/* ═══════════════════════════════════════════════════════════════
   RESEARCH-INDEX.CSS — Shared styles for research hub/index pages
   Covers: research/index.html, pt/pesquisa/index.html
   ═══════════════════════════════════════════════════════════════ */

/* ── BASE RESET ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--sans);
  font-weight: 300;
  overflow-x: hidden;
  cursor: default;
  line-height: 1.7;
}

/* NOISE OVERLAY */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1000;
  opacity: 0.4;
}

/* ── COMPLIANCE BANNER ── */
.compliance-banner {
  background: #2a0a15;
  color: var(--white);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 8px 48px;
  text-align: center;
  border-bottom: 1px solid rgba(219,38,108,0.3);
  position: sticky;
  top: 0;
  z-index: 1100;
}
.compliance-banner span { color: var(--pink); font-weight: 500; margin-left: 8px; }

/* ── NAV ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 48px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(8,8,8,0.98);
  z-index: 100;
}
.nav-logo {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.nav-logo svg { color: var(--pink); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--gray);
  text-decoration: none;
  transition: color .2s;
}
.nav-links a:hover { color: var(--pink); }
.nav-links a.active { color: var(--pink); }

/* ── CONTAINER ── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 48px;
}

/* ── PAGE HEADER ── */
.page-header {
  padding: 80px 0 48px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}
.page-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--pink-text);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.page-tag::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--pink);
}
.page-title {
  font-family: var(--serif);
  font-size: clamp(36px, 4.5vw, 58px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 16px;
}
.page-title em {
  font-style: italic;
  color: var(--pink);
}
.page-subtitle {
  font-family: var(--sans);
  font-size: 15px;
  color: var(--gray);
  max-width: 640px;
  line-height: 1.7;
}
.page-count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--gray2);
  letter-spacing: .1em;
  margin-top: 16px;
}
.page-count strong {
  color: var(--pink-text);
  font-weight: 500;
}

/* ── ANVISA CALLOUT (PT) ── */
.anvisa-callout {
  background: rgba(255, 165, 0, 0.06);
  border: 1px solid rgba(255, 165, 0, 0.2);
  border-left: 3px solid #f0a030;
  padding: 24px 28px;
  margin-bottom: 48px;
}
.anvisa-callout strong { color: #f0a030; }
.anvisa-callout p { font-size: 13px; color: var(--gray2); line-height: 1.7; margin: 0; }

/* ── FEATURED HERO CARD ── */
.featured-card {
  display: block;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-left: 3px solid var(--pink);
  text-decoration: none;
  color: inherit;
  margin-bottom: 56px;
  transition: border-color .3s, background .3s;
}
.featured-card:hover {
  border-color: var(--pink);
  background: var(--deep);
}
.featured-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--pink-text);
  margin-bottom: 12px;
  display: block;
}
.featured-title {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 400;
  color: var(--white);
  margin-bottom: 10px;
  line-height: 1.3;
}
.featured-desc {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
  max-width: 640px;
}
.featured-meta {
  display: flex;
  gap: 20px;
  margin-top: 14px;
  align-items: center;
}
.featured-meta-item {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray2);
}
.featured-meta-item span { color: var(--gray); }
.featured-arrow {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--pink);
  margin-left: auto;
  transition: transform .2s;
}
.featured-card:hover .featured-arrow { transform: translateX(4px); }

/* ── TOOLS BAR ── */
.tools-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 48px;
}
.tool-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: var(--surface);
  border: 1px solid var(--border2);
  text-decoration: none;
  color: inherit;
  transition: border-color .3s, background .3s;
}
.tool-card:hover {
  border-color: var(--pink);
  background: var(--deep);
}
.tool-card-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--pink-text);
  display: block;
  margin-bottom: 4px;
}
.tool-card-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 400;
  color: var(--white);
}
.tool-card-arrow {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--pink);
  transition: transform .2s;
}
.tool-card:hover .tool-card-arrow {
  transform: translateX(4px);
}

@media (max-width: 768px) {
  .tools-bar { grid-template-columns: 1fr; }
  .tool-card { padding: 16px 20px; }
  .tool-card-title { font-size: 16px; }
}

