/* Barra superior: logo, navegación, menú móvil, ubicación */
.topbar {
  position: fixed;
  top: 0;
  z-index: 10;
  width: 100%;
  padding: 8px 6vw;
  display: flex;
  align-items: center;
  background: var(--accent);
  color: var(--paper);
  font: 10px "DM Mono", monospace;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.logo {
  display: flex;
  align-items: center;
  height: 120px;
  flex: none;
}

.logo img {
  height: 100%;
  width: auto;
  display: block;
}

.topbar nav {
  margin-left: auto;
}

.topbar nav a {
  color: inherit;
  text-decoration: none;
  margin-left: 23px;
  opacity: .65;
}

.topbar nav a.active,
.topbar nav a:hover {
  opacity: 1;
}

.location {
  margin-left: 28px;
  white-space: nowrap;
}

/* Botón de hamburguesa: oculto en escritorio, solo se usa en móvil */
.nav-toggle {
  display: none;
  position: relative;
  z-index: 11;
  width: 30px;
  height: 30px;
  margin-left: auto;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  position: absolute;
  left: 4px;
  right: 4px;
  height: 1px;
  background: var(--paper);
  transition: transform .25s ease, opacity .2s ease, top .25s ease, background .2s ease;
}

/* Con el menú abierto, la "X" queda sobre el panel oscuro, no sobre el header naranja */
.nav-toggle[aria-expanded="true"] span {
  background: var(--ink);
}

.nav-toggle span:nth-child(1) { top: 10px; }
.nav-toggle span:nth-child(2) { top: 15px; }
.nav-toggle span:nth-child(3) { top: 20px; }

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  top: 15px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  top: 15px;
  transform: rotate(-45deg);
}

@media (max-width: 720px) {
  .topbar {
    padding: 10px 22px;
  }

  .logo {
    height: 52px;
  }

  .topbar nav {
    position: fixed;
    inset: 0;
    z-index: 9;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 24px;
    margin-left: 0;
    padding: 0 32px;
    background: var(--paper);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform .35s ease, opacity .3s ease;
  }

  .topbar nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .topbar nav a {
    margin-left: 0;
    font-size: 15px;
    /* El panel del menú móvil es oscuro (no naranja como el header),
       así que aquí el texto necesita volver a ser claro. */
    color: var(--ink);
  }

  .nav-toggle {
    display: block;
  }

  .location {
    display: none;
  }
}

body.nav-open {
  overflow: hidden;
}

@media (max-width: 480px) {
  .topbar {
    padding: 8px 16px;
  }

  .logo {
    height: 46px;
  }
}