/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --bg:        #F7F7F4;
  --bg-raised: #FFFFFF;
  --ink:       #1B1C1E;
  --ink-soft:  #52544F;
  --ink-faint: #8B8C84;
  --line:      #E1E0D6;
  --accent:    #23496B;
  --accent-2:  #6F93B3;
  --accent-soft: #EDF2F6;
  --accent-warm: #C4623C;

  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --maxw: 780px;
  --pad: clamp(20px, 5vw, 48px);
  --radius: 6px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(27,28,30,0.05);
  --shadow-md: 0 8px 24px -12px rgba(35,73,107,0.22);
  --ease: cubic-bezier(.2,.7,.3,1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(circle at 100% -10%, rgba(35,73,107,0.06), transparent 45%),
    radial-gradient(circle at -10% 20%, rgba(196,98,60,0.05), transparent 40%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; transition: color .15s var(--ease); }
a:hover { color: var(--accent-warm); }

:focus-visible {
  outline: 2px solid var(--accent-warm);
  outline-offset: 2px;
  border-radius: 2px;
}

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

/* ==========================================================================
   Header / nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 247, 244, 0.86);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 920px;
}

.brand {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}
.brand strong { color: var(--accent); }

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

nav.main-nav a {
  position: relative;
  font-family: var(--font-body);
  font-size: 14.5px;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: color .15s var(--ease), background .15s var(--ease);
}
nav.main-nav a:hover { color: var(--ink); background: var(--bg-raised); }
nav.main-nav a.active { color: var(--accent); font-weight: 600; }
nav.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-warm);
}

.lang-toggle {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  color: var(--ink-soft);
  padding: 6px 10px;
  border-radius: 20px;
  cursor: pointer;
  margin-left: 8px;
  transition: border-color .15s var(--ease), color .15s var(--ease), transform .15s var(--ease);
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  border: none;
  background: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  margin: 4px 0;
  content: "";
}

/* ==========================================================================
   Route motif (signature decorative element)
   ========================================================================== */
.route-rule {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  color: var(--accent-2);
}
.route-rule svg { display: block; width: 100%; height: 14px; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding: 60px 0 8px; }
.hero .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  max-width: 920px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 4.4vw, 3.1rem);
  line-height: 1.08;
  margin: 0 0 10px;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.hero .role {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--accent);
  margin: 0 0 20px;
}
.hero .bio {
  color: var(--ink-soft);
  max-width: 58ch;
  font-size: 16.5px;
}
.hero .bio strong { color: var(--ink); font-weight: 600; }
.hero .location {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  margin-top: 18px;
}
.hero .location svg { width: 14px; height: 14px; flex: none; color: var(--accent-warm); }

.portrait {
  width: 152px;
  height: 152px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  box-shadow: var(--shadow-md);
}
.portrait-fallback {
  width: 152px;
  height: 152px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--accent-2);
  box-shadow: var(--shadow-md);
}

/* Profile links (Lattes / Scholar) */
.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
  list-style: none;
  padding: 0;
}
.profile-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  padding: 7px 14px;
  border-radius: 20px;
  transition: border-color .15s var(--ease), transform .15s var(--ease), box-shadow .15s var(--ease);
}
.profile-links a:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  color: var(--accent);
}
.profile-links svg { width: 14px; height: 14px; flex: none; }

.interests { margin: 40px 0 8px; }
.formation { margin: 36px 0 8px; }
.interests h2, .formation h2, .metrics h2 {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 0 0 14px;
  font-weight: 500;
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.tag-list li {
  border: 1px solid var(--line);
  background: var(--bg-raised);
  color: var(--ink-soft);
  font-size: 13.5px;
  padding: 6px 12px;
  border-radius: 20px;
  transition: border-color .15s var(--ease), color .15s var(--ease);
}
.tag-list li:hover { border-color: var(--accent-2); color: var(--ink); }

.formation-list { display: flex; flex-direction: column; gap: 2px; }
.formation-item {
  display: grid;
  grid-template-columns: 108px 1fr;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}
.formation-item:last-child { border-bottom: none; }
.formation-period { font-family: var(--font-mono); font-size: 12.5px; color: var(--accent); white-space: nowrap; }
.formation-degree { font-weight: 600; font-size: 15px; margin: 0; }
.formation-institution { color: var(--ink-soft); font-size: 14px; margin: 2px 0 0; }

