:root {
  --bg: #0e1214;
  --surface: #151a1d;
  --surface-2: #1a2024;
  --text: #e8ecef;
  --muted: #97a1ab;
  --border: rgba(232, 236, 239, 0.09);
  --accent: #5eead4;
  --accent-ink: #062a24;
  --radius: 18px;
}

[data-theme="light"] {
  --bg: #f7f6f2;
  --surface: #fffefb;
  --surface-2: #f1efe8;
  --text: #1a1d21;
  --muted: #5c6470;
  --border: rgba(26, 29, 33, 0.1);
  --accent: #0d9488;
  --accent-ink: #ffffff;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Space Grotesk", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
  min-height: 100vh;
}

.mono { font-family: "JetBrains Mono", ui-monospace, monospace; }

.glow {
  position: fixed;
  top: -220px;
  right: -160px;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 14%, transparent), transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.shell {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ---------- top bar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 28px;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-family: "JetBrains Mono", monospace;
  font-weight: 500;
  font-size: 15px;
  text-decoration: none;
  color: var(--text);
}
.brand-dot { color: var(--accent); }

.nav { display: flex; gap: 18px; }
.nav a {
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav a:hover { color: var(--accent); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.15s;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle:active { transform: scale(0.96); }
.toggle-icon { color: var(--accent); }

/* ---------- hero ---------- */

.hero { padding: 84px 0 56px; }

.kicker {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 18px;
}

h1 {
  font-size: clamp(34px, 6vw, 54px);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.accent { color: var(--accent); }

.bio {
  color: var(--muted);
  max-width: 60ch;
  font-size: 17px;
  margin-bottom: 30px;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 22px; }

.btn {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 13.5px;
  text-decoration: none;
  border-radius: 999px;
  padding: 11px 22px;
  transition: transform 0.15s, opacity 0.2s, border-color 0.2s;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 500;
}
.btn-primary:hover { opacity: 0.88; }
.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--accent); }

.certs {
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.03em;
}

/* ---------- cards & sections ---------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
  transition: border-color 0.25s;
}
.card:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }

.feature { margin-bottom: 64px; }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

h2 { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
h3 { font-size: 15.5px; font-weight: 600; }

.chip {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}
.chip.live {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}

.feature p { color: var(--muted); margin-bottom: 14px; }

.arrow-link {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
}
.arrow-link:hover { text-decoration: underline; }

.section { margin-bottom: 72px; }

.section-title {
  font-family: "JetBrains Mono", monospace;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.section-note { color: var(--muted); font-size: 14px; margin: -12px 0 20px; }

.job { margin-bottom: 16px; }
.job-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.muted { color: var(--muted); }
.dates {
  font-family: "JetBrains Mono", monospace;
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
}
.job ul { list-style: none; }
.job li {
  color: var(--muted);
  font-size: 14.5px;
  padding-left: 18px;
  position: relative;
  margin-bottom: 6px;
}
.job li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.pub { display: block; text-decoration: none; color: inherit; }
.pub-tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  color: var(--accent);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 8px;
}
.pub h3 { margin-bottom: 6px; font-size: 15px; }
.pub p { color: var(--muted); font-size: 13.5px; }

.edu-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  padding: 18px 4px;
  border-top: 1px solid var(--border);
}
.edu-row:last-child { border-bottom: 1px solid var(--border); }
.edu-row .muted {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}

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

.footer {
  border-top: 1px solid var(--border);
  padding: 36px 0 48px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.social-dock { display: flex; gap: 18px; }
.social-dock a {
  font-family: "JetBrains Mono", monospace;
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
}
.social-dock a:hover { color: var(--accent); }
.small { font-size: 12px; }

@media (max-width: 640px) {
  .nav { display: none; }
  .hero { padding: 56px 0 44px; }
  .footer-inner { justify-content: center; text-align: center; }
}