/* ============================================
   Elegant Stone — Navigation Bar
   ============================================ */

.es-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding-inline: var(--container-padding);
  background: transparent;
  transition:
    background-color var(--duration-short) var(--ease-standard),
    box-shadow var(--duration-short) var(--ease-standard),
    backdrop-filter var(--duration-short) var(--ease-standard);
}

.es-nav.is-scrolled {
  background: var(--color-overlay-heavy);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  box-shadow: var(--shadow-1), 0 1px 0 var(--color-border);
}

.es-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
}

/* ── Logo ─────────────────────────────────── */

.es-nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  z-index: 1001;
}

.es-nav__logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.es-nav__logo-icon svg {
  width: 100%;
  height: 100%;
  fill: var(--color-on-media-accent);
  transition: fill var(--duration-short) var(--ease-standard);
}

/* Before scroll: nav is transparent over hero — force bright white text */
.es-nav__logo-text {
  font-family: var(--font-display);
  font-size: var(--text-title-lg);
  font-weight: 500;
  color: var(--color-on-media);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  transition: color var(--duration-short) var(--ease-standard);
}

.es-nav__logo-text span {
  color: var(--color-on-media-accent);
  transition: color var(--duration-short) var(--ease-standard);
}

/* After scroll: nav has backdrop — use theme colors */
.es-nav.is-scrolled .es-nav__logo-text {
  color: var(--color-text-primary);
}

.es-nav.is-scrolled .es-nav__logo-text span {
  color: var(--color-gold);
}

.es-nav__logo:hover .es-nav__logo-icon svg {
  fill: var(--color-gold-light);
}

/* ── Desktop Links ────────────────────────── */

.es-nav__links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

/* Before scroll: force bright link colors over hero */
.es-nav__link {
  position: relative;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-label-lg);
  font-weight: 400;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-on-media-subtle);
  transition: color var(--duration-short) var(--ease-standard);
  white-space: nowrap;
}

/* After scroll: use theme colors */
.es-nav.is-scrolled .es-nav__link {
  color: var(--color-text-secondary);
}

.es-nav.is-scrolled .es-nav__logo-icon svg {
  fill: var(--color-gold);
}

.es-nav.is-scrolled .es-theme-toggle {
  color: var(--color-text-secondary);
}

.es-nav.is-scrolled .es-nav__hamburger-line {
  background: var(--color-text-primary);
}

.es-nav__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: var(--space-4);
  right: var(--space-4);
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-short) var(--ease-standard);
}

.es-nav__link:hover,
.es-nav__link.is-active {
  color: var(--color-on-media-accent);
}

.es-nav.is-scrolled .es-nav__link:hover,
.es-nav.is-scrolled .es-nav__link.is-active {
  color: var(--color-gold);
}

.es-nav__link:hover::after,
.es-nav__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ── Actions (Theme Toggle) ───────────────── */

.es-nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  z-index: 1001;
}

.es-theme-toggle {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-on-media-subtle);
  transition:
    color var(--duration-micro) var(--ease-standard),
    background-color var(--duration-micro) var(--ease-standard);
}

.es-theme-toggle:hover {
  color: var(--color-gold);
  background-color: var(--color-glow);
}

.es-theme-toggle svg {
  width: 20px;
  height: 20px;
}

.es-theme-toggle__sun,
.es-theme-toggle__moon {
  display: none;
}

[data-theme="dark"] .es-theme-toggle__sun { display: block; }
[data-theme="dark"] .es-theme-toggle__moon { display: none; }
[data-theme="light"] .es-theme-toggle__sun { display: none; }
[data-theme="light"] .es-theme-toggle__moon { display: block; }

/* ── Hamburger ────────────────────────────── */

.es-nav__hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  gap: var(--space-1);
  z-index: 1001;
}

.es-nav__hamburger-line {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-on-media);
  transition:
    transform var(--duration-short) var(--ease-standard),
    opacity var(--duration-micro) var(--ease-standard);
}

.es-nav__hamburger.is-active .es-nav__hamburger-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.es-nav__hamburger.is-active .es-nav__hamburger-line:nth-child(2) {
  opacity: 0;
}

.es-nav__hamburger.is-active .es-nav__hamburger-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── Mobile Menu Overlay ──────────────────── */

.es-nav__mobile {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: var(--color-bg-primary);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--duration-medium) var(--ease-standard),
    visibility var(--duration-medium) var(--ease-standard);
}

.es-nav__mobile.is-open {
  opacity: 1;
  visibility: visible;
}

.es-nav__mobile-link {
  font-family: var(--font-display);
  font-size: var(--text-headline-md);
  font-weight: 400;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-secondary);
  padding: var(--space-3) var(--space-6);
  transition:
    color var(--duration-micro) var(--ease-standard),
    transform var(--duration-short) var(--ease-decelerate);
  transform: translateY(20px);
  opacity: 0;
}

.es-nav__mobile.is-open .es-nav__mobile-link {
  transform: translateY(0);
  opacity: 1;
}

.es-nav__mobile.is-open .es-nav__mobile-link:nth-child(1) { transition-delay: 50ms; }
.es-nav__mobile.is-open .es-nav__mobile-link:nth-child(2) { transition-delay: 100ms; }
.es-nav__mobile.is-open .es-nav__mobile-link:nth-child(3) { transition-delay: 150ms; }
.es-nav__mobile.is-open .es-nav__mobile-link:nth-child(4) { transition-delay: 200ms; }
.es-nav__mobile.is-open .es-nav__mobile-link:nth-child(5) { transition-delay: 250ms; }
.es-nav__mobile.is-open .es-nav__mobile-link:nth-child(6) { transition-delay: 300ms; }

.es-nav__mobile-link:hover,
.es-nav__mobile-link.is-active {
  color: var(--color-gold);
}

/* ── Solid Nav (Inner Pages) ──────────────── */
/* Inner pages have lighter heroes — nav uses
   theme-aware colors from the start, no scroll
   color transition needed. */

.es-nav[data-nav-style="solid"] {
  background: var(--color-overlay-heavy);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  box-shadow: var(--shadow-1), 0 1px 0 var(--color-border);
}

.es-nav[data-nav-style="solid"] .es-nav__logo-text {
  color: var(--color-text-primary);
}

.es-nav[data-nav-style="solid"] .es-nav__logo-text span {
  color: var(--color-gold);
}

.es-nav[data-nav-style="solid"] .es-nav__logo-icon svg {
  fill: var(--color-gold);
}

.es-nav[data-nav-style="solid"] .es-nav__link {
  color: var(--color-text-secondary);
}

.es-nav[data-nav-style="solid"] .es-nav__link:hover,
.es-nav[data-nav-style="solid"] .es-nav__link.is-active {
  color: var(--color-gold);
}

.es-nav[data-nav-style="solid"] .es-theme-toggle {
  color: var(--color-text-secondary);
}

.es-nav[data-nav-style="solid"] .es-nav__hamburger-line {
  background: var(--color-text-primary);
}

/* ── Desktop Breakpoint ───────────────────── */

@media (min-width: 1024px) {
  .es-nav__links {
    display: flex;
  }

  .es-nav__hamburger {
    display: none;
  }

  .es-nav__mobile {
    display: none;
  }
}