header {
  border-bottom: 1px solid var(--linea);
  padding: 20px 28px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

header h1 { font-size: 17px; font-weight: 600; margin: 0; letter-spacing: 0.2px; }

header .usuario { font-size: 13px; color: var(--texto-tenue); }

header .usuario button {
  margin-left: 12px;
  background: none;
  border: 1px solid var(--linea);
  color: var(--texto-tenue);
  padding: 4px 10px;
  border-radius: var(--radio);
  cursor: pointer;
  font-size: 12px;
}
header .usuario button:hover { border-color: var(--texto-tenue); color: var(--texto); }

main { max-width: 1040px; margin: 0 auto; padding: 32px 28px 100px; }

#vista-login { max-width: 340px; margin: 12vh auto; }
#vista-login h2 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
#vista-login p.sub { color: var(--texto-tenue); font-size: 13px; margin: 0 0 24px; }

nav.tabs {
  display: flex;
  gap: 24px;
  border-bottom: 1px solid var(--linea);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
nav.tabs button {
  background: none;
  border: none;
  color: var(--texto-tenue);
  font-size: 14px;
  padding: 10px 0;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
nav.tabs button.activo { color: var(--texto); border-bottom-color: var(--ambar); }

section.vista { display: none; }
section.vista.activa { display: block; }

h3.titulo-seccion {
  font-size: 13px;
  color: var(--texto-tenue);
  font-weight: 600;
  margin: 0 0 12px;
}

.fila-encabezado {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}