/* ── CSS variables fallback for non-claude themes ───────── */
:root {
  /* --sidebar is used by win11-explorer (file picker) in all themes */
  --sidebar: #16161f;   /* same as --surf in dark (default) */
}

/* Base send button (fallback for non-claude themes) */
.send-btn {
  padding: 10px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: .2s;
}
.send-btn:hover { background: var(--accent2); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

[data-theme="light"] {
  --bg:       #f8fafc;
  --surf:     #ffffff;
  --surf2:    #f1f5f9;
  --border:   #e2e8f0;
  --accent:   #7c3aed;
  --accent2:  #6d28d9;
  --green:    #059669;
  --orange:   #d97706;
  --red:      #dc2626;
  --blue:     #2563eb;
  --text:     #1e293b;
  --muted:    #64748b;
  --sidebar:  #ffffff;  /* win11-explorer bg in light theme */
}

[data-theme="claude"] {
  --bg:       #1c1917;
  --surf:     #1c1917;
  --surf2:    #292524;
  --border:   #3f3f3a;
  --accent:   #d97757;
  --accent2:  #e88c6a;
  --green:    #34d399;
  --orange:   #fbbf24;
  --red:      #f87171;
  --blue:     #60a5fa;
  --text:     #e7e5e4;
  --muted:    #a8a29e;
  --sidebar:  #0c0a09;
}

[data-theme="claude"] body { background: var(--bg); }

/* Hide old layout in Claude theme */
[data-theme="claude"] .topbar { display: none !important; }
[data-theme="claude"] .main { display: none !important; }
[data-theme="claude"] .chat-title-bar { display: none !important; }

/* Show Claude app */
[data-theme="claude"] .claude-app {
  display: flex !important;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

[data-theme="claude"] .claude-main {
  display: flex !important;
  flex-direction: column;
  flex: 1;
  margin-left: 260px;
  position: relative;
}

/* Sidebar */
[data-theme="claude"] .claude-sidebar {
  display: flex;
  flex-direction: column;
  width: 260px;
  height: 100vh;
  background: #0c0a09;
  border-right: 1px solid #292524;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  padding: 16px 12px 0;  /* bottom padding removed — footer handles it */
  transition: left 0.25s ease;
  overflow: hidden; /* no sidebar-level scroll — inner sections handle it */
}

[data-theme="claude"] .claude-sidebar.hidden {
  left: -260px;
}

[data-theme="claude"] .claude-sidebar-logo {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 4px;
}
[data-theme="claude"] .claude-sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

[data-theme="claude"] .claude-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: .15s;
  text-decoration: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

[data-theme="claude"] .claude-nav-item:hover {
  background: #292524;
}

[data-theme="claude"] .claude-nav-item .icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

[data-theme="claude"] .claude-nav-item .badge {
  margin-left: auto;
  font-size: 11px;
  padding: 2px 8px;
  background: rgba(217,119,87,.15);
  color: var(--accent);
  border-radius: 4px;
}

[data-theme="claude"] .claude-sidebar-section-title {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin: 16px 0 8px;
  padding: 0 10px;
}

/* Recents / Pins tab bar */
[data-theme="claude"] .claude-section-tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 0 6px;
  margin: 12px 0 6px;
}
[data-theme="claude"] .cst-btn {
  display: flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .05em;
  color: var(--muted);
  background: none; border: none;
  padding: 4px 8px; border-radius: 6px;
  cursor: pointer; transition: .15s;
}
[data-theme="claude"] .cst-btn:hover { color: var(--text); background: rgba(255,255,255,.06); }
[data-theme="claude"] .cst-btn.active { color: var(--text); background: rgba(255,255,255,.08); }
[data-theme="claude"] .cst-btn svg { opacity: .7; }

/* Chat list wrapper — non-scrolling, holds the gradient overlay */
[data-theme="claude"] .claude-sidebar-chats-wrap {
  flex: 1;
  min-height: 0;
  position: relative;
  overflow: hidden;
}
/* Gradient fade — now on the non-scrolling wrapper so it stays fixed */
[data-theme="claude"] .claude-sidebar-chats-wrap::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 48px;
  background: linear-gradient(to bottom, transparent, #0c0a09);
  pointer-events: none;
  z-index: 1;
}

[data-theme="claude"] .claude-sidebar-chats {
  height: 100%;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding-bottom: 40px; /* space for gradient */
}

/* Sidebar chat skeleton — shown while loadChats() is in flight */
[data-theme="claude"] .cskel {
  display: flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 8px;
  opacity: 0;
  animation: cskelIn 0.18s ease both;
  animation-delay: calc(var(--i, 0) * 0.03s);
}
@keyframes cskelIn {
  to { opacity: 1; }
}
[data-theme="claude"] .cskel-line {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(
    90deg,
    #3a3632 20%,
    #5a534e 50%,
    #3a3632 80%
  );
  background-size: 300px 100%;
  animation: cskelShimmer 1.4s infinite linear;
}
@keyframes cskelShimmer {
  from { background-position: -300px 0; }
  to   { background-position:  300px 0; }
}

[data-theme="claude"] .claude-sidebar-chat {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px 7px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  position: relative;
  min-height: 32px;
  flex-shrink: 0;
}

[data-theme="claude"] .claude-sidebar-chat:hover {
  background: color-mix(in srgb, var(--text) 8%, transparent);
  color: var(--text);
}

[data-theme="claude"] .claude-sidebar-chat.active {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--text);
  font-weight: 500;
}

/* Accent left bar for active chat */
[data-theme="claude"] .claude-sidebar-chat.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}

[data-theme="claude"] .claude-sidebar-chat-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

[data-theme="claude"] .claude-sidebar-chat .claude-chat-actions {
  display: none;
  gap: 2px;
  flex-shrink: 0;
  margin-left: 2px;
}

[data-theme="claude"] .claude-sidebar-chat:hover .claude-chat-actions {
  display: flex;
}

[data-theme="claude"] .claude-chat-action {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 5px;
  cursor: pointer;
  opacity: 0.5;
  transition: .15s;
  color: var(--muted);
  flex-shrink: 0;
}

[data-theme="claude"] .claude-chat-action:hover {
  opacity: 1;
  background: #3f3f3a;
  color: var(--text);
}
[data-theme="claude"] .claude-chat-action.pinned {
  opacity: 0.9;
  color: #f59e0b; /* amber for pinned */
}

/* Sidebar sections below chat list: flex-shrink:0 so they don't collapse */
[data-theme="claude"] .claude-sidebar-below {
  flex-shrink: 0;
}

