/* ========== 顶部状态栏 ========== */
.topbar {
  height: 56px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  flex-shrink: 0;
  z-index: 10;
}
.topbar-left { display:flex; align-items:center; gap:10px; }
.topbar-logo {
  width: 32px; height: 32px;
  border-radius: 8px;
  object-fit: cover;
}
.topbar-brand {
  font-size: 16px; font-weight: 700;
  background: linear-gradient(135deg,#44CC44,#22ddbb);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.topbar-divider { color: var(--text-dim); }
.topbar-title { font-size: 14px; color: var(--text-normal); }
.topbar-right { display:flex; align-items:center; gap:14px; }

/* 状态 */
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 6px rgba(68,204,68,.6);
  transition: .3s;
}
.status-dot.error { background: var(--danger); box-shadow: 0 0 6px rgba(239,68,68,.6); }
.status-dot.busy { background: var(--warn); box-shadow: 0 0 6px rgba(255,170,0,.6); animation: pulse 1s infinite; }
.status-text { font-size: 12px; color: var(--text-dim); }

/* OpenCV 加载按钮 */
.cv-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-normal);
  padding: 5px 12px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
  transition: .2s;
  white-space: nowrap;
}
.cv-btn:hover { border-color: var(--accent); color: var(--accent); }
.cv-btn:disabled { opacity: .6; cursor: wait; }
.cv-btn.cv-ready {
  border-color: rgba(68,204,68,.4);
  background: var(--accent-dim);
  color: var(--accent);
  cursor: default;
}

/* 关闭服务按钮（红色警示） */
.shutdown-btn {
  background: transparent;
  border: 1px solid rgba(239,68,68,.5);
  color: var(--danger, #ef4444);
  padding: 5px 12px;
  border-radius: 8px;
  font-size: 12px;
  cursor: pointer;
  transition: .2s;
  white-space: nowrap;
}
.shutdown-btn:hover {
  border-color: #ff6b6b;
  color: #ff6b6b;
  background: rgba(239,68,68,.08);
}
.shutdown-btn:disabled { opacity: .5; cursor: not-allowed; }

/* 语言切换 */
.lang-switch {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: .2s;
}
.lang-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 600;
}
.lang-btn:hover { color: var(--text-bright); }