/* ================================================
   NAVIGATION
================================================ */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  padding: 18px 0;
  transition: padding 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
nav.scrolled {
  padding: 12px 0;
  background: var(--nav-scrolled-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.02em;
}
.nav-logo .accent { color: var(--indigo-light); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
  position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.nav-resume {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--indigo-light);
  border: 1px solid rgba(99, 102, 241, 0.4);
  padding: 7px 18px;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.nav-links a.nav-resume:hover {
  background: var(--indigo);
  color: #fff;
  border-color: var(--indigo);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;

  background: none;
  border: none;
  padding: 4px;
  cursor: none;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(20px);
  z-index: 490;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 40px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-muted);

  transition: color 0.2s;
}
.mobile-menu a:hover { color: var(--indigo-light); }

/* ================================================
   THEME TOGGLE — sliding pill
================================================ */
.theme-toggle {
  background: none;
  border: none;
  padding: 0;
  flex-shrink: 0;
  cursor: none;
}
.toggle-track {
  display: block;
  width: 52px;
  height: 28px;
  border-radius: 14px;
  background: rgba(99, 102, 241, 0.12);
  border: 1.5px solid rgba(99, 102, 241, 0.28);
  position: relative;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.theme-toggle:hover .toggle-track {
  background: rgba(99, 102, 241, 0.2);
  border-color: rgba(99, 102, 241, 0.55);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}
.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.35);
  transition: left 0.38s cubic-bezier(0.34, 1.56, 0.64, 1),
              background 0.3s;
}
.toggle-icon {
  width: 11px;
  height: 11px;
  position: absolute;
  color: #fff;
  transition: opacity 0.2s, transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}
/* Dark: moon visible, sun hidden */
.moon-icon { opacity: 1; transform: scale(1) rotate(0deg);   }
.sun-icon  { opacity: 0; transform: scale(0.4) rotate(90deg); }

/* Light: thumb slides right, sun appears */
[data-theme="light"] .toggle-thumb {
  left: 27px;
  background: #f59e0b;
}
[data-theme="light"] .toggle-track {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.35);
}
[data-theme="light"] .theme-toggle:hover .toggle-track {
  background: rgba(245, 158, 11, 0.18);
  border-color: rgba(245, 158, 11, 0.6);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}
[data-theme="light"] .moon-icon { opacity: 0; transform: scale(0.4) rotate(-90deg); }
[data-theme="light"] .sun-icon  { opacity: 1; transform: scale(1)   rotate(0deg);   }


/* Light mode — nav shadow */
[data-theme="light"] nav.scrolled {
  box-shadow: 0 1px 20px rgba(0,0,0,0.08);
  border-color: rgba(0,0,0,0.07);
}

/* Light mode — mobile menu */
[data-theme="light"] .mobile-menu a { color: var(--text-muted); }