[data-theme="claude"] .claude-sidebar-footer {
  flex-shrink: 0;
  padding: 10px 0 12px;
  border-top: 1px solid #292524;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---- Chat History Modal ---- */
.chats-modal {
  width: 680px;
  max-width: 90vw;
  height: 520px;
  max-height: 80vh;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
  transform: scale(0.95);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.16,1,0.3,1), opacity 0.2s ease;
}
.modal-overlay.active .chats-modal {
  transform: scale(1);
  opacity: 1;
}
[data-theme="claude"] .chats-modal {
  background: #1c1917;
  border-color: #292524;
}
.chats-modal-titlebar {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
[data-theme="claude"] .chats-modal-titlebar { border-color: #292524; }
.chats-modal-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--text);
}
.chats-modal-header-actions { display: flex; align-items: center; gap: 6px; }
.chats-modal-new-btn {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 500; color: var(--text);
  background: var(--surf2); border: 1px solid var(--border);
  padding: 5px 10px; border-radius: 6px; cursor: pointer; transition: .15s;
}
.chats-modal-new-btn:hover { background: var(--border); }
[data-theme="claude"] .chats-modal-new-btn {
  background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.1);
}
[data-theme="claude"] .chats-modal-new-btn:hover { background: rgba(255,255,255,.1); }
.chats-modal-search {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
[data-theme="claude"] .chats-modal-search { border-color: #292524; }
.chats-modal-search input {
  width: 100%;
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  padding: 6px 10px;
  outline: none;
  transition: border-color .15s;
}
[data-theme="claude"] .chats-modal-search input {
  background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.1);
}
.chats-modal-search input:focus { border-color: var(--accent); }
.chats-modal-list {
  flex: 1; overflow-y: auto; padding: 4px 8px;
}
.chats-modal-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: 8px;
  cursor: pointer; transition: background .12s;
  color: var(--text); font-size: 13px;
}
.chats-modal-item:hover { background: var(--surf2); }
[data-theme="claude"] .chats-modal-item:hover { background: rgba(255,255,255,.06); }
.chats-modal-item-icon { color: var(--muted); flex-shrink: 0; }
.chats-modal-item-title {
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.chats-modal-item-date { font-size: 11px; color: var(--muted); flex-shrink: 0; }
.chats-modal-item-actions {
  display: flex; gap: 2px; flex-shrink: 0;
  opacity: 0; transition: opacity .12s;
}
.chats-modal-item:hover .chats-modal-item-actions { opacity: 1; }
.chats-modal-action {
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 5px; cursor: pointer;
  color: var(--muted); transition: .12s;
  background: none; border: none;
}
.chats-modal-action:hover { background: var(--border); color: var(--text); }
[data-theme="claude"] .chats-modal-action:hover { background: #3f3f3a; }
.chats-modal-action.pinned { color: #f59e0b; opacity: 1; }
.chats-modal-empty {
  text-align: center; color: var(--muted); padding: 48px 16px; font-size: 13px;
}

[data-theme="claude"] .claude-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #44403c;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  flex-shrink: 0;
}

[data-theme="claude"] .claude-user-info {
  flex: 1;
  min-width: 0;
}

[data-theme="claude"] .claude-user-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

[data-theme="claude"] .claude-user-plan {
  font-size: 11px;
  color: var(--muted);
}

[data-theme="claude"] .claude-user-menu-btn {
  padding: 6px;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  border-radius: 6px;
  transition: background .15s, color .15s;
  display: flex;
  align-items: center;
}
[data-theme="claude"] .claude-user-menu-btn:hover {
  background: rgba(255,255,255,.08);
  color: var(--text);
}
[data-theme="claude"] .claude-user-menu-btn.active {
  background: rgba(217,119,87,.15);
  color: var(--accent);
}

/* Group the two footer icon buttons */
[data-theme="claude"] .claude-footer-btns {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

/* ── Claude Settings Panel ──────────────────────────────────────────── */
/* .claude-settings-panel removed — replaced by #settings-modal-overlay */
[data-theme="claude"] .claude-settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  border-bottom: 1px solid #292524;
}
[data-theme="claude"] .claude-settings-close {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 2px;
  display: flex;
  align-items: center;
  border-radius: 4px;
  transition: color .15s;
}
[data-theme="claude"] .claude-settings-close:hover { color: var(--text); }

[data-theme="claude"] .claude-settings-body {
  padding: 4px 0;
}
[data-theme="claude"] .claude-settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 14px;
  cursor: pointer;
  transition: background .15s;
  user-select: none;
}
[data-theme="claude"] .claude-settings-row:hover {
  background: rgba(255,255,255,.04);
}
[data-theme="claude"] .claude-settings-row-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
[data-theme="claude"] .claude-settings-row-icon {
  color: var(--muted);
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
[data-theme="claude"] .claude-settings-row-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}
[data-theme="claude"] .claude-settings-row-desc {
  font-size: 11px;
  color: var(--muted);
  margin-top: 1px;
}

/* Toggle override for Claude theme */
[data-theme="claude"] .settings-toggle {
  background: #3f3f3a;
}
[data-theme="claude"] .settings-toggle.on {
  background: var(--accent);
}

/* Header */
[data-theme="claude"] .claude-header {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 12px 24px;
  gap: 12px;
  flex-shrink: 0;
}

[data-theme="claude"] .claude-header-plan {
  font-size: 13px;
  color: var(--muted);
}

[data-theme="claude"] .claude-header-plan a {
  color: var(--accent2);
  text-decoration: none;
}

[data-theme="claude"] .claude-header-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #292524;
  border: 1px solid #3f3f3a;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 14px;
}

[data-theme="claude"] .claude-sidebar-toggle {
  padding: 6px 10px;
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  margin-right: auto;
  border-radius: 6px;
  transition: .15s;
}

[data-theme="claude"] .claude-sidebar-toggle:hover {
  background: #292524;
  color: var(--text);
}

/* Welcome view */
[data-theme="claude"] .claude-welcome-view {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.28s ease;
}
[data-theme="claude"] .claude-welcome-view.visible {
  opacity: 1;
}

[data-theme="claude"] .claude-welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  gap: 32px;
}

[data-theme="claude"] .claude-welcome-title {
  font-size: 36px;
  font-weight: 400;
  color: var(--text);
  text-align: center;
}

[data-theme="claude"] .claude-welcome-title .star {
  color: var(--accent);
  margin-right: 8px;
}

[data-theme="claude"] .claude-input-wrapper {
  display: block;
  width: 100%;
  max-width: 768px;
}

[data-theme="claude"] .claude-input-box {
  background: #292524;
  border: 1px solid #3f3f3a;
  border-radius: 20px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

[data-theme="claude"] .claude-input-box textarea {
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 16px;
  resize: none;
  outline: none;
  min-height: 44px;
  max-height: 200px;
  font-family: inherit;
  width: 100%;
  overflow-y: hidden;
  transition: height 0.1s ease;
}

[data-theme="claude"] .claude-input-box textarea::placeholder {
  color: #78716c;
}

[data-theme="claude"] .claude-input-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

[data-theme="claude"] .claude-input-left {
  display: flex;
  gap: 8px;
  align-items: center;
}

[data-theme="claude"] .claude-input-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

[data-theme="claude"] .claude-tool-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: transparent;
  border: none;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: .15s;
}

[data-theme="claude"] .claude-tool-btn:hover {
  background: #3f3f3a;
  color: var(--text);
}

[data-theme="claude"] .claude-tool-btn.active {
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

