/* ══════════════════════════════════════════
   PolitiLab — Navigation
   ══════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 200;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 0;
  transition: background var(--t);
}

/* ── Logo ── */
.nav-logo {
  display: flex; align-items: center; gap: 9px;
  text-decoration: none; flex-shrink: 0;
  margin-right: 32px;
}
.nav-logo-mark {
  width: 32px; height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: grid; place-items: center;
  font-size: 1rem; flex-shrink: 0;
  box-shadow: 0 0 14px color-mix(in srgb, var(--accent) 40%, transparent);
  transition: background var(--t), box-shadow var(--t);
}
.nav-logo-text {
  font-family: var(--f-display);
  font-size: 1.05rem; font-weight: 600;
  color: var(--text);
  letter-spacing: -.01em;
}
.nav-logo-text span { color: var(--accent); font-style: italic; }

/* ── Links ── */
.nav-links {
  display: flex; align-items: center;
  gap: 2px; list-style: none; flex: 1;
}
.nav-links li a {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 13px;
  border-radius: var(--r-sm);
  font-size: .82rem; font-weight: 500;
  color: var(--text2);
  text-decoration: none;
  letter-spacing: .01em;
  transition: color var(--t), background var(--t);
  white-space: nowrap;
}
.nav-links li a .nav-icon { font-size: .95rem; opacity: .8; }
.nav-links li a:hover { color: var(--text); background: var(--surface2); }
.nav-links li a.active {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

/* ── Right side ── */
.nav-right {
  margin-left: auto;
  display: flex; align-items: center; gap: 10px;
}

/* Theme toggle */
.theme-toggle {
  width: 34px; height: 34px;
  border-radius: 8px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  display: grid; place-items: center;
  cursor: pointer; font-size: 1rem;
  transition: background var(--t), border-color var(--t), transform var(--t);
  flex-shrink: 0;
}
.theme-toggle:hover { background: var(--surface3); transform: scale(1.05); }

.nav-badge {
  padding: 3px 10px;
  border-radius: 100px;
  font-size: .65rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  border: 1px solid var(--border2);
  color: var(--muted);
  background: var(--surface2);
  font-family: var(--f-mono);
}

/* ── Burger (mobile) ── */
.nav-burger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 8px; margin-left: auto;
  background: none; border: none;
}
.nav-burger span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s;
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile drawer ── */
.nav-drawer {
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: color-mix(in srgb, var(--bg) 95%, transparent);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px 24px;
  z-index: 199;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform .3s var(--ease), opacity .3s;
}
.nav-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.nav-drawer ul { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.nav-drawer ul li a {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border-radius: var(--r);
  font-size: .92rem; font-weight: 500;
  color: var(--text2); text-decoration: none;
  transition: color var(--t), background var(--t);
}
.nav-drawer ul li a:hover,
.nav-drawer ul li a.active { color: var(--text); background: var(--surface2); }
.nav-drawer ul li a.active { color: var(--accent); }

.nav-drawer-footer {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-drawer-footer .theme-toggle { margin: 0; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav { padding: 0 18px; }
  .nav-links, .nav-right .nav-badge { display: none; }
  .nav-burger { display: flex; }
  .nav-right { gap: 8px; }
}
@media (max-width: 380px) {
  .nav-logo-text { display: none; }
}