/* CSS Variables */
:root {
  /* Colors */
  --bg-0: #0b0f14;
  --bg-1: #0f1520;
  --text: #e6f1ff;
  --muted: #8aa0b2;
  --acc-1: #00e5ff;
  --acc-2: #7cff6b;
  --acc-3: #a855f7;
  --warn: #ffb020;
  --err: #ff5470;
  
  /* 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;
  
  /* Typography */
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Inter', sans-serif;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  
  /* Borders & Effects */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --border: 1px solid rgba(138, 160, 178, 0.2);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);
  --glow-sm: 0 0 4px var(--acc-1);
  --glow-md: 0 0 8px var(--acc-1);
  --glow-lg: 0 0 16px var(--acc-1);
  
  /* Transitions */
  --transition-base: all 0.2s ease;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* High Contrast Theme */
[data-theme="contrast"] {
  --bg-0: #000;
  --bg-1: #111;
  --text: #fff;
  --muted: #aaa;
  --acc-1: #00ffff;
  --acc-2: #00ff00;
  --acc-3: #ff00ff;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg-0);
  overflow-x: hidden;
}

.bg-canvas {
  position: relative;
}

.bg-canvas::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(125deg, var(--bg-0) 0%, var(--bg-1) 100%);
  z-index: -2;
}

/* Canvas for animation */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

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

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

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

a {
  color: var(--acc-1);
  text-decoration: none;
  transition: var(--transition-base);
}

a:hover {
  color: var(--acc-2);
}

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

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

.stack-xs > * + * { margin-top: var(--space-xs); }
.stack-sm > * + * { margin-top: var(--space-sm); }
.stack-md > * + * { margin-top: var(--space-md); }
.stack-lg > * + * { margin-top: var(--space-lg); }
.stack-xl > * + * { margin-top: var(--space-xl); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

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

.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;
}

/* Glass Card */
.glass-card {
  background: rgba(15, 21, 32, 0.7);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  border: var(--border);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(0, 229, 255, 0.5), 
    transparent
  );
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--glow-sm);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  min-height: 44px;
  min-width: 44px;
}

.btn-primary {
  background-color: var(--acc-1);
  color: var(--bg-0);
  border-color: var(--acc-1);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--acc-1);
  box-shadow: var(--glow-sm);
}

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

.btn-outline:hover {
  background-color: var(--acc-1);
  color: var(--bg-0);
}

.terminal-btn {
  font-family: var(--font-mono);
  position: relative;
  overflow: hidden;
}

.terminal-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--acc-1);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.terminal-btn:hover::after {
  transform: translateX(0);
}

/* Navigation */
.nav-container {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 20, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(138, 160, 178, 0.1);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--acc-1);
}

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

.nav-link {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--acc-1);
  transition: width 0.3s ease;
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  cursor: pointer;
}

.nav-toggle span {
  width: 100%;
  height: 2px;
  background-color: var(--text);
  transition: var(--transition-smooth);
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Terminal Components */
.terminal-window {
  background: var(--bg-1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--space-xl);
}

.terminal-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.terminal-buttons {
  display: flex;
  gap: var(--space-sm);
}

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

.btn-close { background-color: var(--err); }
.btn-minimize { background-color: var(--warn); }
.btn-maximize { background-color: var(--acc-2); }

.terminal-title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--muted);
}

.terminal-body {
  padding: var(--space-xl);
  font-family: var(--font-mono);
  position: relative;
}

.terminal-body::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    transparent 50%,
    rgba(0, 0, 0, 0.1) 50%
  );
  background-size: 100% 4px;
  pointer-events: none;
  opacity: 0.1;
  z-index: 1;
}

.terminal-prompt {
  color: var(--acc-1);
  font-weight: 600;
}

.terminal-line {
  color: var(--muted);
  margin-bottom: var(--space-lg);
}

.blinking-cursor {
  animation: blink 1s step-end infinite;
  color: var(--acc-1);
}

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

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

.hero-terminal-body {
  background: transparent;
  position: relative;
  z-index: 2;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

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

.hero-name {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  margin: var(--space-lg) 0;
  background: linear-gradient(90deg, var(--acc-1), var(--acc-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
}

.hero-title {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  color: var(--muted);
  margin-bottom: var(--space-xl);
}

.hero-tagline {
  font-size: clamp(1rem, 3vw, 1.25rem);
  margin-bottom: var(--space-2xl);
  color: var(--muted);
}

.typing-animation {
  color: var(--acc-2);
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* About Section */
.about-text-about-me {
  color: var(--muted);
  line-height: 1.7;
  font-size: var(--text-lg);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.skill-category h3 {
  color: var(--acc-1);
  margin-bottom: var(--space-md);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.skill-tag {
  background: rgba(0, 229, 255, 0.1);
  color: var(--acc-1);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  border: 1px solid rgba(0, 229, 255, 0.3);
}

/* Education & Skills */
.education-timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.timeline-item {
  position: relative;
  padding-left: var(--space-xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--acc-1), transparent);
}

.timeline-item::after {
  content: '';
  position: absolute;
  left: -4px;
  top: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--acc-1);
}

.timeline-date {
  color: var(--acc-1);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.timeline-content h3 {
  color: var(--text);
  margin-bottom: var(--space-xs);
}

