom: 3rem;
}

.contact-card {
  text-align: center;
  padding: 1.5rem;
}

.contact-info {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin: 0;
}

.security-notice {
  padding: 1.5rem;
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
}

.notice-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin-bottom: 0.5rem;
}

.security-icon {
  width: 1rem;
  height: 1rem;
  color: var(--cyber);
}

.response-time {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  margin: 0;
}

/* Footer */
.footer {
  background-color: var(--card);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

.footer-content {
  text-align: center;
  color: var(--muted-foreground);
}

.footer-content p {
  margin: 0.25rem 0;
  font-size: 0.875rem;
}

/* Animations */
@keyframes pulse-soft {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes blink {
  0%, 50% {
    opacity: 1;
  }
  51%, 100% {
    opacity: 0;
  }
}

/* Responsive Design */
@media (min-width: 640px) {
  .container {
    padding: 0 1.5rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .cta-buttons {
    flex-direction: row;
  }
  
  .hero-title {
    font-size: 3.75rem;
  }
  
  .hero-subtitle {
    font-size: 1.5rem;
  }
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
  
  .desktop-nav {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: none;
  }
  
  .about-cards {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-cards {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-title {
    font-size: 4.5rem;
  }
  
  .header-controls {
    display: flex;
  }
  
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 767px) {
  .logo-text {
    display: none;
  }
}