:root {
  /* Monochrome Terminal Colors */
  --bg-primary: #000000;
  --bg-secondary: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-tertiary: #999999;
  --text-dim: #666666;
  --border-primary: #ffffff;
  --border-secondary: #cccccc;
  --shadow: #000000;

  /* Typography */
  --ff-mono: "JetBrains Mono", "Courier Prime", monospace;

  /* Animations */
  --transition: 0.3s ease;
}

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

body {
  font-family: var(--ff-mono);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.4;
  overflow-x: hidden;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-primary);
  z-index: 1000;
  padding: 1rem 0;
}

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

.logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

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

.nav-link,
.menu-exit {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 400;
  transition: var(--transition);
  position: relative;
}

/* Hide on desktop, only show in mobile view */
.menu-exit {
  display: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-primary);
  color: var(--text-primary);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-family: var(--ff-mono);
  font-size: 0.9rem;
}

.nav-toggle:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
}

/* Hero section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 6rem 2rem 2rem;
  position: relative;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 6rem);
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 0.9;
  font-family: var(--ff-mono);
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.8rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 400;
}

/* The terminal cursor blinking animation */
.cursor {
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }

  51%,
  100% {
    opacity: 0;
  }
}

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

.btn {
  padding: 0.8rem 2rem;
  font-family: var(--ff-mono);
  font-weight: 400;
  font-size: 0.9rem;
  text-decoration: none;
  border: 1px solid var(--border-primary);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

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

/* Terminal box */
.terminal-box {
  font-family: var(--ff-mono);
  white-space: pre-line;
  margin: 2rem 0;
  padding: 1.5rem;
  border: 1px solid var(--border-secondary);
  background: var(--bg-secondary);
}

.terminal-box::before {
  content: "luth@Luth:~$ source ~/.bashrc";
  color: var(--text-secondary);
}

/* Sections */
.section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 3rem;
  position: relative;
  font-family: var(--ff-mono);
}

.section-title::before {
  content: "// ";
  color: var(--text-secondary);
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 1px;
  background: var(--text-primary);
}

/* Skills section */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.skill-category {
  background: var(--bg-secondary);
  border: 1px solid var(--border-secondary);
  padding: 2rem;
  transition: var(--transition);
}

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

.skill-category h3 {
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 1rem;
  font-family: var(--ff-mono);
}

.skill-category h3::before {
  content: "$ ";
  color: var(--text-secondary);
}

.skill-list {
  color: var(--text-tertiary);
  line-height: 1.8;
  font-family: var(--ff-mono);
  font-size: 0.9rem;
}

/* About me section */
.about-content {
  max-width: 800px;
  line-height: 1.8;
  color: var(--text-tertiary);
}

.terminal-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-secondary);
  padding: 1.5rem;
  margin: 2rem 0;
  font-family: var(--ff-mono);
  font-size: 0.9rem;
  overflow-x: auto;
}

.terminal-block::before {
  content: "# I know no one likes to read, it's totally up to you :)";
  color: var(--text-secondary);
  display: block;
  margin-bottom: 1rem;
}

/* Projects section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-secondary);
  padding: 2rem;
  position: relative;
  transition: var(--transition);
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--text-primary);
  opacity: 0;
  transition: var(--transition);
}

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

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

.project-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-family: var(--ff-mono);
}

.project-title::before {
  content: "> ";
  color: var(--text-secondary);
}

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

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 400;
  position: relative;
}

.tech-tag::before {
  content: "• ";
}

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

.project-link {
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  text-decoration: none;
  border: 1px solid var(--text-secondary);
  color: var(--text-secondary);
  transition: var(--transition);
  font-family: var(--ff-mono);
}

.project-link:hover {
  background: var(--text-secondary);
  color: var(--bg-primary);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-secondary);
  padding: 3rem 2rem 2rem;
  text-align: center;
}

.footer-text {
  color: var(--text-tertiary);
  margin-bottom: 1rem;
  font-family: var(--ff-mono);
  font-size: 0.9rem;
}

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

.social-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 400;
  padding: 0.5rem 1rem;
  border: 1px solid var(--text-secondary);
  transition: var(--transition);
  font-family: var(--ff-mono);
  font-size: 0.85rem;
}

.social-link:hover {
  background: var(--text-secondary);
  color: var(--bg-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100vh;
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
    border-right: 1px solid var(--border-primary);
  }

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

  .menu-exit,
  .nav-toggle {
    display: block;
  }

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

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

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

@media (max-width: 480px) {
  .nav,
  .hero,
  .section {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.8rem;
  }

  .project-card {
    padding: 1.5rem;
  }

  .social-links {
    gap: 0.5rem;
  }
}