/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Neuton:wght@400;700&display=swap');

/* CSS Custom Properties - Space Theme (Dark Only) */
:root {
  /* Pure Black and White Theme */
  --primary-color: #ffffff;
  --primary-glow: transparent;
  --accent-color: #ffffff;
  --accent-glow: transparent;
  --secondary-color: #ffffff;
  
  --text-primary: #f0f0f0;
  --text-secondary: #b0b0b0;
  --text-muted: #808080;
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-tertiary: #1a1a1a;
  
  --border-color: #333333;
  --shadow-color: transparent;
  --shadow-hover: transparent;
  
  --font-family: 'Neuton', 'Georgia', 'Times New Roman', serif;
  
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  
  --transition: 200ms ease;
}

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

@keyframes glow {
  0%, 100% { text-shadow: 0 0 10px var(--primary-glow), 0 0 20px var(--primary-glow); }
  50% { text-shadow: 0 0 20px var(--primary-glow), 0 0 40px var(--primary-glow); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes orbit {
  0% { transform: rotate(0deg) translateX(50px) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(50px) rotate(-360deg); }
}

@keyframes slideInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInDown {
  from { opacity: 0; transform: translateY(-30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

@keyframes twinkle {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes rotateBorder {
  0% { border-color: #00d9ff; }
  50% { border-color: #ff006e; }
  100% { border-color: #00d9ff; }
}

@keyframes particleBurst {
  0% { opacity: 1; transform: scale(1) translate(0, 0); }
  100% { opacity: 0; transform: scale(0) translate(var(--tx), var(--ty)); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes neonPulse {
  0%, 100% { 
    text-shadow: 0 0 10px var(--primary-glow), 0 0 20px var(--primary-glow);
    color: var(--primary-color);
  }
  50% { 
    text-shadow: 0 0 20px var(--primary-glow), 0 0 40px var(--accent-glow);
    color: var(--accent-color);
  }
}

@keyframes scanlines {
  0% { background-position: 0 0; }
  100% { background-position: 0 100%; }
}

@keyframes moveUp {
  0% { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes rotate360 {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(135deg, #000000 0%, #0a0a15 50%, #000000 100%);
  position: relative;
  overflow-x: hidden;
  cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><g fill="%23ffffff"><polygon points="16,2 26,14 22,14 22,22 10,22 10,14 6,14"/><polygon points="12,16 14,16 14,18 12,18"/><polygon points="18,16 20,16 20,18 18,18"/></g></svg>') 16 16, auto;
}

/* Starfield Background */
#starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 50% 0%, rgba(2, 217, 255, 0.15) 0%, transparent 50%),
              radial-gradient(ellipse at 0% 50%, rgba(255, 0, 110, 0.1) 0%, transparent 50%),
              var(--bg-primary);
  z-index: 0;
  pointer-events: none;
}

.star {
  position: absolute;
  width: 2px;
  height: 2px;
  background: white;
  border-radius: 50%;
  opacity: 0.6;
  animation: twinkle calc(2s + var(--duration)) ease-in-out infinite;
}

/* Content wrapper to sit above starfield */
body > * {
  position: relative;
  z-index: 1;
}

/* Typography */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  animation: slideInDown 0.8s ease;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  line-height: 1.7;
  animation: slideInUp 0.8s ease;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: all var(--transition);
  position: relative;
}

a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition);
  box-shadow: none;
}

a:hover::after {
  width: 100%;
}

a:hover {
  text-shadow: none;
}

/* Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: linear-gradient(180deg, #000000 0%, #0a0a0a 100%);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.nav-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 3.5rem;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  transition: all var(--transition);
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-link {
  color: #b0b0b0;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition);
  padding-bottom: 0.5rem;
  position: relative;
}

.nav-link::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #ffffff;
  transition: width var(--transition);
  border-radius: 1px;
}

.nav-link:hover {
  color: #ffffff;
}

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

.nav-link.active {
  color: #ffffff;
}

.nav-link.active::before {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 0.25rem;
}

.bar {
  width: 1.25rem;
  height: 0.15rem;
  background-color: var(--primary-color);
  transition: all var(--transition);
  box-shadow: 0 0 5px var(--primary-glow);
}

/* Hero Section */
.hero {
  padding: 7rem var(--spacing-lg) 4rem;
  text-align: center;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  color: #ffffff;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: #ffffff;
  margin-bottom: var(--spacing-xl);
  font-weight: 500;
}

.hero-description {
  font-size: 1.05rem;
  margin-bottom: var(--spacing-2xl);
  line-height: 1.8;
  color: var(--text-secondary);
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  border: 2px solid;
  font-size: 0.95rem;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  animation: shimmer 3s infinite;
}

.btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.05), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: var(--radius-md);
  pointer-events: none;
}

