/* ── Sidebar layout ──────────────────────────────────────────────────────── */
.sidebar {
  flex-shrink: 0;
  width: var(--sidebar-collapsed-width);
  height: var(--app-height, 100dvh);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-slow);
  overflow: hidden;
  z-index: var(--z-sidebar);
  position: relative;
}

.sidebar.expanded {
  width: var(--sidebar-width) + 5px;
}

.sidebar-mode-tabs {
  display: none;
  gap: 6px;
  padding: 10px 10px 0;
}

.sidebar.expanded .sidebar-mode-tabs {
  display: flex;
}

.sidebar-mode-tab {
  flex: 1;
  padding: 8px 10px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 12px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.sidebar-mode-tab.active {
  background: var(--bg-active);
  border-color: var(--border-bright);
  color: var(--text);
}

.sidebar-pane {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-subtabs {
  display: flex;
  gap: 6px;
  padding: 2px 4px 0;
}

.sidebar-subtab {
  flex: 1;
  padding: 7px 10px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 12px;
  transition: background var(--transition), color var(--transition);
}

.sidebar-subtab.active {
  background: var(--bg-active);
  color: var(--text);
}

.sidebar-toolbar-row,
.sidebar-selection-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  padding: 0 4px;
}

.sidebar-selection-bar {
  justify-content: space-between;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-raised);
  font-size: 12px;
  color: var(--text-dim);
}

.sidebar-action-btn {
  padding: 6px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-bright);
  color: var(--text-dim);
  font-size: 12px;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.sidebar-action-btn:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.sidebar-action-btn.danger {
  color: #f87171;
}

.sidebar-empty-state {
  padding: 18px 12px;
  color: var(--text-muted);
  font-size: 12px;
}

/* Top icon strip */
.sidebar-top {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 10px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--sidebar-border);
}

.sidebar.collapsed .sidebar-top {
  flex-direction: column;
  padding: 10px 10px;
  gap: 6px;
}

.sidebar.expanded .sidebar-top {
  flex-direction: row;
}

.sidebar-icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: var(--radius-md);
  color: var(--text-dim);
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.sidebar-icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text);
}

/* Sessions list */
.sidebar-sessions {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 6px 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.sidebar.expanded .sidebar-sessions {
  opacity: 1;
  pointer-events: auto;
}

.session-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.deleted-chat-list,
.media-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Session item */
.session-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
  min-width: 0;
}

.session-item:hover { background: var(--bg-hover); }
.session-item.active { background: var(--bg-active); }

.session-item .session-name {
  flex: 1;
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
  cursor: text;
}

.session-item .session-name[contenteditable="true"] {
  background: var(--bg-raised);
  border-radius: 4px;
  padding: 1px 4px;
  outline: 1px solid var(--blue-bright);
  white-space: nowrap;
  cursor: text;
}

.session-item .session-menu-btn {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity var(--transition), background var(--transition), color var(--transition);
  font-size: 16px; line-height: 1;
}

.session-item:hover .session-menu-btn,
.session-item.active .session-menu-btn {
  opacity: 1;
}

.session-item .session-menu-btn:hover {
  background: var(--bg-raised);
  color: var(--text);
}

/* Section label */
.session-date-label {
  font-size: 11px;
  color: var(--text-muted);
  padding: 8px 10px 3px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.deleted-chat-item,
.media-list-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border);
}

.deleted-chat-check,
.media-item-check {
  display: flex;
  align-items: center;
  justify-content: center;
}

.deleted-chat-copy,
.media-item-copy {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.deleted-chat-name,
.media-item-name {
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.deleted-chat-meta,
.media-item-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.deleted-chat-actions,
.media-item-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.deleted-chat-action,
.media-item-action {
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-dim);
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.deleted-chat-action:hover,
.media-item-action:hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
  color: var(--text);
}

.deleted-chat-action.danger,
.media-item-action.danger {
  color: #f87171;
}

.media-item-main {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
  text-align: left;
}

.media-item-icon {
  width: 24px;
  flex-shrink: 0;
  text-align: center;
  font-size: 16px;
}