/* Metrics / citation stats */
.metrics { margin: 44px 0 8px; }
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.metric-card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px 16px;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}
.metric-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--accent-2); }
.metric-number {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
  margin: 0;
}
.metric-source { font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-faint); margin-top: 8px; }
.metric-works { font-size: 12.5px; color: var(--ink-soft); margin-top: 2px; }
.metrics-updated { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-faint); margin-top: 12px; }

/* ==========================================================================
   Sections (generic)
   ========================================================================== */
main { padding-bottom: 80px; }

.section { padding: 52px 0; border-top: 1px solid var(--line); }
.section .container { max-width: 780px; }

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}
.section-heading h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 2.1rem;
  margin: 0;
  letter-spacing: -0.01em;
}
.section-intro {
  color: var(--ink-soft);
  margin: 6px 0 32px;
  max-width: 60ch;
}

/* Publications */
.pub-year {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin: 36px 0 14px;
  padding-top: 2px;
}
.pub-year:first-of-type { margin-top: 0; }

.pub-item {
  padding: 16px 18px;
  margin-bottom: 8px;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  transition: border-color .18s var(--ease), background .18s var(--ease), transform .18s var(--ease);
}
.pub-item:hover { background: var(--bg-raised); border-color: var(--line); transform: translateX(2px); }
.pub-title { font-weight: 600; margin: 0 0 4px; }
.pub-authors { color: var(--ink-soft); font-size: 15px; margin: 0 0 2px; }
.pub-venue { color: var(--ink-faint); font-size: 14.5px; font-style: italic; margin: 0 0 8px; }
.pub-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 3px;
  padding: 2px 7px;
  margin-right: 8px;
  vertical-align: middle;
}
.pub-links { display: flex; gap: 14px; font-family: var(--font-mono); font-size: 12.5px; }

/* Cards: projects / teaching / advisees */
.card-list { display: flex; flex-direction: column; gap: 10px; }
.card {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-raised);
  transition: box-shadow .18s var(--ease), transform .18s var(--ease), border-color .18s var(--ease);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--accent-2); }
.card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.card-title { font-weight: 600; font-size: 16.5px; margin: 0; }
.card-meta { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); margin-top: 6px; }
.card-desc { color: var(--ink-soft); margin: 8px 0 0; font-size: 15px; }

.badge {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border-radius: 20px;
  white-space: nowrap;
}
.badge.ongoing { color: var(--accent); background: rgba(35,73,107,0.09); }
.badge.completed { color: var(--ink-faint); background: rgba(139,140,132,0.14); }
.badge.level { color: var(--accent-warm); background: rgba(196,98,60,0.10); }

.group-heading {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 32px 0 10px;
}
.group-heading:first-child { margin-top: 0; }

.empty-state {
  color: var(--ink-faint);
  font-style: italic;
  padding: 20px 0;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 8px;
}
.contact-block {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
}
.contact-block h2 {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin: 0 0 10px;
  font-weight: 500;
}
.contact-block address, .contact-block p { font-style: normal; margin: 0; color: var(--ink-soft); }
.contact-block address div { margin-bottom: 2px; }

/* Footer affiliations (logos institucionais) */
.affiliations-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 28px;
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}
.affiliations-list a {
  display: flex;
  align-items: center;
  opacity: 0.72;
  filter: grayscale(100%);
  transition: opacity .18s var(--ease), filter .18s var(--ease), transform .18s var(--ease);
}
.affiliations-list a:hover {
  opacity: 1;
  filter: grayscale(0%);
  transform: translateY(-1px);
}
.affiliations-list img {
  height: 34px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
  display: block;
}
.affiliation-fallback {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  background: var(--bg-raised);
  border-radius: 20px;
  padding: 7px 12px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 32px 0 60px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
}

/* Reveal-on-scroll (progressive enhancement, respects reduced motion) */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 720px) {
  .hero .container { grid-template-columns: 1fr; }
  .portrait, .portrait-fallback { width: 100px; height: 100px; order: -1; }
  .contact-grid { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr; }
  .formation-item { grid-template-columns: 1fr; gap: 2px; }

  nav.main-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 8px var(--pad) 16px;
    display: none;
  }
  nav.main-nav.open { display: flex; }
  nav.main-nav a { padding: 12px 4px; border-bottom: 1px solid var(--line); border-radius: 0; }
  nav.main-nav a.active::after { display: none; }
  nav.main-nav a:last-child { border-bottom: none; }
  .lang-toggle { align-self: flex-start; margin: 10px 0 0; }

  .nav-toggle { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Print */
@media print {
  .site-header, .nav-toggle, .lang-toggle { display: none; }
}