.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-dark-surface);
  border-right: 1px solid var(--border-subtle);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-shrink: 0;
  transition: width 0.25s cubic-bezier(0.16, 1, 0.3, 1), padding 0.25s ease;
  overflow: hidden;
}

@media (min-width: 901px) {
  .app-sidebar.collapsed {
    width: 68px;
    padding: 24px 10px;
  }

  .app-sidebar.collapsed .sidebar-nav-title,
  .app-sidebar.collapsed .nav-link span,
  .app-sidebar.collapsed .channel-details {
    display: none;
  }

  .app-sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 12px 0;
  }

  .app-sidebar.collapsed .channel-info-card {
    justify-content: center;
    padding: 8px 0;
  }
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

#side-nav-thresholds {
  margin-top: auto;
  margin-bottom: 6px;
}

.sidebar-nav-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 8px 12px 4px 12px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.86rem;
  line-height: 1.2;
  transition: all var(--transition-fast);
  cursor: pointer;
  white-space: nowrap;
}

.nav-link span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.nav-link.active {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-primary);
  font-weight: 600;
  border-left: 3px solid #60a5fa;
}

.nav-link i {
  width: 18px;
  height: 18px;
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.channel-info-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.channel-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.channel-details {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.channel-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.channel-status {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2px;
  line-height: 1.1;
}

/* Mobile Sidebar Drawer Backdrop Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 240;
  opacity: 0;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 900px) {
  .app-sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: 280px;
    max-width: 85vw;
    z-index: 250;
    background: var(--bg-dark-surface);
    border-right: 1px solid var(--border-subtle);
    box-shadow: 8px 0 32px rgba(0, 0, 0, 0.6);
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), padding 0.25s ease;
    display: flex;
    padding: 20px 16px;
  }

  .app-sidebar.mobile-open {
    transform: translateX(0) !important;
  }

  .app-sidebar.collapsed {
    width: 280px; /* En móvil no se encoge a 68px, se oculta hacia la izquierda */
    transform: translateX(-100%);
    padding: 20px 16px;
  }

  .app-sidebar.collapsed .sidebar-nav-title,
  .app-sidebar.collapsed .nav-link span,
  .app-sidebar.collapsed .channel-details {
    display: flex !important;
  }

  .app-sidebar.collapsed .nav-link {
    justify-content: flex-start !important;
    padding: 12px 14px !important;
  }

  .app-sidebar.collapsed .channel-info-card {
    justify-content: flex-start !important;
    padding: 10px !important;
  }
}