/* ================================================================
   nav.css — Navigation Bar
   Hussain Patanwala Portfolio
================================================================ */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  padding: 20px 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, padding 0.3s, background 0.4s;
}

nav.scrolled {
  border-color: var(--border);
  padding: 14px 5%;
}

/* ── Logo ─────────────────────────────────────────────────────── */
.logo {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

/* ── Nav Links ────────────────────────────────────────────────── */
.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-decoration: none;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: color 0.25s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform 0.25s;
}

.nav-links a:hover {
  color: var(--cyan);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

/* ── Nav Right Controls ───────────────────────────────────────── */
.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Theme Toggle */
.theme-toggle {
  width: 44px;
  height: 24px;
  border-radius: 99px;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  position: relative;
  transition: background 0.3s;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--cyan);
  transition: transform 0.3s, background 0.3s;
}

[data-theme="light"] .theme-toggle::after {
  transform: translateX(20px);
  background: var(--purple);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--cyan);
  transition: all 0.3s;
}