:root {
  --bg: #0a0e14;
  --bg-alt: #0f1420;
  --surface: #121826;
  --surface-2: #161e2e;
  --border: #232d40;
  --text: #dbe4f0;
  --text-dim: #8a96ab;
  --accent: #4ee1a0;
  --accent-2: #57b8ff;
  --accent-soft: rgba(78, 225, 160, 0.12);
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", Consolas, Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(78, 225, 160, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78, 225, 160, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

a { color: inherit; text-decoration: none; }

h1, h2, h3 { font-weight: 700; letter-spacing: -0.02em; }

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

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(10, 14, 20, 0.75);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.prompt { color: var(--accent); margin-right: 4px; }

.cursor {
  color: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 14px;
}

.nav-links a {
  color: var(--text-dim);
  transition: color 0.15s ease;
}

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

.btn-nav {
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  padding: 6px 14px;
  border-radius: 6px;
}

.btn-nav:hover { background: var(--accent-soft); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

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

/* Hero */
.hero {
  padding: 100px 24px 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.hero-content {
  flex: 1;
  min-width: 0;
}

.hero-visual {
  flex-shrink: 0;
  width: 300px;
  display: flex;
  justify-content: center;
}

.hero-visual img {
  width: 100%;
  height: auto;
}

.eyebrow {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 14px;
  margin: 0 0 12px;
}

.hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  margin: 0;
  background: linear-gradient(90deg, var(--text), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-role {
  font-family: var(--mono);
  font-size: clamp(16px, 2.4vw, 20px);
  color: var(--accent-2);
  margin: 8px 0 20px;
}

.hero-summary {
  max-width: 620px;
  color: var(--text-dim);
  font-size: 17px;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: #06120c;
}

.btn-primary:hover {
  box-shadow: 0 0 24px rgba(78, 225, 160, 0.35);
  transform: translateY(-1px);
}

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

.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

.hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding: 0;
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
}

.hero-meta li { display: flex; align-items: center; gap: 8px; }

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

/* Sections */
.section { padding: 64px 24px; }

.section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 26px;
  margin: 0 0 28px;
}

.tag {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 4px 9px;
  border-radius: 6px;
  background: var(--surface);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.about-card p { margin-top: 0; color: var(--text-dim); }

.competencies {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.competencies span {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(78, 225, 160, 0.25);
  padding: 6px 12px;
  border-radius: 20px;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 28px;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.timeline-item { position: relative; }

.timeline-marker {
  position: absolute;
  left: -33px;
  top: 30px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.job-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-bottom: 14px;
}

.job-head h3 { margin: 0; font-size: 19px; }

.job-org { margin: 4px 0 0; color: var(--accent-2); font-size: 14px; }

.job-date {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
  margin: 0;
}

.pill {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 20px;
  margin-left: 8px;
  vertical-align: middle;
}

.card ul { margin: 0; padding-left: 20px; color: var(--text-dim); }

.card li { margin-bottom: 8px; font-size: 14.5px; }

.card li:last-child { margin-bottom: 0; }

/* Grids */
.grid { display: grid; gap: 20px; }

.grid-3 { grid-template-columns: repeat(3, 1fr); }

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

.project-card h3 { margin: 0 0 10px; font-size: 16px; color: var(--text); }

.project-card p { margin: 0; color: var(--text-dim); font-size: 14px; }

.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.skill-card h3 { margin: 0 0 14px; font-size: 15px; color: var(--accent-2); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chips span {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 5px 10px;
  border-radius: 6px;
}

/* Education */
.edu-degree { font-weight: 600; margin: 0 0 6px; }

.edu-school { color: var(--accent-2); margin: 0 0 4px; }

.edu-date { font-family: var(--mono); font-size: 13px; color: var(--text-dim); margin: 0; }

.cert-list { list-style: none; margin: 0; padding: 0; }

.cert-list li {
  display: flex;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
}

.cert-list li:last-child { border-bottom: none; }

.cert-year { font-family: var(--mono); color: var(--text-dim); font-size: 13px; }

/* Contact */
.contact-card { text-align: center; }

.contact-card p { color: var(--text-dim); margin-top: 0; }

.contact-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--mono);
  margin-top: 18px;
}

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

.contact-links a:hover { text-decoration: underline; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--mono);
}

/* Responsive */
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }

  .nav-links.open { max-height: 320px; }

  .nav-links li { width: 100%; padding: 14px 24px; border-bottom: 1px solid var(--border); }

  .btn-nav { display: inline-block; }

  .hero {
    flex-direction: column;
    padding: 72px 20px 56px;
    text-align: center;
  }

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

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

  .hero-visual { width: 220px; order: -1; }

  .grid-3, .grid-2, .skills-grid { grid-template-columns: 1fr; }

  .job-head { flex-direction: column; }
}