#top-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: 54px; display: flex; align-items: center; gap: 12px;
  padding: 0 14px;
  background: transparent;
  transition: background .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
#top-nav.solid {
  background: var(--tabs-bg);
  border-color: var(--border);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
}
.nav-back {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--glass-bg); border: none;
  color: var(--text); font-size: 15px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(8px); text-decoration: none; transition: background .2s;
}
.nav-back:hover { background: var(--glass-hover); }
#nav-title {
  font-family: 'Bebas Neue', sans-serif; font-size: 19px; letter-spacing: 1px;
  opacity: 0; transition: opacity .25s; flex: 1;
}
#nav-title.show { opacity: 1; }
.nav-right { margin-left: auto; display: flex; gap: 8px; }
.nav-icon {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--glass-bg); border: none;
  color: var(--text); font-size: 15px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(8px); transition: background .2s;
}
.nav-icon:hover { background: var(--glass-hover); }

/* ── Modo de busca ── */
.nav-search-bar {
  flex: 1; display: none; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 22px; padding: 0 12px; height: 38px;
  animation: nav-search-in .18s ease;
}
@keyframes nav-search-in {
  from { opacity: 0; transform: scaleX(.92); }
  to   { opacity: 1; transform: scaleX(1); }
}
.nav-search-icon { color: var(--muted); font-size: 13px; flex-shrink: 0; }
#nav-search-input {
  flex: 1; border: none; background: transparent; color: var(--text);
  font-size: 14px; outline: none; min-width: 0;
}
#nav-search-input::placeholder { color: var(--muted); }
.nav-search-close {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--chip-bg); border: none; color: var(--muted);
  font-size: 11px; cursor: pointer; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s;
}
.nav-search-close:hover { background: var(--border); }

#top-nav.search-mode #nav-title,
#top-nav.search-mode #nav-back-btn,
#top-nav.search-mode .nav-right { display: none; }
#top-nav.search-mode .nav-search-bar { display: flex; }