/* Navbar container basic positioning */
.navbar {
  position: sticky;
  top: 0px;
  z-index: 999;
  width: 100%;
  box-sizing: border-box;
}

/* Container centering and spacing */
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: var(--space-m);
  align-items: center;
  padding: 0 var(--space-m);
  box-sizing: border-box;
  position: relative;
}

/* Menu list */
.nav-menu {
  list-style: none;
  display: flex;
  gap: var(--space-m);
  margin: 0;
  padding: 0;
  align-items: center;
  flex-wrap: wrap;
}

/* Individual items */
.nav-item {
  margin: 0;
}

/* Links */
.nav-link {
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--fs-m);
  font-weight: 600;
  padding: 0.5em 0.875em;
  border-radius: 0.5em;
  position: relative;
  transition: background 0.22s ease, color 0.22s ease, transform 0.12s ease;
  outline: none;
}

/* Hover and keyboard focus for links */
.nav-link:hover,
.nav-link:focus-visible {
  background: var(--color-button-hover);
  color: var(--color-text);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
}

.nav-link:focus-visible {
  box-shadow: 0 0 0 3px rgba(255,111,97,0.12), 0 4px 10px rgba(0,0,0,0.06);
}

/* Active link style */
.nav-link[aria-current="page"],
.nav-link.active {
  color: var(--color-text);
  background: linear-gradient(0deg, rgba(255,111,97,0.06), rgba(255,111,97,0.02));
}

/* Subtle underline accent */
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  bottom: -0.45rem;
  height: 3px;
  width: 60%;
  background: var(--color-accent);
  border-radius: 2px;
  transition: transform 0.22s ease;
  transform-origin: center;
  pointer-events: none;
  opacity: 0;
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
  opacity: 1;
}

/* Menu toggle button with three horizontal bars */
.menu-toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  background: var(--color-button);
  color: var(--color-text);
  border: none;
  border-radius: 0.5rem;
  padding: 0;
  cursor: pointer;
  position: absolute;
  top: calc(var(--space-s) + 0.25rem);
  right: calc(var(--space-s) + 0.25rem);
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
   /* above overlay and menu */
  z-index: 9999;
}

/* keyboard focus for button */
.menu-toggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255,111,97,0.12);
}

/* common bar style */
.menu-toggle .bar {
  position: absolute;
  left: 0.6rem;
  right: 0.6rem;
  height: 0.18rem;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: background-color 0.12s ease, transform 0.12s ease;
  box-sizing: border-box;
}

/* evenly spaced rows at 25%, 50%, 75% so bars sit equal from edges */
.menu-toggle .bar:nth-child(1) {
  top: 25%;
  transform: translateY(-50%);
}
.menu-toggle .bar:nth-child(2) {
  top: 50%;
  transform: translateY(-50%);
}
.menu-toggle .bar:nth-child(3) {
  top: 75%;
  transform: translateY(-50%);
}

/* hover and focus color */
.menu-toggle:hover .bar,
.menu-toggle:focus-visible .bar {
  background-color: var(--color-accent);
}

/* small screen adjustments */
@media (max-width: var(--bp-tablet)) {
  .nav-container {
    justify-content: center;
    padding: 0 var(--space-s);
  }

  .nav-menu {
    gap: calc(var(--space-s) - 0.125rem);
  }

  .nav-link {
    font-size: var(--fs-s);
    padding: 0.45em 0.6em;
  }

  .nav-menu {
    justify-content: center;
  }
}

/* Very small screens: show button, hide menu until toggle */
/* When shown, menu becomes a fixed panel with a background and a full-screen overlay created by JS */
@media (max-width: 36rem) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    width: auto;
    align-items: center;
    padding: 0;
    margin: 0;
  }

  .nav-container.menu-open .menu-toggle {
    display: none;
  }

  .nav-menu.show {
    display: flex;
    position: fixed;
    width: 100%;
    background: var(--color-panel);
    padding: calc(var(--space-s) + 0.25rem);
    box-shadow: 0 12px 30px rgba(0,0,0,0.45);
    transition: opacity 160ms ease, transform 160ms ease;
    opacity: 1;
    z-index: 999;
  }

  /* menu links inside the panel */
  .nav-link {
    display: block;
    width: 100%;
    padding: 0.75em 1rem;
    border-radius: calc(var(--radius) / 2);
    text-align: center;
  }

  .nav-link + .nav-link {
    margin-top: 0.25rem;
  }

  .nav-container {
    padding-left: calc(var(--space-s) + 0.25rem);
    padding-right: calc(var(--space-s) + 0.25rem);
  }
}

/* Desktop and larger screens: reapply visual styles */
@media (min-width: 36rem) {
  .navbar {
    background-color: var(--color-panel);
    box-shadow: var(--shadow-soft);
    padding: calc(var(--space-s) + 1rem);
    border-radius: 0;
  }

  .menu-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    flex-direction: row;
  }
}

/* overlay element added by JS */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 998; /* sits below the menu but above the page */
}

/* Print friendly */
@media print {
  .navbar {
    position: static;
    box-shadow: none;
    background: none;
    padding: 0;
  }

  .nav-link::after {
    display: none;
  }
}