[data-theme="claude"] .claude-model-select {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  outline: none;
}

[data-theme="claude"] .claude-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 12px;
}

[data-theme="claude"] .claude-chip {
  padding: 6px 14px;
  background: #292524;
  border: 1px solid #3f3f3a;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  transition: .15s;
  display: flex;
  align-items: center;
  gap: 6px;
}

[data-theme="claude"] .claude-chip:hover {
  background: #3f3f3a;
  color: var(--text);
}

/* Chat view */
[data-theme="claude"] .claude-chat-view {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  position: relative;
}

[data-theme="claude"] .claude-messages {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow-y: auto;
  padding: 24px 24px 24px 32px;
  gap: 24px;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}

[data-theme="claude"] .message {
  animation: none;
  max-width: 100%;
}

[data-theme="claude"] .message.user {
  justify-content: flex-end;
}

[data-theme="claude"] .message.user .message-bubble {
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 18px 18px 4px 18px;
  padding: 10px 14px;
  max-width: 70%;
  margin-left: auto;
}

[data-theme="claude"] .message.assistant {
  flex-direction: column;
  align-items: flex-start;
}

[data-theme="claude"] .message.assistant .message-bubble {
  display: flex;
  gap: 12px;
  background: transparent;
  border: none;
  max-width: 100%;
  padding: 0;
  color: var(--text);
}

[data-theme="claude"] .msg-avatar {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: #d97757;
  color: white;
  border-radius: 50%;
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 4px;
}
[data-theme="claude"] .msg-avatar .icon-svg svg {
  width: 16px;
  height: 16px;
}

[data-theme="claude"] .msg-content { flex: 1; }

[data-theme="claude"] .msg-actions {
  display: flex !important;
  gap: 8px;
  margin-top: 8px;
  padding-top: 8px;
  flex-wrap: wrap;
}

[data-theme="claude"] .msg-action-btn {
  padding: 3px 10px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

[data-theme="claude"] .msg-action-btn:hover {
  background: var(--surf);
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

[data-theme="claude"] .markdown-content pre {
  background: #292524;
  border-radius: 8px;
  padding: 1rem;
  font-family: monospace;
  border: 1px solid #3d3634;
  position: relative;
}

[data-theme="claude"] .markdown-content code {
  background: #292524;
}

[data-theme="claude"] .code-block {
  background: #0c0a09;
  border: 1px solid #292524;
}

[data-theme="claude"] .copy-btn {
  background: rgba(96,165,250,.1);
  color: var(--blue);
  border-color: rgba(96,165,250,.2);
}

/* Chat input pinned to bottom */
[data-theme="claude"] .claude-chat-view .claude-input-wrapper {
  padding: 16px 24px 32px;
  flex-shrink: 0;
  width: 100%;
  max-width: 768px;
  margin: 0 auto;
}

/* Empty state */
[data-theme="claude"] .empty-state {
  color: var(--muted);
  text-align: center;
}

[data-theme="claude"] .empty-state-title {
  color: var(--text);
}

/* Modal */
[data-theme="claude"] .modal-content {
  background: #292524;
  border: 1px solid #3f3f3a;
}

[data-theme="claude"] .modal-btn-secondary {
  background: #1c1917;
  border-color: #3f3f3a;
  color: var(--text);
}

[data-theme="claude"] .modal-btn-secondary:hover {
  background: #3f3f3a;
}

[data-theme="claude"] .rag-sources {
  background: rgba(217,119,87,.08);
  border-left-color: var(--accent);
}

[data-theme="claude"] .attachment-badge {
  background: rgba(96,165,250,.1);
  color: var(--blue);
}

[data-theme="claude"] .tool-card {
  background: #292524;
  border-left-color: var(--accent);
}

[data-theme="claude"] .tool-output {
  background: #0c0a09;
  border-left-color: var(--accent);
}

[data-theme="claude"] .message-attachments {
  background: #1c1917;
}

/* Scrollbar (V3) */
[data-theme="claude"] ::-webkit-scrollbar { width: 5px; }
[data-theme="claude"] ::-webkit-scrollbar-track { background: transparent; }
[data-theme="claude"] ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; transition: background 0.2s; }
[data-theme="claude"] ::-webkit-scrollbar-thumb:hover { background: var(--muted); }
[data-theme="claude"] * { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }

/* Attached files preview in Claude input */
[data-theme="claude"] .claude-attached-files {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
[data-theme="claude"] .claude-attached-file {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(217,119,87,.1);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--accent);
}
[data-theme="claude"] .claude-attached-file .remove {
  cursor: pointer;
  opacity: 0.6;
}
[data-theme="claude"] .claude-attached-file .remove:hover {
  opacity: 1;
}

/* ============================================
   VISUAL ENHANCEMENTS (V1-V14)
   ============================================ */

/* V1: Message entrance animations */
[data-theme="claude"] .message {
  animation: msgIn 0.22s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

[data-theme="claude"] .message.user {
  animation: msgInUser 0.2s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes msgInUser {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* V2: Streaming cursor */
[data-theme="claude"] .message.streaming::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 1.1em;
  background: var(--accent);
  border-radius: 2px;
  margin-left: 3px;
  vertical-align: text-bottom;
  animation: blink 0.9s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}

/* V9: Toast notifications */
#toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.875rem;
  color: var(--text);
  background: var(--surf);
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: auto;
}

.toast.toast-visible {
  opacity: 1;
  transform: translateY(0);
}

.toast.toast-info    { border-left: 3px solid var(--accent); }
.toast.toast-success { border-left: 3px solid #4ade80; }
.toast.toast-error   { border-left: 3px solid #f87171; }

/* Scroll-to-bottom FAB */
[data-theme="claude"] .scroll-to-bottom-btn {
  position: fixed;
  bottom: 100px;
  right: 32px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  border: none;
  font-size: 18px;
  line-height: 36px;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 100;
  display: none;
}
[data-theme="claude"] .scroll-to-bottom-btn.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  display: flex;
}

/* Search panel in sidebar */
.claude-search-panel {
  padding: 0 12px 8px;
}
.claude-search-input {
  width: 100%;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--text);
  font-size: 13px;
  outline: none;
}
.claude-search-input::placeholder {
  color: var(--muted);
}
.claude-search-input:focus {
  border-color: var(--accent);
}
.claude-search-results {
  margin-top: 6px;
  max-height: 200px;
  overflow-y: auto;
}
.claude-search-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text);
}
.claude-search-result:hover {
  background: var(--surf);
}
.claude-search-result .search-result-date {
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
  margin-left: 8px;
}

/* Char counter */
.char-counter {
  text-align: right;
  font-size: 11px;
  color: var(--muted);
  padding: 4px 4px 0;
  transition: color 0.2s ease;
}
.char-counter.over-limit {
  color: #d97757;
}
.char-counter.blocked {
  color: #f87171;
}

/* ============================================
   VISUAL ENHANCEMENTS — REMAINING (V4,V6,V7,V8,V10,V11,V12,V13,V14)
   ============================================ */

