/* ===== CSS Variables ===== */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #161616;
  --bg-card-hover: #1a1a1a;
  --text-primary: #e8e8e8;
  --text-secondary: #888888;
  --text-muted: #555555;
  --accent: #00d4aa;
  --accent-dim: #00a88a;
  --border: #222222;
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Space Grotesk', system-ui, sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--text-primary);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* ===== Main Content ===== */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 4rem;
}

.hero-greeting {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.hero-name {
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.1s forwards;
}

.hero-tagline {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.2s forwards;
}

.hero-description {
  max-width: 540px;
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.3s forwards;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 600;
  border-radius: 4px;
  transition: all 0.2s ease;
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.4s forwards;
}

.hero-cta:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

/* ===== Section Headers ===== */
.section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.section-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--accent);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 300px;
}

/* ===== Projects Grid ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.75rem;
  transition: all 0.3s ease;
}

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

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

.project-icon {
  font-size: 2rem;
}

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

.project-links a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.project-links a:hover {
  color: var(--accent);
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(0, 212, 170, 0.1);
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
}

/* ===== About Section ===== */
.about-content {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 1rem;
  line-height: 1.7;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-highlight {
  color: var(--accent);
}

.about-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-avatar {
  width: 280px;
  height: 280px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
}

/* ===== Skills Section ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}

.skill-category-title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-item {
  color: var(--text-secondary);
  background: var(--bg-secondary);
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.skill-item:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

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

.contact-text {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.contact-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: all 0.2s ease;
}

.contact-link:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-primary);
  transform: translateY(-3px);
}

.contact-email {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
}

.contact-email:hover {
  color: var(--text-primary);
}

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

.footer p {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  section {
    padding: 4rem 0;
  }
  
  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .about-image {
    order: -1;
  }
  
  .about-avatar {
    width: 200px;
    height: 200px;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 1rem;
  }
  
  main {
    padding: 0 1rem;
  }
  
  .hero {
    padding-top: 3rem;
  }
  
  .contact-links {
    gap: 1rem;
  }
}