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

:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --secondary: #10b981;
  --background: #0a0a0a;
  --surface: #1a1a1a;
  --surface-light: #252525;
  --text: #ffffff;
  --text-muted: #a1a1aa;
  --border: #27272a;
  --highlight: #60a5fa;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--background);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.3s;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  gap: 0.25rem;
}

.nav-toggle span {
  width: 1.5rem;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 1.5rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.1), transparent 50%),
    radial-gradient(circle at 70% 50%, rgba(16, 185, 129, 0.1), transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 700px;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-light);
  border-color: var(--primary);
}

.btn-small {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn-icon {
  width: 1.25rem;
  height: 1.25rem;
}

.hero-visual {
  display: none;
}

/* Section Title */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* About Section */
.about {
  padding: 6rem 1.5rem;
  background: var(--surface);
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-intro {
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 3rem;
  text-align: center;
}

.interests-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 2rem;
  text-align: center;
}

.interests-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.interest-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.3s;
}

.interest-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.interest-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.interest-card h4 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.interest-card p {
  color: var(--text-muted);
  line-height: 1.7;
}

/* Projects Section */
.projects {
  padding: 6rem 1.5rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 1rem;
}

.project-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.project-link {
  color: var(--text-muted);
  transition: color 0.3s;
}

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

.project-link svg {
  width: 1.25rem;
  height: 1.25rem;
}

.project-description {
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-footer {
  display: flex;
  gap: 0.75rem;
}

/* Contact Section */
.contact {
  padding: 6rem 1.5rem;
  background: var(--surface);
  text-align: center;
}

.contact-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
}

.contact-btn:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.2);
}

.contact-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Footer */
.footer {
  padding: 2rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-domain {
  margin-top: 0.5rem;
  color: var(--primary);
  font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.3s;
    pointer-events: none;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

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

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

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

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
    width: 100%;
  }

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

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

@media (min-width: 1024px) {
  .hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    padding: 6rem 3rem 4rem;
  }

  .hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
  }

  .floating-card {
    position: absolute;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: float 3s ease-in-out infinite;
  }

  .floating-card:nth-child(1) {
    top: 10%;
    right: 20%;
    animation-delay: 0s;
  }

  .floating-card:nth-child(2) {
    top: 50%;
    right: 5%;
    animation-delay: 0.5s;
  }

  .floating-card:nth-child(3) {
    bottom: 15%;
    right: 25%;
    animation-delay: 1s;
  }

  .card-icon {
    font-size: 2.5rem;
  }

  .card-text {
    font-weight: 600;
    color: var(--text-muted);
  }

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