/* ─────────────────────────────────────────────────────────────
   Rafael C. R. de Lima — página pessoal
   Uma coluna, tipografia serifada, sem framework e sem build.
   ───────────────────────────────────────────────────────────── */

:root {
  color-scheme: light dark;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --bg: #fbfaf8;
  --bg-raise: #ffffff;
  --ink: #16161a;
  --ink-2: #4a4a52;
  --ink-3: #807e87;
  --rule: #e5e2dc;
  --accent: #3d3392;
  --accent-soft: #efedfb;

  --measure: 44rem;
  --pad: clamp(1.25rem, 5vw, 2.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f13;
    --bg-raise: #17171e;
    --ink: #e9e7e3;
    --ink-2: #b3b1b0;
    --ink-3: #83818a;
    --rule: #2a2a34;
    --accent: #ab9df6;
    --accent-soft: #1c1930;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  line-height: 1.65;
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
}

/* Troca de idioma: esconde o bloco do idioma que não está ativo. */
html[data-lang="pt"] [lang="en"],
html[data-lang="en"] [lang="pt"] { display: none; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: color-mix(in srgb, var(--accent) 38%, transparent);
}
a:hover { text-decoration-color: currentColor; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.mono { font-family: var(--mono); font-size: 0.9em; letter-spacing: -0.01em; }

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: var(--pad);
  top: 0.75rem;
  z-index: 10;
  background: var(--bg-raise);
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--rule);
  border-radius: 6px;
}

/* ── barra superior ─────────────────────────────────────────── */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem var(--pad) 0;
}

.topbar-name {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.langswitch {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}
.langswitch button {
  appearance: none;
  border: 0;
  background: none;
  padding: 0.2rem 0.35rem;
  margin: 0;
  font: inherit;
  color: var(--ink-3);
  cursor: pointer;
  border-radius: 3px;
}
.langswitch button:hover { color: var(--ink); }
.langswitch button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--accent-soft);
}
.langsep { color: var(--rule); }

/* ── estrutura ──────────────────────────────────────────────── */

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--pad) 1rem;
}

section { padding-block: clamp(2.5rem, 6vw, 3.75rem); }
section + section { border-top: 1px solid var(--rule); }

.seclabel {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 1.5rem;
}

.secintro {
  margin: -0.75rem 0 2rem;
  color: var(--ink-2);
  max-width: 36rem;
}

/* ── hero ───────────────────────────────────────────────────── */

.hero { padding-top: clamp(2rem, 6vw, 3.25rem); }

.hero h1 {
  font-size: clamp(2.15rem, 1.5rem + 3.1vw, 3.35rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.021em;
  margin: 0 0 1.1rem;
  text-wrap: balance;
}

.role {
  font-size: 1.05rem;
  margin: 0 0 0.35rem;
  color: var(--ink);
}

.affil {
  font-family: var(--sans);
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0 0 0.35rem;
}

.lede {
  margin: 1.75rem 0 0;
  font-size: clamp(1.1rem, 1.02rem + 0.4vw, 1.25rem);
  line-height: 1.5;
  color: var(--ink);
  border-left: 2px solid var(--accent);
  padding-left: 1.1rem;
  text-wrap: pretty;
}

.idlinks {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.4rem;
  margin: 1.9rem 0 0;
  padding: 0;
  font-family: var(--sans);
  font-size: 0.86rem;
}

/* ── prosa ──────────────────────────────────────────────────── */

.prose p {
  margin: 0 0 1.15rem;
  text-wrap: pretty;
}
.prose p:last-child { margin-bottom: 0; }
.prose strong { font-weight: 600; }

.note {
  font-family: var(--sans);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--ink-3);
  margin: 2.25rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
}

.chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 2rem 0 0;
  padding: 0;
}
.chips li {
  font-family: var(--sans);
  font-size: 0.775rem;
  line-height: 1;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--ink-2);
  background: var(--bg-raise);
}
.chips em { font-style: italic; }

