/* ── Hamburger button (hidden by default) ───────────────────────────── */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  flex-shrink: 0;
}
.hamburger-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text, #102830);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}
.hamburger-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.open span:nth-child(2) { opacity: 0; }
.hamburger-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Dropdown ────────────────────────────────────────────────────────── */
.mobile-nav-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(16,40,48,.10);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(16,40,48,.16);
  padding: 8px;
  min-width: 200px;
  z-index: 200;
}
body.dark .mobile-nav-menu { background: rgba(8,18,38,.96); }
.mobile-nav-menu.open { display: block; }

/* ── Items ───────────────────────────────────────────────────────────── */
.mobile-nav-item {
  display: block;
  width: 100%;
  padding: 11px 14px;
  border-radius: 12px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font: 600 14px 'Inter', sans-serif;
  color: var(--text, #102830);
  text-decoration: none;
  transition: background .15s;
  white-space: nowrap;
}
.mobile-nav-item:hover { background: rgba(24,82,224,.08); }
body.dark .mobile-nav-item { color: var(--text, #e8f0fe); }
body.dark .mobile-nav-item:hover { background: rgba(91,142,240,.10); }

.mobile-nav-sep {
  height: 1px;
  background: rgba(16,40,48,.10);
  margin: 4px 8px;
}
body.dark .mobile-nav-sep { background: rgba(255,255,255,.08); }

/* ── Mobile breakpoint ───────────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-pill { position: relative !important; }
  .nav-link,
  .theme-btn,
  .theme-toggle-top,
  .nav-sep { display: none !important; }
  .hamburger-btn { display: flex !important; }
}