@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.skeleton-box {
  animation: shimmer 1.5s linear infinite;
  background-color: var(--bg-canvas);
  background-image: linear-gradient(
    to right,
    var(--bg-canvas) 0%,
    var(--border-color) 20%,
    var(--bg-canvas) 40%,
    var(--bg-canvas) 100%
  );
  background-repeat: no-repeat;
  background-size: 2000px 100%;
  border-radius: 6px;
  display: inline-block;
}

.skeleton-text {
  height: 16px;
}

.topbar {
  background: rgba(var(--bg-canvas-rgb, 255, 255, 255), 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1030;
  transition: all 0.3s ease;
}

.dark-theme .topbar {
  background: rgba(13, 17, 23, 0.8);
}

.topbar.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border-bottom-color: transparent;
}

.dark-theme .topbar.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.topbar-logo {
  height: 38px;
}

.topbar-nav {
  gap: 0.5rem;
  align-items: center;
}

.topbar-button {
  position: relative;
  padding: 0.75rem 1rem;
  background-color: transparent;
  color: var(--text-body);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.topbar-button:hover {
  color: var(--text-heading);
}

.topbar-button::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.topbar-button.active::after,
.topbar-button:hover::after {
  width: 60%;
}

.topbar-nav .dropdown-toggle::after {
  content: none;
}

.login-button {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-surface);
  color: var(--text-heading);
  font-weight: 500;
  transition: all 0.3s ease;
}

.login-button.logged-in {
  background-color: var(--bg-surface);
  border-color: var(--border-color);
}

.dropdown-toggle::after {
  display: none;
}

.login-button.logged-in:hover {
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(var(--primary-rgb), 0.2);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: cover;
  margin-right: 10px;
}

#login-chevron {
  transition: transform 0.2s ease-in-out;
  color: var(--text-muted);
}

.dropdown.active #login-chevron {
  transform: rotate(180deg);
  color: var(--primary);
}

.theme-switch {
  display: flex;
  align-items: center;
  justify-content: space-around;
  width: 60px;
  height: 30px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 4px;
  cursor: pointer;
  position: relative;
  transition: background-color 0.3s ease;
  margin-right: 15px;
}
.theme-switch:hover {
  border-color: var(--primary);
}

.theme-switch i {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color 0.3s ease;
}

.theme-switch-toggle {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background-color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.theme-switch-toggle i {
  position: absolute;
  color: #fff;
  font-size: 0.7rem;
  transition: opacity 0.2s ease, transform 0.3s ease;
}

.theme-switch-toggle .theme-icon-sun {
  opacity: 0;
  transform: rotate(-90deg);
}
.theme-switch-toggle .theme-icon-moon {
  opacity: 1;
  transform: rotate(0deg);
}

.dark-theme .theme-switch-toggle {
  transform: translateX(28px);
}
.dark-theme .theme-switch-toggle .theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg);
}
.dark-theme .theme-switch-toggle .theme-icon-moon {
  opacity: 0;
  transform: rotate(90deg);
}
.dark-theme .theme-switch .fa-moon {
  color: var(--text-muted);
}

.dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.75rem);
  right: 0;
  background: var(--bg-canvas);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.5rem;
  min-width: 200px;
  z-index: 1001;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.dropdown.active .dropdown-menu {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.dropdown-item {
  color: var(--text-body);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.dropdown-item:hover {
  color: var(--primary);
  background-color: var(--primary-light-theme);
}

.dark-theme .dropdown-item:hover {
  color: var(--text-heading);
  background-color: rgba(var(--primary-rgb), 0.1);
}

.dropdown-toggle .fa-chevron-down {
  transition: transform 0.2s ease-in-out;
}

.dropdown.active .dropdown-toggle .fa-chevron-down {
  transform: rotate(180deg);
}

.topbar-nav .dropdown-toggle.topbar-button,
.topbar-nav .dropdown-toggle.topbar-button:focus,
.topbar-nav .dropdown-toggle.topbar-button:active,
.dropdown.active > .dropdown-toggle.topbar-button {
  background-color: transparent !important;
  border-color: transparent !important;
  box-shadow: none !important;
  outline: none !important;
}

.mega-menu {
  display: none;
  width: 450px;
  padding: 1.5rem;
  gap: 1.5rem;
  background-image: radial-gradient(
    circle at 0% 0%,
    rgba(var(--primary-rgb), 0.05) 0%,
    transparent 40%
  );
}

.dark-theme .mega-menu {
  background-image: radial-gradient(
    circle at 0% 0%,
    rgba(var(--primary-rgb), 0.15) 0%,
    transparent 50%
  );
}

.dropdown.active .mega-menu {
  display: flex;
}

.mega-menu-column {
  flex: 1;
}

.mega-menu-header {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.mega-menu .dropdown-item {
  padding: 0.5rem 0.75rem;
}

.mega-menu .dropdown-item:hover {
  background-color: rgba(var(--primary-rgb), 0.08);
}

.dark-theme .mega-menu .dropdown-item:hover {
  background-color: rgba(var(--primary-rgb), 0.2);
}

.hamburger-menu,
.close-menu {
  background: none;
  border: none;
  color: var(--text-heading);
  font-size: 1.5rem;
  margin-left: 1rem;
}

body.mobile-menu-open {
  overflow: hidden;
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s ease, visibility 0.4s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgba(18, 18, 20, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
body:not(.dark-theme) .mobile-menu {
  background-color: rgba(250, 250, 252, 0.95);
}
.mobile-menu.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.close-menu {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--text-heading);
  font-size: 2rem;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 2001;
  padding: 0.5rem;
  opacity: 0.8;
}
.close-menu:hover {
  color: var(--primary);
  transform: rotate(90deg);
  opacity: 1;
}

.mobile-menu-content {
  width: 100%;
  max-width: 600px;
  padding: 2rem;
  position: relative;
}
.mobile-nav-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: slideIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.mobile-nav-container.is-exiting {
  animation: slideOut 0.4s cubic-bezier(0.7, 0, 0.84, 0) forwards;
}

.mobile-menu-link {
  color: var(--text-heading);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 600;
  font-family: var(--font-heading);
  text-decoration: none;
  border: none;
  background: none;
  padding: 0.5rem;
  margin: 0.25rem 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s ease, color 0.3s ease;
}

.mobile-nav-container:hover .mobile-menu-link:not(:hover) {
  opacity: 0.4;
}
.mobile-menu-link.is-category {
  color: var(--text-body);
}
.mobile-nav-container:hover .mobile-menu-link.is-category:not(:hover) {
  opacity: 0.2;
}
.mobile-menu-link:hover {
  color: var(--primary);
}

.mobile-menu-back {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 2rem;
  transition: color 0.2s ease;
}
.mobile-menu-back:hover {
  color: var(--primary);
}

.mobile-menu-sub-header {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 1.5rem 0 0.5rem;
  width: 100%;
  text-align: center;
}

@keyframes slideIn {
  from {
    transform: translateX(50px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(-50px);
    opacity: 0;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}