/* ─── TOKENS ─── */
:root {
  --ink: #111827;
  --paper: #ffffff;
  --surface: #f8fafc;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --accent-dark: #1d4ed8;
  --warm: #dc6843;
  --muted: #64748b;
  --light: #94a3b8;
  --border: #e2e8f0;
  --font-heading: 'Outfit', -apple-system, sans-serif;
  --font-body: 'Source Sans 3', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 17px; }
body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--accent-soft); color: var(--accent-dark); }

/* ─── NAV ─── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
}
nav .nav-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem 2rem;
}
nav .logo {
  font-family: var(--font-heading); font-weight: 600; font-size: 1rem;
  color: var(--ink); text-decoration: none; letter-spacing: -0.02em;
}
nav .nav-links { display: flex; gap: 2rem; align-items: center; }
nav .nav-links a {
  font-family: var(--font-heading); font-size: 0.82rem; font-weight: 500;
  color: var(--muted); text-decoration: none; transition: color 0.2s;
}
nav .nav-links a:hover { color: var(--ink); }
nav .nav-links a.active { color: var(--ink); }
nav .nav-links a.cta {
  background: var(--ink); color: white;
  padding: 0.45rem 1.1rem; border-radius: 6px;
}
nav .nav-links a.cta:hover { background: var(--accent); }

/* ─── FOOTER ─── */
footer {
  background: var(--ink); padding: 1.5rem 2rem; text-align: center;
  font-size: 0.72rem; color: rgba(255,255,255,0.2);
}

/* ─── MOBILE MENU ─── */
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.menu-toggle span { display: block; width: 18px; height: 1.5px; background: var(--ink); margin: 4px 0; border-radius: 1px; }
@media (max-width: 700px) {
  .menu-toggle { display: block; }
  nav .nav-links {
    display: none; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
    padding: 1rem 2rem; gap: 0.8rem;
    border-bottom: 1px solid var(--border);
  }
  nav .nav-links.open { display: flex; }
}

/* ─── PAGE HEADER (cv + publications) ─── */
.page-header { padding: 7rem 2rem 2rem; max-width: 1100px; margin: 0 auto; }
.page-header .section-label {
  font-family: var(--font-heading); font-size: 0.72rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 0.6rem;
}
.page-header h1 {
  font-family: var(--font-heading); font-size: 2.2rem;
  font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.5rem;
}
.page-header p { font-size: 0.95rem; color: var(--muted); font-weight: 300; }

.content { max-width: 1100px; margin: 0 auto; padding: 1rem 2rem 4rem; }