.btn:hover::after {
  opacity: 1;
}

.btn-primary {
  background: #1a1a1a;
  color: #ffffff;
  border-color: #555555;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.05);
  background: #2a2a2a;
}

.btn-secondary {
  background: transparent;
  color: #ffffff;
  border-color: #555555;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

/* Sections */
.section {
  padding: 4rem var(--spacing-lg);
}

.section-alt {
  background-color: transparent;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  font-size: 1.75rem;
  color: #ffffff;
  position: relative;
  animation: slideInDown 0.8s ease;
}
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 2px;
  background: #ffffff;
  border-radius: 1px;
  animation: moveUp 0.8s ease;
}

/* About Section */
.about-content {
  max-width: 750px;
  margin: 0 auto;
}

.about-content p {
  margin-bottom: var(--spacing-xl);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.project-card {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border: 2px solid #555555;
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  animation: slideInUp 0.8s ease;
  backdrop-filter: blur(10px);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent, rgba(0, 217, 255, 0.1), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.project-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 217, 255, 0.2) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.project-card:hover::before {
  transform: translateX(100%);
}

.project-card:hover::after {
  opacity: 1;
}

.project-card:hover {
  border-color: #ffffff;
  transform: translateY(-8px) scale(1.02);
}

.project-title {
  margin-bottom: var(--spacing-md);
  color: #ffffff;
  font-size: 1.4rem;
}

.project-description {
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
  line-height: 1.7;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.tag {
  display: none;
}

.tag:hover {
  background: var(--primary-color);
  color: var(--bg-primary);
  box-shadow: 0 0 15px var(--primary-glow);
}

.project-link {
  display: inline-block;
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  border-bottom: 2px solid #ffffff;
  padding-bottom: 0.25rem;
  transition: all var(--transition);
}

.project-link:hover {
  opacity: 0.8;
}

/* Interests Section */
.interests-content {
  max-width: 750px;
  margin: 0 auto;
}

.interests-content p {
  margin-bottom: var(--spacing-2xl);
}

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

.interest-item {
  background: linear-gradient(135deg, rgba(2, 217, 255, 0.05), rgba(114, 9, 183, 0.05));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition);
  animation: slideInUp 0.8s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.interest-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, transparent 30%, rgba(0, 217, 255, 0.1) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
  pointer-events: none;
}

.interest-item:hover::before {
  transform: translateX(100%);
}

.interest-item:hover {
  border-color: var(--primary-color);
  box-shadow: 0 0 25px var(--primary-glow), inset 0 0 15px rgba(0, 217, 255, 0.05);
  transform: translateY(-4px);
}

.interest-item h3 {
  margin-bottom: var(--spacing-md);
  color: #ffffff;
}

.interest-item ul {
  list-style: none;
}

.interest-item li {
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition);
}

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

.interest-item li:hover {
  color: var(--primary-color);
  padding-left: 0.5rem;
  text-shadow: 0 0 10px var(--primary-glow);
}

/* Contact Section */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content p {
  margin-bottom: var(--spacing-2xl);
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-2xl);
}

.contact-link {
  padding: var(--spacing-md) var(--spacing-lg);
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border: 2px solid #555555;
  border-radius: var(--radius-md);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.contact-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.6s ease;
}

.contact-link:hover {
  border-color: #ffffff;
  transform: translateY(-2px);
}

.contact-link:hover::before {
  left: 100%;
}

.cv-section {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-2xl);
}

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
}

.footer p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 3.5rem;
    flex-direction: column;
    background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
    width: 100%;
    text-align: center;
    transition: 0.3s;
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    gap: var(--spacing-md);
    backdrop-filter: blur(10px);
  }

  .nav-menu.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active .bar:nth-child(1) {
    transform: translateY(0.35rem) rotate(45deg);
  }

  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-0.35rem) rotate(-45deg);
  }

  .hero {
    padding: 5.5rem var(--spacing-lg) 2rem;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-description {
    font-size: 0.95rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .interests-grid {
    grid-template-columns: 1fr;
  }

  .contact-links {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .section {
    padding: 3rem var(--spacing-lg);
  }

  .section-title {
    margin-bottom: var(--spacing-2xl);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .nav-container {
    padding: 0 var(--spacing-md);
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .hero-cta {
    gap: var(--spacing-sm);
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    padding: var(--spacing-lg);
  }

  .contact-links {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .contact-link {
    padding: var(--spacing-md);
  }
}

/* Smooth scroll offset for fixed navbar */
section {
  scroll-margin-top: 3.5rem;
}

/* Focus styles for accessibility */
.nav-link:focus,
.btn:focus,
.contact-link:focus,
.project-link:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Print styles */
@media print {
  .navbar,
  .hamburger {
    display: none;
  }

  .hero {
    padding: 1rem 0;
    min-height: auto;
  }

  .section {
    padding: 1rem 0;
    page-break-inside: avoid;
  }
}