/* navbar.css — fixed mobile overlay, white navbar, black text, logo fits navbar
   UPDATE (mobile not clickable fix):
   - Make nav links reliably tappable on iOS by ensuring a positioning context
   - Prevent ::after underline from intercepting taps
   - Ensure navbar layers sit above hero decorative layers
   - Remove “ghost overlay” risk by hard-disabling pointer-events when closed
   - Improve tap responsiveness (touch-action) without changing design
*/

:root {
  --navbar-height: 72px;
  --navbar-hit: 52px;                 /* tap target */
  --navbar-radius: 10px;

  --navbar-bg: rgba(255, 255, 255, 0.92);
  --navbar-bg-scrolled: rgba(255, 255, 255, 0.98);
  --navbar-border: rgba(0, 0, 0, 0.10);

  --navbar-text: #111111;
  --navbar-text-hover: #007AFF;
  --navbar-text-active: #007AFF;

  --navbar-backdrop-blur: blur(20px);
  --navbar-transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --navbar-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);

  --navbar-mobile-bg: rgba(255, 255, 255, 0.98);
  --navbar-mobile-backdrop: blur(40px);
}

/* =========================
   NAVBAR CONTAINER
========================= */

.navbar {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: var(--navbar-height);
  background: var(--navbar-bg);
  backdrop-filter: var(--navbar-backdrop-blur);
  -webkit-backdrop-filter: var(--navbar-backdrop-blur);
  border-bottom: 1px solid var(--navbar-border);

  /* UPDATE: keep navbar above any hero decorative layers */
  z-index: 3000;

  transition: var(--navbar-transition);
  will-change: background-color, box-shadow, transform;

  /* CRITICAL FIX: do NOT clip overlays */
  overflow: visible;

  /* UPDATE: makes taps feel more reliable on mobile */
  touch-action: manipulation;
}

.navbar.scrolled {
  background: var(--navbar-bg-scrolled);
  box-shadow: var(--navbar-shadow);
}

.navbar.hidden { transform: translateY(-100%); }

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* =========================
   LOGO — FITS NAVBAR HEIGHT
========================= */

.navbar-logo {
  flex-shrink: 0;
}

.navbar-logo-link {
  display: flex;
  align-items: center;

  /* Match the vertical rhythm of the navbar buttons */
  height: var(--navbar-hit);

  text-decoration: none;

  /* UPDATE: ensure link is always tappable */
  position: relative;
  z-index: 1;
  touch-action: manipulation;
}

.navbar-logo-img {
  /* Match the button height so the logo sits on the same visual baseline */
  height: calc(var(--navbar-hit) - 2px);
  width: auto;
  display: block;
}

/* =========================
   DESKTOP MENU
========================= */

.navbar-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 8px;
  align-items: center;
}

.navbar-link{
  display: flex;
  align-items: center;
  height: var(--navbar-hit);
  padding: 0 16px;
  text-decoration: none;
  color: var(--navbar-text);
  font-weight: 500;
  font-size: 0.95rem;
  line-height: 1;
  border-radius: var(--navbar-radius);
  transition: var(--navbar-transition);
  white-space: nowrap;

  /* UPDATE: required because you use position:absolute in ::after */
  position: relative;

  /* UPDATE: keep above any accidental overlapping layers */
  z-index: 1;

  /* UPDATE: makes iOS taps/snaps more consistent */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.navbar-link:hover{
  color: var(--navbar-text-hover);
  background: rgba(0, 122, 255, 0.08);
}

.navbar-link.active{
  color: var(--navbar-text-active);
  background: rgba(0, 122, 255, 0.12);
  font-weight: 600;
}

/* underline indicator */
.navbar-link.active::after{
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--navbar-text-active);
  border-radius: 1px;

  /* UPDATE: never let decorative layers steal taps */
  pointer-events: none;
}

/* =========================
   MOBILE MENU BUTTON
========================= */

.mobile-menu-btn{
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: var(--navbar-hit);
  height: var(--navbar-hit);
  cursor: pointer;
  border-radius: var(--navbar-radius);
  transition: var(--navbar-transition);
  background: transparent;
  border: none;
  padding: 0;

  /* UPDATE: ensure it is tappable above any overlapping content */
  position: relative;
  z-index: 1;

