/* ========================================
   Sidebar Component — padhLe (Bauhaus)
   ======================================== */

/* Main Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--color-surface);
  border-right: var(--border-thick);
  display: flex;
  flex-direction: column;
  padding: var(--spacing-lg);
  overflow-y: auto;
  z-index: 10;
}

.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
  background-color: var(--color-outline);
  border-radius: 2px;
}

/* Brand */
.sidebar__brand {
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border-bottom: var(--border-medium);
}

.sidebar__title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

/* New Chat Button */
.sidebar__new-chat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  width: 100%;
  padding: var(--spacing-sm);
  border: var(--border-medium);
  border-radius: var(--border-radius);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  box-shadow: var(--shadow-brutal-sm);
  transition: all var(--transition-fast);
  margin-bottom: var(--spacing-lg);
}

.sidebar__new-chat:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-brutal);
}

.sidebar__new-chat:active {
  transform: translateY(2px);
  box-shadow: none;
}

/* Section */
.sidebar__section {
  margin-bottom: var(--spacing-md);
}

.sidebar__section--history {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

.sidebar__section-title {
  font-family: var(--font-heading);
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-variant);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-sm);
}

/* Subject List */
.sidebar__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm);
  border: var(--border-medium);
  border-radius: var(--border-radius);
  background: transparent;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-variant);
  text-align: left;
  box-shadow: var(--shadow-brutal-sm);
  transition: all var(--transition-fast);
}

.sidebar__link:hover {
  background-color: var(--color-surface-variant);
  color: var(--color-text);
  transform: translateY(-1px);
}

.sidebar__link--active {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-outline);
}

.sidebar__link--active:hover {
  color: var(--color-on-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-brutal);
}

.sidebar__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  font-size: 0.95rem;
}

/* Chat List */
.sidebar__chat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar__chat-link {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: var(--spacing-sm);
  padding-left: var(--spacing-sm);
  border: var(--border-medium);
  border-radius: var(--border-radius);
  background: transparent;
  cursor: pointer;
  font-family: var(--font-body);
  text-align: left;
  box-shadow: var(--shadow-brutal-sm);
  transition: all var(--transition-fast);
}

.sidebar__chat-link:hover {
  background-color: var(--color-surface-variant);
  transform: translateY(-1px);
}

.sidebar__chat-link--active {
  background-color: var(--color-surface-container);
  box-shadow: var(--shadow-brutal);
}

.sidebar__chat-preview {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__chat-time {
  font-family: var(--font-body);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-variant);
  margin-top: 4px;
}

/* Footer */
.sidebar__footer {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: var(--spacing-sm);
  border-top: var(--border-medium);
  margin-top: auto;
}

.sidebar__footer-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm);
  border: var(--border-medium);
  border-radius: var(--border-radius);
  background: transparent;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-variant);
  text-align: left;
  box-shadow: var(--shadow-brutal-sm);
  transition: all var(--transition-fast);
}

.sidebar__footer-btn:hover {
  background-color: var(--color-surface-variant);
  color: var(--color-text);
  transform: translateY(-1px);
}

.sidebar__footer-btn:active {
  transform: translateY(2px);
  box-shadow: none;
}