.media-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  padding: 0 4px;
  font-size: 11px;
  color: var(--text-muted);
}

.media-breadcrumb {
  padding: 4px 8px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition);
}

.media-breadcrumb.active,
.media-breadcrumb:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.media-breadcrumb-sep {
  color: var(--text-muted);
}

/* Bottom account section */
.sidebar-bottom {
  flex-shrink: 0;
  padding: 8px;
  border-top: 1px solid var(--sidebar-border);
  overflow: hidden;
}

.account-section {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar.collapsed .account-section {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.sidebar.expanded .account-section {
  flex-direction: row;
  justify-content: space-between;
}

.btn-signin {
  flex: 1;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  background: var(--yellow);
  color: #111;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
  display: none;
}

.sidebar.expanded .btn-signin {
  opacity: 1;
  pointer-events: auto;
  display: block;
}

/* Collapsed sign-in icon */
.btn-signin-icon {
  display: none;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--yellow);
  color: #111;
  align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.sidebar.collapsed .btn-signin-icon {
  display: flex;
}
.sidebar.expanded .btn-signin-icon {
  display: none;
}

.user-profile-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  padding: 6px 8px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}
.user-profile-btn:hover { background: var(--bg-hover); }

.sidebar.collapsed .user-profile-btn {
  flex: none;
  width: 36px;
  height: 36px;
  justify-content: center;
  gap: 0px !important;
  /* padding: 0; */
  border-radius: 50%;
}

.user-avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600; color: white;
  flex-shrink: 0;
  transition: background var(--transition);
}
.user-avatar[data-plan="free"] { background: var(--plan-free); }
.user-avatar[data-plan="light"] { background: var(--plan-light); }
.user-avatar[data-plan="core"] { background: var(--plan-core); }
.user-avatar[data-plan="creator"] { background: var(--plan-creator); }
.user-avatar[data-plan="professional"] { background: var(--plan-professional); }

.user-info {
  display: flex; flex-direction: column;
  min-width: 0;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}

.sidebar.expanded .user-info {
  opacity: 1; pointer-events: auto;
}

.user-name {
  font-size: 13px; font-weight: 500;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.user-plan {
  font-size: 11px; font-weight: 600;
}
.user-plan[data-plan="free"] { color: var(--plan-free); }
.user-plan[data-plan="light"] { color: var(--plan-light); }
.user-plan[data-plan="core"] { color: var(--plan-core); }
.user-plan[data-plan="creator"] { color: var(--plan-creator); }
.user-plan[data-plan="professional"] { color: var(--plan-professional); }

/* Context menus */
.context-menu {
  position: fixed;
  background: var(--bg-raised);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-menu);
  overflow: hidden;
  min-width: 170px;
  animation: slideUp 0.14s ease;
}

.context-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 14px;
  font-size: 13px; color: var(--text);
  cursor: pointer;
  transition: background var(--transition);
}
.context-item:hover { background: var(--bg-hover); }
.context-item.danger { color: #f07070; }
.context-item.warning { color: var(--yellow); }
.context-item svg { flex-shrink: 0; color: var(--text-dim); }
.context-item.danger svg { color: #f07070; }
/* ══════════════════════════════════════════════════════════════════════════
/* ══════════════════════════════════════════════════════════════════════════
   MOBILE SIDEBAR — Top header bar + full-screen left drawer
   ══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {

  /* ── Root layout ── */
  #app {
    flex-direction: column !important;
    height: var(--app-height, 100dvh);
    overflow: hidden;
  }

  /* ── Sidebar: hidden off-screen left, slides in as full-screen overlay ── */
  .sidebar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: var(--app-height, 100dvh) !important;
    max-height: none !important;
    border-right: none !important;
    border-top: none !important;
    flex-direction: column !important;
    z-index: var(--z-sidebar);
    overflow: hidden;
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
  }

  .sidebar.collapsed {
    transform: translateX(-100%);
  }

  .sidebar.expanded {
    transform: translateX(0);
  }

  /* ── Sidebar inner top: header row ── */
  .sidebar-top {
    flex-direction: row !important;
    padding: 14px 16px !important;
    gap: 8px !important;
    border-bottom: 1px solid var(--sidebar-border) !important;
    flex-shrink: 0;
  }

