/* ── Copilot panel ─────────────────────────────────────────────────────────── */

app-copilot {
  display: flex;
  flex-direction: column;
  position: relative;
  width: var(--copilot-width);
  height: 100%;
  border-left: 1px solid var(--toolbar-border);
  background: var(--copilot-bg);
  flex-shrink: 0;
}

app-copilot.collapsed:not([mode="full"]) {
  width: 0;
  min-width: 0;
  border: none;
  overflow: hidden;
}

/* ── Full mode (home route): the chat fills the workspace ──────────────────── */

app-copilot[mode="full"] {
  flex: 1;
  width: auto;
  min-width: 0;
  border-left: none;
}

/* Center the conversation in a readable column on wide screens. */
app-copilot[mode="full"] .copilot-header,
app-copilot[mode="full"] .copilot-tabs,
app-copilot[mode="full"] .copilot-messages,
app-copilot[mode="full"] .copilot-input-area {
  padding-left:  max(1.25rem, calc((100% - 860px) / 2));
  padding-right: max(1.25rem, calc((100% - 860px) / 2));
}

app-copilot[mode="full"] .copilot-header {
  font-size: 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

app-copilot[mode="full"] .copilot-msg {
  max-width: 80%;
}

/* ── Welcome hero (empty state, full mode) ─────────────────────────────────── */

.chat-hero {
  margin: auto;
  text-align: center;
  max-width: 560px;
  padding: 2rem 1rem;
}

.chat-hero-logo {
  width: 88px;
  height: 88px;
  border-radius: 24px;
  box-shadow: var(--card-shadow);
}

.chat-hero-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 1.1rem 0 0.3rem;
}

.chat-hero-sub {
  color: var(--placeholder-color);
  font-size: 1rem;
  margin: 0 0 1.75rem;
}

.chat-suggestions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  text-align: left;
}

.chat-suggestion {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--msg-assistant-text);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.95rem;
  font-size: 0.92rem;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.12s, box-shadow 0.15s;
}

.chat-suggestion i {
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.chat-suggestion:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--card-shadow);
}

@media (max-width: 560px) {
  .chat-suggestions { grid-template-columns: 1fr; }
}

/* ── Privacy chip (chat header) ────────────────────────────────────────────── */

.chat-privacy {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-left: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  cursor: default;
}

.chat-privacy i {
  font-size: 0.68rem;
}

.copilot-resize-handle {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  cursor: col-resize;
  z-index: 20;
  transition: background 0.15s;
}

.copilot-resize-handle:hover,
.copilot-resize-handle:active {
  background: rgba(var(--accent-rgb), 0.35);
}

.copilot-expand-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  flex: 1;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--accent);
  font-size: 1.1rem;
  writing-mode: vertical-rl;
  padding: 1rem 0;
}

.copilot-expand-btn:hover {
  background: var(--sidebar-hover);
}

.copilot-collapse-btn {
  flex-shrink: 0;
  padding: 0.2rem 0.4rem;
  line-height: 1;
}

.copilot-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--toolbar-border);
  font-weight: 600;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.copilot-header i {
  font-size: 1rem;
  color: var(--accent);
}

/* ── Tabs (General + project chats) ─────────────────────────────────────────── */
.copilot-tabs {
  display: flex;
  align-items: stretch;
  gap: 2px;
  padding: 0 0.5rem;
  border-bottom: 1px solid var(--toolbar-border);
  overflow-x: auto;
  flex-shrink: 0;
}

.copilot-tab {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  max-width: 160px;
  padding: 0.4rem 0.6rem;
  font-size: 0.78rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  color: var(--bs-secondary-color, #6c757d);
  white-space: nowrap;
}

.copilot-tab:hover {
  background: var(--toolbar-border);
}

.copilot-tab--active {
  color: var(--bs-body-color, inherit);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.copilot-tab-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.copilot-tab-close {
  border: none;
  background: none;
  padding: 0;
  line-height: 1;
  cursor: pointer;
  color: inherit;
  opacity: 0.6;
  flex-shrink: 0;
}

.copilot-tab-close:hover {
  opacity: 1;
}

/* Inline rename: sits in the tab's own box so the bar doesn't reflow while
   typing. Sized off the label so a long name still scrolls within its tab. */
.copilot-tab-rename {
  width: 100%;
  min-width: 80px;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0 0.2rem;
  font: inherit;
  color: var(--bs-body-color, inherit);
  background: var(--bs-body-bg, #fff);
  outline: 2px solid var(--accent);
}

/* ── New-chat menu ──────────────────────────────────────────────────────────── */
.copilot-tab-new {
  position: relative;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.copilot-tab-add {
  border: none;
  background: none;
  padding: 0.2rem 0.4rem;
  line-height: 1;
  cursor: pointer;
  color: var(--bs-secondary-color, #6c757d);
  border-radius: var(--radius-sm);
}

.copilot-tab-add:hover {
  background: var(--toolbar-border);
  color: var(--bs-body-color, inherit);
}

.copilot-tab-menu {
  position: fixed;
  z-index: 100;
  min-width: 180px;
  max-height: 260px;
  overflow-y: auto;
  padding: 0.25rem;
  border: 1px solid var(--toolbar-border);
  border-radius: var(--radius-md);
  background: var(--bs-body-bg, #fff);
  box-shadow: 0 8px 24px rgb(0 0 0 / 12%);
}

.copilot-tab-menu-item {
  display: block;
  width: 100%;
  border: none;
  background: none;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  text-align: left;
  cursor: pointer;
  color: inherit;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.copilot-tab-menu-item:hover {
  background: var(--toolbar-border);
}

.copilot-tab-menu-empty {
  padding: 0.4rem 0.6rem;
  font-size: 0.82rem;
  color: var(--bs-secondary-color, #6c757d);
}