/* 协作面板：只新增类名，不影响现有画布样式。 */

.collab-panel {
  position: fixed;
  top: 84px;
  right: 20px;
  z-index: 80;
  width: min(340px, calc(100vw - 32px));
  max-height: calc(100vh - 130px);
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 20px 60px var(--shadow);
  backdrop-filter: blur(18px);
  overflow: hidden;
}
.collab-panel[hidden] { display: none; }
.collab-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 15px 10px;
  border-bottom: 1px solid var(--line);
}
.collab-head h3 { font-size: 13px; font-weight: 800; }
.collab-count { color: var(--faint); font-size: 11px; }
.collab-close {
  width: 26px; height: 26px; border-radius: 8px;
  display: grid; place-items: center;
  color: var(--muted);
}
.collab-close:hover { background: var(--soft); color: var(--text); }
.collab-body { padding: 10px 12px 14px; overflow: auto; }
.collab-empty { color: var(--faint); font-size: 12px; padding: 10px 2px; }

.collab-member {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 6px; border-radius: 10px;
}
.collab-member:hover { background: var(--soft); }
.collab-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center; flex-shrink: 0;
  background: var(--soft-2); color: var(--muted);
  font-size: 11px; font-weight: 800;
}
.collab-member-main { flex: 1; min-width: 0; }
.collab-member-name { font-size: 12px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.collab-member-sub { font-size: 10px; color: var(--faint); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.collab-badge {
  height: 19px; padding: 0 7px; border-radius: 999px;
  display: inline-flex; align-items: center;
  font-size: 9px; font-weight: 800;
  background: color-mix(in srgb, var(--text) 8%, transparent);
  color: var(--muted);
  white-space: nowrap;
}
.collab-badge.owner { color: var(--success); background: color-mix(in srgb, var(--success) 12%, transparent); }
.collab-kick {
  color: var(--danger); font-size: 10px; font-weight: 700;
  padding: 4px 6px; border-radius: 7px;
}
.collab-kick:hover { background: color-mix(in srgb, var(--danger) 10%, transparent); }

.collab-section { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); }
.collab-label { font-size: 10px; font-weight: 800; color: var(--faint); margin-bottom: 7px; letter-spacing: .04em; }
.collab-link-row { display: flex; gap: 6px; }
.collab-link {
  flex: 1; min-width: 0; height: 34px;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--soft); color: var(--muted);
  padding: 0 9px; font-size: 11px; outline: none;
}
.collab-btn {
  height: 34px; padding: 0 11px; border-radius: 9px;
  background: var(--strong); color: var(--strong-text);
  font-size: 11px; font-weight: 800; white-space: nowrap;
}
.collab-btn:hover { filter: brightness(1.06); }
.collab-btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.collab-btn.danger { background: transparent; color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); }
.collab-btn:disabled { opacity: .45; cursor: default; }
.collab-actions { display: flex; gap: 7px; margin-top: 8px; flex-wrap: wrap; }
.collab-hint { color: var(--faint); font-size: 10.5px; line-height: 1.6; margin-top: 8px; }
.collab-option {
  display: flex; align-items: center; gap: 7px;
  color: var(--muted); font-size: 10.5px; line-height: 1.5;
}
.collab-option input { accent-color: var(--strong); }
.collab-msg { font-size: 11px; line-height: 1.6; margin-top: 8px; color: var(--muted); }
.collab-msg.error { color: var(--danger); }

@media (max-width: 520px) {
  .collab-panel { top: 70px; right: 10px; left: 10px; width: auto; }
}