/* ══════════════════════════════
   NAV
══════════════════════════════ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  transition: background 0.3s, border-color 0.3s;
}
#nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 1px 0 rgba(255,255,255,0.5);
}
.nav-bar { display: flex; align-items: center; justify-content: space-between; height: 3.75rem; }

.nav-logo {
  height: 1.75rem;
  width: auto;
  opacity: 1;
  transition: filter 0.3s ease, opacity 0.3s ease;
}
[data-theme="dark"] .nav-logo {
  filter: brightness(0) invert(1);
}
[data-theme="light"] .nav-logo {
  filter: brightness(0);
}

.nav-links { display: flex; align-items: center; gap: 1.75rem; }
.nav-actions { display: flex; align-items: center; gap: 0.75rem; }

.navlink {
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 600;
  font-family: var(--font-heading) !important;
  text-transform: uppercase;
  letter-spacing: var(--tracking-normal);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
  padding-bottom: 2px;
}
.navlink::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 1px; background: var(--accent); transition: width 0.2s; }
.navlink:hover, .navlink.active { color: var(--text); }
.navlink:hover::after, .navlink.active::after { width: 100%; }

.nav-resume {
  padding: 0.4375rem 1.125rem;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.8125rem;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
  font-family: var(--font-heading) !important;
  letter-spacing: 0.03em;
}
.nav-resume:hover { opacity: 0.85; transform: translateY(-1px); }

/* ── Theme Toggle ── */
.theme-toggle-pill {
  display: inline-flex;
  align-items: center;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  flex-shrink: 0;
}
.toggle-track {
  position: relative;
  width: 2.75rem; height: 1.5rem;
  border-radius: 999px;
  background: var(--layer-02);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.22), inset 0 1px 0 rgba(255,255,255,0.06);
  transition: background 0.3s ease, border-color 0.3s ease;
}
[data-theme="light"] .toggle-track {
  background: #d8dff0;
  border-color: rgba(0,0,0,0.1);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.12), inset 0 1px 0 rgba(255,255,255,0.9);
}
.toggle-thumb {
  position: absolute;
  top: 50%; left: 0.18rem;
  transform: translateY(-50%) translateX(0);
  width: 1.15rem; height: 1.15rem;
  border-radius: 50%;
  background: linear-gradient(145deg, #ffffff, #dce3f0);
  box-shadow: 0 1px 4px rgba(0,0,0,0.35), 0 0 0 0.5px rgba(0,0,0,0.1);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
  display: flex; align-items: center; justify-content: center;
  z-index: 2;
}
/* dark = aria-pressed true → thumb slides right */
.theme-toggle-pill[aria-pressed="true"] .toggle-thumb {
  transform: translateY(-50%) translateX(1.22rem);
}
.toggle-icon {
  position: absolute;
  width: 0.62rem; height: 0.62rem;
  color: var(--accent-light);
  stroke-width: 2.5;
  transition: opacity 0.2s ease;
  pointer-events: none;
}
/* sun inside thumb when light (aria-pressed=false), moon when dark */
.toggle-icon-sun  { opacity: 1; }
.toggle-icon-moon { opacity: 0; }
.theme-toggle-pill[aria-pressed="true"]  .toggle-icon-sun  { opacity: 0; }
.theme-toggle-pill[aria-pressed="true"]  .toggle-icon-moon { opacity: 1; }

.theme-toggle-pill:hover .toggle-track { border-color: var(--accent-border); }
#mnav .theme-toggle-pill { margin-bottom: 0.25rem; }

/* ── Nav separator ── */
.nav-separator {
  width: 1px; height: 1.25rem;
  background: var(--border);
  flex-shrink: 0;
}

/* ── Hamburger ── */
.hamburger { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.hamburger span { display: block; width: 20px; height: 1.5px; background: var(--text); }

/* ── Mobile nav ── */
#mnav {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--nav-bg);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  padding: 1.25rem 1.5rem;
  flex-direction: column;
  gap: 0.875rem;
}
#mnav.open { display: flex; }
.mnav-resume {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  width: fit-content;
  font-family: var(--font-heading) !important;
  letter-spacing: 0.03em;
  transition: opacity 0.2s;
}
.mnav-resume:hover { opacity: 0.85; }

@media (max-width: 900px) {
  #desktop-nav { display: none !important; }
  .hamburger { display: flex !important; }
  #resume-nav { display: none !important; }
}