:root {
  --ink: #14181F;
  --paper: #F1F3F1;
  --paper-raised: #FFFFFF;
  --slate: #626C74;
  --line: #D7DBD6;
  --teal: #2F7A78;
  --teal-dim: #E6F0EF;
  --amber: #B5811A;
  --amber-bg: #FBF1DC;
  --progress: #9A5A2E;
  --progress-bg: #F6EAE0;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --max-width: 720px;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

html { scroll-behavior: smooth; }

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

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(241, 243, 241, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
}
.nav-brand:hover { text-decoration: none; color: var(--teal); }
.nav-links { display: flex; gap: 24px; }
.nav-links a {
  color: var(--slate);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--teal); text-decoration: none; }

/* MAIN CONTAINER */
main { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

.rule {
  max-width: var(--max-width);
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

/* ENTRY MARKER — shared by hero + entries */
.entry-marker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.version {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--teal);
  background: var(--teal-dim);
  padding: 3px 8px;
  border-radius: 3px;
}
.date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.02em;
}
.status {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 3px 8px;
  border-radius: 3px;
}
.status-live { color: var(--amber); background: var(--amber-bg); }
.status-progress { color: var(--progress); background: var(--progress-bg); }

/* HERO */
.hero { padding: 64px 0 48px; }
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.hero-role {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--slate);
  margin: 0 0 20px;
}
.hero-summary {
  font-size: 17px;
  color: #3A4148;
  max-width: 58ch;
  margin: 0 0 32px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  padding: 11px 20px;
  border-radius: 4px;
  border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: #2B323C; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--ink); }

/* SECTION LABELS */
.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin: 0 0 6px;
}
.section-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 32px;
}

/* LOG / ENTRIES */
.log { padding: 56px 0; }
.entry {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.entry:first-of-type { border-top: none; }
.entry-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 10px;
}
.entry-tags { margin: 0 0 14px; }
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 3px 8px;
  border-radius: 3px;
  margin: 0 6px 6px 0;
}
.entry-summary {
  color: #3A4148;
  max-width: 62ch;
  margin: 0 0 14px;
}
.entry-link { font-weight: 600; font-size: 14px; }
.entry-link-disabled {
  color: var(--slate);
  font-weight: 600;
  font-size: 14px;
  cursor: default;
}

/* RESEARCH */
.research { padding: 56px 0; }
.pub {
  padding: 20px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.pub-citation {
  font-size: 15px;
  color: #3A4148;
  margin: 0 0 12px;
}
.pub-citation em { font-style: italic; }

/* CV */
.cv { padding: 56px 0 72px; }
.cv-text { color: var(--slate); margin: 0 0 20px; }

/* FOOTER */
.footer {
  border-top: 1px solid var(--line);
  padding: 28px 24px 40px;
  text-align: center;
}
.footer p {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
  margin: 0;
}

/* RESPONSIVE */
@media (max-width: 480px) {
  .nav-links { gap: 16px; }
  .hero { padding: 48px 0 36px; }
  .entry-marker { gap: 8px; }
}