/* --- Variables --- */
:root {
  --bg: #0f0f0f;
  --bg-elevated: #181818;
  --text: #e8e8e8;
  --text-muted: #8a8a8a;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --border: rgba(255, 255, 255, 0.08);
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 720px;
  --space: 1.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space) 2rem;
  background: rgba(15, 15, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.nav-logo {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
}

/* --- Main --- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem 4rem;
  padding-top: calc(60px + 3rem);
}

/* --- Hero --- */
.hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 0;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.5rem;
}

.hero-title {
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.hero-lang {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 2rem;
}

.hero-cta {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background 0.2s;
}

.hero-cta:hover {
  background: var(--accent-hover);
}

/* --- Sections --- */
.section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 2rem;
}

/* --- About --- */
.about-text {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 56ch;
}

/* --- Experience / Timeline --- */
.job {
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.job:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.job-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.job-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
}

.job-company {
  color: var(--accent);
  font-size: 0.9rem;
}

.job-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.job-desc {
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

.job-list {
  color: var(--text-muted);
  margin: 0 0 0.75rem;
  padding-left: 1.25rem;
}

.job-list li {
  margin-bottom: 0.35rem;
}

.job-tech {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.85;
}

/* --- Skills --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-group {
  padding: 1.25rem;
  background: var(--bg-elevated);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.skill-group h4 {
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.skill-group p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

/* --- Certifications --- */
.cert-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
}

.cert-item strong {
  color: var(--text);
}

.cert-item span {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Education --- */
.edu-item {
  margin-bottom: 1rem;
}

.edu-item h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
}

.edu-item p {
  color: var(--text-muted);
  margin: 0;
}

.extra {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.extra p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0 0 0.5rem;
}

/* --- Contact --- */
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin-bottom: 1.5rem;
}

.contact-links a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.contact-links span {
  color: var(--text-muted);
}

.privacy-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.8;
  max-width: 50ch;
}

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

.footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* --- Scroll reveal (for JS) --- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Mobile --- */
@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 1rem 2rem;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    gap: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  main {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .hero {
    min-height: 60vh;
  }

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