/*
 * mh-site-shell.css — casca das paginas publicas do MargemHub.
 *
 * Usado por api-mercadolivre/changelog.php. A landing (landing.php) mantem o
 * proprio <style> inline: ela ja estava em producao e extrair 1.100 linhas de
 * CSS dela so para compartilhar a casca seria risco sem retorno.
 *
 * Os tokens abaixo ESPELHAM os de landing.php. Ao mexer na paleta, mude nos
 * dois lugares — se divergirem, o changelog aparece com outro tema.
 */

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

:root {
  --bg: #0b0e14;
  --surface: #10141c;
  --card: #131820;
  --border: rgba(120,145,170,0.13);
  --border-mid: rgba(120,145,170,0.2);
  --text: #eef0ef;
  --muted: #8fa3a0;
  --accent: #5dcaa5;
  --accent-dark: #1d9e75;
  --accent-glow: rgba(93,202,165,0.18);
  font-family: Inter, system-ui, -apple-system, sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 64px);
  height: 76px;
  background: rgba(11,14,20,0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 0;
}
.nav-logo img {
  height: 52px;
  width: auto;
  display: block;
}
.nav-logo--with-version {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  line-height: normal;
}
.nav-logo--with-version img {
  height: 47px;
}
.nav-logo__version {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-end;
  min-width: 42px;
  padding: 0.06rem 0.42rem;
  border-radius: 999px;
  border: 1px solid rgba(179, 195, 188, 0.22);
  background: rgba(179, 195, 188, 0.08);
  color: rgba(179, 195, 188, 0.78);
  font-size: 0.46rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  margin: 0 auto;
}
.nav-links a {
  position: relative;
  padding: 6px 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s ease;
}
.nav-links a:hover, .nav-links a.is-current { color: var(--text); }
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform .18s ease;
}
.nav-links a:hover::after, .nav-links a.is-current::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-ghost {
  height: 38px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--border-mid);
  background: transparent;
  color: var(--muted);
  font: 600 0.88rem/1 Inter, sans-serif;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.btn-ghost:hover { color: var(--text); border-color: rgba(120,145,170,0.35); background: rgba(255,255,255,0.04); }

.btn-primary {
  height: 38px;
  padding: 0 20px;
  border-radius: 8px;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #061510;
  font: 700 0.9rem/1 Inter, sans-serif;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 20px rgba(29,158,117,0.22);
  transition: filter 0.15s, transform 0.15s;
}
.btn-primary:hover { filter: brightness(1.06); transform: translateY(-1px); }
.btn-primary:active { transform: none; }

/* ── PAGINA ── */
.page {
  flex: 1;
  padding: 132px clamp(20px, 5vw, 64px) 72px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.15;
  max-width: 640px;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 0.98rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 620px;
  margin-bottom: 40px;
}

/* ── CHANGELOG ── */
.changelog-list { display: grid; gap: 14px; max-width: 820px; }
.changelog-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 20px 24px;
}
.changelog-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 6px;
}
.changelog-date {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.changelog-version {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid var(--border-mid);
  background: var(--surface);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.changelog-title { font-size: 1.05rem; font-weight: 800; margin-bottom: 6px; }
.changelog-desc { font-size: 0.92rem; color: var(--muted); line-height: 1.6; }

/* ── FOOTER ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px clamp(20px, 5vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo img { height: 26px; opacity: 0.7; }
.footer-copy { font-size: 0.78rem; color: var(--muted); }
.footer-links { display: flex; gap: 20px; }
.footer-links a {
  font-size: 0.8rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--text); }

/* Mesmo breakpoint da landing: cinco links deixam de caber bem antes do
   tamanho de celular. */
@media (max-width: 980px) {
  .nav-links {
    position: absolute;
    top: 76px;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 6px 0 10px;
    background: rgba(11,14,20,0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
  }
  .nav-links:not(.is-open) { display: none; }
  .nav-links a { padding: 13px clamp(20px, 5vw, 64px); }
  .nav-links a::after { display: none; }
  .nav-toggle { display: inline-flex; }
}

@media (max-width: 640px) {
  .nav-cta .btn-ghost { display: none; }
  .footer { flex-direction: column; align-items: flex-start; }
}