/* 主题切换器样式 */
.theme-switcher {
    display: flex;
    gap: 3px;
    align-items: center;
    padding: 2px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
}

.theme-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--text-sub);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 12px;
    position: relative;
    overflow: hidden;
}

.theme-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--blue);
    transform: translate(-50%, -50%);
    transition: width 0.25s, height 0.25s;
    z-index: -1;
}

.theme-btn:hover {
    color: #ffffff;
}

.theme-btn:hover::before {
    width: 100%;
    height: 100%;
}

.theme-btn.active {
    background: var(--blue);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(66, 153, 225, 0.4);
}

/* 响应式 */
@media (max-width: 768px) {
    .theme-switcher {
        gap: 2px;
        padding: 2px;
    }
    .theme-btn {
        width: 26px;
        height: 26px;
        font-size: 11px;
    }
}