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

:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-hover: #1a1a1a;
  --border: #222222;
  --text: #ffffff;
  --text-muted: #888888;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 4rem;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.3s;
}

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

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 4rem 4rem;
  gap: 6rem;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-subtitle {
  color: var(--accent-light);
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 1.5rem;
}

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

.hero-desc {
  color: var(--text-muted);
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 480px;
}

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

.btn {
  padding: 0.85rem 2rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  border-color: var(--text-muted);
  transform: translateY(-2px);
}

/* Code Block Visual */
.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  width: 100%;
  max-width: 420px;
}

.code-header {
  display: flex;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: var(--red); }
.dot.yellow { background: var(--yellow); }
.dot.green { background: var(--green); }

.code-block pre {
  padding: 1.5rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  line-height: 1.8;
  overflow-x: auto;
}

.keyword { color: #c678dd; }
.variable { color: #e06c75; }
.property { color: #61afef; }
.string { color: #98c379; }

/* Skills */
.skills {
  padding: 6rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 3rem;
  text-align: center;
}

.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.skill-category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem;
  transition: border-color 0.3s, transform 0.3s;
}

.skill-category:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.skill-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--accent-light);
}

.skill-category h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tag {
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-light);
  padding: 0.4rem 0.85rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
}

.tag.small {
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
}

.skill-category p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Projects */
.projects {
  padding: 6rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  max-width: 700px;
  margin: 0 auto;
}

.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.3s, transform 0.3s;
  color: var(--text);
  font-family: inherit;
}

.category-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.category-icon {
  font-size: 2.5rem;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.category-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.category-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 90%;
  max-width: 800px;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.3s;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 1.3rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: color 0.3s;
}

.modal-close:hover {
  color: var(--text);
}

.modal-body {
  padding: 2rem;
  display: grid;
  gap: 1.5rem;
}

.modal-project {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.3s, transform 0.3s;
  cursor: pointer;
}

.modal-project:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.modal-project.nolink {
  cursor: default;
}

.modal-project.nolink:hover {
  border-color: var(--border);
  transform: none;
}

.modal-project h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.modal-project p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.modal-project .project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* Contact */
.contact {
  padding: 6rem 4rem;
  text-align: center;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.contact-content p {
  color: var(--text-muted);
  font-size: 1.15rem;
  margin-bottom: 2rem;
}

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

.contact-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  text-decoration: none;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: border-color 0.3s, transform 0.3s;
}

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

.contact-icon {
  font-size: 1.1rem;
  color: var(--accent-light);
}

/* Footer */
.footer {
  padding: 2rem 4rem;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
  .navbar {
    padding: 1rem 1.5rem;
  }

  .hero {
    flex-direction: column;
    padding: 7rem 1.5rem 3rem;
    text-align: center;
    gap: 3rem;
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .skills,
  .projects {
    padding: 4rem 1.5rem;
  }

  .skills-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }

  .contact {
    padding: 4rem 1.5rem;
  }

  .contact-links {
    flex-direction: column;
    align-items: center;
  }
}