.nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: var(--container-width);
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-nav);
  box-shadow: var(--shadow);
  z-index: 100;
  transition: box-shadow 0.2s ease;
}
.nav.scrolled {
  box-shadow: var(--shadow-hover);
}
.nav-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
}
.nav-logo {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
  text-decoration: none;
  transition: transform 0.2s ease;
}
.nav-logo:hover {
  transform: translateY(-1px);
}
.nav-logo-img {
  display: block;
  height: 44px;
  width: auto;
}
.nav-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
  margin-left: auto;
  margin-right: auto;
}
.nav-search {
  flex: 1;
  min-width: 0;
  max-width: 320px;
  margin-left: 0;
  margin-right: 0;
  padding: 9px 16px;
  font-size: 0.9rem;
  color: var(--text);
  background-color: var(--page-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-nav);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
.nav-search::placeholder {
  color: var(--text-muted);
}
.nav-search:focus {
  background-color: var(--card-bg);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  color: var(--text-muted);
  background-color: var(--page-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.3s ease, transform 0.2s ease;
}
.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.theme-toggle:active {
  transform: scale(0.94);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.theme-icon {
  transition: transform 0.3s ease;
}
.theme-toggle:hover .theme-icon-sun {
  transform: rotate(24deg) scale(1.08);
}
.theme-toggle:hover .theme-icon-moon {
  transform: rotate(-14deg) scale(1.08);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}
.nav-link {
  position: relative;
  padding: 8px 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 10px;
  white-space: nowrap;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}
.nav-link:hover {
  color: var(--accent);
  background-color: rgba(79, 70, 229, 0.08);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: var(--accent);
  font-weight: 600;
  background-color: rgba(79, 70, 229, 0.1);
}
.nav-link.active::after {
  transform: scaleX(1);
}
.nav-logout:hover {
  color: var(--danger);
  background-color: rgba(220, 38, 38, 0.08);
}
.nav-logout:hover::after,
.nav-logout.active::after {
  background-color: var(--danger);
}
.nav-toggle {
  display: none;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s ease;
}
.nav-toggle:hover {
  border-color: var(--accent);
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle.open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}
@media (max-width: 768px) {
  .nav {
    top: 0;
    left: 0;
    transform: none;
    width: 100%;
    max-width: none;
    border-radius: 0 0 16px 16px;
  }
  .nav-inner {
    gap: 10px;
    padding: 12px 14px;
  }
  .nav-actions {
    flex: 1;
    gap: 8px;
    margin-left: 0;
    margin-right: 0;
  }
  .nav-search {
    max-width: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    position: absolute;
    top: calc(100% + 8px);
    right: 12px;
    min-width: 180px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow-hover);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px) scale(0.98);
    transform-origin: top right;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }
  .nav-links.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
  }
  .nav-link {
    display: block;
    padding: 10px 12px;
  }
  .nav-link::after {
    display: none;
  }
}
@media (max-width: 420px) {
  .nav-inner {
    gap: 8px;
    padding: 10px 12px;
  }
  .nav-logo {
    margin-left: 4px;
  }
  .nav-logo-img {
    height: 36px;
  }
  .nav-search {
    padding: 8px 12px;
    font-size: 0.8rem;
  }
  .theme-toggle {
    width: 34px;
    height: 34px;
  }
  .nav-toggle {
    width: 34px;
    height: 34px;
  }
}