/* V4: Gradient moved to .claude-sidebar-chats-wrap::after (see above) */

/* V5补充: Avatar pulse during streaming */
[data-theme="claude"] .message.streaming .msg-avatar {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
  animation: avatarPulse 1.5s ease-in-out infinite;
}
@keyframes avatarPulse {
  0%, 100% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }
  50%       { box-shadow: 0 0 0 7px color-mix(in srgb, var(--accent) 8%, transparent); }
}

/* V6: Nav hover effects (enhanced) */
[data-theme="claude"] .claude-nav-item {
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
  color: var(--muted);
  transition: background 0.15s ease, color 0.15s ease, padding-left 0.15s ease;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
}
[data-theme="claude"] .claude-nav-item:hover {
  background: color-mix(in srgb, var(--text) 7%, transparent);
  color: var(--text);
  padding-left: 14px;
}
[data-theme="claude"] .claude-nav-item.active {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--text);
}

/* V7: Input focus glow */
[data-theme="claude"] .claude-input-box {
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
[data-theme="claude"] .claude-input-box:focus-within {
  border-color: color-mix(in srgb, var(--accent) 60%, transparent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

/* V8: Chip hover shimmer */
[data-theme="claude"] .claude-chip {
  position: relative;
  overflow: hidden;
  border-radius: 999px;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
[data-theme="claude"] .claude-chip:hover {
  border-color: var(--accent);
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
[data-theme="claude"] .claude-chip::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--accent) 20%, transparent),
    transparent
  );
  transition: left 0.4s ease;
  pointer-events: none;
}
[data-theme="claude"] .claude-chip:hover::before {
  left: 160%;
}

/* V10: Date dividers */
[data-theme="claude"] .date-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 20px 0 8px;
}
[data-theme="claude"] .date-divider::before,
[data-theme="claude"] .date-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* V11: Welcome noise texture + gradient title */
[data-theme="claude"] .claude-welcome {
  position: relative;
}
[data-theme="claude"] .claude-welcome::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  border-radius: inherit;
  opacity: 0.6;
}
[data-theme="claude"] .claude-welcome-title {
  background: linear-gradient(135deg, var(--text) 0%, var(--muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* V12: Send button states */
[data-theme="claude"] .send-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #d97757;
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  flex-shrink: 0;
  box-shadow: 0 0 0 0 rgba(217, 119, 87, 0);
}
[data-theme="claude"] .send-btn.hidden {
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
}
[data-theme="claude"] .send-btn:hover:not(:disabled) {
  transform: scale(1.12);
  background: #e88d6a;
  box-shadow: 0 0 20px rgba(217, 119, 87, 0.4), 0 0 40px rgba(217, 119, 87, 0.15);
}
[data-theme="claude"] .send-btn:active:not(:disabled) {
  transform: scale(0.92);
  box-shadow: 0 0 8px rgba(217, 119, 87, 0.3);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
[data-theme="claude"] .send-btn:disabled {
  background: var(--border);
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}
[data-theme="claude"] .send-btn .icon-svg svg {
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}
[data-theme="claude"] .send-btn:hover:not(:disabled) .icon-svg svg {
  transform: translateY(-1px);
}
[data-theme="claude"] .send-btn.loading::after {
  content: '';
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
[data-theme="claude"] .send-btn.loading > * { display: none; }
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes sendPulse {
  0% { box-shadow: 0 0 0 0 rgba(217, 119, 87, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(217, 119, 87, 0); }
  100% { box-shadow: 0 0 0 0 rgba(217, 119, 87, 0); }
}
[data-theme="claude"] .send-btn:focus-visible:not(:disabled) {
  animation: sendPulse 1.2s ease-out infinite;
}

/* V13: Sidebar subtle gradient */
[data-theme="claude"] .claude-sidebar {
  background: linear-gradient(
    180deg,
    #0f0d0c 0%,
    var(--sidebar) 40%,
    #080604 100%
  );
}

/* V14: Skeleton loading */
@keyframes shimmer {
  from { background-position: -400px 0; }
  to   { background-position: 400px 0; }
}
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surf) 25%,
    color-mix(in srgb, var(--surf) 70%, var(--text)) 50%,
    var(--surf) 75%
  );
  background-size: 800px 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 8px;
}
.skeleton-message {
  display: flex;
  gap: 10px;
  padding: 12px 0;
}
.skeleton-avatar { width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0; }
.skeleton-lines  { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.skeleton-line   { height: 14px; }
.skeleton-line.short { width: 45%; }

/* ============================================
   VISUAL ENHANCEMENTS V15+ — NEW ANIMATIONS
   ============================================ */

/* V15: Smooth color transitions across all theme elements */
[data-theme="claude"] *,
[data-theme="claude"] *::before,
[data-theme="claude"] *::after {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}
/* Override: keep instant transitions for performance-critical properties */
[data-theme="claude"] .message,
[data-theme="claude"] .claude-main {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}
/* Sidebar needs 'left' for drawer slide animation — keep it alongside color transitions */
[data-theme="claude"] .claude-sidebar {
  transition: left 0.25s ease, background-color 0.3s ease, border-color 0.3s ease;
}

/* V16: Typing indicator bounce */
[data-theme="claude"] .typing-indicator {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 8px 0;
}
[data-theme="claude"] .typing-indicator .dot {
  width: 6px;
  height: 6px;
  background: var(--muted);
  border-radius: 50%;
  animation: typingBounce 1.4s ease-in-out infinite both;
}
[data-theme="claude"] .typing-indicator .dot:nth-child(1) { animation-delay: -0.32s; }
[data-theme="claude"] .typing-indicator .dot:nth-child(2) { animation-delay: -0.16s; }
[data-theme="claude"] .typing-indicator .dot:nth-child(3) { animation-delay: 0s; }
@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* V17: Message hover lift */
[data-theme="claude"] .message {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
[data-theme="claude"] .message:hover {
  transform: translateY(-1px);
}
[data-theme="claude"] .message.user:hover .message-bubble {
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
[data-theme="claude"] .message.assistant:hover {
  box-shadow: none;
}

/* V18: Dropdown panel slide + fade */
[data-theme="claude"] .dropdown-panel {
  opacity: 0;
  transform: translateY(-8px) scale(0.97);
  transform-origin: top center;
  transition: opacity 0.18s ease, transform 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}
[data-theme="claude"] .dropdown-panel.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* V19: Modal backdrop blur + content scale */
[data-theme="claude"] .modal-overlay {
  opacity: 0;
  backdrop-filter: blur(0px);
  transition: opacity 0.2s ease, backdrop-filter 0.2s ease;
}
[data-theme="claude"] .modal-overlay.active {
  opacity: 1;
  backdrop-filter: blur(4px);
}
[data-theme="claude"] .modal-overlay .modal-content,
[data-theme="claude"] .modal-overlay .win11-explorer {
  transform: scale(0.95);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}
[data-theme="claude"] .modal-overlay.active .modal-content,
[data-theme="claude"] .modal-overlay.active .win11-explorer {
  transform: scale(1);
  opacity: 1;
}

