/* ============================================================
   KAILASH WEBDESIGN — Header & Navigation
   ============================================================ */

/* === HEADER === */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(4,5,14,0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), height var(--transition);
}

#header.scrolled {
  background: rgba(4,5,14,0.95);
  border-bottom-color: var(--border);
  height: 62px;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* === LOGO === */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--grad-violet);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 0 20px rgba(124,107,255,0.4);
  transition: box-shadow var(--transition);
}

.logo:hover .logo-mark {
  box-shadow: 0 0 32px rgba(124,107,255,0.65);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  line-height: 1.1;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.logo-text span {
  background: var(--grad-violet);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === DESKTOP NAV === */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-link {
  padding: 0.45rem 1rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  transition: color var(--transition), background var(--transition);
  position: relative;
  letter-spacing: 0.01em;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  right: 50%;
  height: 2px;
  background: var(--grad-violet);
  border-radius: 2px;
  transition: left var(--transition), right var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--bg-surface-2);
}

.nav-link.active::after {
  left: 1rem;
  right: 1rem;
}

/* === NAV CTA === */
.nav-cta {
  background: var(--grad-violet);
  color: #fff !important;
  padding: 0.5rem 1.4rem !important;
  border-radius: var(--radius-full) !important;
  font-weight: 600 !important;
  font-size: var(--text-sm) !important;
  box-shadow: 0 0 20px rgba(124,107,255,0.3);
  margin-left: var(--space-3);
  transition: box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 36px rgba(124,107,255,0.55);
}

/* === HAMBURGER === */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(4.5px, 4.5px); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(4.5px, -4.5px); }

/* === MOBILE NAV === */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(4,5,14,0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  padding: var(--space-8) var(--space-6);
  gap: var(--space-2);
  overflow-y: auto;
}

.nav-mobile.open { display: flex; }

.nav-mobile .nav-link {
  font-size: var(--text-xl);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
}

/* .nav-mobile .nav-link::after { display: none; } */

.nav-mobile .nav-cta {
  margin-left: 0 !important;
  margin-top: var(--space-4);
  text-align: center;
  justify-content: center;
  font-size: var(--text-base) !important;
  padding: 0.9rem 2rem !important;
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .nav-desktop { display: none; }
  .hamburger { display: flex; }
}