/* ─── NAV ─────────────────────────────────────────────────────── */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0 24px;
  transition: all .3s ease;
}
#nav.scrolled {
  background: var(--nav-scrolled-bg);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 70px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.1rem; letter-spacing: -.01em; }
.nav-logo img { height: 36px; width: auto; }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  font-size: .875rem; font-weight: 500; color: var(--text-3);
  padding: 6px 12px; border-radius: 6px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: rgba(37,99,235,.1); }
.nav-links a.active { color: var(--primary); background: rgba(37,99,235,.15); font-weight: 600; border-bottom: 2px solid var(--primary); border-radius: 6px 6px 0 0; }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-cta { margin-left: 4px; }

.nav-burger {
  display: none; background: transparent;
  width: 40px; height: 40px; flex-direction: column;
  justify-content: center; align-items: center; gap: 5px;
}
.nav-burger span { display: block; width: 22px; height: 2px; background: var(--text-2); border-radius: 2px; transition: all .3s; }
.nav-mobile {
  display: none; position: fixed; inset: 70px 0 0;
  background: var(--nav-mobile-bg); backdrop-filter: blur(20px);
  flex-direction: column; padding: 24px;
  z-index: 999;
}
.nav-mobile.open { display: flex; }
.nav-mobile a { font-size: 1.1rem; font-weight: 500; color: var(--text-2); padding: 14px 0; border-bottom: 1px solid var(--border); }

/* ─── Theme Toggle ────────────────────────────────────────────── */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 8px; flex-shrink: 0;
  background: var(--lang-btn-bg); border: 1px solid var(--border-2);
  color: var(--text-3);
  transition: all .2s;
}
.theme-toggle:hover { color: var(--primary); border-color: rgba(37,99,235,.4); background: rgba(37,99,235,.1); }
.theme-toggle svg { width: 16px; height: 16px; }
/* Light mode: show moon (click to switch to dark) */
.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }
/* Dark mode: show sun (click to switch to light) */
[data-theme="dark"] .theme-toggle .icon-sun  { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ─── Language Switcher ───────────────────────────────────────── */
.lang-switcher { position: relative; }
.lang-switcher > summary { list-style: none; }
.lang-switcher > summary::-webkit-details-marker { display: none; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 8px; cursor: pointer;
  font-size: .8125rem; font-weight: 600; color: var(--text-3);
  background: var(--lang-btn-bg); border: 1px solid var(--border-2);
  transition: all .2s; user-select: none; white-space: nowrap;
}
.lang-btn:hover { color: var(--text); background: rgba(37,99,235,.08); border-color: rgba(37,99,235,.3); }
.lang-chevron { width: 10px; height: 6px; transition: transform .2s; opacity: .6; }
details[open] .lang-chevron { transform: rotate(180deg); }
.lang-dropdown {
  position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--lang-dropdown-bg); border: 1px solid var(--border-2);
  border-radius: 10px; padding: 4px; min-width: 148px;
  box-shadow: var(--shadow-lg);
  z-index: 200; display: flex; flex-direction: column; gap: 2px;
}
.lang-opt {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; border-radius: 7px;
  font-size: .825rem; font-weight: 500; color: var(--text-3); white-space: nowrap;
  transition: background .15s, color .15s;
}
.lang-opt:hover { background: rgba(37,99,235,.07); color: var(--text); }
.lang-opt--active { color: var(--primary); font-weight: 700; pointer-events: none; }
.nav-mob-langs {
  display: flex; gap: 8px; align-items: center;
  padding: 12px 0; border-bottom: 1px solid var(--border); margin-bottom: 4px;
}
.nav-mob-langs a, .lang-active {
  padding: 6px 12px; border-radius: 8px;
  font-size: .875rem; font-weight: 600; color: var(--text-3);
  border: 1px solid var(--border); background: transparent;
}
.lang-active { color: var(--primary); border-color: rgba(37,99,235,.3); }
.nav-mob-langs a:hover { color: var(--text); background: rgba(37,99,235,.07); }
/* ── Tooltip ─────────────────────────────────────────────────── */
#pa-tooltip {
  position: fixed;
  z-index: 10000;
  background: #1e293b;
  color: #f1f5f9;
  font-size: .72rem;
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: .01em;
  padding: 5px 10px;
  border-radius: 6px;
  pointer-events: none;
  max-width: 230px;
  text-align: center;
  white-space: normal;
  opacity: 0;
  transition: opacity .13s ease;
  box-shadow: 0 2px 10px rgba(0,0,0,.28);
}
#pa-tooltip.pa-tt-visible { opacity: 1; }
#pa-tooltip::after {
  content: '';
  position: absolute;
  width: 0; height: 0;
  border: 5px solid transparent;
}
#pa-tooltip.pa-tt-above::after {
  bottom: -10px; left: 50%;
  transform: translateX(-50%);
  border-top-color: #1e293b;
}
#pa-tooltip.pa-tt-below::after {
  top: -10px; left: 50%;
  transform: translateX(-50%);
  border-bottom-color: #1e293b;
}
[data-theme="dark"] #pa-tooltip { background: #e2e8f0; color: #0f172a; }
[data-theme="dark"] #pa-tooltip.pa-tt-above::after { border-top-color: #e2e8f0; }
[data-theme="dark"] #pa-tooltip.pa-tt-below::after { border-bottom-color: #e2e8f0; }
@media (hover: none) { #pa-tooltip { display: none; } }