/* Settings modal window */
.settings-modal {
  width: 680px;
  max-width: 90vw;
  height: 520px;
  max-height: 80vh;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
}
.settings-modal-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--surf);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.settings-modal-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.settings-modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}
.settings-modal-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  cursor: pointer;
  transition: background .15s;
  user-select: none;
  border-bottom: 1px solid var(--border);
}
.settings-modal-row:last-child { border-bottom: none; }
.settings-modal-row:hover { background: var(--surf2); }
.settings-modal-row-left {
  display: flex;
  align-items: center;
  gap: 14px;
}
.settings-modal-row-icon {
  color: var(--muted);
  display: flex;
  align-items: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 8px;
  justify-content: center;
}
.settings-modal-row-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}
.settings-modal-row-desc {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

/* Claude theme overrides for settings modal */
[data-theme="claude"] .settings-modal {
  background: #1c1917;
  border-color: #292524;
}
[data-theme="claude"] .settings-modal-titlebar {
  background: #1c1917;
  border-color: #292524;
}
[data-theme="claude"] .settings-modal-row { border-color: rgba(255,255,255,.06); }
[data-theme="claude"] .settings-modal-row:hover { background: rgba(255,255,255,.04); }
[data-theme="claude"] .settings-modal-row-icon {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.1);
}

/* Animation */
.settings-modal {
  transform: scale(0.95);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}
.modal-overlay.active .settings-modal {
  transform: scale(1);
  opacity: 1;
}

/* V20: Tool card slide-in */
[data-theme="claude"] .tool-card {
  animation: toolSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes toolSlideIn {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* V21: Copy button glow pulse */
[data-theme="claude"] .copy-btn {
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
[data-theme="claude"] .copy-btn:hover {
  box-shadow: 0 0 8px color-mix(in srgb, var(--blue) 30%, transparent);
}
[data-theme="claude"] .copy-btn:active {
  transform: scale(0.92);
}

/* V22: Win11 file item hover lift + check animation */
.win11-file-item {
  transition: transform 0.15s ease, background 0.1s, border-color 0.1s;
}
.win11-file-item:hover {
  transform: translateY(-2px);
}
.win11-file-item.selected {
  animation: fileSelectPop 0.25s ease;
}
@keyframes fileSelectPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.04); }
  100% { transform: scale(1); }
}

/* V23: Sidebar chat items stagger entrance */
[data-theme="claude"] .claude-sidebar-chat {
  animation: sidebarItemIn 0.2s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: calc(var(--item-index, 0) * 0.03s);
}
@keyframes sidebarItemIn {
  from { opacity: 0; transform: translateX(-8px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* V24: Header button hover glow */
[data-theme="claude"] .claude-header-btn {
  transition: background 0.15s, color 0.15s, box-shadow 0.15s, transform 0.15s;
}
[data-theme="claude"] .claude-header-btn:hover {
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent);
  transform: translateY(-1px);
}

/* V25: Chip entrance stagger */
[data-theme="claude"] .claude-chip {
  animation: chipIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: calc(var(--chip-index, 0) * 0.05s);
}
@keyframes chipIn {
  from { opacity: 0; transform: translateY(8px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* V26: Attachment badge pulse on new */
[data-theme="claude"] .claude-attached-file {
  animation: badgeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes badgeIn {
  from { opacity: 0; transform: scale(0.8); }
  to   { opacity: 1; transform: scale(1); }
}

/* V27: Scroll-to-bottom FAB bounce */
[data-theme="claude"] .scroll-to-bottom-btn.visible {
  animation: fabBounceIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes fabBounceIn {
  from { opacity: 0; transform: translateY(20px) scale(0.7); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* V28: Send button ripple (CSS-based) */
[data-theme="claude"] .send-btn {
  position: relative;
  overflow: hidden;
}
[data-theme="claude"] .send-btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
  pointer-events: none;
  z-index: 0;
}
[data-theme="claude"] .send-btn:active::before {
  width: 120%;
  height: 120%;
}
[data-theme="claude"] .send-btn .icon-svg {
  position: relative;
  z-index: 1;
}

/* V29: Nav item icon subtle bounce on hover */
[data-theme="claude"] .claude-nav-item .icon {
  transition: transform 0.2s ease;
}
[data-theme="claude"] .claude-nav-item:hover .icon {
  transform: scale(1.15) rotate(-3deg);
}

/* V30: Empty state fade-in */
[data-theme="claude"] .claude-empty-chat {
  animation: emptyFadeIn 0.5s ease both;
}
@keyframes emptyFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* V31: Code block entrance */
[data-theme="claude"] .markdown-content pre {
  animation: codeBlockIn 0.3s ease both;
}
@keyframes codeBlockIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* V32: Toast error shake */
.toast.toast-error.toast-visible {
  animation: toastShake 0.4s ease both;
}
@keyframes toastShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(2px); }
}

/* V-H: Empty chat state */
[data-theme="claude"] .claude-empty-chat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 8px;
  color: var(--muted);
}
[data-theme="claude"] .claude-empty-icon {
  font-size: 2.5rem;
  color: color-mix(in srgb, var(--accent) 40%, transparent);
  line-height: 1;
}
[data-theme="claude"] .claude-empty-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
}
[data-theme="claude"] .claude-empty-sub {
  font-size: 0.82rem;
}
[data-theme="claude"] .claude-empty-sub strong {
  color: var(--accent);
}

/* File picker tabs */
.file-picker-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}
.file-picker-tab {
  padding: 6px 14px;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}
.file-picker-tab:hover {
  background: color-mix(in srgb, var(--text) 5%, transparent);
  color: var(--text);
}
.file-picker-tab.active {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--text);
}

/* File drop zone */
.file-drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.file-drop-zone:hover,
.file-drop-zone.dragover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 4%, transparent);
}

/* File action links */
.file-action-link {
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.15s;
  font-size: 13px;
  padding: 2px;
}
.file-action-link:hover {
  opacity: 1;
}

/* Sidebar sandbox files section */
[data-theme="claude"] .claude-sidebar-files {
  max-height: 160px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-height: 0;
}
[data-theme="claude"] .claude-sidebar-upload-btn {
  font-size: 11px;
  color: var(--accent);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: background 0.15s;
}
[data-theme="claude"] .claude-sidebar-upload-btn:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}
[data-theme="claude"] .claude-sidebar-file {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
[data-theme="claude"] .claude-sidebar-file:hover {
  background: color-mix(in srgb, var(--text) 6%, transparent);
  color: var(--text);
}
[data-theme="claude"] .claude-sidebar-file .file-del {
  display: none;
  margin-left: auto;
  font-size: 11px;
  opacity: 0.5;
  padding: 2px;
  border-radius: 3px;
}
[data-theme="claude"] .claude-sidebar-file:hover .file-del {
  display: inline;
}
[data-theme="claude"] .claude-sidebar-file .file-del:hover {
  opacity: 1;
  background: var(--surf);
}

/* ============================================
   WINDOWS 11 EXPLORER FILE PICKER
   ============================================ */

