/* ================================================
   NAVBAR - Clean Professional Navigation
   ================================================ */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-base);
  transition: all var(--transition);
}

html[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.8);
}

.navbar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* === LOGO === */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--text-base);
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  transition: opacity var(--transition);
}

.logo:hover {
  opacity: 0.8;
  color: var(--text-base);
}

.logo svg {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

/* === NAV LINKS === */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links > li {
  position: relative;
}

.nav-links a {
  display: inline-block;
  padding: 0.5rem 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--text-base);
  background: var(--surface-hover);
}

.nav-links a.active {
  color: var(--primary);
  background: var(--primary-pale);
}

html[data-theme="dark"] .nav-links a.active {
  background: rgba(16, 185, 129, 0.15);
}

/* === DROPDOWNS === */
.nav-dd {
  position: relative;
}

.nav-dd details {
  position: relative;
}

.nav-dd summary {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  cursor: pointer;
  list-style: none;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
}

.nav-dd summary::-webkit-details-marker,
.nav-dd summary::marker {
  display: none;
}

.nav-dd summary:hover {
  color: var(--text-base);
  background: var(--surface-hover);
}

.nav-dd summary::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform var(--transition);
}

.nav-dd details[open] summary::after {
  transform: rotate(180deg);
}

.dd-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 220px;
  padding: 0.5rem;
  background: var(--surface-card);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-dd details[open] .dd-menu {
  display: flex;
}

.dd-menu a {
  padding: 0.625rem 0.75rem !important;
  color: var(--text-base) !important;
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.dd-menu a:hover {
  background: var(--surface-hover) !important;
  color: var(--primary) !important;
}

/* === NAV ACTIONS === */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-base);
  border-radius: var(--radius-full);
  background: var(--surface-card);
  cursor: pointer;
  transition: all var(--transition);
}

.theme-toggle:hover {
  background: var(--surface-hover);
  transform: translateY(-1px);
}

.theme-icon {
  font-size: 1.125rem;
  line-height: 1;
}

/* === MOBILE MENU === */
.mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-base);
  border-radius: var(--radius-full);
  background: var(--surface-card);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--transition);
}

.mobile-toggle:hover {
  background: var(--surface-hover);
}

@media (max-width: 960px) {
  .mobile-toggle {
    display: inline-flex;
  }
  
  .nav-links {
    position: absolute;
    top: calc(100% + 1rem);
    left: 1.5rem;
    right: 1.5rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--surface-card);
    border: 1px solid var(--border-base);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: none;
  }
  
  .nav-links.open {
    display: flex;
  }
  
  .nav-links > li {
    width: 100%;
  }
  
  .nav-links a {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
  }
  
  .nav-dd summary {
    width: 100%;
    padding: 0.75rem 1rem;
  }
  
  .dd-menu {
    position: static;
    margin-top: 0.5rem;
    margin-left: 1rem;
    box-shadow: none;
    border: none;
    background: transparent;
  }
  
  .dd-menu a {
    padding-left: 1rem !important;
  }
}

@media (max-width: 600px) {
  .navbar-inner {
    padding: 0.625rem 1rem;
  }
  
  .logo {
    font-size: 1rem;
  }
  
  .logo svg {
    width: 26px;
    height: 26px;
  }
}