:root {
  --primary: #4c9aff;
  --secondary: #2ecc71;
  --accent: #ff6b6b;
  --dark-bg: #0f1419;
  --card-bg: #1a1f2e;
  --border: #2a3142;
  --text-primary: #e8eaed;
  --text-secondary: #a8b0bb;
  --text-muted: #7a8392;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background: linear-gradient(135deg, var(--dark-bg) 0%, #151b28 100%);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 20, 25, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
  font-weight: 500;
}

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

/* Hero Section */
.hero {
  padding: 8rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(76, 154, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(46, 204, 113, 0.05) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary), #00d9ff, var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 0.9rem 2rem;
  border-radius: 8px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: var(--transition);
}

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

.btn-primary:hover {
  background: #357ace;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(76, 154, 255, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--dark-bg);
  transform: translateY(-2px);
}

/* Work Section */
.work {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.work h2 {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  text-align: center;
  font-weight: 700;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem;
  transition: var(--transition);
}

.project-card:hover {
  border-color: var(--primary);
  box-shadow: 0 20px 50px rgba(76, 154, 255, 0.1);
  transform: translateY(-5px);
}

.project-header {
  margin-bottom: 1.5rem;
}

.project-header h3 {
  font-size: 1.5rem;
  margin-bottom: 0.3rem;
}

.project-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.project-features {
  list-style: none;
  margin-bottom: 1.5rem;
}

.project-features li {
  color: var(--text-muted);
  padding: 0.4rem 0;
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
}

.project-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary);
}

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

.link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

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

/* Stack Section */
.stack {
  padding: 6rem 0;
  background: linear-gradient(180deg, rgba(76, 154, 255, 0.02) 0%, rgba(46, 204, 113, 0.02) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stack h2 {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  text-align: center;
  font-weight: 700;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.stack-category h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--primary);
  font-weight: 600;
}

.stack-category ul {
  list-style: none;
}

.stack-category li {
  color: var(--text-secondary);
  padding: 0.5rem 0;
  font-size: 0.95rem;
}

/* Other Projects */
.other-projects {
  padding: 6rem 0;
}

.other-projects h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  text-align: center;
  font-weight: 700;
}

.section-description {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

.projects-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.project-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition);
}

.project-item:hover {
  border-color: var(--primary);
  transform: translateX(5px);
  background: rgba(76, 154, 255, 0.05);
}

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

.arrow {
  color: var(--primary);
  font-weight: bold;
}

/* Contact Section */
.contact {
  padding: 6rem 0;
  text-align: center;
  border-top: 1px solid var(--border);
}

.contact h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.contact-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2.5rem;
}

.contact-btn {
  padding: 0.8rem 1.8rem;
  background: var(--card-bg);
  border: 2px solid var(--primary);
  color: var(--primary);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: var(--transition);
}

.contact-btn:hover {
  background: var(--primary);
  color: var(--dark-bg);
}

/* Footer */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  background: rgba(15, 20, 25, 0.5);
}

.footer p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

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

/* Responsive */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

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

  .work h2,
  .stack h2,
  .contact h2,
  .other-projects h2 {
    font-size: 1.8rem;
  }

  .hero {
    padding: 4rem 0;
  }

  .work,
  .stack,
  .other-projects,
  .contact {
    padding: 4rem 0;
  }

  .nav-links {
    gap: 1.5rem;
  }

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

  .stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-cta .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

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

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

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

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