:root {
  --bg: #0b0f14;
  --surface: #11161d;
  --card: #131a22;
  --text: #d7e0e8;
  --muted: #93a6b4;
  --green: #3fb950;
  --green-bright: #56d364;
  --amber: #e3b341;
  --cyan: #39c5cf;
  --accent: var(--green);
  --accent-2: var(--green-bright);
  --btn: #3fb950;
  --btn-hover: #2ea043;
  --border: #22303b;
  --maxw: 860px;
  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Fira Code", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* Accessibility helpers */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 8px; top: -48px; z-index: 100;
  background: var(--btn); color: #0b0f14; padding: 10px 16px; border-radius: 8px;
  font-family: var(--mono); font-weight: 700; transition: top .15s ease;
}
.skip-link:focus { top: 8px; text-decoration: none; }

/* Visible keyboard focus indicator (WCAG 2.4.7) */
a:focus-visible,
.btn:focus-visible,
#main:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  border-radius: 4px;
}
#main:focus { outline: none; }

/* Decorative CRT scanline texture (SVG data-URI overlay) */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 9000; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='3' height='3'%3E%3Crect width='3' height='1' y='0' fill='%23000000' fill-opacity='0.85'/%3E%3C/svg%3E");
  opacity: 0.28;
}
/* Soft vignette to deepen the CRT feel */
body::after {
  content: "";
  position: fixed; inset: 0; z-index: 8999; pointer-events: none;
  background: radial-gradient(120% 120% at 50% 0%, transparent 55%, rgba(0,0,0,0.6) 100%);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  font-size: 16px;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--green-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Sticky section nav */
.topnav {
  position: sticky; top: 0; z-index: 8500;
  background: rgba(11,15,20,0.85); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topnav ul {
  list-style: none; display: flex; flex-wrap: wrap; gap: 4px 6px;
  margin: 0 auto; padding: 8px 20px; font-family: var(--mono); font-size: 0.85rem;
}
.topnav a {
  display: inline-block; padding: 5px 10px; border-radius: 6px;
  color: var(--muted); border: 1px solid transparent;
}
.topnav a::before { content: "/"; color: var(--cyan); margin-right: 3px; }
.topnav a:hover { color: var(--cyan); border-color: var(--border); background: var(--surface); text-decoration: none; }

/* Hero */
.hero {
  position: relative;
  background:
    linear-gradient(160deg, rgba(17,22,29,0.78) 0%, rgba(11,15,20,0.88) 100%),
    url("assets/grid.svg");
  background-size: auto, 44px 44px;
  border-bottom: 1px solid var(--border);
  padding: 64px 0 48px;
}
.prompt-line {
  font-family: var(--mono); color: var(--muted); font-size: 0.9rem;
  margin: 0 0 12px;
}
.prompt-line .p-user { color: var(--green); }
.prompt-line .p-path { color: var(--cyan); }
.hero h1 {
  margin: 0 0 8px; font-size: 3rem; line-height: 1.05; letter-spacing: -0.02em;
  font-family: var(--mono);
}
.tagline {
  margin: 0 0 20px; color: var(--amber); font-weight: 600;
  font-family: var(--mono); font-size: 1.02rem;
}
.tagline::after {
  content: "\2588"; color: var(--green); margin-left: 4px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* Credibility stat chips */
.stats {
  list-style: none; display: flex; flex-wrap: wrap; gap: 10px;
  padding: 0; margin: 0 0 22px;
}
.stats li {
  font-family: var(--mono); font-size: 0.82rem; color: var(--muted);
  background: rgba(63,185,80,0.07); border: 1px solid var(--border);
  border-radius: 999px; padding: 6px 12px;
}
.stats .stat-num { color: var(--green-bright); font-weight: 700; }
.contact {
  list-style: none; display: flex; flex-wrap: wrap; gap: 8px 18px;
  padding: 0; margin: 0 0 22px; color: var(--muted); font-size: 0.95rem;
  font-family: var(--mono);
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 8px;
  border: 1px solid var(--border); color: var(--text); font-weight: 600;
  font-size: 0.95rem; font-family: var(--mono);
  transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--surface); border-color: var(--green); text-decoration: none; }
.btn.primary { background: var(--btn); border-color: var(--btn); color: #06210d; }
.btn.primary:hover { background: var(--btn-hover); border-color: var(--btn-hover); }

/* Sections */
main { padding: 8px 0 40px; }
section { padding: 52px 0; border-bottom: 1px solid rgba(34,48,59,0.5); scroll-margin-top: 60px; }
section:last-child { border-bottom: none; }
h2 {
  font-size: 1.55rem; margin: 0 0 22px; letter-spacing: 0.02em;
  text-transform: uppercase; font-family: var(--mono);
}
h2::before {
  content: "$ "; color: var(--green); font-weight: 700;
}
h3 { font-size: 1.05rem; margin: 0 0 4px; font-family: var(--mono); }
.section-note { color: var(--muted); font-size: 0.9rem; margin-top: -10px; margin-bottom: 20px; }

/* Skills */
.skills-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.skill-group {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px;
}
.skill-group h3 { color: var(--green-bright); font-size: 0.95rem; }
.skill-group h3::before { content: "# "; color: var(--muted); }
.skill-group p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* Cards (open source) — styled like terminal windows */
.cards {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 0; overflow: hidden;
  transition: transform .12s, border-color .12s;
}
.card::before {
  content: ""; display: block; height: 26px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  /* three "traffic-light" dots */
  background-image:
    radial-gradient(circle 5px at 16px 13px, #ff5f56 98%, transparent),
    radial-gradient(circle 5px at 34px 13px, var(--amber) 98%, transparent),
    radial-gradient(circle 5px at 52px 13px, var(--green) 98%, transparent);
}
.card:hover { transform: translateY(-2px); border-color: var(--green); }
.card h3 { font-size: 1rem; padding: 14px 16px 0; }
.card h3::before { content: "~/ "; color: var(--muted); }
.card p { margin: 6px 0 0; padding: 0 16px 12px; color: var(--muted); font-size: 0.92rem; }
.tags {
  list-style: none; display: flex; flex-wrap: wrap; gap: 6px;
  margin: 0; padding: 0 16px 16px;
}
.tags li {
  font-family: var(--mono); font-size: 0.72rem; color: var(--cyan);
  border: 1px solid var(--border); border-radius: 5px; padding: 3px 8px;
  background: rgba(57,197,207,0.06);
}

/* Experience */
.job { margin-bottom: 28px; }
.job-head { margin-bottom: 8px; }
.job-head h3 { font-size: 1.15rem; color: var(--text); }
.meta { color: var(--muted); font-size: 0.85rem; font-family: var(--mono); }
.job ul { margin: 8px 0 0; padding-left: 20px; }
.job li { margin-bottom: 6px; }
.job ul li::marker { content: "> "; color: var(--green); }
.earlier { color: var(--muted); font-size: 0.92rem; }

ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 4px 0; border-bottom: 1px solid var(--border); }
ul.plain li:last-child { border-bottom: none; }

code {
  background: var(--surface); padding: 1px 6px; border-radius: 4px;
  font-family: var(--mono); font-size: 0.85em; color: var(--green-bright);
}

/* Footer */
footer {
  border-top: 1px solid var(--border); padding: 24px 0;
  color: var(--muted); font-size: 0.9rem;
}

@media (max-width: 600px) {
  .hero { padding: 44px 0 32px; }
  .hero h1 { font-size: 2.1rem; }
  section { padding: 40px 0; }
  h2 { font-size: 1.35rem; }
}

/* Respect reduced-motion preferences (WCAG 2.3.3 / 2.2.2) */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}