/* ============================================================
   NAVIGATION.CSS — Header, Nav Menu, Hamburger, Mobile Nav
   ============================================================ */

/* ---------- Main Navigation ---------- */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-base);
}

.main-nav.scrolled {
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ---------- Logo ---------- */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  z-index: 1001;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  position: relative;
}

.nav-logo-icon::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  z-index: -1;
  opacity: 0.3;
  filter: blur(8px);
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.nav-logo-text span {
  color: var(--primary);
}

/* ---------- Nav Links ---------- */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-link {
  position: relative;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link i {
  font-size: 0.85rem;
  opacity: 0.7;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(var(--primary-rgb), 0.05);
}

.nav-link:hover::after {
  width: 60%;
}

.nav-link.active {
  color: var(--primary);
}

.nav-link.active::after {
  width: 60%;
}

/* ---------- Nav Actions ---------- */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.1);
}

.nav-cta {
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
  color: #fff;
}

/* ---------- Hamburger Menu ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  z-index: 1001;
  background: transparent;
  border: none;
  padding: 4px;
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger.active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Mobile Nav ---------- */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  z-index: 999;
  transition: right var(--transition-slow);
  overflow-y: auto;
  padding: calc(var(--nav-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
}

.mobile-nav.open {
  right: 0;
}

.mobile-nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-nav-overlay.visible {
  opacity: 1;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  font-size: 1rem;
  font-weight: 500;
}

.mobile-nav-link i {
  width: 24px;
  text-align: center;
  font-size: 1.1rem;
  color: var(--primary);
  opacity: 0.7;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background: rgba(var(--primary-rgb), 0.1);
  color: var(--primary);
}

.mobile-nav-link.active i {
  opacity: 1;
}

.mobile-nav-divider {
  height: 1px;
  background: var(--border-color);
  margin: var(--space-md) 0;
}

.mobile-nav-footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
}

.mobile-nav-socials {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-lg);
}

.mobile-social-link {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.mobile-social-link:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.1);
}

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--nav-height);
}

.breadcrumbs a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.breadcrumbs a:hover {
  color: var(--primary);
}

.breadcrumbs .separator {
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumbs .current {
  color: var(--primary);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }

  .nav-actions .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: 0 var(--space-md);
  }

  .nav-logo-text {
    font-size: 0.95rem;
  }

  .mobile-nav {
    width: 100%;
    max-width: 100%;
  }
}