.win11-explorer {
  width: 680px;
  max-width: 90vw;
  height: 520px;
  max-height: 80vh;
  background: var(--sidebar);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
}

/* Title bar */
.win11-titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: color-mix(in srgb, var(--sidebar) 80%, #000);
  border-bottom: 1px solid var(--border);
  -webkit-app-region: drag;
}
.win11-title-icon {
  font-size: 16px;
}
.win11-title-text {
  flex: 1;
  font-size: 12px;
  color: var(--text);
  font-weight: 500;
}
.win11-title-actions {
  display: flex;
  gap: 4px;
}
.win11-title-btn {
  width: 32px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--muted);
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}
.win11-title-btn:hover {
  background: #c42b1c;
  color: #fff;
}

/* Command bar */
.win11-cmdbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}
.win11-cmdgroup {
  display: flex;
  gap: 4px;
}
.win11-cmdbtn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.win11-cmdbtn:hover {
  background: color-mix(in srgb, var(--text) 6%, transparent);
  border-color: var(--border);
}
.win11-cmdbtn:active {
  background: color-mix(in srgb, var(--text) 10%, transparent);
}
.win11-cmdbtn svg {
  flex-shrink: 0;
}
.win11-view-btn {
  padding: 6px 8px;
}
.win11-view-btn.active {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  color: var(--accent);
}

/* Address bar */
.win11-addressbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}
.win11-address-item {
  padding: 2px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.12s;
}
.win11-address-item:hover {
  background: color-mix(in srgb, var(--text) 6%, transparent);
}
.win11-address-item.active {
  color: var(--text);
  font-weight: 500;
}
.win11-address-sep {
  opacity: 0.4;
}

/* Content area */
.win11-content {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

/* File grid */
.win11-filegrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
}
.win11-filegrid.list-view {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

/* File item */
.win11-file-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 8px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.1s, border-color 0.1s;
  position: relative;
  user-select: none;
}
.win11-file-item:hover {
  background: color-mix(in srgb, var(--text) 4%, transparent);
}
.win11-file-item.selected {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
}
.win11-file-item.selected .win11-file-check {
  opacity: 1;
}

/* Checkbox overlay */
.win11-file-check {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 18px;
  height: 18px;
  opacity: 0;
  transition: opacity 0.15s;
  accent-color: var(--accent);
}
.win11-file-item:hover .win11-file-check {
  opacity: 1;
}
.win11-file-check:checked {
  opacity: 1;
}

/* File icon */
.win11-file-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--surf) 50%, transparent);
}

/* File name */
.win11-file-name {
  font-size: 11px;
  color: var(--text);
  text-align: center;
  word-break: break-word;
  max-width: 100%;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* List view item */
.win11-filegrid.list-view .win11-file-item {
  flex-direction: row;
  padding: 6px 10px;
  gap: 10px;
  align-items: center;
}
.win11-filegrid.list-view .win11-file-icon {
  width: 24px;
  height: 24px;
  font-size: 16px;
  background: none;
}
.win11-filegrid.list-view .win11-file-name {
  text-align: left;
  flex: 1;
  -webkit-line-clamp: 1;
}
.win11-filegrid.list-view .win11-file-meta {
  font-size: 11px;
  color: var(--muted);
  min-width: 60px;
  text-align: right;
}

/* Context menu */
.win11-ctxmenu {
  position: absolute;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  min-width: 160px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  z-index: 1000;
}
.win11-ctxitem {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.1s;
}
.win11-ctxitem:hover {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}
.win11-ctxsep {
  height: 1px;
  background: var(--border);
  margin: 4px 6px;
}

/* Upload area */
.win11-upload-area {
  flex: 1;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.win11-upload-area .file-drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 40px 24px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.win11-upload-area .file-drop-zone:hover,
.win11-upload-area .file-drop-zone.dragover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 4%, transparent);
}
.win11-upload-area .file-drop-zone svg {
  margin-bottom: 12px;
  color: var(--accent);
}

/* Status bar */
.win11-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--sidebar) 80%, #000);
  font-size: 11px;
  color: var(--muted);
}
.win11-status-actions {
  display: flex;
  gap: 8px;
}

/* Empty state inside explorer */
.win11-empty-files {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

/* ============================================
   MODEL PICKER (Custom dropdown for Claude theme)
   ============================================ */

[data-theme="claude"] .model-picker {
  position: relative;
  display: inline-block;
}

[data-theme="claude"] .model-picker-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: var(--surf2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
  max-width: 200px;
  white-space: nowrap;
}

[data-theme="claude"] .model-picker-trigger:hover {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
  background: color-mix(in srgb, var(--accent) 5%, var(--surf2));
}

[data-theme="claude"] .model-picker-trigger.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 15%, transparent);
}

[data-theme="claude"] .model-picker-trigger .provider-icon {
  font-size: 14px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
}

[data-theme="claude"] .model-picker-trigger .provider-icon img,
[data-theme="claude"] .model-picker-item .item-icon img {
  width: 16px;
  height: 16px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.85;
}

[data-theme="claude"] .model-picker-trigger .model-name {
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

[data-theme="claude"] .model-picker-trigger .tool-badge {
  font-size: 10px;
  color: var(--green);
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}
[data-theme="claude"] .model-picker-trigger .tool-badge svg {
  width: 12px;
  height: 12px;
}
[data-theme="claude"] .model-picker-trigger .vision-badge {
  font-size: 10px;
  color: var(--accent2);
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}
[data-theme="claude"] .model-picker-trigger .vision-badge svg {
  width: 12px;
  height: 12px;
}

[data-theme="claude"] .model-picker-trigger .chevron {
  font-size: 10px;
  color: var(--muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

[data-theme="claude"] .model-picker-trigger.active .chevron {
  transform: rotate(180deg);
}

[data-theme="claude"] .model-picker-dropdown {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 0;
  width: 320px;
  max-height: 420px;
  background: var(--surf);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.4);
  z-index: 200;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(8px) scale(0.97);
  transform-origin: bottom right;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="claude"] .model-picker-dropdown.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

[data-theme="claude"] .model-picker-search {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

[data-theme="claude"] .model-picker-search input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 13px;
  outline: none;
}

[data-theme="claude"] .model-picker-search input::placeholder {
  color: var(--muted);
}

[data-theme="claude"] .model-picker-search .search-icon {
  font-size: 12px;
  color: var(--muted);
}

[data-theme="claude"] .model-picker-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
}

[data-theme="claude"] .model-picker-group {
  margin-bottom: 4px;
}

[data-theme="claude"] .model-picker-group-title {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  position: sticky;
  top: 0;
  background: var(--surf);
  z-index: 1;
}

[data-theme="claude"] .model-picker-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.1s ease;
  font-size: 13px;
  color: var(--text);
}

[data-theme="claude"] .model-picker-item:hover {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

[data-theme="claude"] .model-picker-item.selected {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
}

[data-theme="claude"] .model-picker-item .item-icon {
  font-size: 14px;
  flex-shrink: 0;
  width: 18px;
  text-align: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

[data-theme="claude"] .model-picker-item .item-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