/* ── CLUSTER NAV ── */
.cluster-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}
.cluster-nav a {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--gray);
  text-decoration: none;
  padding: 8px 16px;
  border: 1px solid var(--border);
  transition: color .2s, border-color .2s, background .2s;
}
.cluster-nav a:hover {
  color: var(--pink);
  border-color: var(--pink);
  background: var(--pink-glow);
}

/* ── CLUSTER SECTION ── */
.cluster {
  margin-bottom: 56px;
}
.cluster-header {
  margin-bottom: 8px;
}
.cluster-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--pink-text);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.cluster-tag::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--pink);
}
.cluster-title {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 6px;
}
.cluster-desc {
  font-size: 14px;
  color: var(--gray);
  max-width: 600px;
  line-height: 1.6;
  margin-bottom: 24px;
}

/* ── ARTICLE GRID ── */
.articles-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.article-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  transition: background .2s;
  align-items: start;
}
.article-card:first-child {
  padding-top: 0;
}
.article-card:hover {
  background: var(--pink-glow);
  margin: 0 -24px;
  padding-left: 24px;
  padding-right: 24px;
}
.article-content {
  flex: 1;
}
.article-category {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--pink-soft);
  padding: 4px 10px;
  border-radius: 2px;
  display: inline-block;
  margin-bottom: 10px;
}
.article-title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  color: var(--white);
  margin-bottom: 6px;
  line-height: 1.3;
}
.article-desc {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.7;
  max-width: 640px;
}
.article-meta {
  display: flex;
  gap: 20px;
  margin-top: 10px;
}
.article-meta-item {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray2);
}
.article-meta-item span {
  color: var(--gray);
}
.article-arrow {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--pink);
  opacity: 0;
  transition: opacity .2s, transform .2s;
  display: inline-block;
  margin-left: 8px;
}
.article-card:hover .article-arrow {
  opacity: 1;
  transform: translateX(4px);
}

/* ── LIBRARY FOOTNOTE ── */
.library-footnote {
  text-align: center;
  padding: 48px 0;
  border-top: 1px solid var(--border);
  margin-top: 16px;
}
.library-footnote p {
  font-size: 14px;
  color: var(--gray);
}
.library-footnote a {
  color: var(--pink);
  text-decoration: none;
}
.library-footnote a:hover { text-decoration: underline; }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-logo {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-logo span { color: var(--pink); }
.footer-links {
  display: flex;
  gap: 32px;
}
.footer-links a {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--gray2);
  text-decoration: none;
  transition: color .2s;
}
.footer-links a:hover { color: var(--pink); }
.footer-social { display: flex; gap: 16px; align-items: center; }
.footer-social a { color: var(--gray2); transition: color .2s; display: flex; align-items: center; }
.footer-social a:hover { color: var(--pink); }
.footer-ruo {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--gray2);
  letter-spacing: .1em;
}

/* ── BACK TO TOP ── */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s, border-color .3s, background .3s;
  z-index: 900;
  text-decoration: none;
  color: inherit;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover {
  border-color: var(--pink);
  background: rgba(219,38,108,0.08);
}
.back-to-top svg {
  width: 18px;
  height: 18px;
  stroke: var(--gray);
  transition: stroke .3s;
}
.back-to-top:hover svg { stroke: var(--pink); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  nav { padding: 16px 20px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 9px; }
  .container { padding: 0 20px; }
  .page-header { padding: 48px 0 32px; margin-bottom: 32px; }
  .page-title { font-size: 32px; }
  .featured-card { padding: 24px; }
  .featured-title { font-size: 22px; }
  .cluster-title { font-size: 22px; }
  .article-title { font-size: 18px; }
  .article-card:hover { margin: 0 -12px; padding-left: 12px; padding-right: 12px; }
  footer { padding: 32px 20px; flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 16px; }
  .cluster-nav a { font-size: 9px; padding: 6px 12px; }
  .anvisa-callout { padding: 16px 20px; }
  .back-to-top { bottom: 24px; right: 24px; width: 40px; height: 40px; }
}

@media (max-width: 480px) {
  .page-title { font-size: 26px; }
  .nav-links a { font-size: 8px; letter-spacing: .1em; }
  .nav-links { gap: 12px; }
  .featured-title { font-size: 20px; }
}