:root {
  --bg: #0a0e14;
  --bg-elev: #10161f;
  --bg-elev-2: #161d29;
  --text: #e7edf4;
  --text-dim: #93a1b3;
  --text-faint: #5c6b80;
  --accent: #4d8fff;
  --accent-2: #7cc4ff;
  --accent-soft: rgba(77, 143, 255, 0.12);
  --border: #212a38;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --maxw: 920px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60rem 30rem at 15% -10%, rgba(77, 143, 255, 0.16), transparent 60%),
    radial-gradient(50rem 26rem at 110% 10%, rgba(124, 196, 255, 0.10), transparent 60%);
}

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

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

/* ---------- Nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(10, 14, 20, 0.72);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1.02rem;
  color: var(--text);
}

.nav-brand span { color: var(--accent-2); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-links a:hover { color: var(--text); background: var(--bg-elev-2); }
.nav-links a.active { color: var(--accent-2); }

.nav-icons { display: flex; align-items: center; gap: 6px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  transition: color 0.15s ease, background 0.15s ease;
}

.icon-btn:hover { color: var(--text); background: var(--bg-elev-2); }
.icon-btn svg { width: 17px; height: 17px; }

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  align-items: center;
  justify-content: center;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: 8px 24px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 14, 20, 0.96);
}

.mobile-menu a {
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 0.95rem;
}

.mobile-menu.open { display: flex; }

/* ---------- Hero ---------- */

.hero {
  padding: 96px 0 72px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-2);
  letter-spacing: 0.02em;
  background: var(--accent-soft);
  border: 1px solid rgba(77, 143, 255, 0.25);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #43d17c;
  box-shadow: 0 0 0 3px rgba(67, 209, 124, 0.18);
}

.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  font-weight: 800;
}

.hero h1 .accent {
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  max-width: 620px;
  color: var(--text-dim);
  font-size: 1.08rem;
  margin: 0 0 32px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-bottom: 34px;
  font-size: 0.92rem;
  color: var(--text-dim);
}

.hero-meta a { color: var(--text-dim); }
.hero-meta a:hover { color: var(--accent-2); }

.hero-meta li { display: flex; align-items: center; gap: 8px; }
.hero-meta { list-style: none; padding: 0; margin: 0 0 34px; }
.hero-meta svg { width: 15px; height: 15px; flex-shrink: 0; color: var(--text-faint); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.94rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #051019;
}

.btn-secondary {
  background: var(--bg-elev);
  border-color: var(--border);
  color: var(--text);
}

.btn-secondary:hover { border-color: var(--accent); }
.btn svg { width: 16px; height: 16px; }

/* ---------- Section shell ---------- */

section { padding: 48px 0; }
section + section { border-top: 1px solid var(--border); }

.section-head { margin-bottom: 36px; }

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.section-head h2 {
  font-size: 1.6rem;
  letter-spacing: -0.01em;
  margin: 0;
}

/* ---------- Experience timeline ---------- */

.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(var(--border), var(--border) 90%, transparent);
}

.job {
  position: relative;
  padding-bottom: 40px;
}

.job:last-child { padding-bottom: 0; }

.job::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}

.job.current::before {
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.job-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  margin-bottom: 2px;
}

.job-title { font-size: 1.08rem; font-weight: 700; }

.job-dates {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-faint);
  white-space: nowrap;
}

.badge-current {
  display: inline-block;
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: #43d17c;
  background: rgba(67, 209, 124, 0.12);
  border: 1px solid rgba(67, 209, 124, 0.3);
  padding: 1px 8px;
  border-radius: 999px;
  vertical-align: middle;
}

.job-company {
  color: var(--accent-2);
  font-size: 0.92rem;
  margin-bottom: 12px;
}

.job-company a:hover { text-decoration: underline; }

.job ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-dim);
  font-size: 0.94rem;
}

.job li { margin-bottom: 6px; }
.job li:last-child { margin-bottom: 0; }
.job li::marker { color: var(--text-faint); }

/* ---------- Skills ---------- */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.skill-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.skill-card h3 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin: 0 0 12px;
}

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

.tag {
  font-size: 0.84rem;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  color: var(--text);
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
}

.about-body p { color: var(--text-dim); margin: 0 0 16px; }
.about-body p:last-child { margin-bottom: 0; }

.about-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  align-self: start;
}

.about-card dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-top: 16px;
}

.about-card dt:first-child { margin-top: 0; }
.about-card dd { margin: 4px 0 0; font-size: 0.92rem; }

/* ---------- Contact / footer ---------- */

.contact-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.contact-card h2 { margin: 0 0 10px; font-size: 1.5rem; }
.contact-card p { color: var(--text-dim); margin: 0 0 26px; }

.contact-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-faint);
}

.footer-inner .nav-icons { gap: 4px; }

/* ---------- Back to top ---------- */

#backToTop {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  z-index: 40;
}

#backToTop.show { display: flex; }
#backToTop svg { width: 18px; height: 18px; }

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .about-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 48px; }
  section { padding: 32px 0; }
  .contact-card { padding: 28px 20px; }
}

/* ---------- Accessibility ---------- */

.skip-link {
  position: absolute;
  top: -48px;
  left: 12px;
  z-index: 100;
  background: var(--accent);
  color: #051019;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 12px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

/* ---------- Print ---------- */

@media print {
  body::before { display: none; }
  .nav, #backToTop, .hero-actions .btn-secondary, .contact-card .btn-secondary { display: none; }
  body { background: #fff; color: #111; }
  .hero h1 .accent, .section-kicker, .job-company, .nav-brand span {
    -webkit-text-fill-color: initial;
    background: none;
    color: #1B4F91;
  }
  .skill-card, .about-card, .contact-card { border-color: #ccc; background: #fafafa; }
  section + section { border-top-color: #ddd; }
  a { color: #1B4F91; text-decoration: underline; }
  .hero-actions .btn-primary::after {
    content: " (" attr(href) ")";
    font-size: 0.7rem;
    font-weight: 400;
  }
}