/* ─────────────────────────────────────────────
   Mario Rafael Silva — Academic Site
   Aesthetic: Refined editorial, serif-forward
   ───────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=DM+Sans:wght@300;400;500&display=swap');

:root {
  --ink:       #1a1a18;
  --ink-soft:  #4a4a46;
  --ink-muted: #8a8a84;
  --rule:      #d8d5cc;
  --bg:        #faf9f6;
  --bg-warm:   #f2efe8;
  --accent:    #7a3b1e;   /* deep terracotta — warm academic */
  --accent-lt: #c4733a;
  --link:      #2a4a7a;
  --nav-h:     64px;
  --max-w:     740px;
  --serif:     'EB Garamond', Georgia, serif;
  --sans:      'DM Sans', system-ui, sans-serif;
}

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

html { font-size: 18px; scroll-behavior: smooth; }

body {
  font-family: var(--serif);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ── LINKS ─────────────────────────────────── */
a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
a:hover { color: var(--accent); border-bottom-color: var(--accent-lt); }

/* ── NAV ────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: calc(var(--max-w) + 80px);
  width: 100%;
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-name {
  font-family: var(--serif);
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink);
  border: none;
  text-transform: uppercase;
}
.nav-name:hover { color: var(--accent); border: none; }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-family: var(--sans);
  font-size: .78rem;
  font-weight: 400;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border: none;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); border: none; }

/* mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  transition: all .3s;
}

/* ── PAGE WRAPPER ───────────────────────────── */
main {
  max-width: calc(var(--max-w) + 80px);
  margin: 0 auto;
  padding: 0 40px;
}

/* ── HERO (HOME) ────────────────────────────── */
.hero {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--rule);
}

.hero-name {
  font-family: var(--serif);
  font-size: 2.6rem;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--ink);
  margin-bottom: 6px;
}

.hero-title {
  font-family: var(--sans);
  font-size: .82rem;
  font-weight: 400;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 32px;
}

.hero-bio {
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--ink);
  max-width: 640px;
}
.hero-bio + .hero-bio { margin-top: 18px; }

.hero-meta {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-family: var(--sans);
  font-size: .8rem;
  color: var(--ink-muted);
}
.hero-meta a { color: var(--link); border: none; }
.hero-meta a:hover { color: var(--accent); }

.hero-cta {
  margin-top: 40px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 10px 22px;
  border-radius: 2px;
  border: none;
  transition: background .2s, color .2s;
}
.btn-primary {
  background: var(--ink);
  color: var(--bg);
}
.btn-primary:hover { background: var(--accent); color: var(--bg); border: none; }
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--rule) !important;
}
.btn-secondary:hover { border-color: var(--accent) !important; color: var(--accent); }

/* ── SECTION STRUCTURE ──────────────────────── */
.section {
  padding: 56px 0;
  border-bottom: 1px solid var(--rule);
}
.section:last-child { border-bottom: none; }

.section-label {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 28px;
}

/* ── PAGE HEADER (inner pages) ──────────────── */
.page-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--rule);
}
.page-header h1 {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 10px;
}
.page-header .subtitle {
  font-family: var(--sans);
  font-size: .82rem;
  color: var(--ink-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* ── PROSE ──────────────────────────────────── */
.prose p { margin-bottom: 1.2em; }
.prose p:last-child { margin-bottom: 0; }

/* ── RESEARCH ───────────────────────────────── */
.paper-list { list-style: none; }

.paper-item {
  padding: 28px 0;
  border-bottom: 1px solid var(--rule);
}
.paper-item:first-child { padding-top: 0; }
.paper-item:last-child { border-bottom: none; }

.paper-title {
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}

.paper-meta {
  font-family: var(--sans);
  font-size: .78rem;
  color: var(--ink-muted);
  margin-bottom: 10px;
  letter-spacing: .02em;
}
.paper-meta .journal { color: var(--accent); font-style: italic; }

.paper-abstract {
  font-size: .95rem;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 12px;
}

.paper-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.paper-links a {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--link);
  border: none;
}
.paper-links a:hover { color: var(--accent); }

/* ── TEACHING ───────────────────────────────── */
.course-list { list-style: none; }

.course-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}
.course-item:first-child { padding-top: 0; }
.course-item:last-child { border-bottom: none; }