  .sidebar-mode-tabs {
    display: flex !important;
    padding: 10px 16px 0;
  }

  /* Session list: scrollable */
  .sidebar-sessions {
    opacity: 1 !important;
    pointer-events: auto !important;
    overflow-y: auto;
    flex: 1;
    -webkit-overflow-scrolling: touch;
  }

  /* Bottom account section: always show */
  .sidebar-bottom {
    flex-shrink: 0;
    border-top: 1px solid var(--sidebar-border);
    display: block !important;
  }

  .account-section {
    flex-direction: row !important;
    align-items: center;
  }

  .btn-signin {
    display: block !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  .btn-signin-icon {
    display: none !important;
  }

  .user-info {
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  .user-profile-btn {
    flex: 1 !important;
    width: auto !important;
    justify-content: flex-start !important;
    border-radius: var(--radius-md) !important;
    gap: 9px !important;
  }

  /* ── Main: full viewport ── */
  #main {
    height: var(--app-height, 100dvh) !important;
    width: 100% !important;
    overflow: hidden;
  }

  /* ── Backdrop ── */
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    z-index: calc(var(--z-sidebar) - 1);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    will-change: opacity;
    transition: opacity 180ms ease, visibility 180ms ease;
  }

  .sidebar-backdrop.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
}

/* Sidebar refresh */
.sidebar-top {
  flex-direction: column;
  align-items: stretch;
  padding: 10px 10px 10px;
}

.sidebar.collapsed .sidebar-top {
  padding: 10px;
}

.sidebar-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
}

.sidebar.collapsed .sidebar-top-row {
  flex-direction: column;
  justify-content: flex-start;
}

.sidebar-top-switcher {
  display: none;
  width: 100%;
}

.sidebar.expanded .sidebar-top-switcher {
  display: block;
}

.sidebar-top-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-bright), transparent);
}

.sidebar-top-switcher-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-top: -10px;
  padding: 0 2px;
}

.sidebar-mode-tabs {
  display: flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 10px 24px rgba(0,0,0,0.18);
}

.sidebar-mode-tab {
  min-width: 60px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.sidebar-mode-tab.active {
  background: linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.06));
  border-color: transparent;
  box-shadow: 0 10px 18px rgba(0,0,0,0.18);
}

.sidebar-trash-btn {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.sidebar-trash-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
  color: var(--text);
  transform: translateY(-1px);
}

.sidebar-pane {
  flex: 1;
  min-height: 0;
  gap: 8px;
  overflow: hidden;
}

#sidebar-chat-pane,
#sidebar-media-pane {
  flex: 1;
  min-height: 0;
}

.sidebar-subtabs {
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0 2px 4px;
}

.sidebar-pane-heading {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.sidebar-pane-kicker {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.sidebar-pane-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.sidebar-create-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  color: var(--text);
  box-shadow: 0 12px 24px rgba(0,0,0,0.18);
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.sidebar-create-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
  transform: translateY(-1px);
  box-shadow: 0 16px 28px rgba(0,0,0,0.22);
}

.sidebar-create-btn.is-disabled,
.sidebar-create-btn[aria-disabled="true"] {
  opacity: 0.48;
  cursor: not-allowed;
  box-shadow: none;
}

.sidebar-create-btn.is-disabled:hover,
.sidebar-create-btn[aria-disabled="true"]:hover {
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  border-color: var(--border);
  transform: none;
  box-shadow: none;
}

.sidebar-create-plus {
  display: inline-flex;
  color: var(--yellow);
  font-size: 18px;
  font-weight: 500;
  line-height: 1;
}

.sidebar-sessions {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 8px;
  overflow: hidden;
}

.session-list,
.media-list,
.sidebar-trash-list {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  gap: 8px;
  min-height: 0;
  overflow-y: auto;
  padding-right: 2px;
}