/* ── programas ──────────────────────────────────────────────── */

.prog {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0 1.35rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--rule);
}
/* sem borda inferior no último: o divisor da seção já traça essa linha. */

.mark { color: var(--accent); }
.mark svg { width: 2.75rem; height: 2.75rem; display: block; }

.prog-body > *:first-child { margin-top: 0; }

.prog h3 {
  font-family: var(--sans);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.055em;
  margin: 0 0 0.15rem;
}

.prog-expand {
  font-family: var(--sans);
  font-size: 0.775rem;
  letter-spacing: 0.01em;
  color: var(--ink-3);
  margin: 0 0 0.85rem;
}

.prog p:not(.prog-expand):not(.prog-links) {
  margin: 0 0 1rem;
  color: var(--ink-2);
  text-wrap: pretty;
}

.prog-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.35rem;
  margin: 0;
  font-family: var(--sans);
  font-size: 0.85rem;
}

.cta {
  font-weight: 600;
  text-decoration: none;
}
.cta::after {
  content: " →";
  font-weight: 400;
}
.cta:hover { text-decoration: underline; text-underline-offset: 0.2em; }

/* ── disciplinas ────────────────────────────────────────────── */

.course {
  padding: 1.75rem 0;
  border-top: 1px solid var(--rule);
}

.level {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.4rem;
}

.course h3 {
  font-size: 1.45rem;
  font-weight: 400;
  letter-spacing: -0.012em;
  margin: 0 0 0.7rem;
}
.course h3 a { text-decoration: none; color: var(--ink); }
.course h3 a:hover { color: var(--accent); }

.course > p:not(.level):not(.prog-links) {
  margin: 0 0 1.1rem;
  color: var(--ink-2);
  text-wrap: pretty;
}

.course-more {
  margin-top: 1.75rem;
  padding: 1.35rem;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--bg-raise);
}
.course-more .level { margin-bottom: 0.65rem; }
.course-more ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.75;
}
.dim { color: var(--ink-3); }

/* ── publicações ────────────────────────────────────────────── */

.pubs {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pubs > li {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 0 1.25rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--rule);
}
/* idem: a nota de rodapé da seção traz a própria régua. */

/* O ano abre a entrada; o selo de preprint desce logo abaixo dele. */
.tag {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.year {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink-3);
  padding-top: 0.42rem;
  font-variant-numeric: tabular-nums;
}

.authors {
  font-family: var(--sans);
  font-size: 0.775rem;
  line-height: 1.5;
  color: var(--ink-3);
  margin: 0 0 0.3rem;
}
.authors b { color: var(--ink-2); font-weight: 600; }

.title {
  margin: 0 0 0.28rem;
  font-size: 1.03rem;
  line-height: 1.4;
  text-wrap: pretty;
}
.title a { color: var(--ink); text-decoration: none; }
.title a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 0.18em; }

.venue {
  font-family: var(--sans);
  font-size: 0.79rem;
  color: var(--ink-3);
  margin: 0;
}
.venue b { color: var(--ink-2); font-weight: 600; }

/* ── rodapé ─────────────────────────────────────────────────── */

footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2rem var(--pad) 3.5rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--ink-3);
}
footer p { margin: 0 0 0.6rem; }
.footlinks { display: flex; flex-wrap: wrap; gap: 0.35rem 1.15rem; }

/* ── telas estreitas ────────────────────────────────────────── */

@media (max-width: 32rem) {
  .prog { grid-template-columns: 1fr; gap: 0.9rem; }
  .mark svg { width: 2.25rem; height: 2.25rem; }
  .pubs > li { grid-template-columns: 1fr; gap: 0.3rem; }
  .year { padding-top: 0; }
  /* Em coluna única o selo cabe ao lado do ano. */
  .tag { display: inline; margin: 0 0 0 0.5rem; }
}

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