.course-name {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}
.course-detail {
  font-family: var(--sans);
  font-size: .78rem;
  color: var(--ink-muted);
  margin-bottom: 8px;
}
.course-desc {
  font-size: .95rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ── RESOURCES ──────────────────────────────── */
.resource-section {
  padding: 40px 0;
  border-bottom: 1px solid var(--rule);
}
.resource-section:last-child { border-bottom: none; }
.resource-section:first-child { padding-top: 0; }

.resource-section h2 {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 20px;
}

.resource-list { list-style: none; }

.resource-list li {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--bg-warm);
  font-size: .97rem;
  line-height: 1.5;
}
.resource-list li:last-child { border-bottom: none; }

.resource-list .r-name {
  font-weight: 500;
  color: var(--ink);
  flex: 0 0 auto;
  max-width: 260px;
  min-width: 180px;
}
.resource-list .r-desc {
  color: var(--ink-soft);
  font-size: .9rem;
}

/* ── INFLUENCES ─────────────────────────────── */
.ref-list { list-style: none; }
.ref-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--bg-warm);
  font-size: .95rem;
  color: var(--ink-soft);
  line-height: 1.65;
}
.ref-item:last-child { border-bottom: none; }
.ref-item .ref-authors { color: var(--ink-muted); font-size: .85rem; font-family: var(--sans); }

/* ── CV ─────────────────────────────────────── */
.cv-section { padding: 36px 0; border-bottom: 1px solid var(--rule); }
.cv-section:first-child { padding-top: 0; }
.cv-section:last-child { border-bottom: none; }

.cv-section h2 {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 20px;
}

.cv-entry {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0 24px;
  padding: 10px 0;
  border-bottom: 1px solid var(--bg-warm);
}
.cv-entry:last-child { border-bottom: none; }

.cv-year {
  font-family: var(--sans);
  font-size: .8rem;
  color: var(--ink-muted);
  padding-top: 2px;
}

.cv-body strong {
  display: block;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1rem;
  color: var(--ink);
  margin-bottom: 2px;
}
.cv-body em {
  display: block;
  font-family: var(--sans);
  font-size: .82rem;
  color: var(--ink-soft);
  font-style: normal;
  margin-bottom: 4px;
}
.cv-body .cv-note {
  font-size: .85rem;
  color: var(--ink-muted);
}

/* ── FOOTER ─────────────────────────────────── */
footer {
  border-top: 1px solid var(--rule);
  padding: 36px 0;
  margin-top: 0;
}

.footer-inner {
  max-width: calc(var(--max-w) + 80px);
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-inner p {
  font-family: var(--sans);
  font-size: .76rem;
  color: var(--ink-muted);
}
.footer-inner a { color: var(--ink-muted); border: none; }
.footer-inner a:hover { color: var(--accent); }

/* ── FADE-IN ANIMATION ──────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp .6s ease forwards;
}
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.fade-in:nth-child(1) { animation-delay: .05s; }
.fade-in:nth-child(2) { animation-delay: .15s; }
.fade-in:nth-child(3) { animation-delay: .25s; }
.fade-in:nth-child(4) { animation-delay: .35s; }

/* ── RESPONSIVE ─────────────────────────────── */
@media (max-width: 680px) {
  html { font-size: 16px; }
  main, .nav-inner, .footer-inner { padding: 0 22px; }
  .hero { padding: 48px 0 40px; }
  .hero-name { font-size: 2rem; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--rule); padding: 20px 22px; gap: 18px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .cv-entry { grid-template-columns: 1fr; gap: 2px; }
  .cv-year { font-size: .75rem; }
  .resource-list .r-name { min-width: 0; max-width: none; }
  .resource-list li { flex-direction: column; gap: 4px; }
}

/* ── HERO SPLIT (photo + text) ───────────────── */
.hero-split {
  display: flex;
  align-items: flex-start;
  gap: 56px;
  padding: 64px 0 48px;
}
.hero-text {
  flex: 1;
  min-width: 0;
}
.hero-photo {
  flex-shrink: 0;
  width: 200px;
}
.hero-photo img {
  width: 200px;
  height: 240px;
  object-fit: cover;
  object-position: center top;
  border-radius: 6px;
  display: block;
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}
@media (max-width: 680px) {
  .hero-split {
    flex-direction: column-reverse;
    gap: 28px;
    padding: 40px 0 32px;
  }
  .hero-photo {
    width: 100%;
  }
  .hero-photo img {
    width: 140px;
    height: 168px;
    border-radius: 5px;
  }
}