.sidebar-trash-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px 8px;
  background:
    linear-gradient(180deg, rgba(18,18,22,0.98), rgba(18,18,22,0.95)),
    radial-gradient(circle at top right, rgba(229,200,70,0.08), transparent 42%);
  transform: translateX(104%);
  opacity: 0;
  pointer-events: none;
  box-shadow: -24px 0 38px rgba(0,0,0,0.24);
  transition: transform 220ms ease, opacity 220ms ease;
  z-index: 2;
}

.sidebar-sessions.trash-open .sidebar-trash-overlay {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.sidebar-sessions.trash-open .sidebar-pane {
  opacity: 0.34;
  transform: translateX(-16px);
  filter: saturate(0.7) blur(1px);
  transition: transform 220ms ease, opacity 220ms ease, filter 220ms ease;
}

.sidebar-trash-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 0 2px 2px;
}

.sidebar-back-btn {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text);
}

.sidebar-back-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-bright);
}

.sidebar-trash-heading {
  min-width: 0;
}

.sidebar-trash-title {
  font-size: 15px;
  font-weight: 600;
}

.sidebar-trash-subtitle {
  margin-top: 2px;
  font-size: 12px;
  color: var(--text-muted);
}

.sidebar-trash-list {
  flex: 1;
  overflow-y: auto;
  padding-right: 2px;
}

.deleted-chat-item,
.media-list-item {
  position: relative;
  gap: 10px;
  padding: 10px 11px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
  transition: transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.deleted-chat-item:hover,
.media-list-item:hover {
  transform: translateY(-1px);
  border-color: var(--border-bright);
  background: var(--bg-hover);
}

.deleted-chat-actions,
.media-item-actions {
  gap: 6px;
}

.deleted-chat-action,
.media-item-action {
  min-width: 60px;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: rgba(255,255,255,0.03);
}

.deleted-chat-action.danger,
.media-item-action.danger {
  background: rgba(220,60,60,0.08);
}

.media-item-main {
  border-radius: 12px;
}

.deleted-chat-check,
.media-item-check,
.media-picker-select {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.deleted-chat-check input,
.media-item-check input,
.media-picker-select input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.selection-checkmark {
  position: relative;
  width: 18px;
  height: 18px;
  border-radius: 7px;
  border: 1px solid var(--border-bright);
  background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.01));
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.18), 0 0 0 0 rgba(229,200,70,0);
  transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.selection-checkmark::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 5px;
  border-left: 2px solid #141414;
  border-bottom: 2px solid #141414;
  transform: translateY(-1px) rotate(-45deg) scale(0.75);
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition);
}

.deleted-chat-check input:hover + .selection-checkmark,
.media-item-check input:hover + .selection-checkmark,
.media-picker-select input:hover + .selection-checkmark {
  border-color: rgba(229,200,70,0.45);
  transform: translateY(-1px) scale(1.02);
}

.deleted-chat-check input:focus-visible + .selection-checkmark,
.media-item-check input:focus-visible + .selection-checkmark,
.media-picker-select input:focus-visible + .selection-checkmark {
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.18), 0 0 0 4px rgba(229,200,70,0.14);
}

.deleted-chat-check input:checked + .selection-checkmark,
.media-item-check input:checked + .selection-checkmark,
.media-picker-select input:checked + .selection-checkmark {
  background: var(--yellow);
  border-color: rgba(229,200,70,0.85);
  box-shadow: 0 8px 18px rgba(229,200,70,0.2), 0 0 0 4px rgba(229,200,70,0.12);
  transform: scale(1.02);
}

.deleted-chat-check input:checked + .selection-checkmark::after,
.media-item-check input:checked + .selection-checkmark::after,
.media-picker-select input:checked + .selection-checkmark::after {
  opacity: 1;
  transform: translateY(-1px) rotate(-45deg) scale(1);
}

.sidebar-selection-bar {
  gap: 10px;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(229,200,70,0.08);
  border-color: rgba(229,200,70,0.18);
}

.sidebar-selection-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.sidebar-action-btn {
  min-height: 30px;
  border-radius: 999px;
  background: var(--bg-surface);
}

