/* Identidade: monocromática (preto/branco), tipografia geométrica, formas arredondadas */
:root {
  --bg: #ffffff;
  --card: #ffffff;
  --soft: #f5f5f5;
  --text: #0a0a0a;
  --muted: #6b6b6b;
  --border: #e4e4e4;
  --accent: #0a0a0a;
  --accent-text: #ffffff;
  --erro: #c62828;
  --radius: 14px;
  --font: "Jost", "Futura", "Century Gothic", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0a0a;
    --card: #131313;
    --soft: #1b1b1b;
    --text: #f4f4f4;
    --muted: #a3a3a3;
    --border: #2a2a2a;
    --accent: #f4f4f4;
    --accent-text: #0a0a0a;
    --erro: #ff6b6b;
  }
}

* { box-sizing: border-box; }

html { color-scheme: light dark; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--text); text-underline-offset: 3px; }
a:hover { opacity: .7; }

[hidden] { display: none !important; }

.oculto { position: absolute; width: 0; height: 0; overflow: hidden; }

main, .topo, .rodape {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ---------- topo / marca ---------- */
.topo { text-align: center; padding-top: 48px; padding-bottom: 28px; transition: padding .3s; }

.marca {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  color: var(--text);
}
.marca:hover { opacity: 1; }

.selo { width: 190px; height: 190px; fill: var(--text); display: block; }
.selo text { font: 400 15.5px var(--font); letter-spacing: 0; }
.anel { transform-origin: 100px 100px; animation: girar 60s linear infinite; }
body.carregando .anel { animation-duration: 3s; }

@keyframes girar { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .anel { animation: none !important; } }

.nome { display: none; font-weight: 500; letter-spacing: .32em; font-size: 1.05rem; }
.sub {
  margin: 10px 0 0;
  color: var(--muted);
  font-weight: 300;
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: .78rem;
}

/* Depois da primeira busca: topo compacto */
body:not(.inicio) .topo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  padding-bottom: 18px;
  text-align: left;
}
body:not(.inicio) .marca { flex-direction: row; gap: 10px; }
body:not(.inicio) .selo { width: 54px; height: 54px; }
body:not(.inicio) .nome { display: inline; }
body:not(.inicio) .sub { margin: 0; text-align: right; }

/* ---------- busca ---------- */
.busca .linha { display: flex; gap: 8px; }
.busca input[type="search"] {
  flex: 1;
  min-width: 0;
  padding: 14px 22px;
  font: inherit;
  font-size: 1.05rem;
  border: 1.5px solid var(--text);
  border-radius: 999px;
  background: var(--card);
  color: var(--text);
}
.busca input::placeholder { color: var(--muted); font-weight: 300; }

input:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}
input[type="checkbox"] { accent-color: var(--text); }

button {
  padding: 12px 26px;
  font: inherit;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: .85rem;
  border: 1.5px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-text);
  cursor: pointer;
  transition: opacity .15s;
}
button:hover { opacity: .85; }
button:disabled { opacity: .3; cursor: default; }
button.secundario { background: transparent; color: var(--text); }

button.link {
  background: none;
  border: 0;
  padding: 0;
  color: var(--text);
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  font-size: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.filtros {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 20px;
  margin-top: 14px;
  font-size: .9rem;
  color: var(--muted);
}
body:not(.inicio) .filtros { justify-content: flex-start; }
.filtros label { display: flex; align-items: center; gap: 6px; }
.filtros input[type="number"] { width: 5.5em; }
.filtros input[type="number"], .filtros select, .barra select {
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--text);
  font: inherit;
  max-width: 100%;
}

.status { margin: 24px 0 10px; color: var(--muted); font-size: .9rem; min-height: 1.4em; }
.status.erro { color: var(--erro); }

/* ---------- barra de exportação ---------- */
.barra {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  margin-bottom: 14px;
  padding: 12px 16px;
  background: var(--soft);
  border-radius: var(--radius);
  font-size: .9rem;
}
.barra-sel, .barra-exp { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.barra-sel label { display: flex; align-items: center; gap: 6px; }
#sel-info { color: var(--muted); }
.barra button:not(.link) { padding: 8px 18px; font-size: .78rem; }
.exp-msg { flex-basis: 100%; margin: 0; color: var(--muted); font-size: .85rem; }
.exp-msg:empty { display: none; }
.exp-msg.erro { color: var(--erro); }

/* ---------- resultados ---------- */
.resultados { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }

.item {
  display: flex;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color .15s;
}
.item:hover { border-color: var(--muted); }
.item.marcado { border-color: var(--text); }
.item .check { padding-top: 4px; }
.item .check input { width: 17px; height: 17px; cursor: pointer; }
.item .corpo { flex: 1; min-width: 0; overflow-wrap: anywhere; }

.item h2 { font-size: 1.1rem; font-weight: 500; margin: 0 0 6px; line-height: 1.35; }
.item h2 a { text-decoration: none; }
.item h2 a:hover { opacity: 1; text-decoration: underline; }

.autores { margin: 0; color: var(--muted); font-size: .9rem; font-weight: 300; }
.meta { margin: 6px 0 0; font-size: .85rem; color: var(--muted); display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; }
.meta .journal { font-style: italic; color: var(--text); }

.tag {
  display: inline-block;
  padding: 1px 10px;
  border: 1px solid var(--text);
  border-radius: 999px;
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text);
}

.links { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: .88rem; }

.resumo {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: .95rem;
  font-weight: 300;
}
.resumo h4 { margin: 10px 0 2px; font-size: .82rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }

.paginacao {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 28px 0;
  color: var(--muted);
  font-size: .9rem;
}

.rodape {
  padding-top: 32px;
  padding-bottom: 40px;
  color: var(--muted);
  font-size: .8rem;
  letter-spacing: .04em;
  text-align: center;
}

@media (max-width: 600px) {
  .topo { padding-top: 28px; }
  .selo { width: 150px; height: 150px; }
  .busca .linha { flex-direction: column; }
  body:not(.inicio) .sub { display: none; }
  .barra-exp, .barra-exp select, .barra-exp button { width: 100%; }
  .item { padding: 16px; gap: 10px; }
}