[data-theme="claude"] .model-picker-item .item-tools {
  font-size: 10px;
  color: var(--green);
  flex-shrink: 0;
}
[data-theme="claude"] .model-picker-item .item-vision {
  font-size: 10px;
  color: var(--accent2);
  flex-shrink: 0;
}
[data-theme="claude"] .model-picker-item .item-vision svg {
  width: 12px;
  height: 12px;
}

[data-theme="claude"] .model-picker-item .item-check {
  font-size: 12px;
  color: var(--accent);
  flex-shrink: 0;
  opacity: 0;
}

[data-theme="claude"] .model-picker-item.selected .item-check {
  opacity: 1;
}

[data-theme="claude"] .model-picker-empty {
  padding: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

[data-theme="claude"] .model-picker-trigger.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  border-color: var(--border);
}


[data-theme="claude"] .model-picker-group-title img {
  width: 12px;
  height: 12px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.6;
}

/* ============================================
   PROJECTS PANEL
   ============================================ */

[data-theme="claude"] .save-context-btn {
  width: 100%;
  padding: 8px 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  margin-bottom: 10px;
}

[data-theme="claude"] .save-context-btn:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 85%, white);
}

[data-theme="claude"] .save-context-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: var(--border);
}

[data-theme="claude"] .projects-list-title {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
}

[data-theme="claude"] .projects-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 240px;
  overflow-y: auto;
}

[data-theme="claude"] .project-context-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text);
  transition: background 0.12s;
}

[data-theme="claude"] .project-context-item:hover {
  background: color-mix(in srgb, var(--text) 6%, transparent);
}

[data-theme="claude"] .project-context-item .ctx-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: monospace;
  font-size: 11px;
}

[data-theme="claude"] .project-context-item .ctx-actions {
  display: flex;
  gap: 4px;
  margin-left: 6px;
}

[data-theme="claude"] .project-context-item .ctx-btn {
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  border: none;
  cursor: pointer;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  transition: background 0.12s;
}

[data-theme="claude"] .project-context-item .ctx-btn:hover {
  background: color-mix(in srgb, var(--accent) 25%, transparent);
}

[data-theme="claude"] .project-context-item .ctx-btn.del {
  background: color-mix(in srgb, var(--red) 10%, transparent);
  color: var(--red);
}

[data-theme="claude"] .project-context-item .ctx-btn.del:hover {
  background: color-mix(in srgb, var(--red) 20%, transparent);
}

/* ============================================
   SVG ICONS (Heroicons-style)
   ============================================ */

.icon-svg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-svg svg {
  width: 1em;
  height: 1em;
  display: block;
}

/* Sidebar nav icons */
[data-theme="claude"] .claude-nav-item .icon-svg {
  width: 20px;
  height: 20px;
}

[data-theme="claude"] .claude-nav-item .icon-svg svg {
  width: 20px;
  height: 20px;
}

/* Toolbar icons */
[data-theme="claude"] .claude-tool-btn .icon-svg,
[data-theme="claude"] .send-btn .icon-svg {
  width: 18px;
  height: 18px;
}

[data-theme="claude"] .claude-tool-btn .icon-svg svg,
[data-theme="claude"] .send-btn .icon-svg svg {
  width: 18px;
  height: 18px;
}

/* Msg action icons */
[data-theme="claude"] .msg-action-btn .icon-svg {
  width: 14px;
  height: 14px;
}

[data-theme="claude"] .msg-action-btn .icon-svg svg {
  width: 14px;
  height: 14px;
}

/* Chip icons */
[data-theme="claude"] .claude-chip .icon-svg {
  width: 16px;
  height: 16px;
}

[data-theme="claude"] .claude-chip .icon-svg svg {
  width: 16px;
  height: 16px;
}

/* Header icons */
[data-theme="claude"] .claude-header-btn .icon-svg {
  width: 18px;
  height: 18px;
}

[data-theme="claude"] .claude-header-btn .icon-svg svg {
  width: 18px;
  height: 18px;
}

/* Sidebar toggle */
[data-theme="claude"] .claude-sidebar-toggle .icon-svg {
  width: 20px;
  height: 20px;
}

[data-theme="claude"] .claude-sidebar-toggle .icon-svg svg {
  width: 20px;
  height: 20px;
}

/* Scroll to bottom FAB */
[data-theme="claude"] .scroll-to-bottom-btn .icon-svg {
  width: 18px;
  height: 18px;
}

[data-theme="claude"] .scroll-to-bottom-btn .icon-svg svg {
  width: 18px;
  height: 18px;
}

/* Welcome sparkle */
[data-theme="claude"] .claude-welcome-title .icon-svg {
  width: 32px;
  height: 32px;
  color: var(--accent);
  margin-right: 8px;
}

[data-theme="claude"] .claude-welcome-title .icon-svg svg {
  width: 32px;
  height: 32px;
}

/* Empty state icons */
[data-theme="claude"] .claude-empty-icon .icon-svg {
  width: 40px;
  height: 40px;
}

[data-theme="claude"] .claude-empty-icon .icon-svg svg {
  width: 40px;
  height: 40px;
}

/* Model picker trigger icon */
[data-theme="claude"] .model-picker-trigger .provider-icon svg {
  width: 16px;
  height: 16px;
}

/* Toast icons */
.toast .icon-svg {
  width: 14px;
  height: 14px;
  margin-right: 6px;
}

/* Topbar buttons */
.tb-btn .icon-svg {
  width: 16px;
  height: 16px;
}

/* Thinking block */
.thinking-block {
  margin-bottom: 12px;
  border-radius: 8px;
  background: var(--surf2);
  border: 1px solid var(--border);
  overflow: hidden;
}
.thinking-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
  font-size: 12px;
  color: var(--muted);
  transition: background 0.15s ease;
}
.thinking-header:hover {
  background: var(--border);
}
.thinking-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.thinking-icon svg {
  width: 14px;
  height: 14px;
  color: var(--accent2);
}
.thinking-label {
  flex: 1;
  font-weight: 600;
}
.thinking-chevron {
  transition: transform 0.2s ease;
  font-size: 10px;
}
.thinking-block.expanded .thinking-chevron {
  transform: rotate(180deg);
}
.thinking-content {
  padding: 0 12px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  white-space: pre-wrap;
  display: none;
  max-height: 300px;
  overflow-y: auto;
}
.thinking-block.expanded .thinking-content {
  display: block;
}

/* Thinking block active animation */
.thinking-block.thinking-active .thinking-icon svg {
  animation: thinkingPulse 1.5s ease-in-out infinite;
}
@keyframes thinkingPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}
.thinking-block.thinking-active .thinking-label::after {
  content: '...';
  animation: thinkingDots 1.5s steps(4, end) infinite;
}
@keyframes thinkingDots {
  0% { content: ''; }
  25% { content: '.'; }
  50% { content: '..'; }
  75% { content: '...'; }
}


/* ============================================
   IMAGE UPLOAD & VISION
   ============================================ */