.media-breadcrumbs {
  padding: 0 2px;
  margin-bottom: 2px;
}

[data-theme="light"] .sidebar-trash-overlay {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244,246,250,0.97)),
    radial-gradient(circle at top right, rgba(229,200,70,0.12), transparent 42%);
  box-shadow: -24px 0 38px rgba(123, 138, 163, 0.18);
}

[data-theme="light"] .sidebar-back-btn,
[data-theme="light"] .sidebar-action-btn,
[data-theme="light"] .deleted-chat-action,
[data-theme="light"] .media-item-action {
  background: rgba(255,255,255,0.88);
  border-color: rgba(20,24,33,0.08);
  color: rgba(20,24,33,0.74);
}

[data-theme="light"] .sidebar-back-btn:hover,
[data-theme="light"] .sidebar-action-btn:hover,
[data-theme="light"] .deleted-chat-action:hover,
[data-theme="light"] .media-item-action:hover {
  background: rgba(236,239,244,0.96);
  border-color: rgba(20,24,33,0.12);
  color: rgba(20,24,33,0.92);
}

[data-theme="light"] .deleted-chat-item,
[data-theme="light"] .media-list-item {
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(248,249,252,0.94));
  border-color: rgba(20,24,33,0.08);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.9);
}

[data-theme="light"] .deleted-chat-item:hover,
[data-theme="light"] .media-list-item:hover {
  background: rgba(236,239,244,0.92);
}

[data-theme="light"] .selection-checkmark {
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(237,240,245,0.94));
  border-color: rgba(20,24,33,0.12);
  box-shadow: inset 0 1px 2px rgba(123,136,159,0.12), 0 0 0 0 rgba(229,200,70,0);
}

[data-theme="light"] .sidebar-selection-bar {
  background: rgba(229,200,70,0.12);
  border-color: rgba(229,200,70,0.26);
}

[data-theme="light"] .rich-empty-state {
  background: rgba(255,255,255,0.78);
  border-color: rgba(20,24,33,0.14);
}

.media-breadcrumb-label {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.media-breadcrumb {
  border: 1px solid transparent;
}

.media-breadcrumb.active,
.media-breadcrumb:hover {
  border-color: var(--border);
}

.media-usage-panel {
  margin-top: auto;
  padding: 12px 12px 10px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(24,24,29,0.94), rgba(18,18,22,0.98));
  box-shadow: 0 -18px 32px rgba(0,0,0,0.18);
  backdrop-filter: blur(10px);
  flex-shrink: 0;
}

.media-usage-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.media-usage-label {
  font-size: 12px;
  font-weight: 600;
}

.media-usage-values,
.media-usage-meta {
  font-size: 11px;
  color: var(--text-muted);
}

.media-usage-percent {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
}

.media-usage-track {
  height: 8px;
  margin: 10px 0 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}

.media-usage-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(229,200,70,0.6), var(--yellow));
}

.media-usage-panel.warning .media-usage-fill {
  background: linear-gradient(90deg, #eab308, #f59e0b);
}

.media-usage-panel.danger .media-usage-fill {
  background: linear-gradient(90deg, #fb7185, #ef4444);
}

.media-usage-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.rich-empty-state {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  border-radius: 16px;
  border: 1px dashed var(--border-bright);
  background: rgba(255,255,255,0.02);
}

.rich-empty-state strong {
  font-size: 13px;
  color: var(--text);
}

.rich-empty-state span {
  font-size: 12px;
  color: var(--text-muted);
}

.context-item {
  gap: 12px;
  align-items: flex-start;
}

.context-item-icon {
  min-width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.context-item-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.context-item-label {
  font-size: 13px;
  color: inherit;
}

.context-item-description {
  font-size: 11px;
  line-height: 1.35;
  color: var(--text-muted);
}

/* Final sidebar and menu refinements */
.sidebar-top-divider {
  display: none;
  height: 0;
  background: transparent;
}

.sidebar-top-switcher-inner {
  margin-top: 0;
  padding: 2px 2px 0;
  align-items: center;
}

.sidebar-trash-btn {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
}

.sidebar-trash-btn:hover,
.sidebar-trash-btn:focus-visible {
  background: var(--bg-hover);
  border-color: var(--border);
}

