/* =========================================
   BRIGHTSMILE DENTAL — NAVIGATION
   ========================================= */

/* ── Nav Wrapper ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: var(--color-white);
  z-index: var(--z-sticky);
  transition:
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

.nav--scrolled {
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.96);
}

/* ── Nav Inner ── */
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

/* ── Logo ── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
  background-color: var(--color-teal);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  flex-shrink: 0;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-navy);
  line-height: 1.1;
}

.nav__logo-sub {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-normal);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  display: block;
}

/* ── Desktop Links ── */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 8px var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: var(--space-2);
  right: var(--space-2);
  height: 2px;
  background-color: var(--color-teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
  border-radius: var(--radius-pill);
}

.nav__link:hover {
  color: var(--color-teal);
  background-color: var(--color-muted-mint);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__link.is-active {
  color: var(--color-teal);
  font-weight: var(--weight-semibold);
}

.nav__link.is-active::after {
  transform: scaleX(1);
}

.nav__link:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 2px;
}

/* ── Nav Actions ── */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__phone {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-navy);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav__phone:hover {
  color: var(--color-teal);
}

.nav__phone svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ── Hamburger ── */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background-color var(--transition-fast);
}

.nav__hamburger:hover {
  background-color: var(--color-soft-blue);
}

.nav__hamburger:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 2px;
}

.nav__hamburger-bar {
  width: 22px;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: var(--radius-pill);
  transition:
    transform var(--duration-base) var(--ease-in-out),
    opacity var(--duration-base) var(--ease-in-out);
  transform-origin: center;
}

/* Hamburger → X */
.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Menu ── */
.nav__mobile-menu {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: var(--color-white);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-in-out);
}

.nav__mobile-menu.is-open {
  max-height: calc(100vh - var(--nav-height) - var(--banner-height, 0px));
  overflow-y: auto;
}

.nav.has-banner ~ #mobile-menu.is-open,
.nav__mobile-menu.is-open {
  max-height: calc(100vh - var(--nav-height) - var(--banner-height, 0px));
}

.nav__mobile-menu-inner {
  padding: 12px 12px 20px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav__mobile-link {
  display: flex;
  align-items: center;
  padding: 13px 14px;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav__mobile-link:hover,
.nav__mobile-link.is-active {
  background-color: var(--color-soft-blue);
  color: var(--color-teal);
}

.nav__mobile-link.is-active {
  font-weight: var(--weight-semibold);
}

.nav__mobile-divider {
  border-top: 1px solid var(--color-border);
  margin: 8px 4px;
}

.nav__mobile-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 4px;
}

.nav__mobile-phone {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 14px;
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-navy);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.nav__mobile-phone:hover {
  background-color: var(--color-soft-blue);
  border-color: var(--color-teal);
}

.nav__mobile-actions .btn {
  width: 100%;
  justify-content: center;
  padding-block: 14px;
}

/* ── Emergency Badge in Nav ── */
.nav__emergency-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background-color: #FEF2F2;
  color: var(--color-error);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-pill);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast);
}

.nav__emergency-badge:hover {
  background-color: #FEE2E2;
  color: var(--color-error);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .nav__links {
    display: none;
  }

  .nav__actions .btn {
    display: none;
  }

  .nav__phone {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }
}

@media (min-width: 1025px) {
  .nav__mobile-menu {
    display: none;
  }
}

/* Body padding for fixed nav */
body {
  padding-top: var(--nav-height);
}

/* When emergency banner is showing, add extra offset */
body.has-emergency-banner {
  padding-top: calc(var(--nav-height) + var(--banner-height));
}

.nav.has-banner {
  top: var(--banner-height);
}

/* ── Mobile banner + menu positioning ── */
@media (max-width: 1024px) {
  /* Hide long descriptive text in banner — keep icon + bold label + phone */
  .banner-detail {
    display: none;
  }

  /* Mobile menu must sit below nav which itself sits below banner */
  .nav__mobile-menu {
    top: var(--nav-height);
  }

  .nav.has-banner ~ #mobile-menu,
  body.has-emergency-banner .nav__mobile-menu {
    top: calc(var(--nav-height) + var(--banner-height));
  }
}