/* Drop overlay */
.chat-image-drop-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
}
.chat-image-drop-content {
  color: var(--text);
  text-align: center;
  font-size: 18px;
  font-weight: 600;
}
.chat-image-drop-content svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  color: var(--accent2);
}

/* Image previews in input */
.claude-image-previews {
  display: flex;
  gap: 8px;
  padding: 8px 12px 0;
  overflow-x: auto;
  flex-shrink: 0;
}
.claude-image-preview {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--surf2);
}
.claude-image-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.claude-image-preview .remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 12px;
  border: none;
  padding: 0;
}
.claude-image-preview .remove svg {
  width: 12px;
  height: 12px;
}

/* Attached images in messages */
.message-images {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.message-image-wrap {
  width: 160px;
  height: 160px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surf2);
  flex-shrink: 0;
}
.message-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: pointer;
  transition: transform 0.2s ease;
}
.message-image:hover {
  transform: scale(1.02);
}

/* Responsive (images) */
@media (max-width: 640px) {
  .message-image-wrap {
    width: 120px;
    height: 120px;
  }
}

/* ============================================
   MOBILE / RESPONSIVE — Claude Theme
   ============================================ */

/* Overlay that appears behind the sidebar when it opens on mobile */
.claude-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 98;       /* below sidebar (z-index:100) */
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  animation: overlayFadeIn 0.2s ease;
}
.claude-sidebar-overlay.active {
  display: block;
}
@keyframes overlayFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ─── Tablet / large phone (≤ 900px) ─── */
@media (max-width: 900px) {
  /* Sidebar becomes a full-height drawer over the content */
  [data-theme="claude"] .claude-sidebar {
    position: fixed;
    left: -260px;  /* hidden by default on mobile */
    z-index: 100;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
  }

  /* When sidebar is NOT hidden (drawer open) */
  [data-theme="claude"] .claude-sidebar:not(.hidden) {
    left: 0;
  }

  /* Main always takes full width on mobile */
  [data-theme="claude"] .claude-main {
    margin-left: 0 !important;
    width: 100%;
  }

  /* Header: a bit more compact */
  [data-theme="claude"] .claude-header {
    padding: 10px 16px;
  }

  /* Hide plan text on tablets — save horizontal space */
  [data-theme="claude"] .claude-header-plan {
    display: none;
  }

  /* Welcome: less vertical padding */
  [data-theme="claude"] .claude-welcome {
    padding: 28px 20px;
    gap: 24px;
  }

  /* Welcome title: fluid size */
  [data-theme="claude"] .claude-welcome-title {
    font-size: clamp(1.4rem, 4.5vw, 2rem);
  }

  /* Chips: horizontal scroll, no wrapping */
  [data-theme="claude"] .claude-chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    mask-image: linear-gradient(to right, transparent 0, black 16px, black calc(100% - 16px), transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0, black 16px, black calc(100% - 16px), transparent 100%);
  }
  [data-theme="claude"] .claude-chips::-webkit-scrollbar { display: none; }

  /* Messages: tighter padding */
  [data-theme="claude"] .claude-messages {
    padding: 16px 16px 16px 16px;
    gap: 16px;
    max-width: 100%;
  }

  /* User bubble: allow a bit wider on mobile */
  [data-theme="claude"] .message.user .message-bubble {
    max-width: 88%;
  }

  /* Chat input: less side padding, full width */
  [data-theme="claude"] .claude-chat-view .claude-input-wrapper {
    padding: 8px 12px 20px;
    max-width: 100%;
  }

  /* Scroll-to-bottom FAB: move left on mobile */
  [data-theme="claude"] .scroll-to-bottom-btn {
    right: 16px;
    bottom: 80px;
  }

  /* Model picker dropdown: fixed position to avoid horizontal overflow on mobile */
  [data-theme="claude"] .model-picker-dropdown {
    position: fixed;
    left: 12px;
    right: 12px;
    width: auto;
    top: auto;
    bottom: 90px;
    max-height: min(60vh, 420px);
  }

  /* Prevent iOS auto-zoom on search input focus (must be >= 16px) */
  [data-theme="claude"] .model-picker-search input {
    font-size: 16px;
  }

  /* Win11 explorer modal: slide up from bottom on mobile */
  .modal-overlay {
    align-items: flex-end;
  }
  .win11-explorer {
    width: 100%;
    max-width: 100%;
    height: min(90vh, 600px);
    border-radius: 16px 16px 0 0;
  }

  /* Dropdown panels: constrain to viewport */
  .dropdown-panel {
    min-width: 260px;
    max-width: calc(100vw - 24px);
  }
}

/* ─── Phone (≤ 500px) ─── */
@media (max-width: 500px) {
  /* Sidebar a touch narrower so it doesn't eat the whole screen */
  [data-theme="claude"] .claude-sidebar {
    width: 240px;
    left: -240px;
  }
  [data-theme="claude"] .claude-sidebar:not(.hidden) {
    left: 0;
  }

  /* Welcome: minimal padding */
  [data-theme="claude"] .claude-welcome {
    padding: 20px 12px;
    gap: 16px;
  }

  [data-theme="claude"] .claude-welcome-title {
    font-size: clamp(1.1rem, 6vw, 1.5rem);
  }

  /* Chips: smaller pills */
  [data-theme="claude"] .claude-chip {
    font-size: 12px;
    padding: 5px 10px;
    flex-shrink: 0;
    border-radius: 999px;
  }

  /* Input box: tighter padding and border-radius */
  [data-theme="claude"] .claude-input-box {
    padding: 10px 14px;
    border-radius: 16px;
    gap: 8px;
  }

  [data-theme="claude"] .claude-input-box textarea {
    font-size: 16px;       /* ≥16px prevents iOS auto-zoom */
    min-height: 36px;
  }

  /* Input toolbar: compact spacing */
  [data-theme="claude"] .claude-input-right {
    gap: 8px;
  }

  [data-theme="claude"] .claude-tool-btn {
    width: 26px;
    height: 26px;
  }

  /* Messages: minimal padding */
  [data-theme="claude"] .claude-messages {
    padding: 12px;
    gap: 12px;
  }

  /* Chat input wrapper */
  [data-theme="claude"] .claude-chat-view .claude-input-wrapper {
    padding: 6px 10px 14px;
  }

  /* Header */
  [data-theme="claude"] .claude-header {
    padding: 8px 12px;
  }

  /* Model picker trigger: constrain width */
  [data-theme="claude"] .model-picker-trigger {
    max-width: 140px;
    font-size: 12px;
    padding: 5px 8px;
  }

  /* Win11 explorer: full height */
  .win11-explorer {
    height: min(95vh, 640px);
  }

  /* Hide command bar labels on tiny screens */
  .win11-cmdbtn span {
    display: none;
  }
  .win11-cmdbtn {
    padding: 6px 8px;
  }

  /* Avatar size reduction */
  [data-theme="claude"] .msg-avatar {
    width: 24px;
    height: 24px;
    font-size: 12px;
  }

  /* Sidebar search input */
  [data-theme="claude"] .claude-sidebar {
    padding: 14px 10px;
  }
}