.sidebar-create-btn {
  box-shadow: none;
}

.sidebar-create-btn:hover {
  box-shadow: none;
}

.sidebar-create-plus {
  transform: translateY(-1px);
}

#media-list {
  padding-right: 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

#media-list::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

.media-list-item {
  min-height: 66px;
  gap: 9px;
  padding: 8px 10px;
}

.media-item-main {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.media-item-copy {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.media-item-name {
  font-size: 12.5px;
  line-height: 1.22;
}

.media-item-kind,
.media-item-size {
  display: block;
  font-size: 10.5px;
  line-height: 1.22;
  color: var(--text-muted);
}

.media-item-menu {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.media-item-menu:hover,
.media-item-menu:focus-visible {
  background: var(--bg-hover);
  color: var(--text);
  border-color: var(--border);
  transform: translateY(-1px);
}

.media-item-menu-dots,
.session-menu-dots {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  letter-spacing: -0.08em;
  transform: translateY(-1px);
}

.media-item-menu-dots {
  font-size: 13px;
}

.session-item .session-menu-btn {
  width: 22px;
  height: 22px;
  padding: 0;
  border-radius: 8px;
  font-size: 13px;
}

.session-menu-dots {
  font-size: 12px;
}

.selection-checkmark::after {
  left: 50%;
  top: 50%;
  transform: translate(-50%, -58%) rotate(-45deg) scale(0.75);
}

.deleted-chat-check input:checked + .selection-checkmark::after,
.media-item-check input:checked + .selection-checkmark::after,
.media-picker-select input:checked + .selection-checkmark::after {
  transform: translate(-50%, -58%) rotate(-45deg) scale(1);
}

.media-usage-panel {
  background: linear-gradient(180deg, rgba(24,24,29,0.95), rgba(18,18,22,0.98));
}

[data-theme="light"] .media-usage-panel {
  background: linear-gradient(180deg, rgba(255,255,255,0.97), rgba(244,246,250,0.96));
  border-color: rgba(20,24,33,0.08);
  box-shadow: 0 -18px 28px rgba(125,136,159,0.14);
}

[data-theme="light"] .media-usage-track {
  background: rgba(20,24,33,0.08);
}

[data-theme="light"] .media-usage-percent,
[data-theme="light"] .media-usage-label {
  color: rgba(20,24,33,0.92);
}

[data-theme="light"] .media-usage-values,
[data-theme="light"] .media-usage-meta {
  color: rgba(20,24,33,0.58);
}

.context-menu {
  min-width: 156px;
  padding: 4px;
  border-radius: 16px;
}

.context-menu.context-menu-compact {
  min-width: 172px;
}

.context-menu.context-menu-rich {
  min-width: 222px;
}

.context-item {
  align-items: center;
  gap: 9px;
  min-height: 38px;
  padding: 7px 10px;
  border-radius: 12px;
}

.context-item.disabled {
  opacity: 0.48;
  cursor: not-allowed;
}

.context-item.disabled:hover {
  background: transparent;
}

.context-item.has-description {
  align-items: flex-start;
  min-height: 0;
  padding: 8px 10px;
}

.context-item-icon {
  min-width: 28px;
  width: 28px;
  height: 28px;
  border-radius: 10px;
  font-size: 10px;
}

.context-item-icon svg {
  width: 15px;
  height: 15px;
}

.context-item.has-description .context-item-icon {
  min-width: 32px;
  width: 32px;
  height: 32px;
}

.context-item-copy {
  justify-content: center;
  gap: 1px;
}

.context-item-label {
  font-size: 12.5px;
  line-height: 1.22;
}

.context-item-description {
  font-size: 10.5px;
  line-height: 1.34;
}

@media (max-width: 768px) {
  .sidebar-top {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 10px !important;
    padding: 14px 16px 10px !important;
  }

  .sidebar-top-switcher {
    display: block;
  }

  .sidebar-top-row {
    width: 100%;
  }

  .sidebar-sessions {
    padding: 8px 12px 12px;
  }
}