:root {
  --nav-width-expanded: 190px;
  --nav-size-collapsed: 48px;
  --nav-border-radius: 16px;
  --nav-transition-speed: 0.25s;
  --nav-transition-easing: cubic-bezier(0.2, 0.8, 0.2, 1);
  --nav-expanded-height: 48px;
}
body {
  background-color: var(--bg);
  margin: 0;
  font-family: sans-serif;
  overflow: hidden;
}
#content-frame {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  z-index: -1;
}
#menu-dismiss-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  background: transparent;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}
#menu-dismiss-overlay.active {
  pointer-events: auto;
}
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
@keyframes pulse {
  0% {
    transform: scale(1.02);
  }
  50% {
    transform: scale(0.98);
  }
  100% {
    transform: scale(1.02);
  }
}

.ui-card-base {
  background-color: var(--fourth-bg);
  border-radius: 16px;
  border: 1.5px solid rgba(255, 255, 255, 0.08);
}
#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1000;
  background-color: rgba(10, 17, 29, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: opacity 0.4s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
}
#loading-overlay.fade-out {
  opacity: 0;
  pointer-events: none;
}
#loading-logo {
  width: 60px;
  height: 60px;
  opacity: 0;
  position: relative;
  animation: pulse 4s ease-in-out infinite;
  transition: opacity 0.3s ease-in-out;
}
#loading-logo.loaded {
  opacity: 1;
}

.nav-container {
  position: fixed;
  bottom: 0;
  left: 0;
  z-index: 15;
  padding: 10px;
  display: flex;
  align-items: flex-end;
}
.nav-box {
  border-radius: var(--nav-border-radius);
  cursor: pointer;
  overflow: hidden;
  position: relative;
  width: var(--nav-size-collapsed);
  height: var(--nav-size-collapsed);
  background-color: var(--fourth-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  transition: all var(--nav-transition-speed) var(--nav-transition-easing),
    transform 0s linear;
}
.nav-box-content {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  width: 100%;
  box-sizing: border-box;
}
.current-page-icon {
  color: white;
  font-size: 26px;
  position: absolute;
  left: 22px;
  bottom: -4px;
  transform: translate(-50%, -50%);
  transform-origin: center center;
  transition: 0.2s ease-in-out;
}
.nav-list {
  list-style: none;
  padding: 8px 7px;
  margin: 0;
  box-sizing: border-box;
  width: 100%;
  opacity: 0;
  transition: opacity 0.1s ease-out;
  pointer-events: none;
}
.nav-list-item {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 8px 12px;
  box-sizing: border-box;
  border-radius: 8px;
  transition: 0.2s ease;
}
.nav-list-item i {
  color: white;
  font-size: 22px;
  flex-shrink: 0;
  margin-right: 12px;
}
.nav-list-item .nav-text {
  color: white;
  font-size: 15px;
  white-space: nowrap;
}
.nav-list-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
}
.nav-list-item.active {
  background-color: rgba(255, 255, 255, 0.2);
}
.nav-list .divider {
  height: 1.5px;
  width: calc(100% - 16px);
  background-color: rgba(255, 255, 255, 0.15);
  margin: 6px 8px;
  border-radius: 1px;
}

.nav-container.hover-active .nav-box {
  width: var(--nav-width-expanded);
  height: var(--nav-expanded-height);
  transform: scale(1) !important;
  box-shadow: none !important;
}
.nav-container.hover-active .current-page-icon {
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
}
.nav-container.hover-active .nav-list {
  opacity: 1;
  transition: opacity 0.2s ease-in-out 0.15s;
  pointer-events: auto;
}

.welcome-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.welcome-modal-card {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 11;
  color: #fff;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-5px);
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.welcome-overlay.visible,
.welcome-modal-card.visible {
  opacity: 1;
  pointer-events: auto;
}
.welcome-modal-card.visible {
  transform: translateX(-50%) translateY(0);
}
.welcome-modal-card.hiding {
  transform: translateX(-50%) translateY(0);
  transition: opacity 0.3s ease-out;
}
.welcome-modal-card h2 {
  margin: 0 0 12px;
  font-size: 20px;
}
.welcome-modal-card h2 i {
  margin-right: 8px;
  font-size: 22px;
  vertical-align: middle;
  font-weight: normal;
}
.welcome-modal-card p {
  margin: 6px 0 52px;
  font-size: 16px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.86);
}
.welcome-modal-confirm-button {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background-color: var(--button-bg);
  color: #fff;
  border: none;
  padding: 8px 16px;
  font-size: 1.15rem;
  font-weight: 700;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s ease;
}
.welcome-modal-confirm-button:hover {
  background-color: var(--button-hover);
  transform: scale(1.01);
}

.side-actions {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-left: 7px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.1s ease-out;
}
.nav-container.hover-active .side-actions {
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.2s ease-in-out 0.15s;
}
.side-action-btn {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  background-color: var(--fourth-bg);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: background-color 0.2s ease, transform 0.26s ease;
}
.side-action-btn:hover {
  background-color: var(--secondary-bg);
  transform: scale(1.05);
}
.side-action-btn.active {
  background-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}