/* ==========================================================================
   BASE DAS PÁGINAS INTERNAS (programacao.html, temas-livres.html)
   Paleta e botões herdados do index.html, variante photo-bg — a usada no site.
   ========================================================================== */

:root {
  --accent: #3D5AFE;
  --accent-rgb: 61, 90, 254;
  --bg: #0A2A58;
  --text-hi: #F4F5F9;
  --text-mid: #B7C3DD;
  --text-low: #8CA0C4;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; overflow-x: clip; }

a { text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 550;
  cursor: pointer;
  border: none;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}

.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 4px 18px rgba(var(--accent-rgb), .35);
}

.btn-accent:hover { transform: translateY(-1px); }

.btn-nav { padding: 13px 24px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .btn-accent:hover { transform: none; }
}