/* 代码块复制按钮样式（兼容 KB 与文档阅读页两套主题） */
.code-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    z-index: 3;
    padding: 1px 8px;
    border: 1px solid #232e2b;
    border-radius: 4px;
    background: #141b19;
    color: #9fb0aa;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 11px;
    line-height: 1.7;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.code-copy-btn:hover,
.code-copy-btn:focus {
    opacity: 1;
    color: #2fd39b;
    border-color: #2fd39b;
    outline: none;
}

.code-copy-btn.is-done {
    color: #2fd39b;
    border-color: #2fd39b;
    opacity: 1;
}