  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-menu-btn:hover { background: rgba(0, 0, 0, 0.05); }

.hamburger-line{
  width: 20px;
  height: 2px;
  background: var(--navbar-text);
  border-radius: 1px;
  transition: var(--navbar-transition);
  margin: 2px 0;
  transform-origin: center;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

.mobile-menu-btn.active .hamburger-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.6);
}

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* =========================
   MOBILE MENU OVERLAY (ABOVE NAVBAR)
========================= */

.mobile-menu-overlay{
  position: fixed;
  inset: 0;
  background: var(--navbar-mobile-bg);
  backdrop-filter: var(--navbar-mobile-backdrop);
  -webkit-backdrop-filter: var(--navbar-mobile-backdrop);

  /* CRITICAL FIX: must be above navbar */
  z-index: 4000;

  opacity: 0;
  visibility: hidden;

  /* UPDATE: hard-disable hit testing when closed */
  pointer-events: none;

  transition: opacity 0.25s ease, visibility 0.25s ease;

  overflow-y: auto;
  -webkit-overflow-scrolling: touch;

  /* UPDATE: prevent “transparent overlay eats taps” edge cases */
  touch-action: pan-y;
}

.mobile-menu-overlay.active{
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-menu{
  padding: 24px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.mobile-menu-header{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0 24px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  margin-bottom: 20px;
}

.mobile-logo{
  height: 34px;
  width: auto;
}

.mobile-close-btn{
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--navbar-hit);
  height: var(--navbar-hit);
  background: transparent;
  border: none;
  border-radius: var(--navbar-radius);
  color: var(--navbar-text);
  font-size: 1.25rem;
  cursor: pointer;
  transition: var(--navbar-transition);

  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-close-btn:hover{
  background: rgba(0, 0, 0, 0.05);
  color: var(--navbar-text-hover);
}

.mobile-menu-list{
  list-style: none;
  margin: 0;
  padding: 0;
  flex-grow: 1;
}

.mobile-menu-item{
  opacity: 1;           /* keep simple + reliable */
  transform: none;
}

.mobile-menu-link{
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--navbar-text);
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1.3;
  padding: 18px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: var(--navbar-transition);

  /* UPDATE: same tap reliability hardening */
  position: relative;
  z-index: 1;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-menu-link:hover{
  color: var(--navbar-text-hover);
  padding-left: 8px;
}

.mobile-menu-link.active{
  color: var(--navbar-text-active);
  font-weight: 600;
}

/* =========================
   SCROLL PROGRESS
========================= */

.scroll-progress{
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: transparent;
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 0.1s ease-out;
  opacity: 0;
  visibility: hidden;

  /* UPDATE: never intercept taps */
  pointer-events: none;
}

.navbar.scrolled .scroll-progress{
  opacity: 1;
  visibility: visible;
  background: linear-gradient(90deg, var(--navbar-text-hover), #0051D5);
}

/* =========================
   RESPONSIVE
========================= */

@media (max-width: 1024px){
  .navbar-container { padding: 0 20px; }
  .navbar-link { padding: 0 12px; font-size: 0.9rem; }
}

@media (max-width: 768px) {
  .navbar-menu { display: none; }
  .mobile-menu-btn { display: flex; }
  .navbar-container { padding: 0 16px; }

  /* When mobile menu is open, centre the logo without shifting the button */
  .navbar-content { position: relative; }
  .navbar.menu-open .navbar-content { justify-content: center; }
  .navbar.menu-open .navbar-logo { margin-left: auto; margin-right: auto; }
  .navbar.menu-open .mobile-menu-btn {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
  }
}

@media (max-width: 480px){
  .navbar-container { padding: 0 12px; }
  .mobile-menu { padding: 16px; }
  .mobile-menu-link { font-size: 1.125rem; padding: 16px 0; }
}

/* Accessibility focus */
.keyboard-navigation .navbar-link:focus,
.keyboard-navigation .mobile-menu-link:focus,
.keyboard-navigation .mobile-menu-btn:focus,
.keyboard-navigation .mobile-close-btn:focus{
  outline: 2px solid var(--navbar-text-hover);
  outline-offset: 2px;
  border-radius: 6px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  * { transition: none !important; animation: none !important; }
}

.navbar-link {
  position: relative;
}