/* --- Mobile menu layering fix --- */
:root {
  --nav-z: 1000;
  --backdrop-z: 999;
  --menu-width: 86vw;
  --menu-max: 420px;
  --menu-bg: #0c1a25;      /* uses your existing dark surface */
  --menu-border: rgba(255,255,255,.08);
}

.navbar {
  position: sticky;
  top: 0;
  z-index: var(--nav-z);  /* stays above page */
}

/* Backdrop */
.mobile-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  z-index: var(--backdrop-z);
  opacity: 0;
  transition: opacity .18s ease;
}
.mobile-backdrop[aria-hidden="false"] { opacity: 1; }

/* Sliding panel */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--menu-width);
  max-width: var(--menu-max);
  height: 100vh;
  background: linear-gradient(180deg,#0c1a25,#0b1822);
  border-left: 1px solid var(--menu-border);
  box-shadow: 0 18px 46px rgba(0,0,0,.55);
  transform: translateX(100%);
  transition: transform .22s ease-out;
  z-index: calc(var(--backdrop-z) + 1);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.mobile-menu.open { transform: translateX(0); }

.mobile-menu__list {
  list-style: none;
  margin: 88px 0 24px;
  padding: 0 18px 28px;
  display: grid;
  gap: 10px;
}
.mobile-menu__list a {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--menu-border);
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
}

/* Toggle button (keeps your existing look) */
.nav-toggle { z-index: calc(var(--backdrop-z) + 2); position: relative; }

/* Lock scrolling when menu is open */
body.menu-open { overflow: hidden; touch-action: none; }