/* Sidebar */
.sidebar {
  width: 272px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform 0.24s ease;
  z-index: 30;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 18px 16px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--accent);
  color: #FFFFFF;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.close-sidebar-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s ease, color 0.15s ease;
}

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

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(28, 27, 24, 0.35);
  z-index: 25;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s ease;
}

.new-chat-btn {
  margin: 0 14px 14px;
  padding: 10px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.new-chat-btn:hover {
  border-color: var(--border-strong);
  background: #FCFBF9;
}

.history-label {
  padding: 6px 18px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.history-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.history-item {
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  transition: background 0.12s ease, color 0.12s ease;
}

.history-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.history-item.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.history-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.delete-chat {
  opacity: 0;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 14px;
}

.history-item:hover .delete-chat {
  opacity: 1;
}

.delete-chat:hover {
  color: var(--danger);
  background: rgba(180, 60, 60, 0.08);
}

.sidebar-footer {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
}

.settings-trigger {
  width: 100%;
  padding: 9px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s ease, color 0.15s ease;
}

.settings-trigger:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Main Area */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  width: 100%;
  background: var(--bg-app);
  overflow-x: hidden;
}

.topbar {
  min-height: 56px;
  padding: 6px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: rgba(247, 246, 242, 0.92);
  backdrop-filter: blur(8px);
  z-index: 20;
  flex-shrink: 0;
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.topbar-right {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.topbar-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

.menu-btn {
  display: none;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 9px;
  cursor: pointer;
  color: var(--text-primary);
  flex-shrink: 0;
}

.chat-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 20px 18px;
}

.chat-container {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.composer-wrapper {
  padding: 8px 20px 20px;
  background: var(--bg-app);
  flex-shrink: 0;
}

@media (max-width: 820px) {
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
  }

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

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

  .close-sidebar-btn {
    display: inline-flex;
  }

  .menu-btn {
    display: inline-flex;
  }

  .topbar {
    padding: 6px 12px;
  }

  .chat-scroll {
    padding: 20px 14px 14px;
  }

  .composer-wrapper {
    padding: 8px 12px 16px;
  }
}

@media (max-width: 600px) {
  .topbar-title {
    display: none;
  }
}

/* Kartu Akun Pengguna & Tombol Login di Sidebar */
.account-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 10px;
  margin-bottom: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.account-card[hidden] {
  display: none;
}

.account-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.account-info strong {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.account-info span {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logout-btn {
  border: 1px solid var(--border);
  background: var(--bg-app);
  color: var(--text-secondary);
  font-size: 11.5px;
  font-weight: 500;
  padding: 5px 9px;
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
}

.logout-btn:hover {
  color: var(--danger);
  border-color: var(--danger-border);
  background: var(--danger-bg);
}

.sidebar-login-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 9px 12px;
  margin-bottom: 8px;
  background: var(--accent);
  color: #FFFFFF;
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.sidebar-login-btn[hidden] {
  display: none;
}

.sidebar-login-btn:hover {
  background: var(--accent-hover);
}