.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 3.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding-top: 4rem;
  padding-bottom: 0.75rem;
  z-index: 50;
}

.sidebar-title {
  position: absolute;
  left: 0.75rem;
  top: 0;
  font-family: Agbalumo, serif;
  font-size: 2.25rem;
  line-height: 2.5rem;
}

.sidebar-divider {
  position: absolute;
  top: 2.75rem;
  left: 0;
  width: 100%;
  height: 2px;
}

.nav-btn {
  color: var(--niche-accent, #0a4f98);
  width: 44px;
  height: 44px;
  border-radius: 50% !important;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.nav-btn svg {
  opacity: 0.6;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.nav-btn:hover svg {
  opacity: 1;
  transform: scale(1.08);
}

.nav-btn:active svg {
  transform: scale(0.94);
}

button:active {
  transform: scale(0.96);
}

.main-frame {
  position: fixed;
  top: 0;
  right: 0;
  width: calc(100% - 50px);
  height: 100vh;
  border: 0;
}

.page-loader {
  position: fixed;
  top: 0;
  right: 0;
  width: calc(100% - 50px);
  height: 100vh;
  z-index: 40;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.5rem;
}

.page-loader-title {
  font-family: Agbalumo, serif;
  font-size: 5rem;
  line-height: 1;
}

.page-loader-text {
  display: none;
  font-size: 1.25rem;
}

.chat-popup {
  position: fixed;
  bottom: 0.75rem;
  right: 0.75rem;
  z-index: 50;
  width: 300px;
  font-size: 0.875rem;
}

.chat-messages {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.5rem;
  max-height: 30vh;
}

.chat-input {
  flex: 1;
  min-width: 0;
  height: 2.25rem;
  border-radius: 0.75rem;
  padding: 0 0.5rem;
  font-size: 0.875rem;
  outline: none;
}

@keyframes lapis-rise {
  from { opacity: 0; transform: translateY(14px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

@keyframes lapis-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.sidebar-title {
  animation: lapis-fade 0.5s ease both;
}

.sidebar .nav-btn {
  animation: lapis-rise 0.45s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.sidebar .nav-btn:nth-of-type(1) { animation-delay: 0.05s; }
.sidebar .nav-btn:nth-of-type(2) { animation-delay: 0.1s; }
.sidebar .nav-btn:nth-of-type(3) { animation-delay: 0.15s; }
.sidebar .nav-btn:nth-of-type(4) { animation-delay: 0.2s; }
.sidebar .nav-btn:nth-of-type(5) { animation-delay: 0.25s; }
.sidebar .nav-btn:nth-of-type(6) { animation-delay: 0.3s; }
.sidebar .nav-btn:nth-of-type(7) { animation-delay: 0.35s; }
.sidebar .nav-btn:nth-of-type(8) { animation-delay: 0.4s; }

.main-frame {
  animation: lapis-fade 0.5s ease both;
}

.chat-popup:not([hidden]) {
  animation: lapis-rise 0.3s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

@media (prefers-reduced-motion: reduce) {
  .sidebar-title,
  .sidebar .nav-btn,
  .main-frame,
  .chat-popup:not([hidden]) {
    animation: none;
  }
}

@keyframes lapis-page-in {
  from { opacity: 0; transform: translateY(14px) scale(0.99); }
  to { opacity: 1; transform: none; }
}

.main-frame {
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.main-frame.page-exit {
  opacity: 0;
  transform: translateY(10px) scale(0.995);
}

.main-frame.page-enter {
  animation: lapis-page-in 0.45s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

@media (prefers-reduced-motion: reduce) {
  .main-frame,
  .main-frame.page-exit,
  .main-frame.page-enter {
    transition: none;
    animation: none;
  }
}

html body {
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}
input, textarea, [contenteditable="true"] {
  user-select: text;
  -webkit-user-select: text;
  -webkit-touch-callout: default;
}