.timeline-content p {
  color: var(--muted);
  margin-bottom: 0;
}

.skills-list {
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}

/* Publications */
.publications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.publication-category .category-title {
  color: var(--acc-1);
  margin-bottom: var(--space-lg);
}

.publication-item {
  margin-bottom: var(--space-md);
}

.publication-item h4 {
  margin-bottom: var(--space-xs);
}

.publication-link {
  color: var(--text);
  transition: var(--transition-base);
}

.publication-link:hover {
  color: var(--acc-1);
}

.publication-type, .publication-status {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
}

.publication-type {
  background: rgba(124, 255, 107, 0.1);
  color: var(--acc-2);
  border: 1px solid rgba(124, 255, 107, 0.3);
}

.publication-status {
  background: rgba(255, 180, 32, 0.1);
  color: var(--warn);
  border: 1px solid rgba(255, 180, 32, 0.3);
}

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

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

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

.project-header h3 {
  margin-bottom: var(--space-sm);
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  justify-content: flex-end;
}

.tech-tag {
  background: rgba(168, 85, 247, 0.1);
  color: var(--acc-3);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.project-card p {
  color: var(--muted);
  flex: 1;
}

/* Achievements */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.honor-list {
  margin-top: var(--space-xl);
}

.honor-item {
  margin-bottom: var(--space-lg);
}

.honor-item h3 {
  color: var(--acc-1);
  margin-bottom: var(--space-xs);
}

.honor-item p {
  color: var(--muted);
  margin-bottom: 0;
}

.hobbies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.hobby-item {
  text-align: center;
  padding: var(--space-md);
  transition: var(--transition-smooth);
}

.hobby-item:hover {
  transform: translateY(-5px) scale(1.05);
  color: var(--acc-1);
  box-shadow: var(--glow-sm);
}

/* Contact */
.contact-content {
  margin-bottom: var(--space-xl);
}

.contact-box {
  height: 100%;
}

.contact-info {
  margin-top: var(--space-xl);
}

.contact-item {
  margin-bottom: var(--space-lg);
}

.contact-item h3 {
  color: var(--acc-1);
  margin-bottom: var(--space-xs);
}

.contact-link {
  color: var(--muted);
  font-size: var(--text-lg);
}

.contact-link:hover {
  color: var(--acc-1);
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.social-link {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.1);
  color: var(--acc-1);
  border: 1px solid rgba(0, 229, 255, 0.3);
  transition: var(--transition-smooth);
}

.social-link:hover {
  background: var(--acc-1);
  color: var(--bg-0);
  transform: translateY(-2px);
}

.terminal-output {
  color: var(--muted);
  line-height: 1.6;
}

.output-text {
  color: var(--acc-2);
  margin-bottom: var(--space-md);
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--muted);
  font-size: var(--text-sm);
  border-top: 1px solid rgba(138, 160, 178, 0.1);
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-1);
  border: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
}

.theme-toggle:hover {
  transform: rotate(30deg);
  box-shadow: var(--glow-sm);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .section {
    padding: var(--space-xl) 0;
  }
  
  .hero-content {
    min-height: 50vh;
  }
  
 
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-1);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    border-bottom: 1px solid rgba(138, 160, 178, 0.1);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .education-timeline {
    padding-left: var(--space-md);
  }
  
  .publications-grid,
  .projects-grid,
  .achievements-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --space-lg: 1rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
  }
  
  .terminal-body {
    padding: var(--space-lg);
  }
  
  .hero-name {
    font-size: var(--text-3xl);
  }
  
  .hero-title {
    font-size: var(--text-lg);
  }
  
  .hobbies-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .blinking-cursor {
    animation: none;
  }
  
  .glass-card:hover,
  .hobby-item:hover,
  .social-link:hover,
  .theme-toggle:hover {
    transform: none;
  }
}

/* Focus styles */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--acc-1);
  outline-offset: 2px;
}

/* Skip to content link */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--acc-1);
  color: var(--bg-0);
  padding: var(--space-sm);
  z-index: 1000;
  transition: top 0.3s ease;
}

.skip-to-content:focus {
  top: 0;
}

/* Add this to your existing CSS file */

/* Binary Rain Animation */
@keyframes binaryRain {
  0% {
    transform: translateY(-100%);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(100vh);
    opacity: 0;
  }
}

.binary-rain {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.binary-digit {
  position: absolute;
  color: rgba(0, 229, 255, 0.3);
  font-family: var(--font-mono);
  font-size: 14px;
  animation: binaryRain 5s linear infinite;
  user-select: none;
}

/* Responsive contact section */
@media (max-width: 768px) {
  .contact-content {
    grid-template-columns: 1fr !important;
    gap: 1.5rem !important;
  }
  
  .contact-box {
    width: 100%;
    margin-bottom: 1rem;
  }
  
  /* Ensure the profiles box comes first */
  .contact-content {
    display: flex;
    flex-direction: column;
  }
  
  .profiles-sh {
    order: -1; /* Move profiles to top */
  }
}

/* For very small screens */
@media (max-width: 480px) {
  .contact-content {
    gap: 1rem !important;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .social-link {
    flex: 1;
    min-width: 120px;
    text-align: center;
  }
}