/* ==========================================================================
   nav.css — Barra de navegación sticky
   ========================================================================== */

.nav {
  --nav-bg: rgba(245, 245, 247, 0.82);
  --nav-bg-dark: rgba(28, 28, 30, 0.82);

  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background-color: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--duration-base) var(--ease-out),
    background-color var(--duration-base) var(--ease-out);
}

.nav--scrolled {
  border-bottom-color: var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* --- Logo --- */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img {
  height: 44px;
  width: auto;
}

.nav__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  align-items: end;
}

.nav__logo-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.nav__logo-tagline {
  font-size: var(--text-caption);
  color: var(--ink-2);
  font-weight: 400;
}

/* --- Links --- */
.nav__links {
  display: none;
  list-style: none;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 768px) {
  .nav__links {
    display: flex;
  }
}

.nav__link {
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
  padding-block: var(--space-2);
}

.nav__link:hover {
  color: var(--accent);
}

.nav__link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

/* --- Toggle de tema (sol / luna) --- */
.nav__theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
  transition:
    background-color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.nav__theme-toggle:hover {
  background-color: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

.nav__theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.nav__theme-icon {
  width: 16px;
  height: 16px;
  display: block;
}

/* En modo día se ve la luna (para cambiar a noche) */
.nav__theme-icon--sun {
  display: none;
}

.nav__theme-icon--moon {
  display: block;
}

/* En modo noche se ve el sol (para cambiar a día) */
[data-theme="dark"] .nav__theme-icon--sun {
  display: block;
}

[data-theme="dark"] .nav__theme-icon--moon {
  display: none;
}

/* --- CTA whatsapp en nav --- */
.nav__cta {
  display: none;
}

@media (min-width: 768px) {
  .nav__cta {
    display: inline-flex;
  }
}

/* --- Botón hamburguesa (mobile) --- */
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color var(--duration-fast) var(--ease-out);
}

.nav__toggle:hover {
  background-color: var(--accent-light);
}

.nav__toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.nav__toggle-line {
  display: block;
  height: 1.5px;
  background-color: var(--ink);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
  transform-origin: center;
}

/* Animación a X cuando está abierto */
.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

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

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }
}

/* --- Menú mobile --- */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--canvas);
  border-bottom: 1px solid var(--line);
  padding: var(--space-6) var(--gutter) var(--space-8);
  z-index: 99;
}

.nav__mobile-menu.is-open {
  display: block;
}

.nav__mobile-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.nav__mobile-link {
  font-size: var(--text-body);
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  display: block;
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--line);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__mobile-link:hover {
  color: var(--accent);
}

[data-theme="dark"] .nav {
  --nav-bg: var(--nav-bg-dark);
}