:root {
  --azul: #1e3c72;
  --azul-claro: #eaf2fb;
  --borde: #ddd;
  --fondo-guia: #fafafa;
  --texto: #222;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--texto);
  background: #fff;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--azul);
  color: #fff;
}

.topbar-titulo { font-size: 18px; font-weight: 600; }

.volver {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  padding: 7px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}
.volver:hover { background: rgba(255, 255, 255, 0.28); }

.layout {
  display: flex;
  min-height: calc(100vh - 54px);
}

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--azul-claro);
  padding: 16px 12px;
  border-right: 1px solid var(--borde);
}

.buscador {
  width: 100%;
  padding: 10px 12px;
  font-size: 15px;
  border: 1px solid var(--borde);
  border-radius: 8px;
  margin-bottom: 14px;
}

.nav { display: flex; flex-direction: column; gap: 4px; }

.nav-item {
  text-align: left;
  background: none;
  border: none;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 15px;
  cursor: pointer;
  color: var(--texto);
}
.nav-item:hover { background: rgba(30, 60, 114, 0.1); }
.nav-item.activo { background: var(--azul); color: #fff; font-weight: 600; }

.contenido {
  flex: 1;
  padding: 20px 28px;
  max-width: 820px;
}

.contenido h2 { color: var(--azul); margin-top: 0; }
.resultado-seccion { color: var(--azul); margin: 22px 0 8px; }

.guia {
  margin-bottom: 14px;
  border: 1px solid var(--borde);
  border-radius: 10px;
  padding: 4px 18px;
  background: var(--fondo-guia);
}

.guia summary {
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  padding: 10px 0;
}

.guia-pasos { margin-top: 4px; padding-bottom: 12px; }

.paso { margin-bottom: 6px; }
.paso p { font-size: 16px; line-height: 1.5; margin: 0 0 4px 0; }
.paso img {
  max-width: 100%;
  border: 1px solid var(--borde);
  border-radius: 8px;
  margin: 8px 0 18px 0;
  display: block;
}

.sin-resultados, .aviso {
  font-size: 16px;
  color: #555;
  padding: 20px;
}

@media (max-width: 720px) {
  .layout { flex-direction: column; }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--borde);
  }
  .nav { flex-direction: row; flex-wrap: wrap; }
  .contenido { padding: 16px; max-width: 100%; }
}